-- Fennel compiler retrieved from https://fennel-lang.org/downloads/fennel-1.3.0.tar.gz
-- MIT License

-- Copyright © 2016-2022 Calvin Rose and contributors

-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:

-- The above copyright notice and this permission notice shall be included in all
-- copies or substantial portions of the Software.

-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-- SOFTWARE.
package.preload["fennel.repl"] = package.preload["fennel.repl"] or function(...)
  local utils = require("fennel.utils")
  local parser = require("fennel.parser")
  local compiler = require("fennel.compiler")
  local specials = require("fennel.specials")
  local view = require("fennel.view")
  local unpack = (table.unpack or _G.unpack)
  local function default_read_chunk(parser_state)
    local function _631_()
      if (0 < parser_state["stack-size"]) then
        return ".."
      else
        return ">> "
      end
    end
    io.write(_631_())
    io.flush()
    local input = io.read()
    return (input and (input .. "\n"))
  end
  local function default_on_values(xs)
    io.write(table.concat(xs, "\9"))
    return io.write("\n")
  end
  local function default_on_error(errtype, err, lua_source)
    local function _633_()
      local _632_ = errtype
      if (_632_ == "Lua Compile") then
        return ("Bad code generated - likely a bug with the compiler:\n" .. "--- Generated Lua Start ---\n" .. lua_source .. "--- Generated Lua End ---\n")
      elseif (_632_ == "Runtime") then
        return (compiler.traceback(tostring(err), 4) .. "\n")
      elseif true then
        local _ = _632_
        return ("%s error: %s\n"):format(errtype, tostring(err))
      else
        return nil
      end
    end
    return io.write(_633_())
  end
  local function splice_save_locals(env, lua_source, scope)
    local saves
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for name in pairs(env.___replLocals___) do
        local val_18_auto = ("local %s = ___replLocals___['%s']"):format(name, name)
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      saves = tbl_16_auto
    end
    local binds
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for _, name in pairs(scope.manglings) do
        local val_18_auto
        if not scope.gensyms[name] then
          val_18_auto = ("___replLocals___['%s'] = %s"):format(name, name)
        else
          val_18_auto = nil
        end
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      binds = tbl_16_auto
    end
    local gap
    if lua_source:find("\n") then
      gap = "\n"
    else
      gap = " "
    end
    local function _639_()
      if next(saves) then
        return (table.concat(saves, " ") .. gap)
      else
        return ""
      end
    end
    local function _642_()
      local _640_, _641_ = lua_source:match("^(.*)[\n ](return .*)$")
      if ((nil ~= _640_) and (nil ~= _641_)) then
        local body = _640_
        local _return = _641_
        return (body .. gap .. table.concat(binds, " ") .. gap .. _return)
      elseif true then
        local _ = _640_
        return lua_source
      else
        return nil
      end
    end
    return (_639_() .. _642_())
  end
  local function completer(env, scope, text)
    local max_items = 2000
    local seen = {}
    local matches = {}
    local input_fragment = text:gsub(".*[%s)(]+", "")
    local stop_looking_3f = false
    local function add_partials(input, tbl, prefix)
      local scope_first_3f = ((tbl == env) or (tbl == env.___replLocals___))
      local tbl_16_auto = matches
      local i_17_auto = #tbl_16_auto
      local function _644_()
        if scope_first_3f then
          return scope.manglings
        else
          return tbl
        end
      end
      for k, is_mangled in utils.allpairs(_644_()) do
        if (max_items <= #matches) then break end
        local val_18_auto
        do
          local lookup_k
          if scope_first_3f then
            lookup_k = is_mangled
          else
            lookup_k = k
          end
          if ((type(k) == "string") and (input == k:sub(0, #input)) and not seen[k] and ((":" ~= prefix:sub(-1)) or ("function" == type(tbl[lookup_k])))) then
            seen[k] = true
            val_18_auto = (prefix .. k)
          else
            val_18_auto = nil
          end
        end
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      return tbl_16_auto
    end
    local function descend(input, tbl, prefix, add_matches, method_3f)
      local splitter
      if method_3f then
        splitter = "^([^:]+):(.*)"
      else
        splitter = "^([^.]+)%.(.*)"
      end
      local head, tail = input:match(splitter)
      local raw_head = (scope.manglings[head] or head)
      if (type(tbl[raw_head]) == "table") then
        stop_looking_3f = true
        if method_3f then
          return add_partials(tail, tbl[raw_head], (prefix .. head .. ":"))
        else
          return add_matches(tail, tbl[raw_head], (prefix .. head))
        end
      else
        return nil
      end
    end
    local function add_matches(input, tbl, prefix)
      local prefix0
      if prefix then
        prefix0 = (prefix .. ".")
      else
        prefix0 = ""
      end
      if (not input:find("%.") and input:find(":")) then
        return descend(input, tbl, prefix0, add_matches, true)
      elseif not input:find("%.") then
        return add_partials(input, tbl, prefix0)
      else
        return descend(input, tbl, prefix0, add_matches, false)
      end
    end
    for _, source in ipairs({scope.specials, scope.macros, (env.___replLocals___ or {}), env, env._G}) do
      if stop_looking_3f then break end
      add_matches(input_fragment, source)
    end
    return matches
  end
  local commands = {}
  local function command_3f(input)
    return input:match("^%s*,")
  end
  local function command_docs()
    local _653_
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for name, f in pairs(commands) do
        local val_18_auto = ("  ,%s - %s"):format(name, ((compiler.metadata):get(f, "fnl/docstring") or "undocumented"))
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      _653_ = tbl_16_auto
    end
    return table.concat(_653_, "\n")
  end
  commands.help = function(_, _0, on_values)
    return on_values({("Welcome to Fennel.\nThis is the REPL where you can enter code to be evaluated.\nYou can also run these repl commands:\n\n" .. command_docs() .. "\n  ,exit - Leave the repl.\n\nUse ,doc something to see descriptions for individual macros and special forms.\n\nFor more information about the language, see https://fennel-lang.org/reference")})
  end
  do end (compiler.metadata):set(commands.help, "fnl/docstring", "Show this message.")
  local function reload(module_name, env, on_values, on_error)
    local _655_, _656_ = pcall(specials["load-code"]("return require(...)", env), module_name)
    if ((_655_ == true) and (nil ~= _656_)) then
      local old = _656_
      local _
      package.loaded[module_name] = nil
      _ = nil
      local ok, new = pcall(require, module_name)
      local new0
      if not ok then
        on_values({new})
        new0 = old
      else
        new0 = new
      end
      specials["macro-loaded"][module_name] = nil
      if ((type(old) == "table") and (type(new0) == "table")) then
        for k, v in pairs(new0) do
          old[k] = v
        end
        for k in pairs(old) do
          if (nil == (new0)[k]) then
            old[k] = nil
          else
          end
        end
        package.loaded[module_name] = old
      else
      end
      return on_values({"ok"})
    elseif ((_655_ == false) and (nil ~= _656_)) then
      local msg = _656_
      if msg:match("loop or previous error loading module") then
        package.loaded[module_name] = nil
        return reload(module_name, env, on_values, on_error)
      elseif (specials["macro-loaded"])[module_name] then
        specials["macro-loaded"][module_name] = nil
        return nil
      else
        local function _661_()
          local _660_ = msg:gsub("\n.*", "")
          return _660_
        end
        return on_error("Runtime", _661_())
      end
    else
      return nil
    end
  end
  local function run_command(read, on_error, f)
    local _664_, _665_, _666_ = pcall(read)
    if ((_664_ == true) and (_665_ == true) and (nil ~= _666_)) then
      local val = _666_
      return f(val)
    elseif (_664_ == false) then
      return on_error("Parse", "Couldn't parse input.")
    else
      return nil
    end
  end
  commands.reload = function(env, read, on_values, on_error)
    local function _668_(_241)
      return reload(tostring(_241), env, on_values, on_error)
    end
    return run_command(read, on_error, _668_)
  end
  do end (compiler.metadata):set(commands.reload, "fnl/docstring", "Reload the specified module.")
  commands.reset = function(env, _, on_values)
    env.___replLocals___ = {}
    return on_values({"ok"})
  end
  do end (compiler.metadata):set(commands.reset, "fnl/docstring", "Erase all repl-local scope.")
  commands.complete = function(env, read, on_values, on_error, scope, chars)
    local function _669_()
      return on_values(completer(env, scope, string.char(unpack(chars)):gsub(",complete +", ""):sub(1, -2)))
    end
    return run_command(read, on_error, _669_)
  end
  do end (compiler.metadata):set(commands.complete, "fnl/docstring", "Print all possible completions for a given input symbol.")
  local function apropos_2a(pattern, tbl, prefix, seen, names)
    for name, subtbl in pairs(tbl) do
      if (("string" == type(name)) and (package ~= subtbl)) then
        local _670_ = type(subtbl)
        if (_670_ == "function") then
          if ((prefix .. name)):match(pattern) then
            table.insert(names, (prefix .. name))
          else
          end
        elseif (_670_ == "table") then
          if not seen[subtbl] then
            local _673_
            do
              local _672_ = seen
              _672_[subtbl] = true
              _673_ = _672_
            end
            apropos_2a(pattern, subtbl, (prefix .. name:gsub("%.", "/") .. "."), _673_, names)
          else
          end
        else
        end
      else
      end
    end
    return names
  end
  local function apropos(pattern)
    local names = apropos_2a(pattern, package.loaded, "", {}, {})
    local tbl_16_auto = {}
    local i_17_auto = #tbl_16_auto
    for _, name in ipairs(names) do
      local val_18_auto = name:gsub("^_G%.", "")
      if (nil ~= val_18_auto) then
        i_17_auto = (i_17_auto + 1)
        do end (tbl_16_auto)[i_17_auto] = val_18_auto
      else
      end
    end
    return tbl_16_auto
  end
  commands.apropos = function(_env, read, on_values, on_error, _scope)
    local function _678_(_241)
      return on_values(apropos(tostring(_241)))
    end
    return run_command(read, on_error, _678_)
  end
  do end (compiler.metadata):set(commands.apropos, "fnl/docstring", "Print all functions matching a pattern in all loaded modules.")
  local function apropos_follow_path(path)
    local paths
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for p in path:gmatch("[^%.]+") do
        local val_18_auto = p
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      paths = tbl_16_auto
    end
    local tgt = package.loaded
    for _, path0 in ipairs(paths) do
      if (nil == tgt) then break end
      local _681_
      do
        local _680_ = path0:gsub("%/", ".")
        _681_ = _680_
      end
      tgt = tgt[_681_]
    end
    return tgt
  end
  local function apropos_doc(pattern)
    local tbl_16_auto = {}
    local i_17_auto = #tbl_16_auto
    for _, path in ipairs(apropos(".*")) do
      local val_18_auto
      do
        local tgt = apropos_follow_path(path)
        if ("function" == type(tgt)) then
          local _682_ = (compiler.metadata):get(tgt, "fnl/docstring")
          if (nil ~= _682_) then
            local docstr = _682_
            val_18_auto = (docstr:match(pattern) and path)
          else
            val_18_auto = nil
          end
        else
          val_18_auto = nil
        end
      end
      if (nil ~= val_18_auto) then
        i_17_auto = (i_17_auto + 1)
        do end (tbl_16_auto)[i_17_auto] = val_18_auto
      else
      end
    end
    return tbl_16_auto
  end
  commands["apropos-doc"] = function(_env, read, on_values, on_error, _scope)
    local function _686_(_241)
      return on_values(apropos_doc(tostring(_241)))
    end
    return run_command(read, on_error, _686_)
  end
  do end (compiler.metadata):set(commands["apropos-doc"], "fnl/docstring", "Print all functions that match the pattern in their docs")
  local function apropos_show_docs(on_values, pattern)
    for _, path in ipairs(apropos(pattern)) do
      local tgt = apropos_follow_path(path)
      if (("function" == type(tgt)) and (compiler.metadata):get(tgt, "fnl/docstring")) then
        on_values(specials.doc(tgt, path))
        on_values()
      else
      end
    end
    return nil
  end
  commands["apropos-show-docs"] = function(_env, read, on_values, on_error)
    local function _688_(_241)
      return apropos_show_docs(on_values, tostring(_241))
    end
    return run_command(read, on_error, _688_)
  end
  do end (compiler.metadata):set(commands["apropos-show-docs"], "fnl/docstring", "Print all documentations matching a pattern in function name")
  local function resolve(identifier, _689_, scope)
    local _arg_690_ = _689_
    local ___replLocals___ = _arg_690_["___replLocals___"]
    local env = _arg_690_
    local e
    local function _691_(_241, _242)
      return (___replLocals___[_242] or env[_242])
    end
    e = setmetatable({}, {__index = _691_})
    local _692_, _693_ = pcall(compiler["compile-string"], tostring(identifier), {scope = scope})
    if ((_692_ == true) and (nil ~= _693_)) then
      local code = _693_
      return specials["load-code"](code, e)()
    else
      return nil
    end
  end
  commands.find = function(env, read, on_values, on_error, scope)
    local function _695_(_241)
      local _696_
      do
        local _697_ = utils["sym?"](_241)
        if (nil ~= _697_) then
          local _698_ = resolve(_697_, env, scope)
          if (nil ~= _698_) then
            _696_ = debug.getinfo(_698_)
          else
            _696_ = _698_
          end
        else
          _696_ = _697_
        end
      end
      if ((_G.type(_696_) == "table") and ((_696_).what == "Lua") and (nil ~= (_696_).source) and (nil ~= (_696_).linedefined) and (nil ~= (_696_).short_src)) then
        local source = (_696_).source
        local line = (_696_).linedefined
        local src = (_696_).short_src
        local fnlsrc
        do
          local t_701_ = compiler.sourcemap
          if (nil ~= t_701_) then
            t_701_ = (t_701_)[source]
          else
          end
          if (nil ~= t_701_) then
            t_701_ = (t_701_)[line]
          else
          end
          if (nil ~= t_701_) then
            t_701_ = (t_701_)[2]
          else
          end
          fnlsrc = t_701_
        end
        return on_values({string.format("%s:%s", src, (fnlsrc or line))})
      elseif (_696_ == nil) then
        return on_error("Repl", "Unknown value")
      elseif true then
        local _ = _696_
        return on_error("Repl", "No source info")
      else
        return nil
      end
    end
    return run_command(read, on_error, _695_)
  end
  do end (compiler.metadata):set(commands.find, "fnl/docstring", "Print the filename and line number for a given function")
  commands.doc = function(env, read, on_values, on_error, scope)
    local function _706_(_241)
      local name = tostring(_241)
      local path = (utils["multi-sym?"](name) or {name})
      local ok_3f, target = nil, nil
      local function _707_()
        return (utils["get-in"](scope.specials, path) or utils["get-in"](scope.macros, path) or resolve(name, env, scope))
      end
      ok_3f, target = pcall(_707_)
      if ok_3f then
        return on_values({specials.doc(target, name)})
      else
        return on_error("Repl", "Could not resolve value for docstring lookup")
      end
    end
    return run_command(read, on_error, _706_)
  end
  do end (compiler.metadata):set(commands.doc, "fnl/docstring", "Print the docstring and arglist for a function, macro, or special form.")
  commands.compile = function(env, read, on_values, on_error, scope)
    local function _709_(_241)
      local allowedGlobals = specials["current-global-names"](env)
      local ok_3f, result = pcall(compiler.compile, _241, {env = env, scope = scope, allowedGlobals = allowedGlobals})
      if ok_3f then
        return on_values({result})
      else
        return on_error("Repl", ("Error compiling expression: " .. result))
      end
    end
    return run_command(read, on_error, _709_)
  end
  do end (compiler.metadata):set(commands.compile, "fnl/docstring", "compiles the expression into lua and prints the result.")
  local function load_plugin_commands(plugins)
    for _, plugin in ipairs((plugins or {})) do
      for name, f in pairs(plugin) do
        local _711_ = name:match("^repl%-command%-(.*)")
        if (nil ~= _711_) then
          local cmd_name = _711_
          commands[cmd_name] = (commands[cmd_name] or f)
        else
        end
      end
    end
    return nil
  end
  local function run_command_loop(input, read, loop, env, on_values, on_error, scope, chars)
    local command_name = input:match(",([^%s/]+)")
    do
      local _713_ = commands[command_name]
      if (nil ~= _713_) then
        local command = _713_
        command(env, read, on_values, on_error, scope, chars)
      elseif true then
        local _ = _713_
        if ("exit" ~= command_name) then
          on_values({"Unknown command", command_name})
        else
        end
      else
      end
    end
    if ("exit" ~= command_name) then
      return loop()
    else
      return nil
    end
  end
  local function try_readline_21(opts, ok, readline)
    if ok then
      if readline.set_readline_name then
        readline.set_readline_name("fennel")
      else
      end
      readline.set_options({keeplines = 1000, histfile = ""})
      opts.readChunk = function(parser_state)
        local prompt
        if (0 < parser_state["stack-size"]) then
          prompt = ".. "
        else
          prompt = ">> "
        end
        local str = readline.readline(prompt)
        if str then
          return (str .. "\n")
        else
          return nil
        end
      end
      local completer0 = nil
      opts.registerCompleter = function(repl_completer)
        completer0 = repl_completer
        return nil
      end
      local function repl_completer(text, from, to)
        if completer0 then
          readline.set_completion_append_character("")
          return completer0(text:sub(from, to))
        else
          return {}
        end
      end
      readline.set_complete_function(repl_completer)
      return readline
    else
      return nil
    end
  end
  local function should_use_readline_3f(opts)
    return (("dumb" ~= os.getenv("TERM")) and not opts.readChunk and not opts.registerCompleter)
  end
  local function repl(_3foptions)
    local old_root_options = utils.root.options
    local _let_722_ = utils.copy(_3foptions)
    local _3ffennelrc = _let_722_["fennelrc"]
    local opts = _let_722_
    local _
    opts.fennelrc = nil
    _ = nil
    local readline = (should_use_readline_3f(opts) and try_readline_21(opts, pcall(require, "readline")))
    local _0
    if _3ffennelrc then
      _0 = _3ffennelrc()
    else
      _0 = nil
    end
    local env = specials["wrap-env"]((opts.env or rawget(_G, "_ENV") or _G))
    local save_locals_3f = (opts.saveLocals ~= false)
    local read_chunk = (opts.readChunk or default_read_chunk)
    local on_values = (opts.onValues or default_on_values)
    local on_error = (opts.onError or default_on_error)
    local pp = (opts.pp or view)
    local byte_stream, clear_stream = parser.granulate(read_chunk)
    local chars = {}
    local read, reset = nil, nil
    local function _724_(parser_state)
      local c = byte_stream(parser_state)
      table.insert(chars, c)
      return c
    end
    read, reset = parser.parser(_724_)
    opts.env, opts.scope = env, compiler["make-scope"]()
    opts.useMetadata = (opts.useMetadata ~= false)
    if (opts.allowedGlobals == nil) then
      opts.allowedGlobals = specials["current-global-names"](env)
    else
    end
    if opts.registerCompleter then
      local function _728_()
        local _726_ = env
        local _727_ = opts.scope
        local function _729_(...)
          return completer(_726_, _727_, ...)
        end
        return _729_
      end
      opts.registerCompleter(_728_())
    else
    end
    load_plugin_commands(opts.plugins)
    if save_locals_3f then
      local function newindex(t, k, v)
        if opts.scope.unmanglings[k] then
          return rawset(t, k, v)
        else
          return nil
        end
      end
      env.___replLocals___ = setmetatable({}, {__newindex = newindex})
    else
    end
    local function print_values(...)
      local vals = {...}
      local out = {}
      env._, env.__ = vals[1], vals
      for i = 1, select("#", ...) do
        table.insert(out, pp(vals[i]))
      end
      return on_values(out)
    end
    local function loop()
      for k in pairs(chars) do
        chars[k] = nil
      end
      reset()
      local ok, parser_not_eof_3f, x = pcall(read)
      local src_string = string.char(unpack(chars))
      local readline_not_eof_3f = (not readline or (src_string ~= "(null)"))
      local not_eof_3f = (readline_not_eof_3f and parser_not_eof_3f)
      if not ok then
        on_error("Parse", not_eof_3f)
        clear_stream()
        return loop()
      elseif command_3f(src_string) then
        return run_command_loop(src_string, read, loop, env, on_values, on_error, opts.scope, chars)
      else
        if not_eof_3f then
          do
            local _733_, _734_ = nil, nil
            local function _736_()
              local _735_ = opts
              _735_["source"] = src_string
              return _735_
            end
            _733_, _734_ = pcall(compiler.compile, x, _736_())
            if ((_733_ == false) and (nil ~= _734_)) then
              local msg = _734_
              clear_stream()
              on_error("Compile", msg)
            elseif ((_733_ == true) and (nil ~= _734_)) then
              local src = _734_
              local src0
              if save_locals_3f then
                src0 = splice_save_locals(env, src, opts.scope)
              else
                src0 = src
              end
              local _738_, _739_ = pcall(specials["load-code"], src0, env)
              if ((_738_ == false) and (nil ~= _739_)) then
                local msg = _739_
                clear_stream()
                on_error("Lua Compile", msg, src0)
              elseif (true and (nil ~= _739_)) then
                local _1 = _738_
                local chunk = _739_
                local function _740_()
                  return print_values(chunk())
                end
                local function _741_()
                  local function _742_(...)
                    return on_error("Runtime", ...)
                  end
                  return _742_
                end
                xpcall(_740_, _741_())
              else
              end
            else
            end
          end
          utils.root.options = old_root_options
          return loop()
        else
          return nil
        end
      end
    end
    loop()
    if readline then
      return readline.save_history()
    else
      return nil
    end
  end
  return repl
end
package.preload["fennel.specials"] = package.preload["fennel.specials"] or function(...)
  local utils = require("fennel.utils")
  local view = require("fennel.view")
  local parser = require("fennel.parser")
  local compiler = require("fennel.compiler")
  local unpack = (table.unpack or _G.unpack)
  local SPECIALS = compiler.scopes.global.specials
  local function wrap_env(env)
    local function _424_(_, key)
      if utils["string?"](key) then
        return env[compiler["global-unmangling"](key)]
      else
        return env[key]
      end
    end
    local function _426_(_, key, value)
      if utils["string?"](key) then
        env[compiler["global-unmangling"](key)] = value
        return nil
      else
        env[key] = value
        return nil
      end
    end
    local function _428_()
      local function putenv(k, v)
        local _429_
        if utils["string?"](k) then
          _429_ = compiler["global-unmangling"](k)
        else
          _429_ = k
        end
        return _429_, v
      end
      return next, utils.kvmap(env, putenv), nil
    end
    return setmetatable({}, {__index = _424_, __newindex = _426_, __pairs = _428_})
  end
  local function current_global_names(_3fenv)
    local mt
    do
      local _431_ = getmetatable(_3fenv)
      if ((_G.type(_431_) == "table") and (nil ~= (_431_).__pairs)) then
        local mtpairs = (_431_).__pairs
        local tbl_13_auto = {}
        for k, v in mtpairs(_3fenv) do
          local k_14_auto, v_15_auto = k, v
          if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
            tbl_13_auto[k_14_auto] = v_15_auto
          else
          end
        end
        mt = tbl_13_auto
      elseif (_431_ == nil) then
        mt = (_3fenv or _G)
      else
        mt = nil
      end
    end
    return (mt and utils.kvmap(mt, compiler["global-unmangling"]))
  end
  local function load_code(code, _3fenv, _3ffilename)
    local env = (_3fenv or rawget(_G, "_ENV") or _G)
    local _434_, _435_ = rawget(_G, "setfenv"), rawget(_G, "loadstring")
    if ((nil ~= _434_) and (nil ~= _435_)) then
      local setfenv = _434_
      local loadstring = _435_
      local f = assert(loadstring(code, _3ffilename))
      local _436_ = f
      setfenv(_436_, env)
      return _436_
    elseif true then
      local _ = _434_
      return assert(load(code, _3ffilename, "t", env))
    else
      return nil
    end
  end
  local function doc_2a(tgt, name)
    if not tgt then
      return (name .. " not found")
    else
      local docstring = (((compiler.metadata):get(tgt, "fnl/docstring") or "#<undocumented>")):gsub("\n$", ""):gsub("\n", "\n  ")
      local mt = getmetatable(tgt)
      if ((type(tgt) == "function") or ((type(mt) == "table") and (type(mt.__call) == "function"))) then
        local arglist = table.concat(((compiler.metadata):get(tgt, "fnl/arglist") or {"#<unknown-arguments>"}), " ")
        local _438_
        if (0 < #arglist) then
          _438_ = " "
        else
          _438_ = ""
        end
        return string.format("(%s%s%s)\n  %s", name, _438_, arglist, docstring)
      else
        return string.format("%s\n  %s", name, docstring)
      end
    end
  end
  local function doc_special(name, arglist, docstring, body_form_3f)
    compiler.metadata[SPECIALS[name]] = {["fnl/arglist"] = arglist, ["fnl/docstring"] = docstring, ["fnl/body-form?"] = body_form_3f}
    return nil
  end
  local function compile_do(ast, scope, parent, _3fstart)
    local start = (_3fstart or 2)
    local len = #ast
    local sub_scope = compiler["make-scope"](scope)
    for i = start, len do
      compiler.compile1(ast[i], sub_scope, parent, {nval = 0})
    end
    return nil
  end
  SPECIALS["do"] = function(ast, scope, parent, opts, _3fstart, _3fchunk, _3fsub_scope, _3fpre_syms)
    local start = (_3fstart or 2)
    local sub_scope = (_3fsub_scope or compiler["make-scope"](scope))
    local chunk = (_3fchunk or {})
    local len = #ast
    local retexprs = {returned = true}
    local function compile_body(outer_target, outer_tail, outer_retexprs)
      if (len < start) then
        compiler.compile1(nil, sub_scope, chunk, {tail = outer_tail, target = outer_target})
      else
        for i = start, len do
          local subopts = {nval = (((i ~= len) and 0) or opts.nval), tail = (((i == len) and outer_tail) or nil), target = (((i == len) and outer_target) or nil)}
          local _ = utils["propagate-options"](opts, subopts)
          local subexprs = compiler.compile1(ast[i], sub_scope, chunk, subopts)
          if (i ~= len) then
            compiler["keep-side-effects"](subexprs, parent, nil, ast[i])
          else
          end
        end
      end
      compiler.emit(parent, chunk, ast)
      compiler.emit(parent, "end", ast)
      utils.hook("do", ast, sub_scope)
      return (outer_retexprs or retexprs)
    end
    if (opts.target or (opts.nval == 0) or opts.tail) then
      compiler.emit(parent, "do", ast)
      return compile_body(opts.target, opts.tail)
    elseif opts.nval then
      local syms = {}
      for i = 1, opts.nval do
        local s = ((_3fpre_syms and (_3fpre_syms)[i]) or compiler.gensym(scope))
        do end (syms)[i] = s
        retexprs[i] = utils.expr(s, "sym")
      end
      local outer_target = table.concat(syms, ", ")
      compiler.emit(parent, string.format("local %s", outer_target), ast)
      compiler.emit(parent, "do", ast)
      return compile_body(outer_target, opts.tail)
    else
      local fname = compiler.gensym(scope)
      local fargs
      if scope.vararg then
        fargs = "..."
      else
        fargs = ""
      end
      compiler.emit(parent, string.format("local function %s(%s)", fname, fargs), ast)
      return compile_body(nil, true, utils.expr((fname .. "(" .. fargs .. ")"), "statement"))
    end
  end
  doc_special("do", {"..."}, "Evaluate multiple forms; return last value.", true)
  SPECIALS.values = function(ast, scope, parent)
    local len = #ast
    local exprs = {}
    for i = 2, len do
      local subexprs = compiler.compile1(ast[i], scope, parent, {nval = ((i ~= len) and 1)})
      table.insert(exprs, subexprs[1])
      if (i == len) then
        for j = 2, #subexprs do
          table.insert(exprs, subexprs[j])
        end
      else
      end
    end
    return exprs
  end
  doc_special("values", {"..."}, "Return multiple values from a function. Must be in tail position.")
  local function __3estack(stack, tbl)
    for k, v in pairs(tbl) do
      local _447_ = stack
      table.insert(_447_, k)
      table.insert(_447_, v)
    end
    return stack
  end
  local function literal_3f(val)
    local res = true
    if utils["list?"](val) then
      res = false
    elseif utils["table?"](val) then
      local stack = __3estack({}, val)
      for _, elt in ipairs(stack) do
        if not res then break end
        if utils["list?"](elt) then
          res = false
        elseif utils["table?"](elt) then
          __3estack(stack, elt)
        else
        end
      end
    else
    end
    return res
  end
  local function compile_value(v)
    local opts = {nval = 1, tail = false}
    local scope = compiler["make-scope"]()
    local chunk = {}
    local _let_450_ = compiler.compile1(v, scope, chunk, opts)
    local _let_451_ = _let_450_[1]
    local v0 = _let_451_[1]
    return v0
  end
  local function insert_meta(meta, k, v)
    local view_opts = {["escape-newlines?"] = true, ["line-length"] = math.huge, ["one-line?"] = true}
    compiler.assert((type(k) == "string"), ("expected string keys in metadata table, got: %s"):format(view(k, view_opts)))
    compiler.assert(literal_3f(v), ("expected literal value in metadata table, got: %s %s"):format(view(k, view_opts), view(v, view_opts)))
    local _452_ = meta
    table.insert(_452_, view(k))
    local function _453_()
      if ("string" == type(v)) then
        return view(v, view_opts)
      else
        return compile_value(v)
      end
    end
    table.insert(_452_, _453_())
    return _452_
  end
  local function insert_arglist(meta, arg_list)
    local view_opts = {["one-line?"] = true, ["escape-newlines?"] = true, ["line-length"] = math.huge}
    local _454_ = meta
    table.insert(_454_, "\"fnl/arglist\"")
    local function _455_(_241)
      return view(view(_241, view_opts))
    end
    table.insert(_454_, ("{" .. table.concat(utils.map(arg_list, _455_), ", ") .. "}"))
    return _454_
  end
  local function set_fn_metadata(f_metadata, parent, fn_name)
    if utils.root.options.useMetadata then
      local meta_fields = {}
      for k, v in utils.stablepairs(f_metadata) do
        if (k == "fnl/arglist") then
          insert_arglist(meta_fields, v)
        else
          insert_meta(meta_fields, k, v)
        end
      end
      local meta_str = ("require(\"%s\").metadata"):format((utils.root.options.moduleName or "fennel"))
      return compiler.emit(parent, ("pcall(function() %s:setall(%s, %s) end)"):format(meta_str, fn_name, table.concat(meta_fields, ", ")))
    else
      return nil
    end
  end
  local function get_fn_name(ast, scope, fn_name, multi)
    if (fn_name and (fn_name[1] ~= "nil")) then
      local _458_
      if not multi then
        _458_ = compiler["declare-local"](fn_name, {}, scope, ast)
      else
        _458_ = (compiler["symbol-to-expression"](fn_name, scope))[1]
      end
      return _458_, not multi, 3
    else
      return nil, true, 2
    end
  end
  local function compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, local_3f, arg_name_list, f_metadata)
    for i = (index + 1), #ast do
      compiler.compile1(ast[i], f_scope, f_chunk, {nval = (((i ~= #ast) and 0) or nil), tail = (i == #ast)})
    end
    local _461_
    if local_3f then
      _461_ = "local function %s(%s)"
    else
      _461_ = "%s = function(%s)"
    end
    compiler.emit(parent, string.format(_461_, fn_name, table.concat(arg_name_list, ", ")), ast)
    compiler.emit(parent, f_chunk, ast)
    compiler.emit(parent, "end", ast)
    set_fn_metadata(f_metadata, parent, fn_name)
    utils.hook("fn", ast, f_scope)
    return utils.expr(fn_name, "sym")
  end
  local function compile_anonymous_fn(ast, f_scope, f_chunk, parent, index, arg_name_list, f_metadata, scope)
    local fn_name = compiler.gensym(scope)
    return compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, true, arg_name_list, f_metadata)
  end
  local function assoc_table_3f(t)
    local len = #t
    local nxt, t0, k = pairs(t)
    local function _463_()
      if (len == 0) then
        return k
      else
        return len
      end
    end
    return (nil ~= nxt(t0, _463_()))
  end
  local function get_function_metadata(ast, arg_list, index)
    local f_metadata = {["fnl/arglist"] = arg_list}
    local index_2a = (index + 1)
    local expr = ast[index_2a]
    if (utils["string?"](expr) and (index_2a < #ast)) then
      local _465_
      do
        local _464_ = f_metadata
        _464_["fnl/docstring"] = expr
        _465_ = _464_
      end
      return _465_, index_2a
    elseif (utils["table?"](expr) and (index_2a < #ast) and assoc_table_3f(expr)) then
      local _466_
      do
        local tbl_13_auto = f_metadata
        for k, v in pairs(expr) do
          local k_14_auto, v_15_auto = k, v
          if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
            tbl_13_auto[k_14_auto] = v_15_auto
          else
          end
        end
        _466_ = tbl_13_auto
      end
      return _466_, index_2a
    else
      return f_metadata, index
    end
  end
  SPECIALS.fn = function(ast, scope, parent)
    local f_scope
    do
      local _469_ = compiler["make-scope"](scope)
      do end (_469_)["vararg"] = false
      f_scope = _469_
    end
    local f_chunk = {}
    local fn_sym = utils["sym?"](ast[2])
    local multi = (fn_sym and utils["multi-sym?"](fn_sym[1]))
    local fn_name, local_3f, index = get_fn_name(ast, scope, fn_sym, multi)
    local arg_list = compiler.assert(utils["table?"](ast[index]), "expected parameters table", ast)
    compiler.assert((not multi or not multi["multi-sym-method-call"]), ("unexpected multi symbol " .. tostring(fn_name)), fn_sym)
    local function destructure_arg(arg)
      local raw = utils.sym(compiler.gensym(scope))
      local declared = compiler["declare-local"](raw, {}, f_scope, ast)
      compiler.destructure(arg, raw, ast, f_scope, f_chunk, {declaration = true, nomulti = true, symtype = "arg"})
      return declared
    end
    local function destructure_amp(i)
      compiler.assert((i == (#arg_list - 1)), "expected rest argument before last parameter", arg_list[(i + 1)], arg_list)
      f_scope.vararg = true
      compiler.destructure(arg_list[#arg_list], {utils.varg()}, ast, f_scope, f_chunk, {declaration = true, nomulti = true, symtype = "arg"})
      return "..."
    end
    local function get_arg_name(arg, i)
      if f_scope.vararg then
        return nil
      elseif utils["varg?"](arg) then
        compiler.assert((arg == arg_list[#arg_list]), "expected vararg as last parameter", ast)
        f_scope.vararg = true
        return "..."
      elseif (utils.sym("&") == arg) then
        return destructure_amp(i)
      elseif (utils["sym?"](arg) and (tostring(arg) ~= "nil") and not utils["multi-sym?"](tostring(arg))) then
        return compiler["declare-local"](arg, {}, f_scope, ast)
      elseif utils["table?"](arg) then
        return destructure_arg(arg)
      else
        return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(arg)), ast[index])
      end
    end
    local arg_name_list
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for i, a in ipairs(arg_list) do
        local val_18_auto = get_arg_name(a, i)
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      arg_name_list = tbl_16_auto
    end
    local f_metadata, index0 = get_function_metadata(ast, arg_list, index)
    if fn_name then
      return compile_named_fn(ast, f_scope, f_chunk, parent, index0, fn_name, local_3f, arg_name_list, f_metadata)
    else
      return compile_anonymous_fn(ast, f_scope, f_chunk, parent, index0, arg_name_list, f_metadata, scope)
    end
  end
  doc_special("fn", {"name?", "args", "docstring?", "..."}, "Function syntax. May optionally include a name and docstring or a metadata table.\nIf a name is provided, the function will be bound in the current scope.\nWhen called with the wrong number of args, excess args will be discarded\nand lacking args will be nil, use lambda for arity-checked functions.", true)
  SPECIALS.lua = function(ast, _, parent)
    compiler.assert(((#ast == 2) or (#ast == 3)), "expected 1 or 2 arguments", ast)
    local _474_
    do
      local _473_ = utils["sym?"](ast[2])
      if (nil ~= _473_) then
        _474_ = tostring(_473_)
      else
        _474_ = _473_
      end
    end
    if ("nil" ~= _474_) then
      table.insert(parent, {ast = ast, leaf = tostring(ast[2])})
    else
    end
    local _478_
    do
      local _477_ = utils["sym?"](ast[3])
      if (nil ~= _477_) then
        _478_ = tostring(_477_)
      else
        _478_ = _477_
      end
    end
    if ("nil" ~= _478_) then
      return tostring(ast[3])
    else
      return nil
    end
  end
  local function dot(ast, scope, parent)
    compiler.assert((1 < #ast), "expected table argument", ast)
    local len = #ast
    local _let_481_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
    local lhs = _let_481_[1]
    if (len == 2) then
      return tostring(lhs)
    else
      local indices = {}
      for i = 3, len do
        local index = ast[i]
        if (utils["string?"](index) and utils["valid-lua-identifier?"](index)) then
          table.insert(indices, ("." .. index))
        else
          local _let_482_ = compiler.compile1(index, scope, parent, {nval = 1})
          local index0 = _let_482_[1]
          table.insert(indices, ("[" .. tostring(index0) .. "]"))
        end
      end
      if (tostring(lhs):find("[{\"0-9]") or ("nil" == tostring(lhs))) then
        return ("(" .. tostring(lhs) .. ")" .. table.concat(indices))
      else
        return (tostring(lhs) .. table.concat(indices))
      end
    end
  end
  SPECIALS["."] = dot
  doc_special(".", {"tbl", "key1", "..."}, "Look up key1 in tbl table. If more args are provided, do a nested lookup.")
  SPECIALS.global = function(ast, scope, parent)
    compiler.assert((#ast == 3), "expected name and value", ast)
    compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceglobal = true, nomulti = true, symtype = "global"})
    return nil
  end
  doc_special("global", {"name", "val"}, "Set name as a global with val.")
  SPECIALS.set = function(ast, scope, parent)
    compiler.assert((#ast == 3), "expected name and value", ast)
    compiler.destructure(ast[2], ast[3], ast, scope, parent, {noundef = true, symtype = "set"})
    return nil
  end
  doc_special("set", {"name", "val"}, "Set a local variable to a new value. Only works on locals using var.")
  local function set_forcibly_21_2a(ast, scope, parent)
    compiler.assert((#ast == 3), "expected name and value", ast)
    compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceset = true, symtype = "set"})
    return nil
  end
  SPECIALS["set-forcibly!"] = set_forcibly_21_2a
  local function local_2a(ast, scope, parent)
    compiler.assert((#ast == 3), "expected name and value", ast)
    compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, nomulti = true, symtype = "local"})
    return nil
  end
  SPECIALS["local"] = local_2a
  doc_special("local", {"name", "val"}, "Introduce new top-level immutable local.")
  SPECIALS.var = function(ast, scope, parent)
    compiler.assert((#ast == 3), "expected name and value", ast)
    compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, isvar = true, nomulti = true, symtype = "var"})
    return nil
  end
  doc_special("var", {"name", "val"}, "Introduce new mutable local.")
  local function kv_3f(t)
    local _486_
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for k in pairs(t) do
        local val_18_auto
        if ("number" ~= type(k)) then
          val_18_auto = k
        else
          val_18_auto = nil
        end
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      _486_ = tbl_16_auto
    end
    return (_486_)[1]
  end
  SPECIALS.let = function(ast, scope, parent, opts)
    local bindings = ast[2]
    local pre_syms = {}
    compiler.assert((utils["table?"](bindings) and not kv_3f(bindings)), "expected binding sequence", bindings)
    compiler.assert(((#bindings % 2) == 0), "expected even number of name/value bindings", ast[2])
    compiler.assert((3 <= #ast), "expected body expression", ast[1])
    for _ = 1, (opts.nval or 0) do
      table.insert(pre_syms, compiler.gensym(scope))
    end
    local sub_scope = compiler["make-scope"](scope)
    local sub_chunk = {}
    for i = 1, #bindings, 2 do
      compiler.destructure(bindings[i], bindings[(i + 1)], ast, sub_scope, sub_chunk, {declaration = true, nomulti = true, symtype = "let"})
    end
    return SPECIALS["do"](ast, scope, parent, opts, 3, sub_chunk, sub_scope, pre_syms)
  end
  doc_special("let", {"[name1 val1 ... nameN valN]", "..."}, "Introduces a new scope in which a given set of local bindings are used.", true)
  local function get_prev_line(parent)
    if ("table" == type(parent)) then
      return get_prev_line((parent.leaf or parent[#parent]))
    else
      return (parent or "")
    end
  end
  local function disambiguate_3f(rootstr, parent)
    local function _491_()
      local _490_ = get_prev_line(parent)
      if (nil ~= _490_) then
        local prev_line = _490_
        return prev_line:match("%)$")
      else
        return nil
      end
    end
    return (rootstr:match("^{") or _491_())
  end
  SPECIALS.tset = function(ast, scope, parent)
    compiler.assert((3 < #ast), "expected table, key, and value arguments", ast)
    local root = (compiler.compile1(ast[2], scope, parent, {nval = 1}))[1]
    local keys = {}
    for i = 3, (#ast - 1) do
      local _let_493_ = compiler.compile1(ast[i], scope, parent, {nval = 1})
      local key = _let_493_[1]
      table.insert(keys, tostring(key))
    end
    local value = (compiler.compile1(ast[#ast], scope, parent, {nval = 1}))[1]
    local rootstr = tostring(root)
    local fmtstr
    if disambiguate_3f(rootstr, parent) then
      fmtstr = "do end (%s)[%s] = %s"
    else
      fmtstr = "%s[%s] = %s"
    end
    return compiler.emit(parent, fmtstr:format(rootstr, table.concat(keys, "]["), tostring(value)), ast)
  end
  doc_special("tset", {"tbl", "key1", "...", "keyN", "val"}, "Set the value of a table field. Can take additional keys to set\nnested values, but all parents must contain an existing table.")
  local function calculate_target(scope, opts)
    if not (opts.tail or opts.target or opts.nval) then
      return "iife", true, nil
    elseif (opts.nval and (opts.nval ~= 0) and not opts.target) then
      local accum = {}
      local target_exprs = {}
      for i = 1, opts.nval do
        local s = compiler.gensym(scope)
        do end (accum)[i] = s
        target_exprs[i] = utils.expr(s, "sym")
      end
      return "target", opts.tail, table.concat(accum, ", "), target_exprs
    else
      return "none", opts.tail, opts.target
    end
  end
  local function if_2a(ast, scope, parent, opts)
    compiler.assert((2 < #ast), "expected condition and body", ast)
    local do_scope = compiler["make-scope"](scope)
    local branches = {}
    local wrapper, inner_tail, inner_target, target_exprs = calculate_target(scope, opts)
    local body_opts = {nval = opts.nval, tail = inner_tail, target = inner_target}
    local function compile_body(i)
      local chunk = {}
      local cscope = compiler["make-scope"](do_scope)
      compiler["keep-side-effects"](compiler.compile1(ast[i], cscope, chunk, body_opts), chunk, nil, ast[i])
      return {chunk = chunk, scope = cscope}
    end
    if (1 == (#ast % 2)) then
      table.insert(ast, utils.sym("nil"))
    else
    end
    for i = 2, (#ast - 1), 2 do
      local condchunk = {}
      local res = compiler.compile1(ast[i], do_scope, condchunk, {nval = 1})
      local cond = res[1]
      local branch = compile_body((i + 1))
      branch.cond = cond
      branch.condchunk = condchunk
      branch.nested = ((i ~= 2) and (next(condchunk, nil) == nil))
      table.insert(branches, branch)
    end
    local else_branch = compile_body(#ast)
    local s = compiler.gensym(scope)
    local buffer = {}
    local last_buffer = buffer
    for i = 1, #branches do
      local branch = branches[i]
      local fstr
      if not branch.nested then
        fstr = "if %s then"
      else
        fstr = "elseif %s then"
      end
      local cond = tostring(branch.cond)
      local cond_line = fstr:format(cond)
      if branch.nested then
        compiler.emit(last_buffer, branch.condchunk, ast)
      else
        for _, v in ipairs(branch.condchunk) do
          compiler.emit(last_buffer, v, ast)
        end
      end
      compiler.emit(last_buffer, cond_line, ast)
      compiler.emit(last_buffer, branch.chunk, ast)
      if (i == #branches) then
        compiler.emit(last_buffer, "else", ast)
        compiler.emit(last_buffer, else_branch.chunk, ast)
        compiler.emit(last_buffer, "end", ast)
      elseif not (branches[(i + 1)]).nested then
        local next_buffer = {}
        compiler.emit(last_buffer, "else", ast)
        compiler.emit(last_buffer, next_buffer, ast)
        compiler.emit(last_buffer, "end", ast)
        last_buffer = next_buffer
      else
      end
    end
    if (wrapper == "iife") then
      local iifeargs = ((scope.vararg and "...") or "")
      compiler.emit(parent, ("local function %s(%s)"):format(tostring(s), iifeargs), ast)
      compiler.emit(parent, buffer, ast)
      compiler.emit(parent, "end", ast)
      return utils.expr(("%s(%s)"):format(tostring(s), iifeargs), "statement")
    elseif (wrapper == "none") then
      for i = 1, #buffer do
        compiler.emit(parent, buffer[i], ast)
      end
      return {returned = true}
    else
      compiler.emit(parent, ("local %s"):format(inner_target), ast)
      for i = 1, #buffer do
        compiler.emit(parent, buffer[i], ast)
      end
      return target_exprs
    end
  end
  SPECIALS["if"] = if_2a
  doc_special("if", {"cond1", "body1", "...", "condN", "bodyN"}, "Conditional form.\nTakes any number of condition/body pairs and evaluates the first body where\nthe condition evaluates to truthy. Similar to cond in other lisps.")
  local function remove_until_condition(bindings)
    local last_item = bindings[(#bindings - 1)]
    if ((utils["sym?"](last_item) and (tostring(last_item) == "&until")) or ("until" == last_item)) then
      table.remove(bindings, (#bindings - 1))
      return table.remove(bindings)
    else
      return nil
    end
  end
  local function compile_until(condition, scope, chunk)
    if condition then
      local _let_502_ = compiler.compile1(condition, scope, chunk, {nval = 1})
      local condition_lua = _let_502_[1]
      return compiler.emit(chunk, ("if %s then break end"):format(tostring(condition_lua)), utils.expr(condition, "expression"))
    else
      return nil
    end
  end
  SPECIALS.each = function(ast, scope, parent)
    compiler.assert((3 <= #ast), "expected body expression", ast[1])
    local binding = compiler.assert(utils["table?"](ast[2]), "expected binding table", ast)
    local _ = compiler.assert((2 <= #binding), "expected binding and iterator", binding)
    local until_condition = remove_until_condition(binding)
    local iter = table.remove(binding, #binding)
    local destructures = {}
    local new_manglings = {}
    local sub_scope = compiler["make-scope"](scope)
    local function destructure_binding(v)
      compiler.assert(not utils["string?"](v), ("unexpected iterator clause " .. tostring(v)), binding)
      if utils["sym?"](v) then
        return compiler["declare-local"](v, {}, sub_scope, ast, new_manglings)
      else
        local raw = utils.sym(compiler.gensym(sub_scope))
        do end (destructures)[raw] = v
        return compiler["declare-local"](raw, {}, sub_scope, ast)
      end
    end
    local bind_vars = utils.map(binding, destructure_binding)
    local vals = compiler.compile1(iter, scope, parent)
    local val_names = utils.map(vals, tostring)
    local chunk = {}
    compiler.emit(parent, ("for %s in %s do"):format(table.concat(bind_vars, ", "), table.concat(val_names, ", ")), ast)
    for raw, args in utils.stablepairs(destructures) do
      compiler.destructure(args, raw, ast, sub_scope, chunk, {declaration = true, nomulti = true, symtype = "each"})
    end
    compiler["apply-manglings"](sub_scope, new_manglings, ast)
    compile_until(until_condition, sub_scope, chunk)
    compile_do(ast, sub_scope, chunk, 3)
    compiler.emit(parent, chunk, ast)
    return compiler.emit(parent, "end", ast)
  end
  doc_special("each", {"[key value (iterator)]", "..."}, "Runs the body once for each set of values provided by the given iterator.\nMost commonly used with ipairs for sequential tables or pairs for  undefined\norder, but can be used with any iterator.", true)
  local function while_2a(ast, scope, parent)
    local len1 = #parent
    local condition = (compiler.compile1(ast[2], scope, parent, {nval = 1}))[1]
    local len2 = #parent
    local sub_chunk = {}
    if (len1 ~= len2) then
      for i = (len1 + 1), len2 do
        table.insert(sub_chunk, parent[i])
        do end (parent)[i] = nil
      end
      compiler.emit(parent, "while true do", ast)
      compiler.emit(sub_chunk, ("if not %s then break end"):format(condition[1]), ast)
    else
      compiler.emit(parent, ("while " .. tostring(condition) .. " do"), ast)
    end
    compile_do(ast, compiler["make-scope"](scope), sub_chunk, 3)
    compiler.emit(parent, sub_chunk, ast)
    return compiler.emit(parent, "end", ast)
  end
  SPECIALS["while"] = while_2a
  doc_special("while", {"condition", "..."}, "The classic while loop. Evaluates body until a condition is non-truthy.", true)
  local function for_2a(ast, scope, parent)
    local ranges = compiler.assert(utils["table?"](ast[2]), "expected binding table", ast)
    local until_condition = remove_until_condition(ast[2])
    local binding_sym = table.remove(ast[2], 1)
    local sub_scope = compiler["make-scope"](scope)
    local range_args = {}
    local chunk = {}
    compiler.assert(utils["sym?"](binding_sym), ("unable to bind %s %s"):format(type(binding_sym), tostring(binding_sym)), ast[2])
    compiler.assert((3 <= #ast), "expected body expression", ast[1])
    compiler.assert((#ranges <= 3), "unexpected arguments", ranges[4])
    for i = 1, math.min(#ranges, 3) do
      range_args[i] = tostring((compiler.compile1(ranges[i], scope, parent, {nval = 1}))[1])
    end
    compiler.emit(parent, ("for %s = %s do"):format(compiler["declare-local"](binding_sym, {}, sub_scope, ast), table.concat(range_args, ", ")), ast)
    compile_until(until_condition, sub_scope, chunk)
    compile_do(ast, sub_scope, chunk, 3)
    compiler.emit(parent, chunk, ast)
    return compiler.emit(parent, "end", ast)
  end
  SPECIALS["for"] = for_2a
  doc_special("for", {"[index start stop step?]", "..."}, "Numeric loop construct.\nEvaluates body once for each value between start and stop (inclusive).", true)
  local function native_method_call(ast, _scope, _parent, target, args)
    local _let_506_ = ast
    local _ = _let_506_[1]
    local _0 = _let_506_[2]
    local method_string = _let_506_[3]
    local call_string
    if ((target.type == "literal") or (target.type == "varg") or (target.type == "expression")) then
      call_string = "(%s):%s(%s)"
    else
      call_string = "%s:%s(%s)"
    end
    return utils.expr(string.format(call_string, tostring(target), method_string, table.concat(args, ", ")), "statement")
  end
  local function nonnative_method_call(ast, scope, parent, target, args)
    local method_string = tostring((compiler.compile1(ast[3], scope, parent, {nval = 1}))[1])
    local args0 = {tostring(target), unpack(args)}
    return utils.expr(string.format("%s[%s](%s)", tostring(target), method_string, table.concat(args0, ", ")), "statement")
  end
  local function double_eval_protected_method_call(ast, scope, parent, target, args)
    local method_string = tostring((compiler.compile1(ast[3], scope, parent, {nval = 1}))[1])
    local call = "(function(tgt, m, ...) return tgt[m](tgt, ...) end)(%s, %s)"
    table.insert(args, 1, method_string)
    return utils.expr(string.format(call, tostring(target), table.concat(args, ", ")), "statement")
  end
  local function method_call(ast, scope, parent)
    compiler.assert((2 < #ast), "expected at least 2 arguments", ast)
    local _let_508_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
    local target = _let_508_[1]
    local args = {}
    for i = 4, #ast do
      local subexprs
      local _509_
      if (i ~= #ast) then
        _509_ = 1
      else
        _509_ = nil
      end
      subexprs = compiler.compile1(ast[i], scope, parent, {nval = _509_})
      utils.map(subexprs, tostring, args)
    end
    if (utils["string?"](ast[3]) and utils["valid-lua-identifier?"](ast[3])) then
      return native_method_call(ast, scope, parent, target, args)
    elseif (target.type == "sym") then
      return nonnative_method_call(ast, scope, parent, target, args)
    else
      return double_eval_protected_method_call(ast, scope, parent, target, args)
    end
  end
  SPECIALS[":"] = method_call
  doc_special(":", {"tbl", "method-name", "..."}, "Call the named method on tbl with the provided args.\nMethod name doesn't have to be known at compile-time; if it is, use\n(tbl:method-name ...) instead.")
  SPECIALS.comment = function(ast, _, parent)
    local els = {}
    for i = 2, #ast do
      table.insert(els, view(ast[i], {["one-line?"] = true}))
    end
    return compiler.emit(parent, ("--[[ " .. table.concat(els, " ") .. " ]]"), ast)
  end
  doc_special("comment", {"..."}, "Comment which will be emitted in Lua output.", true)
  local function hashfn_max_used(f_scope, i, max)
    local max0
    if f_scope.symmeta[("$" .. i)].used then
      max0 = i
    else
      max0 = max
    end
    if (i < 9) then
      return hashfn_max_used(f_scope, (i + 1), max0)
    else
      return max0
    end
  end
  SPECIALS.hashfn = function(ast, scope, parent)
    compiler.assert((#ast == 2), "expected one argument", ast)
    local f_scope
    do
      local _514_ = compiler["make-scope"](scope)
      do end (_514_)["vararg"] = false
      _514_["hashfn"] = true
      f_scope = _514_
    end
    local f_chunk = {}
    local name = compiler.gensym(scope)
    local symbol = utils.sym(name)
    local args = {}
    compiler["declare-local"](symbol, {}, scope, ast)
    for i = 1, 9 do
      args[i] = compiler["declare-local"](utils.sym(("$" .. i)), {}, f_scope, ast)
    end
    local function walker(idx, node, parent_node)
      if (utils["sym?"](node) and (tostring(node) == "$...")) then
        parent_node[idx] = utils.varg()
        f_scope.vararg = true
        return nil
      else
        return (("table" == type(node)) and (utils.sym("hashfn") ~= node[1]) and (utils["list?"](node) or utils["table?"](node)))
      end
    end
    utils["walk-tree"](ast[2], walker)
    compiler.compile1(ast[2], f_scope, f_chunk, {tail = true})
    local max_used = hashfn_max_used(f_scope, 1, 0)
    if f_scope.vararg then
      compiler.assert((max_used == 0), "$ and $... in hashfn are mutually exclusive", ast)
    else
    end
    local arg_str
    if f_scope.vararg then
      arg_str = tostring(utils.varg())
    else
      arg_str = table.concat(args, ", ", 1, max_used)
    end
    compiler.emit(parent, string.format("local function %s(%s)", name, arg_str), ast)
    compiler.emit(parent, f_chunk, ast)
    compiler.emit(parent, "end", ast)
    return utils.expr(name, "sym")
  end
  doc_special("hashfn", {"..."}, "Function literal shorthand; args are either $... OR $1, $2, etc.")
  local function maybe_short_circuit_protect(ast, i, name, _518_)
    local _arg_519_ = _518_
    local mac = _arg_519_["macros"]
    local call = (utils["list?"](ast) and tostring(ast[1]))
    if ((("or" == name) or ("and" == name)) and (1 < i) and (mac[call] or ("set" == call) or ("tset" == call) or ("global" == call))) then
      return utils.list(utils.sym("do"), ast)
    else
      return ast
    end
  end
  local function arithmetic_special(name, zero_arity, unary_prefix, ast, scope, parent)
    local len = #ast
    local operands = {}
    local padded_op = (" " .. name .. " ")
    for i = 2, len do
      local subast = maybe_short_circuit_protect(ast[i], i, name, scope)
      local subexprs = compiler.compile1(subast, scope, parent)
      if (i == len) then
        utils.map(subexprs, tostring, operands)
      else
        table.insert(operands, tostring(subexprs[1]))
      end
    end
    local _522_ = #operands
    if (_522_ == 0) then
      local _524_
      do
        local _523_ = zero_arity
        compiler.assert(_523_, "Expected more than 0 arguments", ast)
        _524_ = _523_
      end
      return utils.expr(_524_, "literal")
    elseif (_522_ == 1) then
      if unary_prefix then
        return ("(" .. unary_prefix .. padded_op .. operands[1] .. ")")
      else
        return operands[1]
      end
    elseif true then
      local _ = _522_
      return ("(" .. table.concat(operands, padded_op) .. ")")
    else
      return nil
    end
  end
  local function define_arithmetic_special(name, zero_arity, unary_prefix, _3flua_name)
    local _530_
    do
      local _527_ = (_3flua_name or name)
      local _528_ = zero_arity
      local _529_ = unary_prefix
      local function _531_(...)
        return arithmetic_special(_527_, _528_, _529_, ...)
      end
      _530_ = _531_
    end
    SPECIALS[name] = _530_
    return doc_special(name, {"a", "b", "..."}, "Arithmetic operator; works the same as Lua but accepts more arguments.")
  end
  define_arithmetic_special("+", "0")
  define_arithmetic_special("..", "''")
  define_arithmetic_special("^")
  define_arithmetic_special("-", nil, "")
  define_arithmetic_special("*", "1")
  define_arithmetic_special("%")
  define_arithmetic_special("/", nil, "1")
  define_arithmetic_special("//", nil, "1")
  SPECIALS["or"] = function(ast, scope, parent)
    return arithmetic_special("or", "false", nil, ast, scope, parent)
  end
  SPECIALS["and"] = function(ast, scope, parent)
    return arithmetic_special("and", "true", nil, ast, scope, parent)
  end
  doc_special("and", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.")
  doc_special("or", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.")
  local function bitop_special(native_name, lib_name, zero_arity, unary_prefix, ast, scope, parent)
    if (#ast == 1) then
      return compiler.assert(zero_arity, "Expected more than 0 arguments.", ast)
    else
      local len = #ast
      local operands = {}
      local padded_native_name = (" " .. native_name .. " ")
      local prefixed_lib_name = ("bit." .. lib_name)
      for i = 2, len do
        local subexprs
        local _532_
        if (i ~= len) then
          _532_ = 1
        else
          _532_ = nil
        end
        subexprs = compiler.compile1(ast[i], scope, parent, {nval = _532_})
        utils.map(subexprs, tostring, operands)
      end
      if (#operands == 1) then
        if utils.root.options.useBitLib then
          return (prefixed_lib_name .. "(" .. unary_prefix .. ", " .. operands[1] .. ")")
        else
          return ("(" .. unary_prefix .. padded_native_name .. operands[1] .. ")")
        end
      else
        if utils.root.options.useBitLib then
          return (prefixed_lib_name .. "(" .. table.concat(operands, ", ") .. ")")
        else
          return ("(" .. table.concat(operands, padded_native_name) .. ")")
        end
      end
    end
  end
  local function define_bitop_special(name, zero_arity, unary_prefix, native)
    local _542_
    do
      local _538_ = native
      local _539_ = name
      local _540_ = zero_arity
      local _541_ = unary_prefix
      local function _543_(...)
        return bitop_special(_538_, _539_, _540_, _541_, ...)
      end
      _542_ = _543_
    end
    SPECIALS[name] = _542_
    return nil
  end
  define_bitop_special("lshift", nil, "1", "<<")
  define_bitop_special("rshift", nil, "1", ">>")
  define_bitop_special("band", "0", "0", "&")
  define_bitop_special("bor", "0", "0", "|")
  define_bitop_special("bxor", "0", "0", "~")
  doc_special("lshift", {"x", "n"}, "Bitwise logical left shift of x by n bits.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
  doc_special("rshift", {"x", "n"}, "Bitwise logical right shift of x by n bits.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
  doc_special("band", {"x1", "x2", "..."}, "Bitwise AND of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
  doc_special("bor", {"x1", "x2", "..."}, "Bitwise OR of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
  doc_special("bxor", {"x1", "x2", "..."}, "Bitwise XOR of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
  doc_special("..", {"a", "b", "..."}, "String concatenation operator; works the same as Lua but accepts more arguments.")
  local function native_comparator(op, _544_, scope, parent)
    local _arg_545_ = _544_
    local _ = _arg_545_[1]
    local lhs_ast = _arg_545_[2]
    local rhs_ast = _arg_545_[3]
    local _let_546_ = compiler.compile1(lhs_ast, scope, parent, {nval = 1})
    local lhs = _let_546_[1]
    local _let_547_ = compiler.compile1(rhs_ast, scope, parent, {nval = 1})
    local rhs = _let_547_[1]
    return string.format("(%s %s %s)", tostring(lhs), op, tostring(rhs))
  end
  local function idempotent_comparator(op, chain_op, ast, scope, parent)
    local vals
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for i = 2, #ast do
        local val_18_auto = tostring((compiler.compile1(ast[i], scope, parent, {nval = 1}))[1])
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      vals = tbl_16_auto
    end
    local comparisons
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for i = 1, (#vals - 1) do
        local val_18_auto = string.format("(%s %s %s)", vals[i], op, vals[(i + 1)])
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      comparisons = tbl_16_auto
    end
    local chain = string.format(" %s ", (chain_op or "and"))
    return table.concat(comparisons, chain)
  end
  local function double_eval_protected_comparator(op, chain_op, ast, scope, parent)
    local arglist = {}
    local comparisons = {}
    local vals = {}
    local chain = string.format(" %s ", (chain_op or "and"))
    for i = 2, #ast do
      table.insert(arglist, tostring(compiler.gensym(scope)))
      table.insert(vals, tostring((compiler.compile1(ast[i], scope, parent, {nval = 1}))[1]))
    end
    do
      local tbl_16_auto = comparisons
      local i_17_auto = #tbl_16_auto
      for i = 1, (#arglist - 1) do
        local val_18_auto = string.format("(%s %s %s)", arglist[i], op, arglist[(i + 1)])
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
    end
    return string.format("(function(%s) return %s end)(%s)", table.concat(arglist, ","), table.concat(comparisons, chain), table.concat(vals, ","))
  end
  local function define_comparator_special(name, _3flua_op, _3fchain_op)
    do
      local op = (_3flua_op or name)
      local function opfn(ast, scope, parent)
        compiler.assert((2 < #ast), "expected at least two arguments", ast)
        if (3 == #ast) then
          return native_comparator(op, ast, scope, parent)
        elseif utils["every?"](utils["idempotent-expr?"], {unpack(ast, 2)}) then
          return idempotent_comparator(op, _3fchain_op, ast, scope, parent)
        else
          return double_eval_protected_comparator(op, _3fchain_op, ast, scope, parent)
        end
      end
      SPECIALS[name] = opfn
    end
    return doc_special(name, {"a", "b", "..."}, "Comparison operator; works the same as Lua but accepts more arguments.")
  end
  define_comparator_special(">")
  define_comparator_special("<")
  define_comparator_special(">=")
  define_comparator_special("<=")
  define_comparator_special("=", "==")
  define_comparator_special("not=", "~=", "or")
  local function define_unary_special(op, _3frealop)
    local function opfn(ast, scope, parent)
      compiler.assert((#ast == 2), "expected one argument", ast)
      local tail = compiler.compile1(ast[2], scope, parent, {nval = 1})
      return ((_3frealop or op) .. tostring(tail[1]))
    end
    SPECIALS[op] = opfn
    return nil
  end
  define_unary_special("not", "not ")
  doc_special("not", {"x"}, "Logical operator; works the same as Lua.")
  define_unary_special("bnot", "~")
  doc_special("bnot", {"x"}, "Bitwise negation; only works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
  define_unary_special("length", "#")
  doc_special("length", {"x"}, "Returns the length of a table or string.")
  do end (SPECIALS)["~="] = SPECIALS["not="]
  SPECIALS["#"] = SPECIALS.length
  SPECIALS.quote = function(ast, scope, parent)
    compiler.assert((#ast == 2), "expected one argument", ast)
    local runtime, this_scope = true, scope
    while this_scope do
      this_scope = this_scope.parent
      if (this_scope == compiler.scopes.compiler) then
        runtime = false
      else
      end
    end
    return compiler["do-quote"](ast[2], scope, parent, runtime)
  end
  doc_special("quote", {"x"}, "Quasiquote the following form. Only works in macro/compiler scope.")
  local macro_loaded = {}
  local function safe_getmetatable(tbl)
    local mt = getmetatable(tbl)
    assert((mt ~= getmetatable("")), "Illegal metatable access!")
    return mt
  end
  local safe_require = nil
  local function safe_compiler_env()
    local _554_
    do
      local _553_ = rawget(_G, "utf8")
      if (nil ~= _553_) then
        _554_ = utils.copy(_553_)
      else
        _554_ = _553_
      end
    end
    return {table = utils.copy(table), math = utils.copy(math), string = utils.copy(string), pairs = utils.stablepairs, ipairs = ipairs, select = select, tostring = tostring, tonumber = tonumber, bit = rawget(_G, "bit"), pcall = pcall, xpcall = xpcall, next = next, print = print, type = type, assert = assert, error = error, setmetatable = setmetatable, getmetatable = safe_getmetatable, require = safe_require, rawlen = rawget(_G, "rawlen"), rawget = rawget, rawset = rawset, rawequal = rawequal, _VERSION = _VERSION, utf8 = _554_}
  end
  local function combined_mt_pairs(env)
    local combined = {}
    local _let_556_ = getmetatable(env)
    local __index = _let_556_["__index"]
    if ("table" == type(__index)) then
      for k, v in pairs(__index) do
        combined[k] = v
      end
    else
    end
    for k, v in next, env, nil do
      combined[k] = v
    end
    return next, combined, nil
  end
  local function make_compiler_env(ast, scope, parent, _3fopts)
    local provided
    do
      local _558_ = (_3fopts or utils.root.options)
      if ((_G.type(_558_) == "table") and ((_558_)["compiler-env"] == "strict")) then
        provided = safe_compiler_env()
      elseif ((_G.type(_558_) == "table") and (nil ~= (_558_).compilerEnv)) then
        local compilerEnv = (_558_).compilerEnv
        provided = compilerEnv
      elseif ((_G.type(_558_) == "table") and (nil ~= (_558_)["compiler-env"])) then
        local compiler_env = (_558_)["compiler-env"]
        provided = compiler_env
      elseif true then
        local _ = _558_
        provided = safe_compiler_env(false)
      else
        provided = nil
      end
    end
    local env
    local function _560_(base)
      return utils.sym(compiler.gensym((compiler.scopes.macro or scope), base))
    end
    local function _561_()
      return compiler.scopes.macro
    end
    local function _562_(symbol)
      compiler.assert(compiler.scopes.macro, "must call from macro", ast)
      return compiler.scopes.macro.manglings[tostring(symbol)]
    end
    local function _563_(form)
      compiler.assert(compiler.scopes.macro, "must call from macro", ast)
      return compiler.macroexpand(form, compiler.scopes.macro)
    end
    env = {_AST = ast, _CHUNK = parent, _IS_COMPILER = true, _SCOPE = scope, _SPECIALS = compiler.scopes.global.specials, _VARARG = utils.varg(), ["macro-loaded"] = macro_loaded, unpack = unpack, ["assert-compile"] = compiler.assert, view = view, version = utils.version, metadata = compiler.metadata, ["ast-source"] = utils["ast-source"], list = utils.list, ["list?"] = utils["list?"], ["table?"] = utils["table?"], sequence = utils.sequence, ["sequence?"] = utils["sequence?"], sym = utils.sym, ["sym?"] = utils["sym?"], ["multi-sym?"] = utils["multi-sym?"], comment = utils.comment, ["comment?"] = utils["comment?"], ["varg?"] = utils["varg?"], gensym = _560_, ["get-scope"] = _561_, ["in-scope?"] = _562_, macroexpand = _563_}
    env._G = env
    return setmetatable(env, {__index = provided, __newindex = provided, __pairs = combined_mt_pairs})
  end
  local function _565_(...)
    local tbl_16_auto = {}
    local i_17_auto = #tbl_16_auto
    for c in string.gmatch((package.config or ""), "([^\n]+)") do
      local val_18_auto = c
      if (nil ~= val_18_auto) then
        i_17_auto = (i_17_auto + 1)
        do end (tbl_16_auto)[i_17_auto] = val_18_auto
      else
      end
    end
    return tbl_16_auto
  end
  local _local_564_ = _565_(...)
  local dirsep = _local_564_[1]
  local pathsep = _local_564_[2]
  local pathmark = _local_564_[3]
  local pkg_config = {dirsep = (dirsep or "/"), pathmark = (pathmark or ";"), pathsep = (pathsep or "?")}
  local function escapepat(str)
    return string.gsub(str, "[^%w]", "%%%1")
  end
  local function search_module(modulename, _3fpathstring)
    local pathsepesc = escapepat(pkg_config.pathsep)
    local pattern = ("([^%s]*)%s"):format(pathsepesc, pathsepesc)
    local no_dot_module = modulename:gsub("%.", pkg_config.dirsep)
    local fullpath = ((_3fpathstring or utils["fennel-module"].path) .. pkg_config.pathsep)
    local function try_path(path)
      local filename = path:gsub(escapepat(pkg_config.pathmark), no_dot_module)
      local filename2 = path:gsub(escapepat(pkg_config.pathmark), modulename)
      local _567_ = (io.open(filename) or io.open(filename2))
      if (nil ~= _567_) then
        local file = _567_
        file:close()
        return filename
      elseif true then
        local _ = _567_
        return nil, ("no file '" .. filename .. "'")
      else
        return nil
      end
    end
    local function find_in_path(start, _3ftried_paths)
      local _569_ = fullpath:match(pattern, start)
      if (nil ~= _569_) then
        local path = _569_
        local _570_, _571_ = try_path(path)
        if (nil ~= _570_) then
          local filename = _570_
          return filename
        elseif ((_570_ == nil) and (nil ~= _571_)) then
          local error = _571_
          local function _573_()
            local _572_ = (_3ftried_paths or {})
            table.insert(_572_, error)
            return _572_
          end
          return find_in_path((start + #path + 1), _573_())
        else
          return nil
        end
      elseif true then
        local _ = _569_
        local function _575_()
          local tried_paths = table.concat((_3ftried_paths or {}), "\n\9")
          if (_VERSION < "Lua 5.4") then
            return ("\n\9" .. tried_paths)
          else
            return tried_paths
          end
        end
        return nil, _575_()
      else
        return nil
      end
    end
    return find_in_path(1)
  end
  local function make_searcher(_3foptions)
    local function _578_(module_name)
      local opts = utils.copy(utils.root.options)
      for k, v in pairs((_3foptions or {})) do
        opts[k] = v
      end
      opts["module-name"] = module_name
      local _579_, _580_ = search_module(module_name)
      if (nil ~= _579_) then
        local filename = _579_
        local _583_
        do
          local _581_ = filename
          local _582_ = opts
          local function _584_(...)
            return utils["fennel-module"].dofile(_581_, _582_, ...)
          end
          _583_ = _584_
        end
        return _583_, filename
      elseif ((_579_ == nil) and (nil ~= _580_)) then
        local error = _580_
        return error
      else
        return nil
      end
    end
    return _578_
  end
  local function dofile_with_searcher(fennel_macro_searcher, filename, opts, ...)
    local searchers = (package.loaders or package.searchers or {})
    local _ = table.insert(searchers, 1, fennel_macro_searcher)
    local m = utils["fennel-module"].dofile(filename, opts, ...)
    table.remove(searchers, 1)
    return m
  end
  local function fennel_macro_searcher(module_name)
    local opts
    do
      local _586_ = utils.copy(utils.root.options)
      do end (_586_)["module-name"] = module_name
      _586_["env"] = "_COMPILER"
      _586_["requireAsInclude"] = false
      _586_["allowedGlobals"] = nil
      opts = _586_
    end
    local _587_ = search_module(module_name, utils["fennel-module"]["macro-path"])
    if (nil ~= _587_) then
      local filename = _587_
      local _588_
      if (opts["compiler-env"] == _G) then
        local _589_ = fennel_macro_searcher
        local _590_ = filename
        local _591_ = opts
        local function _593_(...)
          return dofile_with_searcher(_589_, _590_, _591_, ...)
        end
        _588_ = _593_
      else
        local _594_ = filename
        local _595_ = opts
        local function _597_(...)
          return utils["fennel-module"].dofile(_594_, _595_, ...)
        end
        _588_ = _597_
      end
      return _588_, filename
    else
      return nil
    end
  end
  local function lua_macro_searcher(module_name)
    local _600_ = search_module(module_name, package.path)
    if (nil ~= _600_) then
      local filename = _600_
      local code
      do
        local f = io.open(filename)
        local function close_handlers_8_auto(ok_9_auto, ...)
          f:close()
          if ok_9_auto then
            return ...
          else
            return error(..., 0)
          end
        end
        local function _602_()
          return assert(f:read("*a"))
        end
        code = close_handlers_8_auto(_G.xpcall(_602_, (package.loaded.fennel or debug).traceback))
      end
      local chunk = load_code(code, make_compiler_env(), filename)
      return chunk, filename
    else
      return nil
    end
  end
  local macro_searchers = {fennel_macro_searcher, lua_macro_searcher}
  local function search_macro_module(modname, n)
    local _604_ = macro_searchers[n]
    if (nil ~= _604_) then
      local f = _604_
      local _605_, _606_ = f(modname)
      if ((nil ~= _605_) and true) then
        local loader = _605_
        local _3ffilename = _606_
        return loader, _3ffilename
      elseif true then
        local _ = _605_
        return search_macro_module(modname, (n + 1))
      else
        return nil
      end
    else
      return nil
    end
  end
  local function sandbox_fennel_module(modname)
    if ((modname == "fennel.macros") or (package and package.loaded and ("table" == type(package.loaded[modname])) and (package.loaded[modname].metadata == compiler.metadata))) then
      return {metadata = compiler.metadata, view = view}
    else
      return nil
    end
  end
  local function _610_(modname)
    local function _611_()
      local loader, filename = search_macro_module(modname, 1)
      compiler.assert(loader, (modname .. " module not found."))
      do end (macro_loaded)[modname] = loader(modname, filename)
      return macro_loaded[modname]
    end
    return (macro_loaded[modname] or sandbox_fennel_module(modname) or _611_())
  end
  safe_require = _610_
  local function add_macros(macros_2a, ast, scope)
    compiler.assert(utils["table?"](macros_2a), "expected macros to be table", ast)
    for k, v in pairs(macros_2a) do
      compiler.assert((type(v) == "function"), "expected each macro to be function", ast)
      compiler["check-binding-valid"](utils.sym(k), scope, ast, {["macro?"] = true})
      do end (scope.macros)[k] = v
    end
    return nil
  end
  local function resolve_module_name(_612_, _scope, _parent, opts)
    local _arg_613_ = _612_
    local filename = _arg_613_["filename"]
    local second = _arg_613_[2]
    local filename0 = (filename or (utils["table?"](second) and second.filename))
    local module_name = utils.root.options["module-name"]
    local modexpr = compiler.compile(second, opts)
    local modname_chunk = load_code(modexpr)
    return modname_chunk(module_name, filename0)
  end
  SPECIALS["require-macros"] = function(ast, scope, parent, _3freal_ast)
    compiler.assert((#ast == 2), "Expected one module name argument", (_3freal_ast or ast))
    local modname = resolve_module_name(ast, scope, parent, {})
    compiler.assert(utils["string?"](modname), "module name must compile to string", (_3freal_ast or ast))
    if not macro_loaded[modname] then
      local loader, filename = search_macro_module(modname, 1)
      compiler.assert(loader, (modname .. " module not found."), ast)
      do end (macro_loaded)[modname] = compiler.assert(utils["table?"](loader(modname, filename)), "expected macros to be table", (_3freal_ast or ast))
    else
    end
    if ("import-macros" == tostring(ast[1])) then
      return macro_loaded[modname]
    else
      return add_macros(macro_loaded[modname], ast, scope, parent)
    end
  end
  doc_special("require-macros", {"macro-module-name"}, "Load given module and use its contents as macro definitions in current scope.\nMacro module should return a table of macro functions with string keys.\nConsider using import-macros instead as it is more flexible.")
  local function emit_included_fennel(src, path, opts, sub_chunk)
    local subscope = compiler["make-scope"](utils.root.scope.parent)
    local forms = {}
    if utils.root.options.requireAsInclude then
      subscope.specials.require = compiler["require-include"]
    else
    end
    for _, val in parser.parser(parser["string-stream"](src), path) do
      table.insert(forms, val)
    end
    for i = 1, #forms do
      local subopts
      if (i == #forms) then
        subopts = {tail = true}
      else
        subopts = {nval = 0}
      end
      utils["propagate-options"](opts, subopts)
      compiler.compile1(forms[i], subscope, sub_chunk, subopts)
    end
    return nil
  end
  local function include_path(ast, opts, path, mod, fennel_3f)
    utils.root.scope.includes[mod] = "fnl/loading"
    local src
    do
      local f = assert(io.open(path))
      local function close_handlers_8_auto(ok_9_auto, ...)
        f:close()
        if ok_9_auto then
          return ...
        else
          return error(..., 0)
        end
      end
      local function _619_()
        return assert(f:read("*all")):gsub("[\13\n]*$", "")
      end
      src = close_handlers_8_auto(_G.xpcall(_619_, (package.loaded.fennel or debug).traceback))
    end
    local ret = utils.expr(("require(\"" .. mod .. "\")"), "statement")
    local target = ("package.preload[%q]"):format(mod)
    local preload_str = (target .. " = " .. target .. " or function(...)")
    local temp_chunk, sub_chunk = {}, {}
    compiler.emit(temp_chunk, preload_str, ast)
    compiler.emit(temp_chunk, sub_chunk)
    compiler.emit(temp_chunk, "end", ast)
    for _, v in ipairs(temp_chunk) do
      table.insert(utils.root.chunk, v)
    end
    if fennel_3f then
      emit_included_fennel(src, path, opts, sub_chunk)
    else
      compiler.emit(sub_chunk, src, ast)
    end
    utils.root.scope.includes[mod] = ret
    return ret
  end
  local function include_circular_fallback(mod, modexpr, fallback, ast)
    if (utils.root.scope.includes[mod] == "fnl/loading") then
      compiler.assert(fallback, "circular include detected", ast)
      return fallback(modexpr)
    else
      return nil
    end
  end
  SPECIALS.include = function(ast, scope, parent, opts)
    compiler.assert((#ast == 2), "expected one argument", ast)
    local modexpr
    do
      local _622_, _623_ = pcall(resolve_module_name, ast, scope, parent, opts)
      if ((_622_ == true) and (nil ~= _623_)) then
        local modname = _623_
        modexpr = utils.expr(string.format("%q", modname), "literal")
      elseif true then
        local _ = _622_
        modexpr = (compiler.compile1(ast[2], scope, parent, {nval = 1}))[1]
      else
        modexpr = nil
      end
    end
    if ((modexpr.type ~= "literal") or ((modexpr[1]):byte() ~= 34)) then
      if opts.fallback then
        return opts.fallback(modexpr)
      else
        return compiler.assert(false, "module name must be string literal", ast)
      end
    else
      local mod = load_code(("return " .. modexpr[1]))()
      local oldmod = utils.root.options["module-name"]
      local _
      utils.root.options["module-name"] = mod
      _ = nil
      local res
      local function _627_()
        local _626_ = search_module(mod)
        if (nil ~= _626_) then
          local fennel_path = _626_
          return include_path(ast, opts, fennel_path, mod, true)
        elseif true then
          local _0 = _626_
          local lua_path = search_module(mod, package.path)
          if lua_path then
            return include_path(ast, opts, lua_path, mod, false)
          elseif opts.fallback then
            return opts.fallback(modexpr)
          else
            return compiler.assert(false, ("module not found " .. mod), ast)
          end
        else
          return nil
        end
      end
      res = ((utils["member?"](mod, (utils.root.options.skipInclude or {})) and opts.fallback(modexpr, true)) or include_circular_fallback(mod, modexpr, opts.fallback, ast) or utils.root.scope.includes[mod] or _627_())
      utils.root.options["module-name"] = oldmod
      return res
    end
  end
  doc_special("include", {"module-name-literal"}, "Like require but load the target module during compilation and embed it in the\nLua output. The module must be a string literal and resolvable at compile time.")
  local function eval_compiler_2a(ast, scope, parent)
    local env = make_compiler_env(ast, scope, parent)
    local opts = utils.copy(utils.root.options)
    opts.scope = compiler["make-scope"](compiler.scopes.compiler)
    opts.allowedGlobals = current_global_names(env)
    return assert(load_code(compiler.compile(ast, opts), wrap_env(env)), opts["module-name"], ast.filename)()
  end
  SPECIALS.macros = function(ast, scope, parent)
    compiler.assert(((#ast == 2) and utils["table?"](ast[2])), "Expected one table argument", ast)
    return add_macros(eval_compiler_2a(ast[2], scope, parent), ast, scope, parent)
  end
  doc_special("macros", {"{:macro-name-1 (fn [...] ...) ... :macro-name-N macro-body-N}"}, "Define all functions in the given table as macros local to the current scope.")
  SPECIALS["eval-compiler"] = function(ast, scope, parent)
    local old_first = ast[1]
    ast[1] = utils.sym("do")
    local val = eval_compiler_2a(ast, scope, parent)
    do end (ast)[1] = old_first
    return val
  end
  doc_special("eval-compiler", {"..."}, "Evaluate the body at compile-time. Use the macro system instead if possible.", true)
  return {doc = doc_2a, ["current-global-names"] = current_global_names, ["load-code"] = load_code, ["macro-loaded"] = macro_loaded, ["macro-searchers"] = macro_searchers, ["make-compiler-env"] = make_compiler_env, ["search-module"] = search_module, ["make-searcher"] = make_searcher, ["wrap-env"] = wrap_env}
end
package.preload["fennel.compiler"] = package.preload["fennel.compiler"] or function(...)
  local utils = require("fennel.utils")
  local parser = require("fennel.parser")
  local friend = require("fennel.friend")
  local unpack = (table.unpack or _G.unpack)
  local scopes = {}
  local function make_scope(_3fparent)
    local parent = (_3fparent or scopes.global)
    local _268_
    if parent then
      _268_ = ((parent.depth or 0) + 1)
    else
      _268_ = 0
    end
    return {includes = setmetatable({}, {__index = (parent and parent.includes)}), macros = setmetatable({}, {__index = (parent and parent.macros)}), manglings = setmetatable({}, {__index = (parent and parent.manglings)}), specials = setmetatable({}, {__index = (parent and parent.specials)}), symmeta = setmetatable({}, {__index = (parent and parent.symmeta)}), unmanglings = setmetatable({}, {__index = (parent and parent.unmanglings)}), gensyms = setmetatable({}, {__index = (parent and parent.gensyms)}), autogensyms = setmetatable({}, {__index = (parent and parent.autogensyms)}), vararg = (parent and parent.vararg), depth = _268_, hashfn = (parent and parent.hashfn), refedglobals = {}, parent = parent}
  end
  local function assert_msg(ast, msg)
    local ast_tbl
    if ("table" == type(ast)) then
      ast_tbl = ast
    else
      ast_tbl = {}
    end
    local m = getmetatable(ast)
    local filename = ((m and m.filename) or ast_tbl.filename or "unknown")
    local line = ((m and m.line) or ast_tbl.line or "?")
    local col = ((m and m.col) or ast_tbl.col or "?")
    local target = tostring((utils["sym?"](ast_tbl[1]) or ast_tbl[1] or "()"))
    return string.format("%s:%s:%s Compile error in '%s': %s", filename, line, col, target, msg)
  end
  local function assert_compile(condition, msg, ast, _3ffallback_ast)
    if not condition then
      local _let_271_ = (utils.root.options or {})
      local source = _let_271_["source"]
      local unfriendly = _let_271_["unfriendly"]
      local error_pinpoint = _let_271_["error-pinpoint"]
      local ast0
      if next(utils["ast-source"](ast)) then
        ast0 = ast
      else
        ast0 = (_3ffallback_ast or {})
      end
      if (nil == utils.hook("assert-compile", condition, msg, ast0, utils.root.reset)) then
        utils.root.reset()
        if (unfriendly or not friend or not _G.io or not _G.io.read) then
          error(assert_msg(ast0, msg), 0)
        else
          friend["assert-compile"](condition, msg, ast0, source, {["error-pinpoint"] = error_pinpoint})
        end
      else
      end
    else
    end
    return condition
  end
  scopes.global = make_scope()
  scopes.global.vararg = true
  scopes.compiler = make_scope(scopes.global)
  scopes.macro = scopes.global
  local serialize_subst = {["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\n"] = "n", ["\11"] = "\\v", ["\12"] = "\\f"}
  local function serialize_string(str)
    local function _276_(_241)
      return ("\\" .. _241:byte())
    end
    return string.gsub(string.gsub(string.format("%q", str), ".", serialize_subst), "[\128-\255]", _276_)
  end
  local function global_mangling(str)
    if utils["valid-lua-identifier?"](str) then
      return str
    else
      local function _277_(_241)
        return string.format("_%02x", _241:byte())
      end
      return ("__fnl_global__" .. str:gsub("[^%w]", _277_))
    end
  end
  local function global_unmangling(identifier)
    local _279_ = string.match(identifier, "^__fnl_global__(.*)$")
    if (nil ~= _279_) then
      local rest = _279_
      local _280_
      local function _281_(_241)
        return string.char(tonumber(_241:sub(2), 16))
      end
      _280_ = string.gsub(rest, "_[%da-f][%da-f]", _281_)
      return _280_
    elseif true then
      local _ = _279_
      return identifier
    else
      return nil
    end
  end
  local allowed_globals = nil
  local function global_allowed_3f(name)
    return (not allowed_globals or utils["member?"](name, allowed_globals))
  end
  local function unique_mangling(original, mangling, scope, append)
    if (scope.unmanglings[mangling] and not scope.gensyms[mangling]) then
      return unique_mangling(original, (original .. append), scope, (append + 1))
    else
      return mangling
    end
  end
  local function local_mangling(str, scope, ast, _3ftemp_manglings)
    assert_compile(not utils["multi-sym?"](str), ("unexpected multi symbol " .. str), ast)
    local raw
    if ((utils["lua-keywords"])[str] or str:match("^%d")) then
      raw = ("_" .. str)
    else
      raw = str
    end
    local mangling
    local function _285_(_241)
      return string.format("_%02x", _241:byte())
    end
    mangling = string.gsub(string.gsub(raw, "-", "_"), "[^%w_]", _285_)
    local unique = unique_mangling(mangling, mangling, scope, 0)
    do end (scope.unmanglings)[unique] = str
    do
      local manglings = (_3ftemp_manglings or scope.manglings)
      do end (manglings)[str] = unique
    end
    return unique
  end
  local function apply_manglings(scope, new_manglings, ast)
    for raw, mangled in pairs(new_manglings) do
      assert_compile(not scope.refedglobals[mangled], ("use of global " .. raw .. " is aliased by a local"), ast)
      do end (scope.manglings)[raw] = mangled
    end
    return nil
  end
  local function combine_parts(parts, scope)
    local ret = (scope.manglings[parts[1]] or global_mangling(parts[1]))
    for i = 2, #parts do
      if utils["valid-lua-identifier?"](parts[i]) then
        if (parts["multi-sym-method-call"] and (i == #parts)) then
          ret = (ret .. ":" .. parts[i])
        else
          ret = (ret .. "." .. parts[i])
        end
      else
        ret = (ret .. "[" .. serialize_string(parts[i]) .. "]")
      end
    end
    return ret
  end
  local function next_append()
    utils.root.scope["gensym-append"] = ((utils.root.scope["gensym-append"] or 0) + 1)
    return ("_" .. utils.root.scope["gensym-append"] .. "_")
  end
  local function gensym(scope, _3fbase, _3fsuffix)
    local mangling = ((_3fbase or "") .. next_append() .. (_3fsuffix or ""))
    while scope.unmanglings[mangling] do
      mangling = ((_3fbase or "") .. next_append() .. (_3fsuffix or ""))
    end
    scope.unmanglings[mangling] = (_3fbase or true)
    do end (scope.gensyms)[mangling] = true
    return mangling
  end
  local function combine_auto_gensym(parts, first)
    parts[1] = first
    local last = table.remove(parts)
    local last2 = table.remove(parts)
    local last_joiner = ((parts["multi-sym-method-call"] and ":") or ".")
    table.insert(parts, (last2 .. last_joiner .. last))
    return table.concat(parts, ".")
  end
  local function autogensym(base, scope)
    local _288_ = utils["multi-sym?"](base)
    if (nil ~= _288_) then
      local parts = _288_
      return combine_auto_gensym(parts, autogensym(parts[1], scope))
    elseif true then
      local _ = _288_
      local function _289_()
        local mangling = gensym(scope, base:sub(1, ( - 2)), "auto")
        do end (scope.autogensyms)[base] = mangling
        return mangling
      end
      return (scope.autogensyms[base] or _289_())
    else
      return nil
    end
  end
  local function check_binding_valid(symbol, scope, ast, _3fopts)
    local name = tostring(symbol)
    local macro_3f
    do
      local t_291_ = _3fopts
      if (nil ~= t_291_) then
        t_291_ = (t_291_)["macro?"]
      else
      end
      macro_3f = t_291_
    end
    assert_compile(not name:find("&"), "invalid character: &", symbol)
    assert_compile(not name:find("^%."), "invalid character: .", symbol)
    assert_compile(not (scope.specials[name] or (not macro_3f and scope.macros[name])), ("local %s was overshadowed by a special form or macro"):format(name), ast)
    return assert_compile(not utils["quoted?"](symbol), string.format("macro tried to bind %s without gensym", name), symbol)
  end
  local function declare_local(symbol, meta, scope, ast, _3ftemp_manglings)
    check_binding_valid(symbol, scope, ast)
    local name = tostring(symbol)
    assert_compile(not utils["multi-sym?"](name), ("unexpected multi symbol " .. name), ast)
    do end (scope.symmeta)[name] = meta
    return local_mangling(name, scope, ast, _3ftemp_manglings)
  end
  local function hashfn_arg_name(name, multi_sym_parts, scope)
    if not scope.hashfn then
      return nil
    elseif (name == "$") then
      return "$1"
    elseif multi_sym_parts then
      if (multi_sym_parts and (multi_sym_parts[1] == "$")) then
        multi_sym_parts[1] = "$1"
      else
      end
      return table.concat(multi_sym_parts, ".")
    else
      return nil
    end
  end
  local function symbol_to_expression(symbol, scope, _3freference_3f)
    utils.hook("symbol-to-expression", symbol, scope, _3freference_3f)
    local name = symbol[1]
    local multi_sym_parts = utils["multi-sym?"](name)
    local name0 = (hashfn_arg_name(name, multi_sym_parts, scope) or name)
    local parts = (multi_sym_parts or {name0})
    local etype = (((1 < #parts) and "expression") or "sym")
    local local_3f = scope.manglings[parts[1]]
    if (local_3f and scope.symmeta[parts[1]]) then
      scope.symmeta[parts[1]]["used"] = true
    else
    end
    assert_compile(not scope.macros[parts[1]], "tried to reference a macro without calling it", symbol)
    assert_compile((not scope.specials[parts[1]] or ("require" == parts[1])), "tried to reference a special form without calling it", symbol)
    assert_compile((not _3freference_3f or local_3f or ("_ENV" == parts[1]) or global_allowed_3f(parts[1])), ("unknown identifier: " .. tostring(parts[1])), symbol)
    if (allowed_globals and not local_3f and scope.parent) then
      scope.parent.refedglobals[parts[1]] = true
    else
    end
    return utils.expr(combine_parts(parts, scope), etype)
  end
  local function emit(chunk, out, _3fast)
    if (type(out) == "table") then
      return table.insert(chunk, out)
    else
      return table.insert(chunk, {ast = _3fast, leaf = out})
    end
  end
  local function peephole(chunk)
    if chunk.leaf then
      return chunk
    elseif ((3 <= #chunk) and (chunk[(#chunk - 2)].leaf == "do") and not chunk[(#chunk - 1)].leaf and (chunk[#chunk].leaf == "end")) then
      local kid = peephole(chunk[(#chunk - 1)])
      local new_chunk = {ast = chunk.ast}
      for i = 1, (#chunk - 3) do
        table.insert(new_chunk, peephole(chunk[i]))
      end
      for i = 1, #kid do
        table.insert(new_chunk, kid[i])
      end
      return new_chunk
    else
      return utils.map(chunk, peephole)
    end
  end
  local function flatten_chunk_correlated(main_chunk, options)
    local function flatten(chunk, out, last_line, file)
      local last_line0 = last_line
      if chunk.leaf then
        out[last_line0] = ((out[last_line0] or "") .. " " .. chunk.leaf)
      else
        for _, subchunk in ipairs(chunk) do
          if (subchunk.leaf or (0 < #subchunk)) then
            local source = utils["ast-source"](subchunk.ast)
            if (file == source.filename) then
              last_line0 = math.max(last_line0, (source.line or 0))
            else
            end
            last_line0 = flatten(subchunk, out, last_line0, file)
          else
          end
        end
      end
      return last_line0
    end
    local out = {}
    local last = flatten(main_chunk, out, 1, options.filename)
    for i = 1, last do
      if (out[i] == nil) then
        out[i] = ""
      else
      end
    end
    return table.concat(out, "\n")
  end
  local function flatten_chunk(file_sourcemap, chunk, tab, depth)
    if chunk.leaf then
      local _let_303_ = utils["ast-source"](chunk.ast)
      local filename = _let_303_["filename"]
      local line = _let_303_["line"]
      table.insert(file_sourcemap, {filename, line})
      return chunk.leaf
    else
      local tab0
      do
        local _304_ = tab
        if (_304_ == true) then
          tab0 = "  "
        elseif (_304_ == false) then
          tab0 = ""
        elseif (_304_ == tab) then
          tab0 = tab
        elseif (_304_ == nil) then
          tab0 = ""
        else
          tab0 = nil
        end
      end
      local function parter(c)
        if (c.leaf or (0 < #c)) then
          local sub = flatten_chunk(file_sourcemap, c, tab0, (depth + 1))
          if (0 < depth) then
            return (tab0 .. sub:gsub("\n", ("\n" .. tab0)))
          else
            return sub
          end
        else
          return nil
        end
      end
      return table.concat(utils.map(chunk, parter), "\n")
    end
  end
  local sourcemap = {}
  local function make_short_src(source)
    local source0 = source:gsub("\n", " ")
    if (#source0 <= 49) then
      return ("[fennel \"" .. source0 .. "\"]")
    else
      return ("[fennel \"" .. source0:sub(1, 46) .. "...\"]")
    end
  end
  local function flatten(chunk, options)
    local chunk0 = peephole(chunk)
    if options.correlate then
      return flatten_chunk_correlated(chunk0, options), {}
    else
      local file_sourcemap = {}
      local src = flatten_chunk(file_sourcemap, chunk0, options.indent, 0)
      file_sourcemap.short_src = (options.filename or make_short_src((options.source or src)))
      if options.filename then
        file_sourcemap.key = ("@" .. options.filename)
      else
        file_sourcemap.key = src
      end
      sourcemap[file_sourcemap.key] = file_sourcemap
      return src, file_sourcemap
    end
  end
  local function make_metadata()
    local function _312_(self, tgt, key)
      if self[tgt] then
        return self[tgt][key]
      else
        return nil
      end
    end
    local function _314_(self, tgt, key, value)
      self[tgt] = (self[tgt] or {})
      do end (self[tgt])[key] = value
      return tgt
    end
    local function _315_(self, tgt, ...)
      local kv_len = select("#", ...)
      local kvs = {...}
      if ((kv_len % 2) ~= 0) then
        error("metadata:setall() expected even number of k/v pairs")
      else
      end
      self[tgt] = (self[tgt] or {})
      for i = 1, kv_len, 2 do
        self[tgt][kvs[i]] = kvs[(i + 1)]
      end
      return tgt
    end
    return setmetatable({}, {__index = {get = _312_, set = _314_, setall = _315_}, __mode = "k"})
  end
  local function exprs1(exprs)
    return table.concat(utils.map(exprs, tostring), ", ")
  end
  local function keep_side_effects(exprs, chunk, start, ast)
    local start0 = (start or 1)
    for j = start0, #exprs do
      local se = exprs[j]
      if ((se.type == "expression") and (se[1] ~= "nil")) then
        emit(chunk, string.format("do local _ = %s end", tostring(se)), ast)
      elseif (se.type == "statement") then
        local code = tostring(se)
        local disambiguated
        if (code:byte() == 40) then
          disambiguated = ("do end " .. code)
        else
          disambiguated = code
        end
        emit(chunk, disambiguated, ast)
      else
      end
    end
    return nil
  end
  local function handle_compile_opts(exprs, parent, opts, ast)
    if opts.nval then
      local n = opts.nval
      local len = #exprs
      if (n ~= len) then
        if (n < len) then
          keep_side_effects(exprs, parent, (n + 1), ast)
          for i = (n + 1), len do
            exprs[i] = nil
          end
        else
          for i = (#exprs + 1), n do
            exprs[i] = utils.expr("nil", "literal")
          end
        end
      else
      end
    else
    end
    if opts.tail then
      emit(parent, string.format("return %s", exprs1(exprs)), ast)
    else
    end
    if opts.target then
      local result = exprs1(exprs)
      local function _323_()
        if (result == "") then
          return "nil"
        else
          return result
        end
      end
      emit(parent, string.format("%s = %s", opts.target, _323_()), ast)
    else
    end
    if (opts.tail or opts.target) then
      return {returned = true}
    else
      local _325_ = exprs
      _325_["returned"] = true
      return _325_
    end
  end
  local function find_macro(ast, scope)
    local macro_2a
    do
      local _327_ = utils["sym?"](ast[1])
      if (_327_ ~= nil) then
        local _328_ = tostring(_327_)
        if (_328_ ~= nil) then
          macro_2a = scope.macros[_328_]
        else
          macro_2a = _328_
        end
      else
        macro_2a = _327_
      end
    end
    local multi_sym_parts = utils["multi-sym?"](ast[1])
    if (not macro_2a and multi_sym_parts) then
      local nested_macro = utils["get-in"](scope.macros, multi_sym_parts)
      assert_compile((not scope.macros[multi_sym_parts[1]] or (type(nested_macro) == "function")), "macro not found in imported macro module", ast)
      return nested_macro
    else
      return macro_2a
    end
  end
  local function propagate_trace_info(_332_, _index, node)
    local _arg_333_ = _332_
    local filename = _arg_333_["filename"]
    local line = _arg_333_["line"]
    local bytestart = _arg_333_["bytestart"]
    local byteend = _arg_333_["byteend"]
    do
      local src = utils["ast-source"](node)
      if (("table" == type(node)) and (filename ~= src.filename)) then
        src.filename, src.line, src["from-macro?"] = filename, line, true
        src.bytestart, src.byteend = bytestart, byteend
      else
      end
    end
    return ("table" == type(node))
  end
  local function quote_literal_nils(index, node, parent)
    if (parent and utils["list?"](parent)) then
      for i = 1, utils.maxn(parent) do
        local _335_ = parent[i]
        if (_335_ == nil) then
          parent[i] = utils.sym("nil")
        else
        end
      end
    else
    end
    return index, node, parent
  end
  local function comp(f, g)
    local function _338_(...)
      return f(g(...))
    end
    return _338_
  end
  local function built_in_3f(m)
    local found_3f = false
    for _, f in pairs(scopes.global.macros) do
      if found_3f then break end
      found_3f = (f == m)
    end
    return found_3f
  end
  local function macroexpand_2a(ast, scope, _3fonce)
    local _339_
    if utils["list?"](ast) then
      _339_ = find_macro(ast, scope)
    else
      _339_ = nil
    end
    if (_339_ == false) then
      return ast
    elseif (nil ~= _339_) then
      local macro_2a = _339_
      local old_scope = scopes.macro
      local _
      scopes.macro = scope
      _ = nil
      local ok, transformed = nil, nil
      local function _341_()
        return macro_2a(unpack(ast, 2))
      end
      local function _342_()
        if built_in_3f(macro_2a) then
          return tostring
        else
          return debug.traceback
        end
      end
      ok, transformed = xpcall(_341_, _342_())
      local _344_
      do
        local _343_ = ast
        local function _345_(...)
          return propagate_trace_info(_343_, ...)
        end
        _344_ = _345_
      end
      utils["walk-tree"](transformed, comp(_344_, quote_literal_nils))
      scopes.macro = old_scope
      assert_compile(ok, transformed, ast)
      if (_3fonce or not transformed) then
        return transformed
      else
        return macroexpand_2a(transformed, scope)
      end
    elseif true then
      local _ = _339_
      return ast
    else
      return nil
    end
  end
  local function compile_special(ast, scope, parent, opts, special)
    local exprs = (special(ast, scope, parent, opts) or utils.expr("nil", "literal"))
    local exprs0
    if ("table" ~= type(exprs)) then
      exprs0 = utils.expr(exprs, "expression")
    else
      exprs0 = exprs
    end
    local exprs2
    if utils["expr?"](exprs0) then
      exprs2 = {exprs0}
    else
      exprs2 = exprs0
    end
    if not exprs2.returned then
      return handle_compile_opts(exprs2, parent, opts, ast)
    elseif (opts.tail or opts.target) then
      return {returned = true}
    else
      return exprs2
    end
  end
  local function compile_function_call(ast, scope, parent, opts, compile1, len)
    local fargs = {}
    local fcallee = (compile1(ast[1], scope, parent, {nval = 1}))[1]
    assert_compile((utils["sym?"](ast[1]) or utils["list?"](ast[1]) or ("string" == type(ast[1]))), ("cannot call literal value " .. tostring(ast[1])), ast)
    for i = 2, len do
      local subexprs
      local _351_
      if (i ~= len) then
        _351_ = 1
      else
        _351_ = nil
      end
      subexprs = compile1(ast[i], scope, parent, {nval = _351_})
      table.insert(fargs, subexprs[1])
      if (i == len) then
        for j = 2, #subexprs do
          table.insert(fargs, subexprs[j])
        end
      else
        keep_side_effects(subexprs, parent, 2, ast[i])
      end
    end
    local pat
    if ("string" == type(ast[1])) then
      pat = "(%s)(%s)"
    else
      pat = "%s(%s)"
    end
    local call = string.format(pat, tostring(fcallee), exprs1(fargs))
    return handle_compile_opts({utils.expr(call, "statement")}, parent, opts, ast)
  end
  local function compile_call(ast, scope, parent, opts, compile1)
    utils.hook("call", ast, scope)
    local len = #ast
    local first = ast[1]
    local multi_sym_parts = utils["multi-sym?"](first)
    local special = (utils["sym?"](first) and scope.specials[tostring(first)])
    assert_compile((0 < len), "expected a function, macro, or special to call", ast)
    if special then
      return compile_special(ast, scope, parent, opts, special)
    elseif (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]) then
      local table_with_method = table.concat({unpack(multi_sym_parts, 1, (#multi_sym_parts - 1))}, ".")
      local method_to_call = multi_sym_parts[#multi_sym_parts]
      local new_ast = utils.list(utils.sym(":", ast), utils.sym(table_with_method, ast), method_to_call, select(2, unpack(ast)))
      return compile1(new_ast, scope, parent, opts)
    else
      return compile_function_call(ast, scope, parent, opts, compile1, len)
    end
  end
  local function compile_varg(ast, scope, parent, opts)
    local _356_
    if scope.hashfn then
      _356_ = "use $... in hashfn"
    else
      _356_ = "unexpected vararg"
    end
    assert_compile(scope.vararg, _356_, ast)
    return handle_compile_opts({utils.expr("...", "varg")}, parent, opts, ast)
  end
  local function compile_sym(ast, scope, parent, opts)
    local multi_sym_parts = utils["multi-sym?"](ast)
    assert_compile(not (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]), "multisym method calls may only be in call position", ast)
    local e
    if (ast[1] == "nil") then
      e = utils.expr("nil", "literal")
    else
      e = symbol_to_expression(ast, scope, true)
    end
    return handle_compile_opts({e}, parent, opts, ast)
  end
  local function serialize_number(n)
    local _359_ = string.gsub(tostring(n), ",", ".")
    return _359_
  end
  local function compile_scalar(ast, _scope, parent, opts)
    local serialize
    do
      local _360_ = type(ast)
      if (_360_ == "nil") then
        serialize = tostring
      elseif (_360_ == "boolean") then
        serialize = tostring
      elseif (_360_ == "string") then
        serialize = serialize_string
      elseif (_360_ == "number") then
        serialize = serialize_number
      else
        serialize = nil
      end
    end
    return handle_compile_opts({utils.expr(serialize(ast), "literal")}, parent, opts)
  end
  local function compile_table(ast, scope, parent, opts, compile1)
    local function escape_key(k)
      if ((type(k) == "string") and utils["valid-lua-identifier?"](k)) then
        return k
      else
        local _let_362_ = compile1(k, scope, parent, {nval = 1})
        local compiled = _let_362_[1]
        return ("[" .. tostring(compiled) .. "]")
      end
    end
    local keys = {}
    local buffer
    do
      local tbl_16_auto = {}
      local i_17_auto = #tbl_16_auto
      for i, elem in ipairs(ast) do
        local val_18_auto
        do
          local nval = ((nil ~= ast[(i + 1)]) and 1)
          do end (keys)[i] = true
          val_18_auto = exprs1(compile1(elem, scope, parent, {nval = nval}))
        end
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
      buffer = tbl_16_auto
    end
    do
      local tbl_16_auto = buffer
      local i_17_auto = #tbl_16_auto
      for k, v in utils.stablepairs(ast) do
        local val_18_auto
        if not keys[k] then
          local _let_365_ = compile1(ast[k], scope, parent, {nval = 1})
          local v0 = _let_365_[1]
          val_18_auto = string.format("%s = %s", escape_key(k), tostring(v0))
        else
          val_18_auto = nil
        end
        if (nil ~= val_18_auto) then
          i_17_auto = (i_17_auto + 1)
          do end (tbl_16_auto)[i_17_auto] = val_18_auto
        else
        end
      end
    end
    return handle_compile_opts({utils.expr(("{" .. table.concat(buffer, ", ") .. "}"), "expression")}, parent, opts, ast)
  end
  local function compile1(ast, scope, parent, _3fopts)
    local opts = (_3fopts or {})
    local ast0 = macroexpand_2a(ast, scope)
    if utils["list?"](ast0) then
      return compile_call(ast0, scope, parent, opts, compile1)
    elseif utils["varg?"](ast0) then
      return compile_varg(ast0, scope, parent, opts)
    elseif utils["sym?"](ast0) then
      return compile_sym(ast0, scope, parent, opts)
    elseif (type(ast0) == "table") then
      return compile_table(ast0, scope, parent, opts, compile1)
    elseif ((type(ast0) == "nil") or (type(ast0) == "boolean") or (type(ast0) == "number") or (type(ast0) == "string")) then
      return compile_scalar(ast0, scope, parent, opts)
    else
      return assert_compile(false, ("could not compile value of type " .. type(ast0)), ast0)
    end
  end
  local function destructure(to, from, ast, scope, parent, opts)
    local opts0 = (opts or {})
    local _let_369_ = opts0
    local isvar = _let_369_["isvar"]
    local declaration = _let_369_["declaration"]
    local forceglobal = _let_369_["forceglobal"]
    local forceset = _let_369_["forceset"]
    local symtype = _let_369_["symtype"]
    local symtype0 = ("_" .. (symtype or "dst"))
    local setter
    if declaration then
      setter = "local %s = %s"
    else
      setter = "%s = %s"
    end
    local new_manglings = {}
    local function getname(symbol, up1)
      local raw = symbol[1]
      assert_compile(not (opts0.nomulti and utils["multi-sym?"](raw)), ("unexpected multi symbol " .. raw), up1)
      if declaration then
        return declare_local(symbol, nil, scope, symbol, new_manglings)
      else
        local parts = (utils["multi-sym?"](raw) or {raw})
        local meta = scope.symmeta[parts[1]]
        assert_compile(not raw:find(":"), "cannot set method sym", symbol)
        if ((#parts == 1) and not forceset) then
          assert_compile(not (forceglobal and meta), string.format("global %s conflicts with local", tostring(symbol)), symbol)
          assert_compile(not (meta and not meta.var), ("expected var " .. raw), symbol)
        else
        end
        assert_compile((meta or not opts0.noundef or global_allowed_3f(parts[1])), ("expected local " .. parts[1]), symbol)
        if forceglobal then
          assert_compile(not scope.symmeta[scope.unmanglings[raw]], ("global " .. raw .. " conflicts with local"), symbol)
          do end (scope.manglings)[raw] = global_mangling(raw)
          do end (scope.unmanglings)[global_mangling(raw)] = raw
          if allowed_globals then
            table.insert(allowed_globals, raw)
          else
          end
        else
        end
        return symbol_to_expression(symbol, scope)[1]
      end
    end
    local function compile_top_target(lvalues)
      local inits
      local function _375_(_241)
        if scope.manglings[_241] then
          return _241
        else
          return "nil"
        end
      end
      inits = utils.map(lvalues, _375_)
      local init = table.concat(inits, ", ")
      local lvalue = table.concat(lvalues, ", ")
      local plast = parent[#parent]
      local plen = #parent
      local ret = compile1(from, scope, parent, {target = lvalue})
      if declaration then
        for pi = plen, #parent do
          if (parent[pi] == plast) then
            plen = pi
          else
          end
        end
        if ((#parent == (plen + 1)) and parent[#parent].leaf) then
          parent[#parent]["leaf"] = ("local " .. parent[#parent].leaf)
        elseif (init == "nil") then
          table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue)})
        else
          table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue .. " = " .. init)})
        end
      else
      end
      return ret
    end
    local function destructure_sym(left, rightexprs, up1, top_3f)
      local lname = getname(left, up1)
      check_binding_valid(left, scope, left)
      if top_3f then
        compile_top_target({lname})
      else
        emit(parent, setter:format(lname, exprs1(rightexprs)), left)
      end
      if declaration then
        scope.symmeta[tostring(left)] = {var = isvar}
        return nil
      else
        return nil
      end
    end
    local unpack_fn = "function (t, k, e)\n                        local mt = getmetatable(t)\n                        if 'table' == type(mt) and mt.__fennelrest then\n                          return mt.__fennelrest(t, k)\n                        elseif e then\n                          local rest = {}\n                          for k, v in pairs(t) do\n                            if not e[k] then rest[k] = v end\n                          end\n                          return rest\n                        else\n                          return {(table.unpack or unpack)(t, k)}\n                        end\n                      end"
    local function destructure_kv_rest(s, v, left, excluded_keys, destructure1)
      local exclude_str
      local _382_
      do
        local tbl_16_auto = {}
        local i_17_auto = #tbl_16_auto
        for _, k in ipairs(excluded_keys) do
          local val_18_auto = string.format("[%s] = true", serialize_string(k))
          if (nil ~= val_18_auto) then
            i_17_auto = (i_17_auto + 1)
            do end (tbl_16_auto)[i_17_auto] = val_18_auto
          else
          end
        end
        _382_ = tbl_16_auto
      end
      exclude_str = table.concat(_382_, ", ")
      local subexpr = utils.expr(string.format(string.gsub(("(" .. unpack_fn .. ")(%s, %s, {%s})"), "\n%s*", " "), s, tostring(v), exclude_str), "expression")
      return destructure1(v, {subexpr}, left)
    end
    local function destructure_rest(s, k, left, destructure1)
      local unpack_str = ("(" .. unpack_fn .. ")(%s, %s)")
      local formatted = string.format(string.gsub(unpack_str, "\n%s*", " "), s, k)
      local subexpr = utils.expr(formatted, "expression")
      assert_compile((utils["sequence?"](left) and (nil == left[(k + 2)])), "expected rest argument before last parameter", left)
      return destructure1(left[(k + 1)], {subexpr}, left)
    end
    local function destructure_table(left, rightexprs, top_3f, destructure1)
      local s = gensym(scope, symtype0)
      local right
      do
        local _384_
        if top_3f then
          _384_ = exprs1(compile1(from, scope, parent))
        else
          _384_ = exprs1(rightexprs)
        end
        if (_384_ == "") then
          right = "nil"
        elseif (nil ~= _384_) then
          local right0 = _384_
          right = right0
        else
          right = nil
        end
      end
      local excluded_keys = {}
      emit(parent, string.format("local %s = %s", s, right), left)
      for k, v in utils.stablepairs(left) do
        if not (("number" == type(k)) and tostring(left[(k - 1)]):find("^&")) then
          if (utils["sym?"](k) and (tostring(k) == "&")) then
            destructure_kv_rest(s, v, left, excluded_keys, destructure1)
          elseif (utils["sym?"](v) and (tostring(v) == "&")) then
            destructure_rest(s, k, left, destructure1)
          elseif (utils["sym?"](k) and (tostring(k) == "&as")) then
            destructure_sym(v, {utils.expr(tostring(s))}, left)
          elseif (utils["sequence?"](left) and (tostring(v) == "&as")) then
            local _, next_sym, trailing = select(k, unpack(left))
            assert_compile((nil == trailing), "expected &as argument before last parameter", left)
            destructure_sym(next_sym, {utils.expr(tostring(s))}, left)
          else
            local key
            if (type(k) == "string") then
              key = serialize_string(k)
            else
              key = k
            end
            local subexpr = utils.expr(string.format("%s[%s]", s, key), "expression")
            if (type(k) == "string") then
              table.insert(excluded_keys, k)
            else
            end
            destructure1(v, {subexpr}, left)
          end
        else
        end
      end
      return nil
    end
    local function destructure_values(left, up1, top_3f, destructure1)
      local left_names, tables = {}, {}
      for i, name in ipairs(left) do
        if utils["sym?"](name) then
          table.insert(left_names, getname(name, up1))
        else
          local symname = gensym(scope, symtype0)
          table.insert(left_names, symname)
          do end (tables)[i] = {name, utils.expr(symname, "sym")}
        end
      end
      assert_compile(left[1], "must provide at least one value", left)
      assert_compile(top_3f, "can't nest multi-value destructuring", left)
      compile_top_target(left_names)
      if declaration then
        for _, sym in ipairs(left) do
          if utils["sym?"](sym) then
            scope.symmeta[tostring(sym)] = {var = isvar}
          else
          end
        end
      else
      end
      for _, pair in utils.stablepairs(tables) do
        destructure1(pair[1], {pair[2]}, left)
      end
      return nil
    end
    local function destructure1(left, rightexprs, up1, top_3f)
      if (utils["sym?"](left) and (left[1] ~= "nil")) then
        destructure_sym(left, rightexprs, up1, top_3f)
      elseif utils["table?"](left) then
        destructure_table(left, rightexprs, top_3f, destructure1)
      elseif utils["list?"](left) then
        destructure_values(left, up1, top_3f, destructure1)
      else
        assert_compile(false, string.format("unable to bind %s %s", type(left), tostring(left)), (((type((up1)[2]) == "table") and (up1)[2]) or up1))
      end
      if top_3f then
        return {returned = true}
      else
        return nil
      end
    end
    local ret = destructure1(to, nil, ast, true)
    utils.hook("destructure", from, to, scope, opts0)
    apply_manglings(scope, new_manglings, ast)
    return ret
  end
  local function require_include(ast, scope, parent, opts)
    opts.fallback = function(e, no_warn)
      if (not no_warn and ("literal" == e.type)) then
        utils.warn(("include module not found, falling back to require: %s"):format(tostring(e)))
      else
      end
      return utils.expr(string.format("require(%s)", tostring(e)), "statement")
    end
    return scopes.global.specials.include(ast, scope, parent, opts)
  end
  local function compile_stream(strm, options)
    local opts = utils.copy(options)
    local old_globals = allowed_globals
    local scope = (opts.scope or make_scope(scopes.global))
    local vals = {}
    local chunk = {}
    do end (function(tgt, m, ...) return tgt[m](tgt, ...) end)(utils.root, "set-reset")
    allowed_globals = opts.allowedGlobals
    if (opts.indent == nil) then
      opts.indent = "  "
    else
    end
    if opts.requireAsInclude then
      scope.specials.require = require_include
    else
    end
    utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts
    for _, val in parser.parser(strm, opts.filename, opts) do
      table.insert(vals, val)
    end
    for i = 1, #vals do
      local exprs = compile1(vals[i], scope, chunk, {nval = (((i < #vals) and 0) or nil), tail = (i == #vals)})
      keep_side_effects(exprs, chunk, nil, vals[i])
      if (i == #vals) then
        utils.hook("chunk", vals[i], scope)
      else
      end
    end
    allowed_globals = old_globals
    utils.root.reset()
    return flatten(chunk, opts)
  end
  local function compile_string(str, _3fopts)
    local opts = (_3fopts or {})
    return compile_stream(parser["string-stream"](str, opts), opts)
  end
  local function compile(ast, opts)
    local opts0 = utils.copy(opts)
    local old_globals = allowed_globals
    local chunk = {}
    local scope = (opts0.scope or make_scope(scopes.global))
    do end (function(tgt, m, ...) return tgt[m](tgt, ...) end)(utils.root, "set-reset")
    allowed_globals = opts0.allowedGlobals
    if (opts0.indent == nil) then
      opts0.indent = "  "
    else
    end
    if opts0.requireAsInclude then
      scope.specials.require = require_include
    else
    end
    utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts0
    local exprs = compile1(ast, scope, chunk, {tail = true})
    keep_side_effects(exprs, chunk, nil, ast)
    utils.hook("chunk", ast, scope)
    allowed_globals = old_globals
    utils.root.reset()
    return flatten(chunk, opts0)
  end
  local function traceback_frame(info)
    if ((info.what == "C") and info.name) then
      return string.format("  [C]: in function '%s'", info.name)
    elseif (info.what == "C") then
      return "  [C]: in ?"
    else
      local remap = sourcemap[info.source]
      if (remap and remap[info.currentline]) then
        if ((remap[info.currentline][1] or "unknown") ~= "unknown") then
          info.short_src = sourcemap[("@" .. remap[info.currentline][1])].short_src
        else
          info.short_src = remap.short_src
        end
        info.currentline = (remap[info.currentline][2] or -1)
      else
      end
      if (info.what == "Lua") then
        local function _404_()
          if info.name then
            return ("'" .. info.name .. "'")
          else
            return "?"
          end
        end
        return string.format("  %s:%d: in function %s", info.short_src, info.currentline, _404_())
      elseif (info.short_src == "(tail call)") then
        return "  (tail call)"
      else
        return string.format("  %s:%d: in main chunk", info.short_src, info.currentline)
      end
    end
  end
  local function traceback(_3fmsg, _3fstart)
    local msg = tostring((_3fmsg or ""))
    if ((msg:find("^%g+:%d+:%d+ Compile error:.*") or msg:find("^%g+:%d+:%d+ Parse error:.*")) and not utils["debug-on?"]("trace")) then
      return msg
    else
      local lines = {}
      if (msg:find("^%g+:%d+:%d+ Compile error:") or msg:find("^%g+:%d+:%d+ Parse error:")) then
        table.insert(lines, msg)
      else
        local newmsg = msg:gsub("^[^:]*:%d+:%s+", "runtime error: ")
        table.insert(lines, newmsg)
      end
      table.insert(lines, "stack traceback:")
      local done_3f, level = false, (_3fstart or 2)
      while not done_3f do
        do
          local _408_ = debug.getinfo(level, "Sln")
          if (_408_ == nil) then
            done_3f = true
          elseif (nil ~= _408_) then
            local info = _408_
            table.insert(lines, traceback_frame(info))
          else
          end
        end
        level = (level + 1)
      end
      return table.concat(lines, "\n")
    end
  end
  local function entry_transform(fk, fv)
    local function _411_(k, v)
      if (type(k) == "number") then
        return k, fv(v)
      else
        return fk(k), fv(v)
      end
    end
    return _411_
  end
  local function mixed_concat(t, joiner)
    local seen = {}
    local ret, s = "", ""
    for k, v in ipairs(t) do
      table.insert(seen, k)
      ret = (ret .. s .. v)
      s = joiner
    end
    for k, v in utils.stablepairs(t) do
      if not seen[k] then
        ret = (ret .. s .. "[" .. k .. "]" .. "=" .. v)
        s = joiner
      else
      end
    end
    return ret
  end
  local function do_quote(form, scope, parent, runtime_3f)
    local function q(x)
      return do_quote(x, scope, parent, runtime_3f)
    end
    if utils["varg?"](form) then
      assert_compile(not runtime_3f, "quoted ... may only be used at compile time", form)
      return "_VARARG"
    elseif utils["sym?"](form) then
      local filename
      if form.filename then
        filename = string.format("%q", form.filename)
      else
        filename = "nil"
      end
      local symstr = tostring(form)
      assert_compile(not runtime_3f, "symbols may only be used at compile time", form)
      if (symstr:find("#$") or symstr:find("#[:.]")) then
        return string.format("sym('%s', {filename=%s, line=%s})", autogensym(symstr, scope), filename, (form.line or "nil"))
      else
        return string.format("sym('%s', {quoted=true, filename=%s, line=%s})", symstr, filename, (form.line or "nil"))
      end
    elseif (utils["list?"](form) and utils["sym?"](form[1]) and (tostring(form[1]) == "unquote")) then
      local payload = form[2]
      local res = unpack(compile1(payload, scope, parent))
      return res[1]
    elseif utils["list?"](form) then
      local mapped
      local function _416_()
        return nil
      end
      mapped = utils.kvmap(form, entry_transform(_416_, q))
      local filename
      if form.filename then
        filename = string.format("%q", form.filename)
      else
        filename = "nil"
      end
      assert_compile(not runtime_3f, "lists may only be used at compile time", form)
      return string.format(("setmetatable({filename=%s, line=%s, bytestart=%s, %s}" .. ", getmetatable(list()))"), filename, (form.line or "nil"), (form.bytestart or "nil"), mixed_concat(mapped, ", "))
    elseif utils["sequence?"](form) then
      local mapped = utils.kvmap(form, entry_transform(q, q))
      local source = getmetatable(form)
      local filename
      if source.filename then
        filename = string.format("%q", source.filename)
      else
        filename = "nil"
      end
      local _419_
      if source then
        _419_ = source.line
      else
        _419_ = "nil"
      end
      return string.format("setmetatable({%s}, {filename=%s, line=%s, sequence=%s})", mixed_concat(mapped, ", "), filename, _419_, "(getmetatable(sequence()))['sequence']")
    elseif (type(form) == "table") then
      local mapped = utils.kvmap(form, entry_transform(q, q))
      local source = getmetatable(form)
      local filename
      if source.filename then
        filename = string.format("%q", source.filename)
      else
        filename = "nil"
      end
      local function _422_()
        if source then
          return source.line
        else
          return "nil"
        end
      end
      return string.format("setmetatable({%s}, {filename=%s, line=%s})", mixed_concat(mapped, ", "), filename, _422_())
    elseif (type(form) == "string") then
      return serialize_string(form)
    else
      return tostring(form)
    end
  end
  return {compile = compile, compile1 = compile1, ["compile-stream"] = compile_stream, ["compile-string"] = compile_string, ["check-binding-valid"] = check_binding_valid, emit = emit, destructure = destructure, ["require-include"] = require_include, autogensym = autogensym, gensym = gensym, ["do-quote"] = do_quote, ["global-mangling"] = global_mangling, ["global-unmangling"] = global_unmangling, ["apply-manglings"] = apply_manglings, macroexpand = macroexpand_2a, ["declare-local"] = declare_local, ["make-scope"] = make_scope, ["keep-side-effects"] = keep_side_effects, ["symbol-to-expression"] = symbol_to_expression, assert = assert_compile, scopes = scopes, traceback = traceback, metadata = make_metadata(), sourcemap = sourcemap}
end
package.preload["fennel.friend"] = package.preload["fennel.friend"] or function(...)
  local utils = require("fennel.utils")
  local utf8_ok_3f, utf8 = pcall(require, "utf8")
  local suggestions = {["unexpected multi symbol (.*)"] = {"removing periods or colons from %s"}, ["use of global (.*) is aliased by a local"] = {"renaming local %s", "refer to the global using _G.%s instead of directly"}, ["local (.*) was overshadowed by a special form or macro"] = {"renaming local %s"}, ["global (.*) conflicts with local"] = {"renaming local %s"}, ["expected var (.*)"] = {"declaring %s using var instead of let/local", "introducing a new local instead of changing the value of %s"}, ["expected macros to be table"] = {"ensuring your macro definitions return a table"}, ["expected each macro to be function"] = {"ensuring that the value for each key in your macros table contains a function", "avoid defining nested macro tables"}, ["macro not found in macro module"] = {"checking the keys of the imported macro module's returned table"}, ["macro tried to bind (.*) without gensym"] = {"changing to %s# when introducing identifiers inside macros"}, ["unknown identifier: (.*)"] = {"looking to see if there's a typo", "using the _G table instead, eg. _G.%s if you really want a global", "moving this code to somewhere that %s is in scope", "binding %s as a local in the scope of this code"}, ["expected a function.* to call"] = {"removing the empty parentheses", "using square brackets if you want an empty table"}, ["cannot call literal value"] = {"checking for typos", "checking for a missing function name", "making sure to use prefix operators, not infix"}, ["unexpected vararg"] = {"putting \"...\" at the end of the fn parameters if the vararg was intended"}, ["multisym method calls may only be in call position"] = {"using a period instead of a colon to reference a table's fields", "putting parens around this"}, ["unused local (.*)"] = {"renaming the local to _%s if it is meant to be unused", "fixing a typo so %s is used", "disabling the linter which checks for unused locals"}, ["expected parameters"] = {"adding function parameters as a list of identifiers in brackets"}, ["unable to bind (.*)"] = {"replacing the %s with an identifier"}, ["expected rest argument before last parameter"] = {"moving & to right before the final identifier when destructuring"}, ["expected vararg as last parameter"] = {"moving the \"...\" to the end of the parameter list"}, ["expected symbol for function parameter: (.*)"] = {"changing %s to an identifier instead of a literal value"}, ["could not compile value of type "] = {"debugging the macro you're calling to return a list or table"}, ["expected local"] = {"looking for a typo", "looking for a local which is used out of its scope"}, ["expected body expression"] = {"putting some code in the body of this form after the bindings"}, ["expected binding and iterator"] = {"making sure you haven't omitted a local name or iterator"}, ["expected binding sequence"] = {"placing a table here in square brackets containing identifiers to bind"}, ["expected even number of name/value bindings"] = {"finding where the identifier or value is missing"}, ["may only be used at compile time"] = {"moving this to inside a macro if you need to manipulate symbols/lists", "using square brackets instead of parens to construct a table"}, ["unexpected closing delimiter (.)"] = {"deleting %s", "adding matching opening delimiter earlier"}, ["mismatched closing delimiter (.), expected (.)"] = {"replacing %s with %s", "deleting %s", "adding matching opening delimiter earlier"}, ["expected even number of values in table literal"] = {"removing a key", "adding a value"}, ["expected whitespace before opening delimiter"] = {"adding whitespace"}, ["invalid character: (.)"] = {"deleting or replacing %s", "avoiding reserved characters like \", \\, ', ~, ;, @, `, and comma"}, ["could not read number (.*)"] = {"removing the non-digit character", "beginning the identifier with a non-digit if it is not meant to be a number"}, ["can't start multisym segment with a digit"] = {"removing the digit", "adding a non-digit before the digit"}, ["malformed multisym"] = {"ensuring each period or colon is not followed by another period or colon"}, ["method must be last component"] = {"using a period instead of a colon for field access", "removing segments after the colon", "making the method call, then looking up the field on the result"}, ["$ and $... in hashfn are mutually exclusive"] = {"modifying the hashfn so it only contains $... or $, $1, $2, $3, etc"}, ["tried to reference a macro without calling it"] = {"renaming the macro so as not to conflict with locals"}, ["tried to reference a special form without calling it"] = {"making sure to use prefix operators, not infix", "wrapping the special in a function if you need it to be first class"}, ["missing subject"] = {"adding an item to operate on"}, ["expected even number of pattern/body pairs"] = {"checking that every pattern has a body to go with it", "adding _ before the final body"}, ["expected at least one pattern/body pair"] = {"adding a pattern and a body to execute when the pattern matches"}, ["unexpected arguments"] = {"removing an argument", "checking for typos"}, ["unexpected iterator clause"] = {"removing an argument", "checking for typos"}}
  local unpack = (table.unpack or _G.unpack)
  local function suggest(msg)
    local s = nil
    for pat, sug in pairs(suggestions) do
      if s then break end
      local matches = {msg:match(pat)}
      if (0 < #matches) then
        local tbl_16_auto = {}
        local i_17_auto = #tbl_16_auto
        for _, s0 in ipairs(sug) do
          local val_18_auto = s0:format(unpack(matches))
          if (nil ~= val_18_auto) then
            i_17_auto = (i_17_auto + 1)
            do end (tbl_16_auto)[i_17_auto] = val_18_auto
          else
          end
        end
        s = tbl_16_auto
      else
        s = nil
      end
    end
    return s
  end
  local function read_line(filename, line, _3fsource)
    if _3fsource then
      local matcher = string.gmatch((_3fsource .. "\n"), "(.-)(\13?\n)")
      for _ = 2, line do
        matcher()
      end
      return matcher()
    else
      local f = assert(io.open(filename))
      local function close_handlers_8_auto(ok_9_auto, ...)
        f:close()
        if ok_9_auto then
          return ...
        else
          return error(..., 0)
        end
      end
      local function _185_()
        for _ = 2, line do
          f:read()
        end
        return f:read()
      end
      return close_handlers_8_auto(_G.xpcall(_185_, (package.loaded.fennel or debug).traceback))
    end
  end
  local function sub(str, start, _end)
    if ((_end < start) or (#str < start) or (#str < _end)) then
      return ""
    elseif utf8_ok_3f then
      return string.sub(str, utf8.offset(str, start), ((utf8.offset(str, (_end + 1)) or (utf8.len(str) + 1)) - 1))
    else
      return string.sub(str, start, math.min(_end, str:len()))
    end
  end
  local function highlight_line(codeline, col, _3fendcol, opts)
    if ((opts and (false == opts["error-pinpoint"])) or (os and os.getenv and os.getenv("NO_COLOR"))) then
      return codeline
    else
      local _let_188_ = (opts or {})
      local error_pinpoint = _let_188_["error-pinpoint"]
      local endcol = (_3fendcol or col)
      local eol
      if utf8_ok_3f then
        eol = utf8.len(codeline)
      else
        eol = string.len(codeline)
      end
      local _let_190_ = (error_pinpoint or {"\27[7m", "\27[0m"})
      local open = _let_190_[1]
      local close = _let_190_[2]
      return (sub(codeline, 1, col) .. open .. sub(codeline, (col + 1), (endcol + 1)) .. close .. sub(codeline, (endcol + 2), eol))
    end
  end
  local function friendly_msg(msg, _192_, source, opts)
    local _arg_193_ = _192_
    local filename = _arg_193_["filename"]
    local line = _arg_193_["line"]
    local col = _arg_193_["col"]
    local endcol = _arg_193_["endcol"]
    local ok, codeline = pcall(read_line, filename, line, source)
    local out = {msg, ""}
    if (ok and codeline) then
      if col then
        table.insert(out, highlight_line(codeline, col, endcol, opts))
      else
        table.insert(out, codeline)
      end
    else
    end
    for _, suggestion in ipairs((suggest(msg) or {})) do
      table.insert(out, ("* Try %s."):format(suggestion))
    end
    return table.concat(out, "\n")
  end
  local function assert_compile(condition, msg, ast, source, opts)
    if not condition then
      local _let_196_ = utils["ast-source"](ast)
      local filename = _let_196_["filename"]
      local line = _let_196_["line"]
      local col = _let_196_["col"]
      error(friendly_msg(("%s:%s:%s Compile error: %s"):format((filename or "unknown"), (line or "?"), (col or "?"), msg), utils["ast-source"](ast), source, opts), 0)
    else
    end
    return condition
  end
  local function parse_error(msg, filename, line, col, source, opts)
    return error(friendly_msg(("%s:%s:%s Parse error: %s"):format(filename, line, col, msg), {filename = filename, line = line, col = col}, source, opts), 0)
  end
  return {["assert-compile"] = assert_compile, ["parse-error"] = parse_error}
end
package.preload["fennel.parser"] = package.preload["fennel.parser"] or function(...)
  local utils = require("fennel.utils")
  local friend = require("fennel.friend")
  local unpack = (table.unpack or _G.unpack)
  local function granulate(getchunk)
    local c, index, done_3f = "", 1, false
    local function _198_(parser_state)
      if not done_3f then
        if (index <= #c) then
          local b = c:byte(index)
          index = (index + 1)
          return b
        else
          local _199_ = getchunk(parser_state)
          local function _200_()
            local char = _199_
            return (char ~= "")
          end
          if ((nil ~= _199_) and _200_()) then
            local char = _199_
            c = char
            index = 2
            return c:byte()
          elseif true then
            local _ = _199_
            done_3f = true
            return nil
          else
            return nil
          end
        end
      else
        return nil
      end
    end
    local function _204_()
      c = ""
      return nil
    end
    return _198_, _204_
  end
  local function string_stream(str, _3foptions)
    local str0 = str:gsub("^#!", ";;")
    if _3foptions then
      _3foptions.source = str0
    else
    end
    local index = 1
    local function _206_()
      local r = str0:byte(index)
      index = (index + 1)
      return r
    end
    return _206_
  end
  local delims = {[40] = 41, [41] = true, [91] = 93, [93] = true, [123] = 125, [125] = true}
  local function sym_char_3f(b)
    local b0
    if ("number" == type(b)) then
      b0 = b
    else
      b0 = string.byte(b)
    end
    return ((32 < b0) and not delims[b0] and (b0 ~= 127) and (b0 ~= 34) and (b0 ~= 39) and (b0 ~= 126) and (b0 ~= 59) and (b0 ~= 44) and (b0 ~= 64) and (b0 ~= 96))
  end
  local prefixes = {[35] = "hashfn", [39] = "quote", [44] = "unquote", [96] = "quote"}
  local function char_starter_3f(b)
    return ((function(_208_,_209_,_210_) return (_208_ < _209_) and (_209_ < _210_) end)(1,b,127) or (function(_211_,_212_,_213_) return (_211_ < _212_) and (_212_ < _213_) end)(192,b,247))
  end
  local function parser_fn(getbyte, filename, _214_)
    local _arg_215_ = _214_
    local source = _arg_215_["source"]
    local unfriendly = _arg_215_["unfriendly"]
    local comments = _arg_215_["comments"]
    local options = _arg_215_
    local stack = {}
    local line, byteindex, col, prev_col, lastb = 1, 0, 0, 0, nil
    local function ungetb(ub)
      if char_starter_3f(ub) then
        col = (col - 1)
      else
      end
      if (ub == 10) then
        line, col = (line - 1), prev_col
      else
      end
      byteindex = (byteindex - 1)
      lastb = ub
      return nil
    end
    local function getb()
      local r = nil
      if lastb then
        r, lastb = lastb, nil
      else
        r = getbyte({["stack-size"] = #stack})
      end
      byteindex = (byteindex + 1)
      if (r and char_starter_3f(r)) then
        col = (col + 1)
      else
      end
      if (r == 10) then
        line, col, prev_col = (line + 1), 0, col
      else
      end
      return r
    end
    local function whitespace_3f(b)
      local function _225_()
        local t_224_ = options.whitespace
        if (nil ~= t_224_) then
          t_224_ = (t_224_)[b]
        else
        end
        return t_224_
      end
      return ((b == 32) or (function(_221_,_222_,_223_) return (_221_ <= _222_) and (_222_ <= _223_) end)(9,b,13) or _225_())
    end
    local function parse_error(msg, _3fcol_adjust)
      local col0 = (col + (_3fcol_adjust or -1))
      if (nil == utils["hook-opts"]("parse-error", options, msg, filename, (line or "?"), col0, source, utils.root.reset)) then
        utils.root.reset()
        if (unfriendly or not _G.io or not _G.io.read) then
          return error(string.format("%s:%s:%s Parse error: %s", filename, (line or "?"), col0, msg), 0)
        else
          return friend["parse-error"](msg, filename, (line or "?"), col0, source, options)
        end
      else
        return nil
      end
    end
    local function parse_stream()
      local whitespace_since_dispatch, done_3f, retval = true
      local function set_source_fields(source0)
        source0.byteend, source0.endcol = byteindex, (col - 1)
        return nil
      end
      local function dispatch(v)
        local _229_ = stack[#stack]
        if (_229_ == nil) then
          retval, done_3f, whitespace_since_dispatch = v, true, false
          return nil
        elseif ((_G.type(_229_) == "table") and (nil ~= (_229_).prefix)) then
          local prefix = (_229_).prefix
          local source0
          do
            local _230_ = table.remove(stack)
            set_source_fields(_230_)
            source0 = _230_
          end
          local list = utils.list(utils.sym(prefix, source0), v)
          for k, v0 in pairs(source0) do
            list[k] = v0
          end
          return dispatch(list)
        elseif (nil ~= _229_) then
          local top = _229_
          whitespace_since_dispatch = false
          return table.insert(top, v)
        else
          return nil
        end
      end
      local function badend()
        local accum = utils.map(stack, "closer")
        local _232_
        if (#stack == 1) then
          _232_ = ""
        else
          _232_ = "s"
        end
        return parse_error(string.format("expected closing delimiter%s %s", _232_, string.char(unpack(accum))))
      end
      local function skip_whitespace(b)
        if (b and whitespace_3f(b)) then
          whitespace_since_dispatch = true
          return skip_whitespace(getb())
        elseif (not b and (0 < #stack)) then
          return badend()
        else
          return b
        end
      end
      local function parse_comment(b, contents)
        if (b and (10 ~= b)) then
          local function _236_()
            local _235_ = contents
            table.insert(_235_, string.char(b))
            return _235_
          end
          return parse_comment(getb(), _236_())
        elseif comments then
          ungetb(10)
          return dispatch(utils.comment(table.concat(contents), {line = line, filename = filename}))
        else
          return nil
        end
      end
      local function open_table(b)
        if not whitespace_since_dispatch then
          parse_error(("expected whitespace before opening delimiter " .. string.char(b)))
        else
        end
        return table.insert(stack, {bytestart = byteindex, closer = delims[b], filename = filename, line = line, col = (col - 1)})
      end
      local function close_list(list)
        return dispatch(setmetatable(list, getmetatable(utils.list())))
      end
      local function close_sequence(tbl)
        local val = utils.sequence(unpack(tbl))
        for k, v in pairs(tbl) do
          getmetatable(val)[k] = v
        end
        return dispatch(val)
      end
      local function add_comment_at(comments0, index, node)
        local _239_ = (comments0)[index]
        if (nil ~= _239_) then
          local existing = _239_
          return table.insert(existing, node)
        elseif true then
          local _ = _239_
          comments0[index] = {node}
          return nil
        else
          return nil
        end
      end
      local function next_noncomment(tbl, i)
        if utils["comment?"](tbl[i]) then
          return next_noncomment(tbl, (i + 1))
        elseif (utils.sym(":") == tbl[i]) then
          return tostring(tbl[(i + 1)])
        else
          return tbl[i]
        end
      end
      local function extract_comments(tbl)
        local comments0 = {keys = {}, values = {}, last = {}}
        while utils["comment?"](tbl[#tbl]) do
          table.insert(comments0.last, 1, table.remove(tbl))
        end
        local last_key_3f = false
        for i, node in ipairs(tbl) do
          if not utils["comment?"](node) then
            last_key_3f = not last_key_3f
          elseif last_key_3f then
            add_comment_at(comments0.values, next_noncomment(tbl, i), node)
          else
            add_comment_at(comments0.keys, next_noncomment(tbl, i), node)
          end
        end
        for i = #tbl, 1, -1 do
          if utils["comment?"](tbl[i]) then
            table.remove(tbl, i)
          else
          end
        end
        return comments0
      end
      local function close_curly_table(tbl)
        local comments0 = extract_comments(tbl)
        local keys = {}
        local val = {}
        if ((#tbl % 2) ~= 0) then
          byteindex = (byteindex - 1)
          parse_error("expected even number of values in table literal")
        else
        end
        setmetatable(val, tbl)
        for i = 1, #tbl, 2 do
          if ((tostring(tbl[i]) == ":") and utils["sym?"](tbl[(i + 1)]) and utils["sym?"](tbl[i])) then
            tbl[i] = tostring(tbl[(i + 1)])
          else
          end
          val[tbl[i]] = tbl[(i + 1)]
          table.insert(keys, tbl[i])
        end
        tbl.comments = comments0
        tbl.keys = keys
        return dispatch(val)
      end
      local function close_table(b)
        local top = table.remove(stack)
        if (top == nil) then
          parse_error(("unexpected closing delimiter " .. string.char(b)))
        else
        end
        if (top.closer and (top.closer ~= b)) then
          parse_error(("mismatched closing delimiter " .. string.char(b) .. ", expected " .. string.char(top.closer)))
        else
        end
        set_source_fields(top)
        if (b == 41) then
          return close_list(top)
        elseif (b == 93) then
          return close_sequence(top)
        else
          return close_curly_table(top)
        end
      end
      local function parse_string_loop(chars, b, state)
        table.insert(chars, b)
        local state0
        do
          local _249_ = {state, b}
          if ((_G.type(_249_) == "table") and ((_249_)[1] == "base") and ((_249_)[2] == 92)) then
            state0 = "backslash"
          elseif ((_G.type(_249_) == "table") and ((_249_)[1] == "base") and ((_249_)[2] == 34)) then
            state0 = "done"
          elseif ((_G.type(_249_) == "table") and ((_249_)[1] == "backslash") and ((_249_)[2] == 10)) then
            table.remove(chars, (#chars - 1))
            state0 = "base"
          elseif true then
            local _ = _249_
            state0 = "base"
          else
            state0 = nil
          end
        end
        if (b and (state0 ~= "done")) then
          return parse_string_loop(chars, getb(), state0)
        else
          return b
        end
      end
      local function escape_char(c)
        return ({[7] = "\\a", [8] = "\\b", [9] = "\\t", [10] = "\\n", [11] = "\\v", [12] = "\\f", [13] = "\\r"})[c:byte()]
      end
      local function parse_string()
        table.insert(stack, {closer = 34})
        local chars = {34}
        if not parse_string_loop(chars, getb(), "base") then
          badend()
        else
        end
        table.remove(stack)
        local raw = string.char(unpack(chars))
        local formatted = raw:gsub("[\7-\13]", escape_char)
        local _253_ = (rawget(_G, "loadstring") or load)(("return " .. formatted))
        if (nil ~= _253_) then
          local load_fn = _253_
          return dispatch(load_fn())
        elseif (_253_ == nil) then
          return parse_error(("Invalid string: " .. raw))
        else
          return nil
        end
      end
      local function parse_prefix(b)
        table.insert(stack, {prefix = prefixes[b], filename = filename, line = line, bytestart = byteindex, col = (col - 1)})
        local nextb = getb()
        if (whitespace_3f(nextb) or (true == delims[nextb])) then
          if (b ~= 35) then
            parse_error("invalid whitespace after quoting prefix")
          else
          end
          table.remove(stack)
          dispatch(utils.sym("#"))
        else
        end
        return ungetb(nextb)
      end
      local function parse_sym_loop(chars, b)
        if (b and sym_char_3f(b)) then
          table.insert(chars, b)
          return parse_sym_loop(chars, getb())
        else
          if b then
            ungetb(b)
          else
          end
          return chars
        end
      end
      local function parse_number(rawstr)
        local number_with_stripped_underscores = (not rawstr:find("^_") and rawstr:gsub("_", ""))
        if rawstr:match("^%d") then
          dispatch((tonumber(number_with_stripped_underscores) or parse_error(("could not read number \"" .. rawstr .. "\""))))
          return true
        else
          local _259_ = tonumber(number_with_stripped_underscores)
          if (nil ~= _259_) then
            local x = _259_
            dispatch(x)
            return true
          elseif true then
            local _ = _259_
            return false
          else
            return nil
          end
        end
      end
      local function check_malformed_sym(rawstr)
        local function col_adjust(pat)
          return (rawstr:find(pat) - utils.len(rawstr) - 1)
        end
        if (rawstr:match("^~") and (rawstr ~= "~=")) then
          return parse_error("invalid character: ~")
        elseif rawstr:match("%.[0-9]") then
          return parse_error(("can't start multisym segment with a digit: " .. rawstr), col_adjust("%.[0-9]"))
        elseif (rawstr:match("[%.:][%.:]") and (rawstr ~= "..") and (rawstr ~= "$...")) then
          return parse_error(("malformed multisym: " .. rawstr), col_adjust("[%.:][%.:]"))
        elseif ((rawstr ~= ":") and rawstr:match(":$")) then
          return parse_error(("malformed multisym: " .. rawstr), col_adjust(":$"))
        elseif rawstr:match(":.+[%.:]") then
          return parse_error(("method must be last component of multisym: " .. rawstr), col_adjust(":.+[%.:]"))
        else
          return rawstr
        end
      end
      local function parse_sym(b)
        local source0 = {bytestart = byteindex, filename = filename, line = line, col = (col - 1)}
        local rawstr = string.char(unpack(parse_sym_loop({b}, getb())))
        set_source_fields(source0)
        if (rawstr == "true") then
          return dispatch(true)
        elseif (rawstr == "false") then
          return dispatch(false)
        elseif (rawstr == "...") then
          return dispatch(utils.varg(source0))
        elseif rawstr:match("^:.+$") then
          return dispatch(rawstr:sub(2))
        elseif not parse_number(rawstr) then
          return dispatch(utils.sym(check_malformed_sym(rawstr), source0))
        else
          return nil
        end
      end
      local function parse_loop(b)
        if not b then
        elseif (b == 59) then
          parse_comment(getb(), {";"})
        elseif (type(delims[b]) == "number") then
          open_table(b)
        elseif delims[b] then
          close_table(b)
        elseif (b == 34) then
          parse_string(b)
        elseif prefixes[b] then
          parse_prefix(b)
        elseif (sym_char_3f(b) or (b == string.byte("~"))) then
          parse_sym(b)
        elseif not utils["hook-opts"]("illegal-char", options, b, getb, ungetb, dispatch) then
          parse_error(("invalid character: " .. string.char(b)))
        else
        end
        if not b then
          return nil
        elseif done_3f then
          return true, retval
        else
          return parse_loop(skip_whitespace(getb()))
        end
      end
      return parse_loop(skip_whitespace(getb()))
    end
    local function _266_()
      stack, line, byteindex, col, lastb = {}, 1, 0, 0, nil
      return nil
    end
    return parse_stream, _266_
  end
  local function parser(stream_or_string, _3ffilename, _3foptions)
    local filename = (_3ffilename or "unknown")
    local options = (_3foptions or utils.root.options or {})
    assert(("string" == type(filename)), "expected filename as second argument to parser")
    if ("string" == type(stream_or_string)) then
      return parser_fn(string_stream(stream_or_string, options), filename, options)
    else
      return parser_fn(stream_or_string, filename, options)
    end
  end
  return {granulate = granulate, parser = parser, ["string-stream"] = string_stream, ["sym-char?"] = sym_char_3f}
end
local utils
package.preload["fennel.view"] = package.preload["fennel.view"] or function(...)
  local type_order = {number = 1, boolean = 2, string = 3, table = 4, ["function"] = 5, userdata = 6, thread = 7}
  local default_opts = {["one-line?"] = false, ["detect-cycles?"] = true, ["empty-as-sequence?"] = false, ["metamethod?"] = true, ["prefer-colon?"] = false, ["escape-newlines?"] = false, ["utf8?"] = true, ["line-length"] = 80, depth = 128, ["max-sparse-gap"] = 10}
  local lua_pairs = pairs
  local lua_ipairs = ipairs
  local function pairs(t)
    local _1_ = getmetatable(t)
    if ((_G.type(_1_) == "table") and (nil ~= (_1_).__pairs)) then
      local p = (_1_).__pairs
      return p(t)
    elseif true then
      local _ = _1_
      return lua_pairs(t)
    else
      return nil
    end
  end
  local function ipairs(t)
    local _3_ = getmetatable(t)
    if ((_G.type(_3_) == "table") and (nil ~= (_3_).__ipairs)) then
      local i = (_3_).__ipairs
      return i(t)
    elseif true then
      local _ = _3_
      return lua_ipairs(t)
    else
      return nil
    end
  end
  local function length_2a(t)
    local _5_ = getmetatable(t)
    if ((_G.type(_5_) == "table") and (nil ~= (_5_).__len)) then
      local l = (_5_).__len
      return l(t)
    elseif true then
      local _ = _5_
      return #t
    else
      return nil
    end
  end
  local function get_default(key)
    local _7_ = default_opts[key]
    if (_7_ == nil) then
      return error(("option '%s' doesn't have a default value, use the :after key to set it"):format(tostring(key)))
    elseif (nil ~= _7_) then
      local v = _7_
      return v
    else
      return nil
    end
  end
  local function getopt(options, key)
    local val = options[key]
    local _9_ = val
    if ((_G.type(_9_) == "table") and (nil ~= (_9_).once)) then
      local val_2a = (_9_).once
      return val_2a
    elseif true then
      local _ = _9_
      return val
    else
      return nil
    end
  end
  local function normalize_opts(options)
    local tbl_13_auto = {}
    for k, v in pairs(options) do
      local k_14_auto, v_15_auto = nil, nil
      local function _12_()
        local _11_ = v
        if ((_G.type(_11_) == "table") and (nil ~= (_11_).after)) then
          local val = (_11_).after
          return val
        else
          local function _13_()
            return v.once
          end
          if ((_G.type(_11_) == "table") and _13_()) then
            return get_default(k)
          elseif true then
            local _ = _11_
            return v
          else
            return nil
          end
        end
      end
      k_14_auto, v_15_auto = k, _12_()
      if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
        tbl_13_auto[k_14_auto] = v_15_auto
      else
      end
    end
    return tbl_13_auto
  end
  local function sort_keys(_16_, _18_)
    local _arg_17_ = _16_
    local a = _arg_17_[1]
    local _arg_19_ = _18_
    local b = _arg_19_[1]
    local ta = type(a)
    local tb = type(b)
    if ((ta == tb) and ((ta == "string") or (ta == "number"))) then
      return (a < b)
    else
      local dta = type_order[ta]
      local dtb = type_order[tb]
      if (dta and dtb) then
        return (dta < dtb)
      elseif dta then
        return true
      elseif dtb then
        return false
      else
        return (ta < tb)
      end
    end
  end
  local function max_index_gap(kv)
    local gap = 0
    if (0 < length_2a(kv)) then
      local i = 0
      for _, _22_ in ipairs(kv) do
        local _each_23_ = _22_
        local k = _each_23_[1]
        if (gap < (k - i)) then
          gap = (k - i)
        else
        end
        i = k
      end
    else
    end
    return gap
  end
  local function fill_gaps(kv)
    local missing_indexes = {}
    local i = 0
    for _, _26_ in ipairs(kv) do
      local _each_27_ = _26_
      local j = _each_27_[1]
      i = (i + 1)
      while (i < j) do
        table.insert(missing_indexes, i)
        i = (i + 1)
      end
    end
    for _, k in ipairs(missing_indexes) do
      table.insert(kv, k, {k})
    end
    return nil
  end
  local function table_kv_pairs(t, options)
    local assoc_3f = false
    local kv = {}
    local insert = table.insert
    for k, v in pairs(t) do
      if ((type(k) ~= "number") or (k < 1)) then
        assoc_3f = true
      else
      end
      insert(kv, {k, v})
    end
    table.sort(kv, sort_keys)
    if not assoc_3f then
      if (options["max-sparse-gap"] < max_index_gap(kv)) then
        assoc_3f = true
      else
        fill_gaps(kv)
      end
    else
    end
    if (length_2a(kv) == 0) then
      return kv, "empty"
    else
      local function _31_()
        if assoc_3f then
          return "table"
        else
          return "seq"
        end
      end
      return kv, _31_()
    end
  end
  local function count_table_appearances(t, appearances)
    if (type(t) == "table") then
      if not appearances[t] then
        appearances[t] = 1
        for k, v in pairs(t) do
          count_table_appearances(k, appearances)
          count_table_appearances(v, appearances)
        end
      else
        appearances[t] = ((appearances[t] or 0) + 1)
      end
    else
    end
    return appearances
  end
  local function save_table(t, seen)
    local seen0 = (seen or {len = 0})
    local id = (seen0.len + 1)
    if not (seen0)[t] then
      seen0[t] = id
      seen0.len = id
    else
    end
    return seen0
  end
  local function detect_cycle(t, seen, _3fk)
    if ("table" == type(t)) then
      seen[t] = true
      local _36_, _37_ = next(t, _3fk)
      if ((nil ~= _36_) and (nil ~= _37_)) then
        local k = _36_
        local v = _37_
        return (seen[k] or detect_cycle(k, seen) or seen[v] or detect_cycle(v, seen) or detect_cycle(t, seen, k))
      else
        return nil
      end
    else
      return nil
    end
  end
  local function visible_cycle_3f(t, options)
    return (getopt(options, "detect-cycles?") and detect_cycle(t, {}) and save_table(t, options.seen) and (1 < (options.appearances[t] or 0)))
  end
  local function table_indent(indent, id)
    local opener_length
    if id then
      opener_length = (length_2a(tostring(id)) + 2)
    else
      opener_length = 1
    end
    return (indent + opener_length)
  end
  local pp = nil
  local function concat_table_lines(elements, options, multiline_3f, indent, table_type, prefix, last_comment_3f)
    local indent_str = ("\n" .. string.rep(" ", indent))
    local open
    local function _41_()
      if ("seq" == table_type) then
        return "["
      else
        return "{"
      end
    end
    open = ((prefix or "") .. _41_())
    local close
    if ("seq" == table_type) then
      close = "]"
    else
      close = "}"
    end
    local oneline = (open .. table.concat(elements, " ") .. close)
    if (not getopt(options, "one-line?") and (multiline_3f or (options["line-length"] < (indent + length_2a(oneline))) or last_comment_3f)) then
      local function _43_()
        if last_comment_3f then
          return indent_str
        else
          return ""
        end
      end
      return (open .. table.concat(elements, indent_str) .. _43_() .. close)
    else
      return oneline
    end
  end
  local function utf8_len(x)
    local n = 0
    for _ in string.gmatch(x, "[%z\1-\127\192-\247]") do
      n = (n + 1)
    end
    return n
  end
  local function comment_3f(x)
    if ("table" == type(x)) then
      local fst = x[1]
      return (("string" == type(fst)) and (nil ~= fst:find("^;")))
    else
      return false
    end
  end
  local function pp_associative(t, kv, options, indent)
    local multiline_3f = false
    local id = options.seen[t]
    if (options.depth <= options.level) then
      return "{...}"
    elseif (id and getopt(options, "detect-cycles?")) then
      return ("@" .. id .. "{...}")
    else
      local visible_cycle_3f0 = visible_cycle_3f(t, options)
      local id0 = (visible_cycle_3f0 and options.seen[t])
      local indent0 = table_indent(indent, id0)
      local slength
      if getopt(options, "utf8?") then
        slength = utf8_len
      else
        local function _46_(_241)
          return #_241
        end
        slength = _46_
      end
      local prefix
      if visible_cycle_3f0 then
        prefix = ("@" .. id0)
      else
        prefix = ""
      end
      local items
      do
        local options0 = normalize_opts(options)
        local tbl_16_auto = {}
        local i_17_auto = #tbl_16_auto
        for _, _49_ in ipairs(kv) do
          local _each_50_ = _49_
          local k = _each_50_[1]
          local v = _each_50_[2]
          local val_18_auto
          do
            local k0 = pp(k, options0, (indent0 + 1), true)
            local v0 = pp(v, options0, (indent0 + slength(k0) + 1))
            multiline_3f = (multiline_3f or k0:find("\n") or v0:find("\n"))
            val_18_auto = (k0 .. " " .. v0)
          end
          if (nil ~= val_18_auto) then
            i_17_auto = (i_17_auto + 1)
            do end (tbl_16_auto)[i_17_auto] = val_18_auto
          else
          end
        end
        items = tbl_16_auto
      end
      return concat_table_lines(items, options, multiline_3f, indent0, "table", prefix, false)
    end
  end
  local function pp_sequence(t, kv, options, indent)
    local multiline_3f = false
    local id = options.seen[t]
    if (options.depth <= options.level) then
      return "[...]"
    elseif (id and getopt(options, "detect-cycles?")) then
      return ("@" .. id .. "[...]")
    else
      local visible_cycle_3f0 = visible_cycle_3f(t, options)
      local id0 = (visible_cycle_3f0 and options.seen[t])
      local indent0 = table_indent(indent, id0)
      local prefix
      if visible_cycle_3f0 then
        prefix = ("@" .. id0)
      else
        prefix = ""
      end
      local last_comment_3f = comment_3f(t[#t])
      local items
      do
        local options0 = normalize_opts(options)
        local tbl_16_auto = {}
        local i_17_auto = #tbl_16_auto
        for _, _54_ in ipairs(kv) do
          local _each_55_ = _54_
          local _0 = _each_55_[1]
          local v = _each_55_[2]
          local val_18_auto
          do
            local v0 = pp(v, options0, indent0)
            multiline_3f = (multiline_3f or v0:find("\n") or v0:find("^;"))
            val_18_auto = v0
          end
          if (nil ~= val_18_auto) then
            i_17_auto = (i_17_auto + 1)
            do end (tbl_16_auto)[i_17_auto] = val_18_auto
          else
          end
        end
        items = tbl_16_auto
      end
      return concat_table_lines(items, options, multiline_3f, indent0, "seq", prefix, last_comment_3f)
    end
  end
  local function concat_lines(lines, options, indent, force_multi_line_3f)
    if (length_2a(lines) == 0) then
      if getopt(options, "empty-as-sequence?") then
        return "[]"
      else
        return "{}"
      end
    else
      local oneline
      local _59_
      do
        local tbl_16_auto = {}
        local i_17_auto = #tbl_16_auto
        for _, line in ipairs(lines) do
          local val_18_auto = line:gsub("^%s+", "")
          if (nil ~= val_18_auto) then
            i_17_auto = (i_17_auto + 1)
            do end (tbl_16_auto)[i_17_auto] = val_18_auto
          else
          end
        end
        _59_ = tbl_16_auto
      end
      oneline = table.concat(_59_, " ")
      if (not getopt(options, "one-line?") and (force_multi_line_3f or oneline:find("\n") or (options["line-length"] < (indent + length_2a(oneline))))) then
        return table.concat(lines, ("\n" .. string.rep(" ", indent)))
      else
        return oneline
      end
    end
  end
  local function pp_metamethod(t, metamethod, options, indent)
    if (options.depth <= options.level) then
      if getopt(options, "empty-as-sequence?") then
        return "[...]"
      else
        return "{...}"
      end
    else
      local _
      local function _64_(_241)
        return visible_cycle_3f(_241, options)
      end
      options["visible-cycle?"] = _64_
      _ = nil
      local lines, force_multi_line_3f = nil, nil
      do
        local options0 = normalize_opts(options)
        lines, force_multi_line_3f = metamethod(t, pp, options0, indent)
      end
      options["visible-cycle?"] = nil
      local _65_ = type(lines)
      if (_65_ == "string") then
        return lines
      elseif (_65_ == "table") then
        return concat_lines(lines, options, indent, force_multi_line_3f)
      elseif true then
        local _0 = _65_
        return error("__fennelview metamethod must return a table of lines")
      else
        return nil
      end
    end
  end
  local function pp_table(x, options, indent)
    options.level = (options.level + 1)
    local x0
    do
      local _68_
      if getopt(options, "metamethod?") then
        local _69_ = x
        if (nil ~= _69_) then
          local _70_ = getmetatable(_69_)
          if (nil ~= _70_) then
            _68_ = (_70_).__fennelview
          else
            _68_ = _70_
          end
        else
          _68_ = _69_
        end
      else
        _68_ = nil
      end
      if (nil ~= _68_) then
        local metamethod = _68_
        x0 = pp_metamethod(x, metamethod, options, indent)
      elseif true then
        local _ = _68_
        local _74_, _75_ = table_kv_pairs(x, options)
        if (true and (_75_ == "empty")) then
          local _0 = _74_
          if getopt(options, "empty-as-sequence?") then
            x0 = "[]"
          else
            x0 = "{}"
          end
        elseif ((nil ~= _74_) and (_75_ == "table")) then
          local kv = _74_
          x0 = pp_associative(x, kv, options, indent)
        elseif ((nil ~= _74_) and (_75_ == "seq")) then
          local kv = _74_
          x0 = pp_sequence(x, kv, options, indent)
        else
          x0 = nil
        end
      else
        x0 = nil
      end
    end
    options.level = (options.level - 1)
    return x0
  end
  local function number__3estring(n)
    local _79_ = string.gsub(tostring(n), ",", ".")
    return _79_
  end
  local function colon_string_3f(s)
    return s:find("^[-%w?^_!$%&*+./@|<=>]+$")
  end
  local utf8_inits = {{["min-byte"] = 0, ["max-byte"] = 127, ["min-code"] = 0, ["max-code"] = 127, len = 1}, {["min-byte"] = 192, ["max-byte"] = 223, ["min-code"] = 128, ["max-code"] = 2047, len = 2}, {["min-byte"] = 224, ["max-byte"] = 239, ["min-code"] = 2048, ["max-code"] = 65535, len = 3}, {["min-byte"] = 240, ["max-byte"] = 247, ["min-code"] = 65536, ["max-code"] = 1114111, len = 4}}
  local function utf8_escape(str)
    local function validate_utf8(str0, index)
      local inits = utf8_inits
      local byte = string.byte(str0, index)
      local init
      do
        local ret = nil
        for _, init0 in ipairs(inits) do
          if ret then break end
          ret = (byte and (function(_80_,_81_,_82_) return (_80_ <= _81_) and (_81_ <= _82_) end)(init0["min-byte"],byte,init0["max-byte"]) and init0)
        end
        init = ret
      end
      local code
      local function _83_()
        local code0
        if init then
          code0 = (byte - init["min-byte"])
        else
          code0 = nil
        end
        for i = (index + 1), (index + init.len + -1) do
          local byte0 = string.byte(str0, i)
          code0 = (byte0 and code0 and (function(_85_,_86_,_87_) return (_85_ <= _86_) and (_86_ <= _87_) end)(128,byte0,191) and ((code0 * 64) + (byte0 - 128)))
        end
        return code0
      end
      code = (init and _83_())
      if (code and (function(_88_,_89_,_90_) return (_88_ <= _89_) and (_89_ <= _90_) end)(init["min-code"],code,init["max-code"]) and not (function(_91_,_92_,_93_) return (_91_ <= _92_) and (_92_ <= _93_) end)(55296,code,57343)) then
        return init.len
      else
        return nil
      end
    end
    local index = 1
    local output = {}
    while (index <= #str) do
      local nexti = (string.find(str, "[\128-\255]", index) or (#str + 1))
      local len = validate_utf8(str, nexti)
      table.insert(output, string.sub(str, index, (nexti + (len or 0) + -1)))
      if (not len and (nexti <= #str)) then
        table.insert(output, string.format("\\%03d", string.byte(str, nexti)))
      else
      end
      if len then
        index = (nexti + len)
      else
        index = (nexti + 1)
      end
    end
    return table.concat(output)
  end
  local function pp_string(str, options, indent)
    local len = length_2a(str)
    local esc_newline_3f = ((len < 2) or (getopt(options, "escape-newlines?") and (len < (options["line-length"] - indent))))
    local escs
    local _97_
    if esc_newline_3f then
      _97_ = "\\n"
    else
      _97_ = "\n"
    end
    local function _99_(_241, _242)
      return ("\\%03d"):format(_242:byte())
    end
    escs = setmetatable({["\7"] = "\\a", ["\8"] = "\\b", ["\12"] = "\\f", ["\11"] = "\\v", ["\13"] = "\\r", ["\9"] = "\\t", ["\\"] = "\\\\", ["\""] = "\\\"", ["\n"] = _97_}, {__index = _99_})
    local str0 = ("\"" .. str:gsub("[%c\\\"]", escs) .. "\"")
    if getopt(options, "utf8?") then
      return utf8_escape(str0)
    else
      return str0
    end
  end
  local function make_options(t, options)
    local defaults
    do
      local tbl_13_auto = {}
      for k, v in pairs(default_opts) do
        local k_14_auto, v_15_auto = k, v
        if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
          tbl_13_auto[k_14_auto] = v_15_auto
        else
        end
      end
      defaults = tbl_13_auto
    end
    local overrides = {level = 0, appearances = count_table_appearances(t, {}), seen = {len = 0}}
    for k, v in pairs((options or {})) do
      defaults[k] = v
    end
    for k, v in pairs(overrides) do
      defaults[k] = v
    end
    return defaults
  end
  local function _102_(x, options, indent, colon_3f)
    local indent0 = (indent or 0)
    local options0 = (options or make_options(x))
    local x0
    if options0.preprocess then
      x0 = options0.preprocess(x, options0)
    else
      x0 = x
    end
    local tv = type(x0)
    local function _105_()
      local _104_ = getmetatable(x0)
      if (nil ~= _104_) then
        return (_104_).__fennelview
      else
        return _104_
      end
    end
    if ((tv == "table") or ((tv == "userdata") and _105_())) then
      return pp_table(x0, options0, indent0)
    elseif (tv == "number") then
      return number__3estring(x0)
    else
      local function _107_()
        if (colon_3f ~= nil) then
          return colon_3f
        elseif ("function" == type(options0["prefer-colon?"])) then
          return options0["prefer-colon?"](x0)
        else
          return getopt(options0, "prefer-colon?")
        end
      end
      if ((tv == "string") and colon_string_3f(x0) and _107_()) then
        return (":" .. x0)
      elseif (tv == "string") then
        return pp_string(x0, options0, indent0)
      elseif ((tv == "boolean") or (tv == "nil")) then
        return tostring(x0)
      else
        return ("#<" .. tostring(x0) .. ">")
      end
    end
  end
  pp = _102_
  local function view(x, _3foptions)
    return pp(x, make_options(x, _3foptions), 0)
  end
  return view
end
package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(...)
  local view = require("fennel.view")
  local version = "1.3.0"
  local function luajit_vm_3f()
    return ((nil ~= _G.jit) and (type(_G.jit) == "table") and (nil ~= _G.jit.on) and (nil ~= _G.jit.off) and (type(_G.jit.version_num) == "number"))
  end
  local function luajit_vm_version()
    local jit_os
    if (_G.jit.os == "OSX") then
      jit_os = "macOS"
    else
      jit_os = _G.jit.os
    end
    return (_G.jit.version .. " " .. jit_os .. "/" .. _G.jit.arch)
  end
  local function fengari_vm_3f()
    return ((nil ~= _G.fengari) and (type(_G.fengari) == "table") and (nil ~= _G.fengari.VERSION) and (type(_G.fengari.VERSION_NUM) == "number"))
  end
  local function fengari_vm_version()
    return (_G.fengari.RELEASE .. " (" .. _VERSION .. ")")
  end
  local function lua_vm_version()
    if luajit_vm_3f() then
      return luajit_vm_version()
    elseif fengari_vm_3f() then
      return fengari_vm_version()
    else
      return ("PUC " .. _VERSION)
    end
  end
  local function runtime_version()
    return ("Fennel " .. version .. " on " .. lua_vm_version())
  end
  local function warn(message)
    if (_G.io and _G.io.stderr) then
      return (_G.io.stderr):write(("--WARNING: %s\n"):format(tostring(message)))
    else
      return nil
    end
  end
  local len
  do
    local _112_, _113_ = pcall(require, "utf8")
    if ((_112_ == true) and (nil ~= _113_)) then
      local utf8 = _113_
      len = utf8.len
    elseif true then
      local _ = _112_
      len = string.len
    else
      len = nil
    end
  end
  local function mt_keys_in_order(t, out, used_keys)
    for _, k in ipairs(getmetatable(t).keys) do
      if (t[k] and not used_keys[k]) then
        used_keys[k] = true
        table.insert(out, k)
      else
      end
    end
    for k in pairs(t) do
      if not used_keys[k] then
        table.insert(out, k)
      else
      end
    end
    return out
  end
  local function stablepairs(t)
    local keys
    local _118_
    do
      local t_117_ = getmetatable(t)
      if (nil ~= t_117_) then
        t_117_ = (t_117_).keys
      else
      end
      _118_ = t_117_
    end
    if _118_ then
      keys = mt_keys_in_order(t, {}, {})
    else
      local _120_
      do
        local tbl_16_auto = {}
        local i_17_auto = #tbl_16_auto
        for k in pairs(t) do
          local val_18_auto = k
          if (nil ~= val_18_auto) then
            i_17_auto = (i_17_auto + 1)
            do end (tbl_16_auto)[i_17_auto] = val_18_auto
          else
          end
        end
        _120_ = tbl_16_auto
      end
      local function _122_(_241, _242)
        return (tostring(_241) < tostring(_242))
      end
      table.sort(_120_, _122_)
      keys = _120_
    end
    local succ
    do
      local tbl_13_auto = {}
      for i, k in ipairs(keys) do
        local k_14_auto, v_15_auto = k, keys[(i + 1)]
        if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
          tbl_13_auto[k_14_auto] = v_15_auto
        else
        end
      end
      succ = tbl_13_auto
    end
    local function stablenext(tbl, key)
      local next_key
      if (key == nil) then
        next_key = keys[1]
      else
        next_key = succ[key]
      end
      return next_key, tbl[next_key]
    end
    return stablenext, t, nil
  end
  local function get_in(tbl, path, _3ffallback)
    assert(("table" == type(tbl)), "get-in expects path to be a table")
    if (0 == #path) then
      return _3ffallback
    else
      local _126_
      do
        local t = tbl
        for _, k in ipairs(path) do
          if (nil == t) then break end
          local _127_ = type(t)
          if (_127_ == "table") then
            t = t[k]
          else
            t = nil
          end
        end
        _126_ = t
      end
      if (nil ~= _126_) then
        local res = _126_
        return res
      elseif true then
        local _ = _126_
        return _3ffallback
      else
        return nil
      end
    end
  end
  local function map(t, f, _3fout)
    local out = (_3fout or {})
    local f0
    if (type(f) == "function") then
      f0 = f
    else
      local function _131_(_241)
        return (_241)[f]
      end
      f0 = _131_
    end
    for _, x in ipairs(t) do
      local _133_ = f0(x)
      if (nil ~= _133_) then
        local v = _133_
        table.insert(out, v)
      else
      end
    end
    return out
  end
  local function kvmap(t, f, _3fout)
    local out = (_3fout or {})
    local f0
    if (type(f) == "function") then
      f0 = f
    else
      local function _135_(_241)
        return (_241)[f]
      end
      f0 = _135_
    end
    for k, x in stablepairs(t) do
      local _137_, _138_ = f0(k, x)
      if ((nil ~= _137_) and (nil ~= _138_)) then
        local key = _137_
        local value = _138_
        out[key] = value
      elseif (nil ~= _137_) then
        local value = _137_
        table.insert(out, value)
      else
      end
    end
    return out
  end
  local function copy(from, _3fto)
    local tbl_13_auto = (_3fto or {})
    for k, v in pairs((from or {})) do
      local k_14_auto, v_15_auto = k, v
      if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
        tbl_13_auto[k_14_auto] = v_15_auto
      else
      end
    end
    return tbl_13_auto
  end
  local function member_3f(x, tbl, _3fn)
    local _141_ = tbl[(_3fn or 1)]
    if (_141_ == x) then
      return true
    elseif (_141_ == nil) then
      return nil
    elseif true then
      local _ = _141_
      return member_3f(x, tbl, ((_3fn or 1) + 1))
    else
      return nil
    end
  end
  local function maxn(tbl)
    local max = 0
    for k in pairs(tbl) do
      if ("number" == type(k)) then
        max = math.max(max, k)
      else
        max = max
      end
    end
    return max
  end
  local function every_3f(predicate, seq)
    local result = true
    for _, item in ipairs(seq) do
      if not result then break end
      result = predicate(item)
    end
    return result
  end
  local function allpairs(tbl)
    assert((type(tbl) == "table"), "allpairs expects a table")
    local t = tbl
    local seen = {}
    local function allpairs_next(_, state)
      local next_state, value = next(t, state)
      if seen[next_state] then
        return allpairs_next(nil, next_state)
      elseif next_state then
        seen[next_state] = true
        return next_state, value
      else
        local _144_ = getmetatable(t)
        if ((_G.type(_144_) == "table") and true) then
          local __index = (_144_).__index
          if ("table" == type(__index)) then
            t = __index
            return allpairs_next(t)
          else
            return nil
          end
        else
          return nil
        end
      end
    end
    return allpairs_next
  end
  local function deref(self)
    return self[1]
  end
  local nil_sym = nil
  local function list__3estring(self, _3fview, _3foptions, _3findent)
    local safe = {}
    local view0
    if _3fview then
      local function _148_(_241)
        return _3fview(_241, _3foptions, _3findent)
      end
      view0 = _148_
    else
      view0 = view
    end
    local max = maxn(self)
    for i = 1, max do
      safe[i] = (((self[i] == nil) and nil_sym) or self[i])
    end
    return ("(" .. table.concat(map(safe, view0), " ", 1, max) .. ")")
  end
  local function comment_view(c)
    return c, true
  end
  local function sym_3d(a, b)
    return ((deref(a) == deref(b)) and (getmetatable(a) == getmetatable(b)))
  end
  local function sym_3c(a, b)
    return (a[1] < tostring(b))
  end
  local symbol_mt = {__fennelview = deref, __tostring = deref, __eq = sym_3d, __lt = sym_3c, "SYMBOL"}
  local expr_mt
  local function _150_(x)
    return tostring(deref(x))
  end
  expr_mt = {__tostring = _150_, "EXPR"}
  local list_mt = {__fennelview = list__3estring, __tostring = list__3estring, "LIST"}
  local comment_mt = {__fennelview = comment_view, __tostring = deref, __eq = sym_3d, __lt = sym_3c, "COMMENT"}
  local sequence_marker = {"SEQUENCE"}
  local varg_mt = {__fennelview = deref, __tostring = deref, "VARARG"}
  local getenv
  local function _151_()
    return nil
  end
  getenv = ((os and os.getenv) or _151_)
  local function debug_on_3f(flag)
    local level = (getenv("FENNEL_DEBUG") or "")
    return ((level == "all") or level:find(flag))
  end
  local function list(...)
    return setmetatable({...}, list_mt)
  end
  local function sym(str, _3fsource)
    local _152_
    do
      local tbl_13_auto = {str}
      for k, v in pairs((_3fsource or {})) do
        local k_14_auto, v_15_auto = nil, nil
        if (type(k) == "string") then
          k_14_auto, v_15_auto = k, v
        else
          k_14_auto, v_15_auto = nil
        end
        if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
          tbl_13_auto[k_14_auto] = v_15_auto
        else
        end
      end
      _152_ = tbl_13_auto
    end
    return setmetatable(_152_, symbol_mt)
  end
  nil_sym = sym("nil")
  local function sequence(...)
    local function _155_(seq, view0, inspector, indent)
      local opts
      do
        local _156_ = inspector
        _156_["empty-as-sequence?"] = {once = true, after = inspector["empty-as-sequence?"]}
        _156_["metamethod?"] = {once = false, after = inspector["metamethod?"]}
        opts = _156_
      end
      return view0(seq, opts, indent)
    end
    return setmetatable({...}, {sequence = sequence_marker, __fennelview = _155_})
  end
  local function expr(strcode, etype)
    return setmetatable({type = etype, strcode}, expr_mt)
  end
  local function comment_2a(contents, _3fsource)
    local _let_157_ = (_3fsource or {})
    local filename = _let_157_["filename"]
    local line = _let_157_["line"]
    return setmetatable({filename = filename, line = line, contents}, comment_mt)
  end
  local function varg(_3fsource)
    local _158_
    do
      local tbl_13_auto = {"..."}
      for k, v in pairs((_3fsource or {})) do
        local k_14_auto, v_15_auto = nil, nil
        if (type(k) == "string") then
          k_14_auto, v_15_auto = k, v
        else
          k_14_auto, v_15_auto = nil
        end
        if ((k_14_auto ~= nil) and (v_15_auto ~= nil)) then
          tbl_13_auto[k_14_auto] = v_15_auto
        else
        end
      end
      _158_ = tbl_13_auto
    end
    return setmetatable(_158_, varg_mt)
  end
  local function expr_3f(x)
    return ((type(x) == "table") and (getmetatable(x) == expr_mt) and x)
  end
  local function varg_3f(x)
    return ((type(x) == "table") and (getmetatable(x) == varg_mt) and x)
  end
  local function list_3f(x)
    return ((type(x) == "table") and (getmetatable(x) == list_mt) and x)
  end
  local function sym_3f(x)
    return ((type(x) == "table") and (getmetatable(x) == symbol_mt) and x)
  end
  local function sequence_3f(x)
    local mt = ((type(x) == "table") and getmetatable(x))
    return (mt and (mt.sequence == sequence_marker) and x)
  end
  local function comment_3f(x)
    return ((type(x) == "table") and (getmetatable(x) == comment_mt) and x)
  end
  local function table_3f(x)
    return ((type(x) == "table") and not varg_3f(x) and (getmetatable(x) ~= list_mt) and (getmetatable(x) ~= symbol_mt) and not comment_3f(x) and x)
  end
  local function string_3f(x)
    return (type(x) == "string")
  end
  local function multi_sym_3f(str)
    if sym_3f(str) then
      return multi_sym_3f(tostring(str))
    elseif (type(str) ~= "string") then
      return false
    else
      local function _161_()
        local parts = {}
        for part in str:gmatch("[^%.%:]+[%.%:]?") do
          local last_char = part:sub(( - 1))
          if (last_char == ":") then
            parts["multi-sym-method-call"] = true
          else
          end
          if ((last_char == ":") or (last_char == ".")) then
            parts[(#parts + 1)] = part:sub(1, ( - 2))
          else
            parts[(#parts + 1)] = part
          end
        end
        return ((0 < #parts) and parts)
      end
      return ((str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and _161_())
    end
  end
  local function quoted_3f(symbol)
    return symbol.quoted
  end
  local function idempotent_expr_3f(x)
    return ((type(x) == "string") or (type(x) == "integer") or (type(x) == "number") or (sym_3f(x) and not multi_sym_3f(x)))
  end
  local function ast_source(ast)
    if (table_3f(ast) or sequence_3f(ast)) then
      return (getmetatable(ast) or {})
    elseif ("table" == type(ast)) then
      return ast
    else
      return {}
    end
  end
  local function walk_tree(root, f, _3fcustom_iterator)
    local function walk(iterfn, parent, idx, node)
      if f(idx, node, parent) then
        for k, v in iterfn(node) do
          walk(iterfn, node, k, v)
        end
        return nil
      else
        return nil
      end
    end
    walk((_3fcustom_iterator or pairs), nil, nil, root)
    return root
  end
  local lua_keywords = {"and", "break", "do", "else", "elseif", "end", "false", "for", "function", "if", "in", "local", "nil", "not", "or", "repeat", "return", "then", "true", "until", "while", "goto"}
  for i, v in ipairs(lua_keywords) do
    lua_keywords[v] = i
  end
  local function valid_lua_identifier_3f(str)
    return (str:match("^[%a_][%w_]*$") and not lua_keywords[str])
  end
  local propagated_options = {"allowedGlobals", "indent", "correlate", "useMetadata", "env", "compiler-env", "compilerEnv"}
  local function propagate_options(options, subopts)
    for _, name in ipairs(propagated_options) do
      subopts[name] = options[name]
    end
    return subopts
  end
  local root
  local function _167_()
  end
  root = {chunk = nil, scope = nil, options = nil, reset = _167_}
  root["set-reset"] = function(_168_)
    local _arg_169_ = _168_
    local chunk = _arg_169_["chunk"]
    local scope = _arg_169_["scope"]
    local options = _arg_169_["options"]
    local reset = _arg_169_["reset"]
    root.reset = function()
      root.chunk, root.scope, root.options, root.reset = chunk, scope, options, reset
      return nil
    end
    return root.reset
  end
  local warned = {}
  local function check_plugin_version(_170_)
    local _arg_171_ = _170_
    local name = _arg_171_["name"]
    local versions = _arg_171_["versions"]
    local plugin = _arg_171_
    if (not member_3f(version:gsub("-dev", ""), (versions or {})) and not warned[plugin]) then
      warned[plugin] = true
      return warn(string.format("plugin %s does not support Fennel version %s", (name or "unknown"), version))
    else
      return nil
    end
  end
  local function hook_opts(event, _3foptions, ...)
    local plugins
    local function _174_(...)
      local t_173_ = _3foptions
      if (nil ~= t_173_) then
        t_173_ = (t_173_).plugins
      else
      end
      return t_173_
    end
    local function _177_(...)
      local t_176_ = root.options
      if (nil ~= t_176_) then
        t_176_ = (t_176_).plugins
      else
      end
      return t_176_
    end
    plugins = (_174_(...) or _177_(...))
    if plugins then
      local result = nil
      for _, plugin in ipairs(plugins) do
        if result then break end
        check_plugin_version(plugin)
        local _179_ = plugin[event]
        if (nil ~= _179_) then
          local f = _179_
          result = f(...)
        else
          result = nil
        end
      end
      return result
    else
      return nil
    end
  end
  local function hook(event, ...)
    return hook_opts(event, root.options, ...)
  end
  return {warn = warn, allpairs = allpairs, stablepairs = stablepairs, copy = copy, ["get-in"] = get_in, kvmap = kvmap, map = map, ["walk-tree"] = walk_tree, ["member?"] = member_3f, maxn = maxn, ["every?"] = every_3f, list = list, sequence = sequence, sym = sym, varg = varg, expr = expr, comment = comment_2a, ["comment?"] = comment_3f, ["expr?"] = expr_3f, ["list?"] = list_3f, ["multi-sym?"] = multi_sym_3f, ["sequence?"] = sequence_3f, ["sym?"] = sym_3f, ["table?"] = table_3f, ["varg?"] = varg_3f, ["quoted?"] = quoted_3f, ["string?"] = string_3f, ["idempotent-expr?"] = idempotent_expr_3f, ["valid-lua-identifier?"] = valid_lua_identifier_3f, ["lua-keywords"] = lua_keywords, hook = hook, ["hook-opts"] = hook_opts, ["propagate-options"] = propagate_options, root = root, ["debug-on?"] = debug_on_3f, ["ast-source"] = ast_source, version = version, ["runtime-version"] = runtime_version, len = len, path = table.concat({"./?.fnl", "./?/init.fnl", getenv("FENNEL_PATH")}, ";"), ["macro-path"] = table.concat({"./?.fnl", "./?/init-macros.fnl", "./?/init.fnl", getenv("FENNEL_MACRO_PATH")}, ";")}
end
utils = require("fennel.utils")
local parser = require("fennel.parser")
local compiler = require("fennel.compiler")
local specials = require("fennel.specials")
local repl = require("fennel.repl")
local view = require("fennel.view")
local function eval_env(env, opts)
  if (env == "_COMPILER") then
    local env0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {}, opts)
    if (opts.allowedGlobals == nil) then
      opts.allowedGlobals = specials["current-global-names"](env0)
    else
    end
    return specials["wrap-env"](env0)
  else
    return (env and specials["wrap-env"](env))
  end
end
local function eval_opts(options, str)
  local opts = utils.copy(options)
  if (opts.allowedGlobals == nil) then
    opts.allowedGlobals = specials["current-global-names"](opts.env)
  else
  end
  if (not opts.filename and not opts.source) then
    opts.source = str
  else
  end
  if (opts.env == "_COMPILER") then
    opts.scope = compiler["make-scope"](compiler.scopes.compiler)
  else
  end
  return opts
end
local function eval(str, options, ...)
  local opts = eval_opts(options, str)
  local env = eval_env(opts.env, opts)
  local lua_source = compiler["compile-string"](str, opts)
  local loader
  local function _753_(...)
    if opts.filename then
      return ("@" .. opts.filename)
    else
      return str
    end
  end
  loader = specials["load-code"](lua_source, env, _753_(...))
  opts.filename = nil
  return loader(...)
end
local function dofile_2a(filename, options, ...)
  local opts = utils.copy(options)
  local f = assert(io.open(filename, "rb"))
  local source = assert(f:read("*all"), ("Could not read " .. filename))
  f:close()
  opts.filename = filename
  return eval(source, opts, ...)
end
local function syntax()
  local body_3f = {"when", "with-open", "collect", "icollect", "fcollect", "lambda", "\206\187", "macro", "match", "match-try", "case", "case-try", "accumulate", "faccumulate", "doto"}
  local binding_3f = {"collect", "icollect", "fcollect", "each", "for", "let", "with-open", "accumulate", "faccumulate"}
  local define_3f = {"fn", "lambda", "\206\187", "var", "local", "macro", "macros", "global"}
  local out = {}
  for k, v in pairs(compiler.scopes.global.specials) do
    local metadata = (compiler.metadata[v] or {})
    do end (out)[k] = {["special?"] = true, ["body-form?"] = metadata["fnl/body-form?"], ["binding-form?"] = utils["member?"](k, binding_3f), ["define?"] = utils["member?"](k, define_3f)}
  end
  for k, v in pairs(compiler.scopes.global.macros) do
    out[k] = {["macro?"] = true, ["body-form?"] = utils["member?"](k, body_3f), ["binding-form?"] = utils["member?"](k, binding_3f), ["define?"] = utils["member?"](k, define_3f)}
  end
  for k, v in pairs(_G) do
    local _754_ = type(v)
    if (_754_ == "function") then
      out[k] = {["global?"] = true, ["function?"] = true}
    elseif (_754_ == "table") then
      for k2, v2 in pairs(v) do
        if (("function" == type(v2)) and (k ~= "_G")) then
          out[(k .. "." .. k2)] = {["function?"] = true, ["global?"] = true}
        else
        end
      end
      out[k] = {["global?"] = true}
    else
    end
  end
  return out
end
local mod = {list = utils.list, ["list?"] = utils["list?"], sym = utils.sym, ["sym?"] = utils["sym?"], ["multi-sym?"] = utils["multi-sym?"], sequence = utils.sequence, ["sequence?"] = utils["sequence?"], ["table?"] = utils["table?"], comment = utils.comment, ["comment?"] = utils["comment?"], varg = utils.varg, ["varg?"] = utils["varg?"], ["sym-char?"] = parser["sym-char?"], parser = parser.parser, compile = compiler.compile, ["compile-string"] = compiler["compile-string"], ["compile-stream"] = compiler["compile-stream"], eval = eval, repl = repl, view = view, dofile = dofile_2a, ["load-code"] = specials["load-code"], doc = specials.doc, metadata = compiler.metadata, traceback = compiler.traceback, version = utils.version, ["runtime-version"] = utils["runtime-version"], ["ast-source"] = utils["ast-source"], path = utils.path, ["macro-path"] = utils["macro-path"], ["macro-loaded"] = specials["macro-loaded"], ["macro-searchers"] = specials["macro-searchers"], ["search-module"] = specials["search-module"], ["make-searcher"] = specials["make-searcher"], searcher = specials["make-searcher"](), syntax = syntax, gensym = compiler.gensym, scope = compiler["make-scope"], mangle = compiler["global-mangling"], unmangle = compiler["global-unmangling"], compile1 = compiler.compile1, ["string-stream"] = parser["string-stream"], granulate = parser.granulate, loadCode = specials["load-code"], make_searcher = specials["make-searcher"], makeSearcher = specials["make-searcher"], searchModule = specials["search-module"], macroPath = utils["macro-path"], macroSearchers = specials["macro-searchers"], macroLoaded = specials["macro-loaded"], compileStream = compiler["compile-stream"], compileString = compiler["compile-string"], stringStream = parser["string-stream"], runtimeVersion = utils["runtime-version"]}
mod.install = function(_3fopts)
  table.insert((package.searchers or package.loaders), specials["make-searcher"](_3fopts))
  return mod
end
utils["fennel-module"] = mod
do
  local module_name = "fennel.macros"
  local _
  local function _757_()
    return mod
  end
  package.preload[module_name] = _757_
  _ = nil
  local env
  do
    local _758_ = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
    do end (_758_)["utils"] = utils
    _758_["fennel"] = mod
    env = _758_
  end
  local built_ins = eval([===[;; These macros are awkward because their definition cannot rely on the any
  ;; built-in macros, only special forms. (no when, no icollect, etc)
  
  (fn copy [t]
    (let [out []]
      (each [_ v (ipairs t)] (table.insert out v))
      (setmetatable out (getmetatable t))))
  
  (fn ->* [val ...]
    "Thread-first macro.
  Take the first value and splice it into the second form as its first argument.
  The value of the second form is spliced into the first arg of the third, etc."
    (var x val)
    (each [_ e (ipairs [...])]
      (let [elt (if (list? e) (copy e) (list e))]
        (table.insert elt 2 x)
        (set x elt)))
    x)
  
  (fn ->>* [val ...]
    "Thread-last macro.
  Same as ->, except splices the value into the last position of each form
  rather than the first."
    (var x val)
    (each [_ e (ipairs [...])]
      (let [elt (if (list? e) (copy e) (list e))]
        (table.insert elt x)
        (set x elt)))
    x)
  
  (fn -?>* [val ?e ...]
    "Nil-safe thread-first macro.
  Same as -> except will short-circuit with nil when it encounters a nil value."
    (if (= nil ?e)
        val
        (let [el (if (list? ?e) (copy ?e) (list ?e))
              tmp (gensym)]
          (table.insert el 2 tmp)
          `(let [,tmp ,val]
             (if (not= nil ,tmp)
                 (-?> ,el ,...)
                 ,tmp)))))
  
  (fn -?>>* [val ?e ...]
    "Nil-safe thread-last macro.
  Same as ->> except will short-circuit with nil when it encounters a nil value."
    (if (= nil ?e)
        val
        (let [el (if (list? ?e) (copy ?e) (list ?e))
              tmp (gensym)]
          (table.insert el tmp)
          `(let [,tmp ,val]
             (if (not= ,tmp nil)
                 (-?>> ,el ,...)
                 ,tmp)))))
  
  (fn ?dot [tbl ...]
    "Nil-safe table look up.
  Same as . (dot), except will short-circuit with nil when it encounters
  a nil value in any of subsequent keys."
    (let [head (gensym :t)
          lookups `(do
                     (var ,head ,tbl)
                     ,head)]
      (each [_ k (ipairs [...])]
        ;; Kinda gnarly to reassign in place like this, but it emits the best lua.
        ;; With this impl, it emits a flat, concise, and readable set of ifs
        (table.insert lookups (# lookups) `(if (not= nil ,head)
                                             (set ,head (. ,head ,k)))))
      lookups))
  
  (fn doto* [val ...]
    "Evaluate val and splice it into the first argument of subsequent forms."
    (assert (not= val nil) "missing subject")
    (let [rebind? (or (not (sym? val))
                      (multi-sym? val))
          name (if rebind? (gensym)            val)
          form (if rebind? `(let [,name ,val]) `(do))]
      (each [_ elt (ipairs [...])]
        (let [elt (if (list? elt) (copy elt) (list elt))]
          (table.insert elt 2 name)
          (table.insert form elt)))
      (table.insert form name)
      form))
  
  (fn when* [condition body1 ...]
    "Evaluate body for side-effects only when condition is truthy."
    (assert body1 "expected body")
    `(if ,condition
         (do
           ,body1
           ,...)))
  
  (fn with-open* [closable-bindings ...]
    "Like `let`, but invokes (v:close) on each binding after evaluating the body.
  The body is evaluated inside `xpcall` so that bound values will be closed upon
  encountering an error before propagating it."
    (let [bodyfn `(fn []
                    ,...)
          closer `(fn close-handlers# [ok# ...]
                    (if ok# ... (error ... 0)))
          traceback `(. (or package.loaded.fennel debug) :traceback)]
      (for [i 1 (length closable-bindings) 2]
        (assert (sym? (. closable-bindings i))
                "with-open only allows symbols in bindings")
        (table.insert closer 4 `(: ,(. closable-bindings i) :close)))
      `(let ,closable-bindings
         ,closer
         (close-handlers# (_G.xpcall ,bodyfn ,traceback)))))
  
  (fn extract-into [iter-tbl]
    (var (into iter-out found?) (values [] (copy iter-tbl)))
    (for [i (length iter-tbl) 2 -1]
      (let [item (. iter-tbl i)]
        (if (or (= `&into item)
                (= :into  item))
            (do
              (assert (not found?) "expected only one &into clause")
              (set found? true)
              (set into (. iter-tbl (+ i 1)))
              (table.remove iter-out i)
              (table.remove iter-out i)))))
    (assert (or (not found?) (sym? into) (table? into) (list? into))
            "expected table, function call, or symbol in &into clause")
    (values into iter-out))
  
  (fn collect* [iter-tbl key-expr value-expr ...]
    "Return a table made by running an iterator and evaluating an expression that
  returns key-value pairs to be inserted sequentially into the table.  This can
  be thought of as a table comprehension. The body should provide two expressions
  (used as key and value) or nil, which causes it to be omitted.
  
  For example,
    (collect [k v (pairs {:apple \"red\" :orange \"orange\"})]
      (values v k))
  returns
    {:red \"apple\" :orange \"orange\"}
  
  Supports an &into clause after the iterator to put results in an existing table.
  Supports early termination with an &until clause."
    (assert (and (sequence? iter-tbl) (<= 2 (length iter-tbl)))
            "expected iterator binding table")
    (assert (not= nil key-expr) "expected key and value expression")
    (assert (= nil ...)
            "expected 1 or 2 body expressions; wrap multiple expressions with do")
    (let [kv-expr (if (= nil value-expr) key-expr `(values ,key-expr ,value-expr))
          (into iter) (extract-into iter-tbl)]
      `(let [tbl# ,into]
         (each ,iter
           (let [(k# v#) ,kv-expr]
             (if (and (not= k# nil) (not= v# nil))
               (tset tbl# k# v#))))
         tbl#)))
  
  (fn seq-collect [how iter-tbl value-expr ...]
    "Common part between icollect and fcollect for producing sequential tables.
  
  Iteration code only differs in using the for or each keyword, the rest
  of the generated code is identical."
    (assert (not= nil value-expr) "expected table value expression")
    (assert (= nil ...)
            "expected exactly one body expression. Wrap multiple expressions in do")
    (let [(into iter) (extract-into iter-tbl)]
      `(let [tbl# ,into]
         ;; believe it or not, using a var here has a pretty good performance
         ;; boost: https://p.hagelb.org/icollect-performance.html
         (var i# (length tbl#))
         (,how ,iter
               (let [val# ,value-expr]
                 (when (not= nil val#)
                   (set i# (+ i# 1))
                   (tset tbl# i# val#))))
         tbl#)))
  
  (fn icollect* [iter-tbl value-expr ...]
    "Return a sequential table made by running an iterator and evaluating an
  expression that returns values to be inserted sequentially into the table.
  This can be thought of as a table comprehension. If the body evaluates to nil
  that element is omitted.
  
  For example,
    (icollect [_ v (ipairs [1 2 3 4 5])]
      (when (not= v 3)
        (* v v)))
  returns
    [1 4 16 25]
  
  Supports an &into clause after the iterator to put results in an existing table.
  Supports early termination with an &until clause."
    (assert (and (sequence? iter-tbl) (<= 2 (length iter-tbl)))
            "expected iterator binding table")
    (seq-collect 'each iter-tbl value-expr ...))
  
  (fn fcollect* [iter-tbl value-expr ...]
    "Return a sequential table made by advancing a range as specified by
  for, and evaluating an expression that returns values to be inserted
  sequentially into the table.  This can be thought of as a range
  comprehension. If the body evaluates to nil that element is omitted.
  
  For example,
    (fcollect [i 1 10 2]
      (when (not= i 3)
        (* i i)))
  returns
    [1 25 49 81]
  
  Supports an &into clause after the range to put results in an existing table.
  Supports early termination with an &until clause."
    (assert (and (sequence? iter-tbl) (< 2 (length iter-tbl)))
            "expected range binding table")
    (seq-collect 'for iter-tbl value-expr ...))
  
  (fn accumulate-impl [for? iter-tbl body ...]
    (assert (and (sequence? iter-tbl) (<= 4 (length iter-tbl)))
            "expected initial value and iterator binding table")
    (assert (not= nil body) "expected body expression")
    (assert (= nil ...)
            "expected exactly one body expression. Wrap multiple expressions with do")
    (let [[accum-var accum-init] iter-tbl
          iter (sym (if for? "for" "each"))] ; accumulate or faccumulate?
      `(do
         (var ,accum-var ,accum-init)
         (,iter ,[(unpack iter-tbl 3)]
                (set ,accum-var ,body))
         ,(if (list? accum-var)
            (list (sym :values) (unpack accum-var))
            accum-var))))
  
  (fn accumulate* [iter-tbl body ...]
    "Accumulation macro.
  
  It takes a binding table and an expression as its arguments.  In the binding
  table, the first form starts out bound to the second value, which is an initial
  accumulator. The rest are an iterator binding table in the format `each` takes.
  
  It runs through the iterator in each step of which the given expression is
  evaluated, and the accumulator is set to the value of the expression. It
  eventually returns the final value of the accumulator.
  
  For example,
    (accumulate [total 0
                 _ n (pairs {:apple 2 :orange 3})]
      (+ total n))
  returns 5"
    (accumulate-impl false iter-tbl body ...))
  
  (fn faccumulate* [iter-tbl body ...]
    "Identical to accumulate, but after the accumulator the binding table is the
  same as `for` instead of `each`. Like collect to fcollect, will iterate over a
  numerical range like `for` rather than an iterator."
    (accumulate-impl true iter-tbl body ...))
  
  (fn double-eval-safe? [x type]
    (or (= :number type) (= :string type) (= :boolean type)
        (and (sym? x) (not (multi-sym? x)))))
  
  (fn partial* [f ...]
    "Return a function with all arguments partially applied to f."
    (assert f "expected a function to partially apply")
    (let [bindings []
          args []]
      (each [_ arg (ipairs [...])]
        (if (double-eval-safe? arg (type arg))
          (table.insert args arg)
          (let [name (gensym)]
            (table.insert bindings name)
            (table.insert bindings arg)
            (table.insert args name))))
      (let [body (list f (unpack args))]
        (table.insert body _VARARG)
        ;; only use the extra let if we need double-eval protection
        (if (= 0 (length bindings))
            `(fn [,_VARARG] ,body)
            `(let ,bindings
               (fn [,_VARARG] ,body))))))
  
  (fn pick-args* [n f]
    "Create a function of arity n that applies its arguments to f.
  
  For example,
    (pick-args 2 func)
  expands to
    (fn [_0_ _1_] (func _0_ _1_))"
    (if (and _G.io _G.io.stderr)
        (_G.io.stderr:write
         "-- WARNING: pick-args is deprecated and will be removed in the future.\n"))
    (assert (and (= (type n) :number) (= n (math.floor n)) (<= 0 n))
            (.. "Expected n to be an integer literal >= 0, got " (tostring n)))
    (let [bindings []]
      (for [i 1 n]
        (tset bindings i (gensym)))
      `(fn ,bindings
         (,f ,(unpack bindings)))))
  
  (fn pick-values* [n ...]
    "Evaluate to exactly n values.
  
  For example,
    (pick-values 2 ...)
  expands to
    (let [(_0_ _1_) ...]
      (values _0_ _1_))"
    (assert (and (= :number (type n)) (<= 0 n) (= n (math.floor n)))
            (.. "Expected n to be an integer >= 0, got " (tostring n)))
    (let [let-syms (list)
          let-values (if (= 1 (select "#" ...)) ... `(values ,...))]
      (for [i 1 n]
        (table.insert let-syms (gensym)))
      (if (= n 0) `(values)
          `(let [,let-syms ,let-values]
             (values ,(unpack let-syms))))))
  
  (fn lambda* [...]
    "Function literal with nil-checked arguments.
  Like `fn`, but will throw an exception if a declared argument is passed in as
  nil, unless that argument's name begins with a question mark."
    (let [args [...]
          has-internal-name? (sym? (. args 1))
          arglist (if has-internal-name? (. args 2) (. args 1))
          docstring-position (if has-internal-name? 3 2)
          has-docstring? (and (< docstring-position (length args))
                              (= :string (type (. args docstring-position))))
          arity-check-position (- 4 (if has-internal-name? 0 1)
                                  (if has-docstring? 0 1))
          empty-body? (< (length args) arity-check-position)]
      (fn check! [a]
        (if (table? a)
            (each [_ a (pairs a)]
              (check! a))
            (let [as (tostring a)]
              (and (not (as:match "^?")) (not= as "&") (not= as "_")
                   (not= as "...") (not= as "&as")))
            (table.insert args arity-check-position
                          `(_G.assert (not= nil ,a)
                                      ,(: "Missing argument %s on %s:%s" :format
                                          (tostring a)
                                          (or a.filename :unknown)
                                          (or a.line "?"))))))
  
      (assert (= :table (type arglist)) "expected arg list")
      (each [_ a (ipairs arglist)]
        (check! a))
      (if empty-body?
          (table.insert args (sym :nil)))
      `(fn ,(unpack args))))
  
  (fn macro* [name ...]
    "Define a single macro."
    (assert (sym? name) "expected symbol for macro name")
    (local args [...])
    `(macros {,(tostring name) (fn ,(unpack args))}))
  
  (fn macrodebug* [form return?]
    "Print the resulting form after performing macroexpansion.
  With a second argument, returns expanded form as a string instead of printing."
    (let [handle (if return? `do `print)]
      `(,handle ,(view (macroexpand form _SCOPE)))))
  
  (fn import-macros* [binding1 module-name1 ...]
    "Bind a table of macros from each macro module according to a binding form.
  Each binding form can be either a symbol or a k/v destructuring table.
  Example:
    (import-macros mymacros                 :my-macros    ; bind to symbol
                   {:macro1 alias : macro2} :proj.macros) ; import by name"
    (assert (and binding1 module-name1 (= 0 (% (select "#" ...) 2)))
            "expected even number of binding/modulename pairs")
    (for [i 1 (select "#" binding1 module-name1 ...) 2]
      ;; delegate the actual loading of the macros to the require-macros
      ;; special which already knows how to set up the compiler env and stuff.
      ;; this is weird because require-macros is deprecated but it works.
      (let [(binding modname) (select i binding1 module-name1 ...)
            scope (get-scope)
            ;; if the module-name is an expression (and not just a string) we
            ;; patch our expression to have the correct source filename so
            ;; require-macros can pass it down when resolving the module-name.
            expr `(import-macros ,modname)
            filename (if (list? modname) (. modname 1 :filename) :unknown)
            _ (tset expr :filename filename)
            macros* (_SPECIALS.require-macros expr scope {} binding)]
        (if (sym? binding)
            ;; bind whole table of macros to table bound to symbol
            (tset scope.macros (. binding 1) macros*)
            ;; 1-level table destructuring for importing individual macros
            (table? binding)
            (each [macro-name [import-key] (pairs binding)]
              (assert (= :function (type (. macros* macro-name)))
                      (.. "macro " macro-name " not found in module "
                          (tostring modname)))
              (tset scope.macros import-key (. macros* macro-name))))))
    nil)
  
  {:-> ->*
   :->> ->>*
   :-?> -?>*
   :-?>> -?>>*
   :?. ?dot
   :doto doto*
   :when when*
   :with-open with-open*
   :collect collect*
   :icollect icollect*
   :fcollect fcollect*
   :accumulate accumulate*
   :faccumulate faccumulate*
   :partial partial*
   :lambda lambda*
   :λ lambda*
   :pick-args pick-args*
   :pick-values pick-values*
   :macro macro*
   :macrodebug macrodebug*
   :import-macros import-macros*}
  ]===], {env = env, scope = compiler.scopes.compiler, useMetadata = true, filename = "src/fennel/macros.fnl", moduleName = module_name})
  local _0
  for k, v in pairs(built_ins) do
    compiler.scopes.global.macros[k] = v
  end
  _0 = nil
  local match_macros = eval([===[;;; Pattern matching
  ;; This is separated out so we can use the "core" macros during the
  ;; implementation of pattern matching.
  
  (fn copy [t] (collect [k v (pairs t)] k v))
  
  (fn with [opts k]
    (doto (copy opts) (tset k true)))
  
  (fn without [opts k]
    (doto (copy opts) (tset k nil)))
  
  (fn case-values [vals pattern unifications case-pattern opts]
    (let [condition `(and)
          bindings []]
      (each [i pat (ipairs pattern)]
        (let [(subcondition subbindings) (case-pattern [(. vals i)] pat
                                                        unifications (without opts :multival?))]
          (table.insert condition subcondition)
          (icollect [_ b (ipairs subbindings) &into bindings] b)))
      (values condition bindings)))
  
  (fn case-table [val pattern unifications case-pattern opts]
    (let [condition `(and (= (_G.type ,val) :table))
          bindings []]
      (each [k pat (pairs pattern)]
        (if (= pat `&)
            (let [rest-pat (. pattern (+ k 1))
                  rest-val `(select ,k ((or table.unpack _G.unpack) ,val))
                  subcondition (case-table `(pick-values 1 ,rest-val)
                                            rest-pat unifications case-pattern
                                            (without opts :multival?))]
              (if (not (sym? rest-pat))
                  (table.insert condition subcondition))
              (assert (= nil (. pattern (+ k 2)))
                      "expected & rest argument before last parameter")
              (table.insert bindings rest-pat)
              (table.insert bindings [rest-val]))
            (= k `&as)
            (do
              (table.insert bindings pat)
              (table.insert bindings val))
            (and (= :number (type k)) (= `&as pat))
            (do
              (assert (= nil (. pattern (+ k 2)))
                      "expected &as argument before last parameter")
              (table.insert bindings (. pattern (+ k 1)))
              (table.insert bindings val))
            ;; don't process the pattern right after &/&as; already got it
            (or (not= :number (type k)) (and (not= `&as (. pattern (- k 1)))
                                             (not= `& (. pattern (- k 1)))))
            (let [subval `(. ,val ,k)
                  (subcondition subbindings) (case-pattern [subval] pat
                                                            unifications
                                                            (without opts :multival?))]
              (table.insert condition subcondition)
              (icollect [_ b (ipairs subbindings) &into bindings] b))))
      (values condition bindings)))
  
  (fn case-guard [vals condition guards unifications case-pattern opts]
    (if (= 0 (length guards))
      (case-pattern vals condition unifications opts)
      (let [(pcondition bindings) (case-pattern vals condition unifications opts)
            condition `(and ,(unpack guards))]
         (values `(and ,pcondition
                       (let ,bindings
                         ,condition)) bindings))))
  
  (fn symbols-in-pattern [pattern]
    "gives the set of symbols inside a pattern"
    (if (list? pattern)
        (let [result {}]
          (each [_ child-pattern (ipairs pattern)]
            (collect [name symbol (pairs (symbols-in-pattern child-pattern)) &into result]
              name symbol))
          result)
        (sym? pattern)
        (if (and (not= pattern `or)
                 (not= pattern `where)
                 (not= pattern `?)
                 (not= pattern `nil))
            {(tostring pattern) pattern}
            {})
        (= (type pattern) :table)
        (let [result {}]
          (each [key-pattern value-pattern (pairs pattern)]
            (collect [name symbol (pairs (symbols-in-pattern key-pattern)) &into result]
              name symbol)
            (collect [name symbol (pairs (symbols-in-pattern value-pattern)) &into result]
              name symbol))
          result)
        {}))
  
  (fn symbols-in-every-pattern [pattern-list infer-unification?]
    "gives a list of symbols that are present in every pattern in the list"
    (let [?symbols (accumulate [?symbols nil
                                _ pattern (ipairs pattern-list)]
                     (let [in-pattern (symbols-in-pattern pattern)]
                       (if ?symbols
                         (do
                           (each [name symbol (pairs ?symbols)]
                             (when (not (. in-pattern name))
                               (tset ?symbols name nil)))
                           ?symbols)
                         in-pattern)))]
      (icollect [_ symbol (pairs (or ?symbols {}))]
        (if (not (and infer-unification?
                      (in-scope? symbol)))
          symbol))))
  
  (fn case-or [vals pattern guards unifications case-pattern opts]
    (let [pattern [(unpack pattern 2)]
          bindings (symbols-in-every-pattern pattern opts.infer-unification?)] ;; TODO opts.infer-unification instead of opts.unification?
      (if (= 0 (length bindings))
        ;; no bindings special case generates simple code
        (let [condition
              (icollect [i subpattern (ipairs pattern) &into `(or)]
                (let [(subcondition subbindings) (case-pattern vals subpattern unifications opts)]
                  subcondition))]
          (values
            (if (= 0 (length guards))
              condition
              `(and ,condition ,(unpack guards)))
            []))
        ;; case with bindings is handled specially, and returns three values instead of two
        (let [matched? (gensym :matched?)
              bindings-mangled (icollect [_ binding (ipairs bindings)]
                                 (gensym (tostring binding)))
              pre-bindings `(if)]
          (each [i subpattern (ipairs pattern)]
            (let [(subcondition subbindings) (case-guard vals subpattern guards {} case-pattern opts)]
              (table.insert pre-bindings subcondition)
              (table.insert pre-bindings `(let ,subbindings
                                            (values true ,(unpack bindings))))))
          (values matched?
                  [`(,(unpack bindings)) `(values ,(unpack bindings-mangled))]
                  [`(,matched? ,(unpack bindings-mangled)) pre-bindings])))))
  
  (fn case-pattern [vals pattern unifications opts top-level?]
    "Take the AST of values and a single pattern and returns a condition
  to determine if it matches as well as a list of bindings to
  introduce for the duration of the body if it does match."
  
    ;; This function returns the following values (multival):
    ;; a "condition", which is an expression that determines whether the
    ;;   pattern should match,
    ;; a "bindings", which bind all of the symbols used in a pattern
    ;; an optional "pre-bindings", which is a list of bindings that happen
    ;;   before the condition and bindings are evaluated. These should only
    ;;   come from a (case-or). In this case there should be no recursion:
    ;;   the call stack should be case-condition > case-pattern > case-or
    ;;
    ;; Here are the expected flags in the opts table:
    ;;   :infer-unification? boolean - if the pattern should guess when to unify  (ie, match -> true, case -> false)
    ;;   :multival? boolean - if the pattern can contain multivals  (in order to disallow patterns like [(1 2)])
    ;;   :in-where? boolean - if the pattern is surrounded by (where)  (where opts into more pattern features)
    ;;   :legacy-guard-allowed? boolean - if the pattern should allow `(a ? b) patterns
  
    ;; we have to assume we're matching against multiple values here until we
    ;; know we're either in a multi-valued clause (in which case we know the #
    ;; of vals) or we're not, in which case we only care about the first one.
    (let [[val] vals]
      (if (and (sym? pattern)
               (or (= pattern `nil)
                   (and opts.infer-unification?
                        (in-scope? pattern)
                        (not= pattern `_))
                   (and opts.infer-unification?
                        (multi-sym? pattern)
                        (in-scope? (. (multi-sym? pattern) 1)))))
          (values `(= ,val ,pattern) [])
          ;; unify a local we've seen already
          (and (sym? pattern) (. unifications (tostring pattern)))
          (values `(= ,(. unifications (tostring pattern)) ,val) [])
          ;; bind a fresh local
          (sym? pattern)
          (let [wildcard? (: (tostring pattern) :find "^_")]
            (if (not wildcard?) (tset unifications (tostring pattern) val))
            (values (if (or wildcard? (string.find (tostring pattern) "^?")) true
                        `(not= ,(sym :nil) ,val)) [pattern val]))
          ;; opt-in unify with (=)
          (and (list? pattern)
               (= (. pattern 1) `=)
               (sym? (. pattern 2)))
          (let [bind (. pattern 2)]
            (assert-compile (= 2 (length pattern)) "(=) should take only one argument" pattern)
            (assert-compile (not opts.infer-unification?) "(=) cannot be used inside of match" pattern)
            (assert-compile opts.in-where? "(=) must be used in (where) patterns" pattern)
            (assert-compile (and (sym? bind) (not= bind `nil) "= has to bind to a symbol" bind))
            (values `(= ,val ,bind) []))
          ;; where-or clause
          (and (list? pattern) (= (. pattern 1) `where) (list? (. pattern 2)) (= (. pattern 2 1) `or))
          (do
            (assert-compile top-level? "can't nest (where) pattern" pattern)
            (case-or vals (. pattern 2) [(unpack pattern 3)] unifications case-pattern (with opts :in-where?)))
          ;; where clause
          (and (list? pattern) (= (. pattern 1) `where))
          (do
            (assert-compile top-level? "can't nest (where) pattern" pattern)
            (case-guard vals (. pattern 2) [(unpack pattern 3)] unifications case-pattern (with opts :in-where?)))
          ;; or clause (not allowed on its own)
          (and (list? pattern) (= (. pattern 1) `or))
          (do
            (assert-compile top-level? "can't nest (or) pattern" pattern)
            ;; This assertion can be removed to make patterns more permissive
            (assert-compile false "(or) must be used in (where) patterns" pattern)
            (case-or vals pattern [] unifications case-pattern opts))
          ;; guard clause
          (and (list? pattern) (= (. pattern 2) `?))
          (do
            (assert-compile opts.legacy-guard-allowed? "legacy guard clause not supported in case" pattern)
            (case-guard vals (. pattern 1) [(unpack pattern 3)] unifications case-pattern opts))
          ;; multi-valued patterns (represented as lists)
          (list? pattern)
          (do
            (assert-compile opts.multival? "can't nest multi-value destructuring" pattern)
            (case-values vals pattern unifications case-pattern opts))
          ;; table patterns
          (= (type pattern) :table)
          (case-table val pattern unifications case-pattern opts)
          ;; literal value
          (values `(= ,val ,pattern) []))))
  
  (fn add-pre-bindings [out pre-bindings]
    "Decide when to switch from the current `if` AST to a new one"
    (if pre-bindings
        ;; `out` no longer needs to grow.
        ;; Instead, a new tail `if` AST is introduced, which is where the rest of
        ;; the clauses will get appended. This way, all future clauses have the
        ;; pre-bindings in scope.
        (let [tail `(if)]
          (table.insert out true)
          (table.insert out `(let ,pre-bindings ,tail))
          tail)
        ;; otherwise, keep growing the current `if` AST.
        out))
  
  (fn case-condition [vals clauses match?]
    "Construct the actual `if` AST for the given match values and clauses."
    ;; root is the original `if` AST.
    ;; out is the `if` AST that is currently being grown.
    (let [root `(if)]
      (faccumulate [out root
                    i 1 (length clauses) 2]
        (let [pattern (. clauses i)
              body (. clauses (+ i 1))
              (condition bindings pre-bindings) (case-pattern vals pattern {}
                                                              {:multival? true
                                                               :infer-unification? match?
                                                               :legacy-guard-allowed? match?}
                                                              true)
              out (add-pre-bindings out pre-bindings)]
          ;; grow the `if` AST by one extra condition
          (table.insert out condition)
          (table.insert out `(let ,bindings
                              ,body))
          out))
      root))
  
  (fn count-case-multival [pattern]
    "Identify the amount of multival values that a pattern requires."
    (if (and (list? pattern) (= (. pattern 2) `?))
        (count-case-multival (. pattern 1))
        (and (list? pattern) (= (. pattern 1) `where))
        (count-case-multival (. pattern 2))
        (and (list? pattern) (= (. pattern 1) `or))
        (accumulate [longest 0
                     _ child-pattern (ipairs pattern)]
          (math.max longest (count-case-multival child-pattern)))
        (list? pattern)
        (length pattern)
        1))
  
  (fn case-val-syms [clauses]
    "What is the length of the largest multi-valued clause? return a list of that
  many gensyms."
    (let [patterns (fcollect [i 1 (length clauses) 2]
                     (. clauses i))
          sym-count (accumulate [longest 0
                                 _ pattern (ipairs patterns)]
                      (math.max longest (count-case-multival pattern)))]
      (fcollect [i 1 sym-count &into (list)]
        (gensym))))
  
  (fn case-impl [match? val ...]
    "The shared implementation of case and match."
    (assert (not= val nil) "missing subject")
    (assert (= 0 (math.fmod (select :# ...) 2))
            "expected even number of pattern/body pairs")
    (assert (not= 0 (select :# ...))
            "expected at least one pattern/body pair")
    (let [clauses [...]
          vals (case-val-syms clauses)]
      ;; protect against multiple evaluation of the value, bind against as
      ;; many values as we ever match against in the clauses.
      (list `let [vals val] (case-condition vals clauses match?))))
  
  (fn case* [val ...]
    "Perform pattern matching on val. See reference for details.
  
  Syntax:
  
  (case data-expression
    pattern body
    (where pattern guards*) body
    (or pattern patterns*) body
    (where (or pattern patterns*) guards*) body
    ;; legacy:
    (pattern ? guards*) body)"
    (case-impl false val ...))
  
  (fn match* [val ...]
    "Perform pattern matching on val, automatically unifying on variables in
  local scope. See reference for details.
  
  Syntax:
  
  (match data-expression
    pattern body
    (where pattern guards*) body
    (or pattern patterns*) body
    (where (or pattern patterns*) guards*) body
    ;; legacy:
    (pattern ? guards*) body)"
    (case-impl true val ...))
  
  (fn case-try-step [how expr else pattern body ...]
    (if (= nil pattern body)
        expr
        ;; unlike regular match, we can't know how many values the value
        ;; might evaluate to, so we have to capture them all in ... via IIFE
        ;; to avoid double-evaluation.
        `((fn [...]
            (,how ...
              ,pattern ,(case-try-step how body else ...)
              ,(unpack else)))
          ,expr)))
  
  (fn case-try-impl [how expr pattern body ...]
    (let [clauses [pattern body ...]
          last (. clauses (length clauses))
          catch (if (= `catch (and (= :table (type last)) (. last 1)))
                   (let [[_ & e] (table.remove clauses)] e) ; remove `catch sym
                   [`_# `...])]
      (assert (= 0 (math.fmod (length clauses) 2))
              "expected every pattern to have a body")
      (assert (= 0 (math.fmod (length catch) 2))
              "expected every catch pattern to have a body")
      (case-try-step how expr catch (unpack clauses))))
  
  (fn case-try* [expr pattern body ...]
    "Perform chained pattern matching for a sequence of steps which might fail.
  
  The values from the initial expression are matched against the first pattern.
  If they match, the first body is evaluated and its values are matched against
  the second pattern, etc.
  
  If there is a (catch pat1 body1 pat2 body2 ...) form at the end, any mismatch
  from the steps will be tried against these patterns in sequence as a fallback
  just like a normal match. If there is no catch, the mismatched values will be
  returned as the value of the entire expression."
    (case-try-impl `case expr pattern body ...))
  
  (fn match-try* [expr pattern body ...]
    "Perform chained pattern matching for a sequence of steps which might fail.
  
  The values from the initial expression are matched against the first pattern.
  If they match, the first body is evaluated and its values are matched against
  the second pattern, etc.
  
  If there is a (catch pat1 body1 pat2 body2 ...) form at the end, any mismatch
  from the steps will be tried against these patterns in sequence as a fallback
  just like a normal match. If there is no catch, the mismatched values will be
  returned as the value of the entire expression."
    (case-try-impl `match expr pattern body ...))
  
  {:case case*
   :case-try case-try*
   :match match*
   :match-try match-try*}
  ]===], {env = env, scope = compiler.scopes.compiler, allowedGlobals = false, useMetadata = true, filename = "src/fennel/match.fnl", moduleName = module_name})
  for k, v in pairs(match_macros) do
    compiler.scopes.global.macros[k] = v
  end
  package.preload[module_name] = nil
end
return mod
