fennel.lua

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 function default_read_chunk(parser_state)
    local function _0_()
      if (0 < parser_state["stack-size"]) then
        return ".."
      else
        return ">> "
      end
    end
    io.write(_0_())
    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 _1_()
      local _0_0 = errtype
      if (_0_0 == "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 (_0_0 == "Runtime") then
        return (compiler.traceback(tostring(err), 4) .. "\n")
      else
        local _ = _0_0
        return ("%s error: %s\n"):format(errtype, tostring(err))
      end
    end
    return io.write(_1_())
  end
  local save_source = table.concat({"local ___i___ = 1", "while true do", " local name, value = debug.getlocal(1, ___i___)", " if(name and name ~= \"___i___\") then", " ___replLocals___[name] = value", " ___i___ = ___i___ + 1", " else break end end"}, "\n")
  local function splice_save_locals(env, lua_source)
    env.___replLocals___ = (env.___replLocals___ or {})
    local spliced_source = {}
    local bind = "local %s = ___replLocals___['%s']"
    for line in lua_source:gmatch("([^\n]+)\n?") do
      table.insert(spliced_source, line)
    end
    for name in pairs(env.___replLocals___) do
      table.insert(spliced_source, 1, bind:format(name, name))
    end
    if ((1 < #spliced_source) and (spliced_source[#spliced_source]):match("^ *return .*$")) then
      table.insert(spliced_source, #spliced_source, save_source)
    end
    return table.concat(spliced_source, "\n")
  end
  local commands = {}
  local function command_3f(input)
    return input:match("^%s*,")
  end
  local function command_docs()
    local _0_
    do
      local tbl_0_ = {}
      for name, f in pairs(commands) do
        tbl_0_[(#tbl_0_ + 1)] = ("  ,%s - %s"):format(name, ((compiler.metadata):get(f, "fnl/docstring") or "undocumented"))
      end
      _0_ = tbl_0_
    end
    return table.concat(_0_, "\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 _0_0, _1_0 = pcall(specials["load-code"]("return require(...)", env), module_name)
    if ((_0_0 == true) and (nil ~= _1_0)) then
      local old = _1_0
      local _ = nil
      package.loaded[module_name] = nil
      _ = nil
      local ok, new = pcall(require, module_name)
      local new0 = nil
      if not ok then
        on_values({new})
        new0 = old
      else
        new0 = new
      end
      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
          end
        end
        package.loaded[module_name] = old
      end
      return on_values({"ok"})
    elseif ((_0_0 == false) and (nil ~= _1_0)) then
      local msg = _1_0
      local function _3_()
        local _2_0 = msg:gsub("\n.*", "")
        return _2_0
      end
      return on_error("Runtime", _3_())
    end
  end
  commands.reload = function(env, read, on_values, on_error)
    local _0_0, _1_0, _2_0 = pcall(read)
    if ((_0_0 == true) and (_1_0 == true) and (nil ~= _2_0)) then
      local module_sym = _2_0
      return reload(tostring(module_sym), env, on_values, on_error)
    elseif ((_0_0 == false) and true and true) then
      local _3fparse_ok = _1_0
      local _3fmsg = _2_0
      return on_error("Parse", (_3fmsg or _3fparse_ok))
    end
  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.")
  local function load_plugin_commands()
    if (utils.root and utils.root.options and utils.root.options.plugins) then
      for _, plugin in ipairs(utils.root.options.plugins) do
        for name, f in pairs(plugin) do
          local _0_0 = name:match("^repl%-command%-(.*)")
          if (nil ~= _0_0) then
            local cmd_name = _0_0
            commands[cmd_name] = (commands[cmd_name] or f)
          end
        end
      end
      return nil
    end
  end
  local function run_command(input, read, loop, env, on_values, on_error)
    load_plugin_commands()
    local command_name = input:match(",([^%s/]+)")
    do
      local _0_0 = commands[command_name]
      if (nil ~= _0_0) then
        local command = _0_0
        command(env, read, on_values, on_error)
      else
        local _ = _0_0
        if ("exit" ~= command_name) then
          on_values({"Unknown command", command_name})
        end
      end
    end
    if ("exit" ~= command_name) then
      return loop()
    end
  end
  local function completer(env, scope, text)
    local matches = {}
    local input_fragment = text:gsub(".*[%s)(]+", "")
    local function add_partials(input, tbl, prefix)
      for k in utils.allpairs(tbl) do
        local k0 = nil
        if ((tbl == env) or (tbl == env.___replLocals___)) then
          k0 = scope.unmanglings[k]
        else
          k0 = k
        end
        if ((#matches < 2000) and (type(k0) == "string") and (input == k0:sub(0, #input))) then
          table.insert(matches, (prefix .. k0))
        end
      end
      return nil
    end
    local function add_matches(input, tbl, prefix)
      local prefix0 = nil
      if prefix then
        prefix0 = (prefix .. ".")
      else
        prefix0 = ""
      end
      if not input:find("%.") then
        return add_partials(input, tbl, prefix0)
      else
        local head, tail = input:match("^([^.]+)%.(.*)")
        local raw_head = nil
        if ((tbl == env) or (tbl == env.___replLocals___)) then
          raw_head = scope.manglings[head]
        else
          raw_head = head
        end
        if (type(tbl[raw_head]) == "table") then
          return add_matches(tail, tbl[raw_head], (prefix0 .. head))
        end
      end
    end
    add_matches(input_fragment, (scope.specials or {}))
    add_matches(input_fragment, (scope.macros or {}))
    add_matches(input_fragment, (env.___replLocals___ or {}))
    add_matches(input_fragment, env)
    add_matches(input_fragment, (env._ENV or env._G or {}))
    return matches
  end
  local function repl(options)
    local old_root_options = utils.root.options
    local env = nil
    if options.env then
      env = specials["wrap-env"](options.env)
    else
      env = setmetatable({}, {__index = (rawget(_G, "_ENV") or _G)})
    end
    local save_locals_3f = ((options.saveLocals ~= false) and env.debug and env.debug.getlocal)
    local opts = {}
    local _ = nil
    for k, v in pairs(options) do
      opts[k] = v
    end
    _ = nil
    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 tostring)
    local byte_stream, clear_stream = parser.granulate(read_chunk)
    local chars = {}
    local read, reset = nil, nil
    local function _1_(parser_state)
      local c = byte_stream(parser_state)
      table.insert(chars, c)
      return c
    end
    read, reset = parser.parser(_1_)
    local scope = compiler["make-scope"]()
    opts.useMetadata = (options.useMetadata ~= false)
    if (opts.allowedGlobals == nil) then
      opts.allowedGlobals = specials["current-global-names"](opts.env)
    end
    if opts.registerCompleter then
      local function _3_(...)
        return completer(env, scope, ...)
      end
      opts.registerCompleter(_3_)
    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
      local ok, parse_ok_3f, x = pcall(read)
      local src_string = string.char((table.unpack or _G.unpack)(chars))
      utils.root.options = opts
      if not ok then
        on_error("Parse", parse_ok_3f)
        clear_stream()
        reset()
        return loop()
      elseif command_3f(src_string) then
        return run_command(src_string, read, loop, env, on_values, on_error)
      else
        if parse_ok_3f then
          do
            local _4_0, _5_0 = pcall(compiler.compile, x, {["assert-compile"] = opts["assert-compile"], ["parse-error"] = opts["parse-error"], correlate = opts.correlate, moduleName = opts.moduleName, scope = scope, source = src_string, useBitLib = opts.useBitLib, useMetadata = opts.useMetadata})
            if ((_4_0 == false) and (nil ~= _5_0)) then
              local msg = _5_0
              clear_stream()
              on_error("Compile", msg)
            elseif ((_4_0 == true) and (nil ~= _5_0)) then
              local src = _5_0
              local src0 = nil
              if save_locals_3f then
                src0 = splice_save_locals(env, src)
              else
                src0 = src
              end
              local _7_0, _8_0 = pcall(specials["load-code"], src0, env)
              if ((_7_0 == false) and (nil ~= _8_0)) then
                local msg = _8_0
                clear_stream()
                on_error("Lua Compile", msg, src0)
              elseif (true and (nil ~= _8_0)) then
                local _0 = _7_0
                local chunk = _8_0
                local function _9_()
                  return print_values(chunk())
                end
                local function _10_(...)
                  return on_error("Runtime", ...)
                end
                xpcall(_9_, _10_)
              end
            end
          end
          utils.root.options = old_root_options
          return loop()
        end
      end
    end
    return loop()
  end
  return repl
end
package.preload["fennel.view"] = package.preload["fennel.view"] or function(...)
  local type_order = {["function"] = 5, boolean = 2, number = 1, string = 3, table = 4, thread = 7, userdata = 6}
  local function sort_keys(_0_0, _1_0)
    local _1_ = _0_0
    local a = _1_[1]
    local _2_ = _1_0
    local b = _2_[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 table_kv_pairs(t)
    local assoc_3f = false
    local i = 1
    local kv = {}
    local insert = table.insert
    for k, v in pairs(t) do
      if ((type(k) ~= "number") or (k ~= i)) then
        assoc_3f = true
      end
      i = (i + 1)
      insert(kv, {k, v})
    end
    table.sort(kv, sort_keys)
    if (#kv == 0) then
      return kv, "empty"
    else
      local function _2_()
        if assoc_3f then
          return "table"
        else
          return "seq"
        end
      end
      return kv, _2_()
    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
    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
    end
    return seen0
  end
  local function detect_cycle(t, seen, _3fk)
    if ("table" == type(t)) then
      seen[t] = true
      local _2_0, _3_0 = next(t, _3fk)
      if ((nil ~= _2_0) and (nil ~= _3_0)) then
        local k = _2_0
        local v = _3_0
        return (seen[k] or detect_cycle(k, seen) or seen[v] or detect_cycle(v, seen) or detect_cycle(t, seen, k))
      end
    end
  end
  local function visible_cycle_3f(t, options)
    return (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(t, indent, id)
    local opener_length = nil
    if id then
      opener_length = (#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)
    local indent_str = ("\n" .. string.rep(" ", indent))
    local open = nil
    local function _2_()
      if ("seq" == table_type) then
        return "["
      else
        return "{"
      end
    end
    open = ((prefix or "") .. _2_())
    local close = nil
    if ("seq" == table_type) then
      close = "]"
    else
      close = "}"
    end
    local oneline = (open .. table.concat(elements, " ") .. close)
    if (not options["one-line?"] and (multiline_3f or ((indent + #oneline) > options["line-length"]))) then
      return (open .. table.concat(elements, indent_str) .. close)
    else
      return oneline
    end
  end
  local function pp_associative(t, kv, options, indent, key_3f)
    local multiline_3f = false
    local id = options.seen[t]
    if (options.level >= options.depth) then
      return "{...}"
    elseif (id and 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(t, indent, id0)
      local slength = nil
      local function _3_()
        local _2_0 = rawget(_G, "utf8")
        if _2_0 then
          return _2_0.len
        else
          return _2_0
        end
      end
      local function _4_(_241)
        return #_241
      end
      slength = ((options["utf8?"] and _3_()) or _4_)
      local prefix = nil
      if visible_cycle_3f0 then
        prefix = ("@" .. id0)
      else
        prefix = ""
      end
      local items = nil
      do
        local tbl_0_ = {}
        for _, _6_0 in pairs(kv) do
          local _7_ = _6_0
          local k = _7_[1]
          local v = _7_[2]
          local _8_
          do
            local k0 = pp(k, options, (indent0 + 1), true)
            local v0 = pp(v, options, (indent0 + slength(k0) + 1))
            multiline_3f = (multiline_3f or k0:find("\n") or v0:find("\n"))
            _8_ = (k0 .. " " .. v0)
          end
          tbl_0_[(#tbl_0_ + 1)] = _8_
        end
        items = tbl_0_
      end
      return concat_table_lines(items, options, multiline_3f, indent0, "table", prefix)
    end
  end
  local function pp_sequence(t, kv, options, indent)
    local multiline_3f = false
    local id = options.seen[t]
    if (options.level >= options.depth) then
      return "[...]"
    elseif (id and 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(t, indent, id0)
      local prefix = nil
      if visible_cycle_3f0 then
        prefix = ("@" .. id0)
      else
        prefix = ""
      end
      local items = nil
      do
        local tbl_0_ = {}
        for _, _3_0 in pairs(kv) do
          local _4_ = _3_0
          local _0 = _4_[1]
          local v = _4_[2]
          local _5_
          do
            local v0 = pp(v, options, indent0)
            multiline_3f = (multiline_3f or v0:find("\n"))
            _5_ = v0
          end
          tbl_0_[(#tbl_0_ + 1)] = _5_
        end
        items = tbl_0_
      end
      return concat_table_lines(items, options, multiline_3f, indent0, "seq", prefix)
    end
  end
  local function concat_lines(lines, options, indent, force_multi_line_3f)
    if (#lines == 0) then
      if options["empty-as-sequence?"] then
        return "[]"
      else
        return "{}"
      end
    else
      local oneline = nil
      local _2_
      do
        local tbl_0_ = {}
        for _, line in ipairs(lines) do
          tbl_0_[(#tbl_0_ + 1)] = line:gsub("^%s+", "")
        end
        _2_ = tbl_0_
      end
      oneline = table.concat(_2_, " ")
      if (not options["one-line?"] and (force_multi_line_3f or oneline:find("\n") or ((indent + #oneline) > options["line-length"]))) 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.level >= options.depth) then
      if options["empty-as-sequence?"] then
        return "[...]"
      else
        return "{...}"
      end
    else
      local _ = nil
      local function _2_(_241)
        return visible_cycle_3f(_241, options)
      end
      options["visible-cycle?"] = _2_
      _ = nil
      local lines, force_multi_line_3f = metamethod(t, pp, options, indent)
      options["visible-cycle?"] = nil
      local _3_0 = type(lines)
      if (_3_0 == "string") then
        return lines
      elseif (_3_0 == "table") then
        return concat_lines(lines, options, indent, force_multi_line_3f)
      else
        local _0 = _3_0
        return error("__fennelview metamethod must return a table of lines")
      end
    end
  end
  local function pp_table(x, options, indent)
    options.level = (options.level + 1)
    local x0 = nil
    do
      local _2_0 = nil
      if options["metamethod?"] then
        local _3_0 = x
        if _3_0 then
          local _4_0 = getmetatable(_3_0)
          if _4_0 then
            _2_0 = _4_0.__fennelview
          else
            _2_0 = _4_0
          end
        else
          _2_0 = _3_0
        end
      else
      _2_0 = nil
      end
      if (nil ~= _2_0) then
        local metamethod = _2_0
        x0 = pp_metamethod(x, metamethod, options, indent)
      else
        local _ = _2_0
        local _4_0, _5_0 = table_kv_pairs(x)
        if (true and (_5_0 == "empty")) then
          local _0 = _4_0
          if options["empty-as-sequence?"] then
            x0 = "[]"
          else
            x0 = "{}"
          end
        elseif ((nil ~= _4_0) and (_5_0 == "table")) then
          local kv = _4_0
          x0 = pp_associative(x, kv, options, indent)
        elseif ((nil ~= _4_0) and (_5_0 == "seq")) then
          local kv = _4_0
          x0 = pp_sequence(x, kv, options, indent)
        else
        x0 = nil
        end
      end
    end
    options.level = (options.level - 1)
    return x0
  end
  local function number__3estring(n)
    local _2_0 = string.gsub(tostring(n), ",", ".")
    return _2_0
  end
  local function colon_string_3f(s)
    return s:find("^[-%w?^_!$%&*+./@|<=>]+$")
  end
  local function pp_string(str, options, indent)
    local escs = nil
    local _2_
    if (options["escape-newlines?"] and (#str < (options["line-length"] - indent))) then
      _2_ = "\\n"
    else
      _2_ = "\n"
    end
    local function _4_(_241, _242)
      return ("\\%03d"):format(_242:byte())
    end
    escs = setmetatable({["\""] = "\\\"", ["\11"] = "\\v", ["\12"] = "\\f", ["\13"] = "\\r", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\\"] = "\\\\", ["\n"] = _2_}, {__index = _4_})
    return ("\"" .. str:gsub("[%c\\\"]", escs) .. "\"")
  end
  local function make_options(t, options)
    local defaults = {["detect-cycles?"] = true, ["empty-as-sequence?"] = false, ["escape-newlines?"] = false, ["line-length"] = 80, ["metamethod?"] = true, ["one-line?"] = false, ["prefer-colon?"] = false, ["utf8?"] = true, depth = 128}
    local overrides = {appearances = count_table_appearances(t, {}), level = 0, 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 _2_(x, options, indent, colon_3f)
    local indent0 = (indent or 0)
    local options0 = (options or make_options(x))
    local tv = type(x)
    local function _4_()
      local _3_0 = getmetatable(x)
      if _3_0 then
        return _3_0.__fennelview
      else
        return _3_0
      end
    end
    if ((tv == "table") or ((tv == "userdata") and _4_())) then
      return pp_table(x, options0, indent0)
    elseif (tv == "number") then
      return number__3estring(x)
    else
      local function _5_()
        if (colon_3f ~= nil) then
          return colon_3f
        elseif ("function" == type(options0["prefer-colon?"])) then
          return options0["prefer-colon?"](x)
        else
          return options0["prefer-colon?"]
        end
      end
      if ((tv == "string") and colon_string_3f(x) and _5_()) then
        return (":" .. x)
      elseif (tv == "string") then
        return pp_string(x, options0, indent0)
      elseif ((tv == "boolean") or (tv == "nil")) then
        return tostring(x)
      else
        return ("#<" .. tostring(x) .. ">")
      end
    end
  end
  pp = _2_
  local function view(x, options)
    return pp(x, make_options(x, options), 0)
  end
  return view
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 _0_(_, key)
      if (type(key) == "string") then
        return env[compiler["global-unmangling"](key)]
      else
        return env[key]
      end
    end
    local function _1_(_, key, value)
      if (type(key) == "string") then
        env[compiler["global-unmangling"](key)] = value
        return nil
      else
        env[key] = value
        return nil
      end
    end
    local function _2_()
      local function putenv(k, v)
        local _3_
        if (type(k) == "string") then
          _3_ = compiler["global-unmangling"](k)
        else
          _3_ = k
        end
        return _3_, v
      end
      return next, utils.kvmap(env, putenv), nil
    end
    return setmetatable({}, {__index = _0_, __newindex = _1_, __pairs = _2_})
  end
  local function current_global_names(env)
    return utils.kvmap((env or _G), compiler["global-unmangling"])
  end
  local function load_code(code, environment, filename)
    local environment0 = (environment or rawget(_G, "_ENV") or _G)
    if (rawget(_G, "setfenv") and rawget(_G, "loadstring")) then
      local f = assert(_G.loadstring(code, filename))
      _G.setfenv(f, environment0)
      return f
    else
      return assert(load(code, filename, "t", environment0))
    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 _0_
        if (#arglist > 0) then
          _0_ = " "
        else
          _0_ = ""
        end
        return string.format("(%s%s%s)\n  %s", name, _0_, 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/body-form?"] = body_form_3f, ["fnl/docstring"] = docstring}
    return nil
  end
  local function compile_do(ast, scope, parent, start)
    local start0 = (start or 2)
    local len = #ast
    local sub_scope = compiler["make-scope"](scope)
    for i = start0, len do
      compiler.compile1(ast[i], sub_scope, parent, {nval = 0})
    end
    return nil
  end
  SPECIALS["do"] = function(ast, scope, parent, opts, start, chunk, sub_scope, pre_syms)
    local start0 = (start or 2)
    local sub_scope0 = (sub_scope or compiler["make-scope"](scope))
    local chunk0 = (chunk or {})
    local len = #ast
    local retexprs = {returned = true}
    local function compile_body(outer_target, outer_tail, outer_retexprs)
      if (len < start0) then
        compiler.compile1(nil, sub_scope0, chunk0, {tail = outer_tail, target = outer_target})
      else
        for i = start0, 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_scope0, chunk0, subopts)
          if (i ~= len) then
            compiler["keep-side-effects"](subexprs, parent, nil, ast[i])
          end
        end
      end
      compiler.emit(parent, chunk0, ast)
      compiler.emit(parent, "end", ast)
      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 = ((pre_syms and pre_syms[i]) or compiler.gensym(scope))
        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 = nil
      if scope.vararg then
        fargs = "..."
      else
        fargs = ""
      end
      compiler.emit(parent, string.format("local function %s(%s)", fname, fargs), ast)
      utils.hook("do", ast, sub_scope0)
      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
      end
    end
    return exprs
  end
  doc_special("values", {"..."}, "Return multiple values from a function. Must be in tail position.")
  local function deep_tostring(x, key_3f)
    local elems = {}
    if utils["sequence?"](x) then
      local _0_
      do
        local tbl_0_ = {}
        for _, v in ipairs(x) do
          tbl_0_[(#tbl_0_ + 1)] = deep_tostring(v)
        end
        _0_ = tbl_0_
      end
      return ("[" .. table.concat(_0_, " ") .. "]")
    elseif utils["table?"](x) then
      local _0_
      do
        local tbl_0_ = {}
        for k, v in pairs(x) do
          tbl_0_[(#tbl_0_ + 1)] = (deep_tostring(k, true) .. " " .. deep_tostring(v))
        end
        _0_ = tbl_0_
      end
      return ("{" .. table.concat(_0_, " ") .. "}")
    elseif (key_3f and (type(x) == "string") and x:find("^[-%w?\\^_!$%&*+./@:|<=>]+$")) then
      return (":" .. x)
    elseif (type(x) == "string") then
      return string.format("%q", x):gsub("\\\"", "\\\\\""):gsub("\"", "\\\"")
    else
      return tostring(x)
    end
  end
  local function set_fn_metadata(arg_list, docstring, parent, fn_name)
    if utils.root.options.useMetadata then
      local args = nil
      local function _0_(_241)
        return ("\"%s\""):format(deep_tostring(_241))
      end
      args = utils.map(arg_list, _0_)
      local meta_fields = {"\"fnl/arglist\"", ("{" .. table.concat(args, ", ") .. "}")}
      if docstring then
        table.insert(meta_fields, "\"fnl/docstring\"")
        table.insert(meta_fields, ("\"" .. docstring:gsub("%s+$", ""):gsub("\\", "\\\\"):gsub("\n", "\\n"):gsub("\"", "\\\"") .. "\""))
      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, ", ")))
    end
  end
  local function get_fn_name(ast, scope, fn_name, multi)
    if (fn_name and (fn_name[1] ~= "nil")) then
      local _0_
      if not multi then
        _0_ = compiler["declare-local"](fn_name, {}, scope, ast)
      else
        _0_ = compiler["symbol-to-expression"](fn_name, scope)[1]
      end
      return _0_, 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, arg_list, docstring)
    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 _0_
    if local_3f then
      _0_ = "local function %s(%s)"
    else
      _0_ = "%s = function(%s)"
    end
    compiler.emit(parent, string.format(_0_, fn_name, table.concat(arg_name_list, ", ")), ast)
    compiler.emit(parent, f_chunk, ast)
    compiler.emit(parent, "end", ast)
    set_fn_metadata(arg_list, docstring, 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, arg_list, docstring, scope)
    local fn_name = compiler.gensym(scope)
    return compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, true, arg_name_list, arg_list, docstring)
  end
  SPECIALS.fn = function(ast, scope, parent)
    local f_scope = nil
    do
      local _0_0 = compiler["make-scope"](scope)
      _0_0["vararg"] = false
      f_scope = _0_0
    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 get_arg_name(arg)
      if 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) and (utils.deref(arg) ~= "nil") and not utils["multi-sym?"](utils.deref(arg))) then
        return compiler["declare-local"](arg, {}, f_scope, ast)
      elseif utils["table?"](arg) then
        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
      else
        return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(arg)), ast[2])
      end
    end
    local arg_name_list = utils.map(arg_list, get_arg_name)
    local index0, docstring = nil, nil
    if ((type(ast[(index + 1)]) == "string") and ((index + 1) < #ast)) then
      index0, docstring = (index + 1), ast[(index + 1)]
    else
      index0, docstring = index, nil
    end
    if fn_name then
      return compile_named_fn(ast, f_scope, f_chunk, parent, index0, fn_name, local_3f, arg_name_list, arg_list, docstring)
    else
      return compile_anonymous_fn(ast, f_scope, f_chunk, parent, index0, arg_name_list, arg_list, docstring, scope)
    end
  end
  doc_special("fn", {"name?", "args", "docstring?", "..."}, "Function syntax. May optionally include a name and docstring.\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)
    if (ast[2] ~= nil) then
      table.insert(parent, {ast = ast, leaf = tostring(ast[2])})
    end
    if (ast[3] ~= nil) then
      return tostring(ast[3])
    end
  end
  SPECIALS.doc = function(ast, scope, parent)
    assert(utils.root.options.useMetadata, "can't look up doc with metadata disabled.")
    compiler.assert((#ast == 2), "expected one argument", ast)
    local target = utils.deref(ast[2])
    local special_or_macro = (scope.specials[target] or scope.macros[target])
    if special_or_macro then
      return ("print(%q)"):format(doc_2a(special_or_macro, target))
    else
      local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
      local value = _0_[1]
      return ("print(require('%s').doc(%s, '%s'))"):format((utils.root.options.moduleName or "fennel"), tostring(value), tostring(ast[2]))
    end
  end
  doc_special("doc", {"x"}, "Print the docstring and arglist for a function, macro, or special form.")
  local function dot(ast, scope, parent)
    compiler.assert((1 < #ast), "expected table argument", ast)
    local len = #ast
    local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
    local lhs = _0_[1]
    if (len == 2) then
      return tostring(lhs)
    else
      local indices = {}
      for i = 3, len do
        local index = ast[i]
        if ((type(index) == "string") and utils["valid-lua-identifier?"](index)) then
          table.insert(indices, ("." .. index))
        else
          local _1_ = compiler.compile1(index, scope, parent, {nval = 1})
          local index0 = _1_[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.")
  SPECIALS.let = function(ast, scope, parent, opts)
    local bindings = ast[2]
    local pre_syms = {}
    compiler.assert((utils["list?"](bindings) or utils["table?"](bindings)), "expected binding table", ast)
    compiler.assert(((#bindings % 2) == 0), "expected even number of name/value bindings", ast[2])
    compiler.assert((#ast >= 3), "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)
  SPECIALS.tset = function(ast, scope, parent)
    compiler.assert((#ast > 3), "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 _0_ = compiler.compile1(ast[i], scope, parent, {nval = 1})
      local key = _0_[1]
      table.insert(keys, tostring(key))
    end
    local value = compiler.compile1(ast[#ast], scope, parent, {nval = 1})[1]
    local rootstr = tostring(root)
    local fmtstr = nil
    if rootstr:match("^{") then
      fmtstr = "do end (%s)[%s] = %s"
    else
      fmtstr = "%s[%s] = %s"
    end
    return compiler.emit(parent, fmtstr:format(tostring(root), 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)
        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)
    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
    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 has_else_3f = ((#ast > 3) and ((#ast % 2) == 0))
    local else_branch = (has_else_3f and 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 = nil
      if not branch.nested then
        fstr = "if %s then"
      else
        fstr = "elseif %s then"
      end
      local cond = tostring(branch.cond)
      local cond_line = nil
      if ((cond == "true") and branch.nested and (i == #branches) and not has_else_3f) then
        cond_line = "else"
      else
        cond_line = fstr:format(cond)
      end
      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
        if has_else_3f then
          compiler.emit(last_buffer, "else", ast)
          compiler.emit(last_buffer, else_branch.chunk, ast)
        elseif (inner_target and (cond_line ~= "else")) then
          compiler.emit(last_buffer, "else", ast)
          compiler.emit(last_buffer, ("%s = nil"):format(inner_target), ast)
        end
        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
      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)
    if ("until" == bindings[(#bindings - 1)]) then
      table.remove(bindings, (#bindings - 1))
      return table.remove(bindings)
    end
  end
  local function compile_until(condition, scope, chunk)
    if condition then
      local _0_ = compiler.compile1(condition, scope, chunk, {nval = 1})
      local condition_lua = _0_[1]
      return compiler.emit(chunk, ("if %s then break end"):format(tostring(condition_lua)), condition)
    end
  end
  SPECIALS.each = function(ast, scope, parent)
    compiler.assert((#ast >= 3), "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)
      if utils["sym?"](v) then
        return compiler["declare-local"](v, {}, sub_scope, ast, new_manglings)
      else
        local raw = utils.sym(compiler.gensym(sub_scope))
        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, sub_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])
        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((#ast >= 3), "expected body expression", ast[1])
    for i = 1, math.min(#ranges, 3) do
      range_args[i] = tostring(compiler.compile1(ranges[i], sub_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 _0_ = ast
    local _ = _0_[1]
    local _0 = _0_[2]
    local method_string = _0_[3]
    local call_string = nil
    if ((target.type == "literal") 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 _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
    local target = _0_[1]
    local args = {}
    for i = 4, #ast do
      local subexprs = nil
      local _1_
      if (i ~= #ast) then
        _1_ = 1
      else
      _1_ = nil
      end
      subexprs = compiler.compile1(ast[i], scope, parent, {nval = _1_})
      utils.map(subexprs, tostring, args)
    end
    if ((type(ast[3]) == "string") 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
      local function _1_()
        local _0_0 = tostring(ast[i]):gsub("\n", " ")
        return _0_0
      end
      table.insert(els, _1_())
    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 = nil
    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 = nil
    do
      local _0_0 = compiler["make-scope"](scope)
      _0_0["vararg"] = false
      _0_0["hashfn"] = true
      f_scope = _0_0
    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(("$" .. i)), {}, f_scope, ast)
    end
    local function walker(idx, node, parent_node)
      if (utils["sym?"](node) and (utils.deref(node) == "$...")) then
        parent_node[idx] = utils.varg()
        f_scope.vararg = true
        return nil
      else
        return (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)
    end
    local arg_str = nil
    if f_scope.vararg then
      arg_str = utils.deref(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 arithmetic_special(name, zero_arity, unary_prefix, ast, scope, parent)
    local len = #ast
    if (len == 1) then
      compiler.assert(zero_arity, "Expected more than 0 arguments", ast)
      return utils.expr(zero_arity, "literal")
    else
      local operands = {}
      local padded_op = (" " .. name .. " ")
      for i = 2, len do
        local subexprs = nil
        local _0_
        if (i ~= len) then
          _0_ = 1
        else
        _0_ = nil
        end
        subexprs = compiler.compile1(ast[i], scope, parent, {nval = _0_})
        utils.map(subexprs, tostring, operands)
      end
      if (#operands == 1) then
        if unary_prefix then
          return ("(" .. unary_prefix .. padded_op .. operands[1] .. ")")
        else
          return operands[1]
        end
      else
        return ("(" .. table.concat(operands, padded_op) .. ")")
      end
    end
  end
  local function define_arithmetic_special(name, zero_arity, unary_prefix, lua_name)
    local function _0_(...)
      return arithmetic_special((lua_name or name), zero_arity, unary_prefix, ...)
    end
    SPECIALS[name] = _0_
    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")
  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 = nil
        local _0_
        if (i ~= len) then
          _0_ = 1
        else
        _0_ = nil
        end
        subexprs = compiler.compile1(ast[i], scope, parent, {nval = _0_})
        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 function _0_(...)
      return bitop_special(native, name, zero_arity, unary_prefix, ...)
    end
    SPECIALS[name] = _0_
    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.")
  define_arithmetic_special("or", "false")
  define_arithmetic_special("and", "true")
  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.")
  doc_special("..", {"a", "b", "..."}, "String concatenation operator; works the same as Lua but accepts more arguments.")
  local function native_comparator(op, _0_0, scope, parent)
    local _1_ = _0_0
    local _ = _1_[1]
    local lhs_ast = _1_[2]
    local rhs_ast = _1_[3]
    local _2_ = compiler.compile1(lhs_ast, scope, parent, {nval = 1})
    local lhs = _2_[1]
    local _3_ = compiler.compile1(rhs_ast, scope, parent, {nval = 1})
    local rhs = _3_[1]
    return string.format("(%s %s %s)", tostring(lhs), op, tostring(rhs))
  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
    for i = 1, (#arglist - 1) do
      table.insert(comparisons, string.format("(%s %s %s)", arglist[i], op, arglist[(i + 1)]))
    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, lua_op, chain_op)
    do
      local op = (lua_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)
        else
          return double_eval_protected_comparator(op, chain_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, realop)
    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 ((realop 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.")
  SPECIALS["~="] = SPECIALS["not="]
  SPECIALS["#"] = SPECIALS.length
  SPECIALS.quote = function(ast, scope, parent)
    compiler.assert((#ast == 2), "expected one argument")
    local runtime, this_scope = true, scope
    while this_scope do
      this_scope = this_scope.parent
      if (this_scope == compiler.scopes.compiler) then
        runtime = false
      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 already_warned_3f = {}
  local compile_env_warning = table.concat({"WARNING: Attempting to %s %s in compile scope.", "In future versions of Fennel this will not be allowed without the", "--no-compiler-sandbox flag or passing a :compilerEnv globals table", "in the options.\n"}, "\n")
  local function compiler_env_warn(_, key)
    local v = _G[key]
    if (v and io and io.stderr and not already_warned_3f[key]) then
      already_warned_3f[key] = true
      do end (io.stderr):write(compile_env_warning:format("use global", key))
    end
    return v
  end
  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(strict_3f)
    local _1_
    if strict_3f then
      _1_ = nil
    else
      _1_ = compiler_env_warn
    end
    return setmetatable({assert = assert, bit = rawget(_G, "bit"), error = error, getmetatable = safe_getmetatable, ipairs = ipairs, math = utils.copy(math), next = next, pairs = pairs, pcall = pcall, print = print, rawequal = rawequal, rawget = rawget, rawlen = rawget(_G, "rawlen"), rawset = rawset, require = safe_require, select = select, setmetatable = setmetatable, string = utils.copy(string), table = utils.copy(table), tonumber = tonumber, tostring = tostring, type = type, xpcall = xpcall}, {__index = _1_})
  end
  local function make_compiler_env(ast, scope, parent, strict_3f)
    local function _1_()
      return compiler.scopes.macro
    end
    local function _2_(symbol)
      compiler.assert(compiler.scopes.macro, "must call from macro", ast)
      return compiler.scopes.macro.manglings[tostring(symbol)]
    end
    local function _3_(base)
      return utils.sym(compiler.gensym((compiler.scopes.macro or scope), base))
    end
    local function _4_(form)
      compiler.assert(compiler.scopes.macro, "must call from macro", ast)
      return compiler.macroexpand(form, compiler.scopes.macro)
    end
    local _6_
    do
      local _5_0 = utils.root.options
      if ((type(_5_0) == "table") and (_5_0["compiler-env"] == "strict")) then
        _6_ = safe_compiler_env(true)
      elseif ((type(_5_0) == "table") and (nil ~= _5_0.compilerEnv)) then
        local compilerEnv = _5_0.compilerEnv
        _6_ = compilerEnv
      elseif ((type(_5_0) == "table") and (nil ~= _5_0["compiler-env"])) then
        local compiler_env = _5_0["compiler-env"]
        _6_ = compiler_env
      else
        local _ = _5_0
        _6_ = safe_compiler_env(false)
      end
    end
    return setmetatable({["assert-compile"] = compiler.assert, ["get-scope"] = _1_, ["in-scope?"] = _2_, ["list?"] = utils["list?"], ["multi-sym?"] = utils["multi-sym?"], ["sequence?"] = utils["sequence?"], ["sym?"] = utils["sym?"], ["table?"] = utils["table?"], ["varg?"] = utils["varg?"], _AST = ast, _CHUNK = parent, _IS_COMPILER = true, _SCOPE = scope, _SPECIALS = compiler.scopes.global.specials, _VARARG = utils.varg(), gensym = _3_, list = utils.list, macroexpand = _4_, sequence = utils.sequence, sym = utils.sym, unpack = unpack, view = view}, {__index = _6_})
  end
  local cfg = string.gmatch(package.config, "([^\n]+)")
  local dirsep, pathsep, pathmark = (cfg() or "/"), (cfg() or ";"), (cfg() or "?")
  local pkg_config = {dirsep = dirsep, pathmark = pathmark, pathsep = pathsep}
  local function escapepat(str)
    return string.gsub(str, "[^%w]", "%%%1")
  end
  local function search_module(modulename, pathstring)
    local pathsepesc = escapepat(pkg_config.pathsep)
    local pattern = ("([^%s]*)%s"):format(pathsepesc, pathsepesc)
    local no_dot_module = modulename:gsub("%.", pkg_config.dirsep)
    local fullpath = ((pathstring 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 _1_0 = (io.open(filename) or io.open(filename2))
      if (nil ~= _1_0) then
        local file = _1_0
        file:close()
        return filename
      end
    end
    local function find_in_path(start)
      local _1_0 = fullpath:match(pattern, start)
      if (nil ~= _1_0) then
        local path = _1_0
        return (try_path(path) or find_in_path((start + #path + 1)))
      end
    end
    return find_in_path(1)
  end
  local function make_searcher(options)
    local function _1_(module_name)
      local opts = utils.copy(utils.root.options)
      for k, v in pairs((options or {})) do
        opts[k] = v
      end
      opts["module-name"] = module_name
      local _2_0 = search_module(module_name)
      if (nil ~= _2_0) then
        local filename = _2_0
        local function _3_(...)
          return utils["fennel-module"].dofile(filename, opts, ...)
        end
        return _3_, filename
      end
    end
    return _1_
  end
  local function macro_globals(env, globals)
    local allowed = current_global_names(env)
    for _, k in pairs((globals or {})) do
      table.insert(allowed, k)
    end
    return allowed
  end
  local function default_macro_searcher(module_name)
    local _1_0 = search_module(module_name)
    if (nil ~= _1_0) then
      local filename = _1_0
      local function _2_(...)
        return utils["fennel-module"].dofile(filename, {env = "_COMPILER"}, ...)
      end
      return _2_, filename
    end
  end
  local macro_searchers = {default_macro_searcher}
  local function search_macro_module(modname, n)
    local _1_0 = macro_searchers[n]
    if (nil ~= _1_0) then
      local f = _1_0
      local _2_0, _3_0 = f(modname)
      if ((nil ~= _2_0) and true) then
        local loader = _2_0
        local _3ffilename = _3_0
        return loader, _3ffilename
      else
        local _ = _2_0
        return search_macro_module(modname, (n + 1))
      end
    end
  end
  local macro_loaded = {}
  local function metadata_only_fennel(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}
    end
  end
  local function _1_(modname)
    local function _2_()
      local loader, filename = search_macro_module(modname, 1)
      compiler.assert(loader, (modname .. " module not found."))
      macro_loaded[modname] = loader(modname, filename)
      return macro_loaded[modname]
    end
    return (macro_loaded[modname] or metadata_only_fennel(modname) or _2_())
  end
  safe_require = _1_
  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)
      scope.macros[k] = v
    end
    return nil
  end
  SPECIALS["require-macros"] = function(ast, scope, parent, real_ast)
    compiler.assert((#ast == 2), "Expected one module name argument", (real_ast or ast))
    local filename = (ast[2].filename or ast.filename)
    local modname_chunk = load_code(compiler.compile(ast[2]), nil, filename)
    local modname = modname_chunk(utils.root.options["module-name"], filename)
    compiler.assert((type(modname) == "string"), "module name must compile to string", (real_ast or ast))
    if not macro_loaded[modname] then
      local env = make_compiler_env(ast, scope, parent)
      local loader, filename0 = search_macro_module(modname, 1)
      compiler.assert(loader, (modname .. " module not found."), ast)
      macro_loaded[modname] = loader(modname, filename0)
    end
    return add_macros(macro_loaded[modname], ast, scope, parent)
  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"]
    end
    for _, val in parser.parser(parser["string-stream"](src), path) do
      table.insert(forms, val)
    end
    for i = 1, #forms do
      local subopts = nil
      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 = nil
    do
      local f = assert(io.open(path))
      local function close_handlers_0_(ok_0_, ...)
        f:close()
        if ok_0_ then
          return ...
        else
          return error(..., 0)
        end
      end
      local function _2_()
        return f:read("*all"):gsub("[\13\n]*$", "")
      end
      src = close_handlers_0_(xpcall(_2_, (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 i, v in ipairs(temp_chunk) do
      table.insert(utils.root.chunk, i, 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)
    end
  end
  SPECIALS.include = function(ast, scope, parent, opts)
    compiler.assert((#ast == 2), "expected one argument", ast)
    local modexpr = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
    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 function _3_()
        local _2_0 = search_module(mod)
        if (nil ~= _2_0) then
          local fennel_path = _2_0
          return include_path(ast, opts, fennel_path, mod, true)
        else
          local _ = _2_0
          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
        end
      end
      return (include_circular_fallback(mod, modexpr, opts.fallback, ast) or utils.root.scope.includes[mod] or _3_())
    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 = macro_globals(env, current_global_names())
    return 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), "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)
    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 {["current-global-names"] = current_global_names, ["load-code"] = load_code, ["macro-loaded"] = macro_loaded, ["macro-searchers"] = macro_searchers, ["make-compiler-env"] = make_compiler_env, ["make-searcher"] = make_searcher, ["search-module"] = search_module, ["wrap-env"] = wrap_env, doc = doc_2a}
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(parent)
    local parent0 = (parent or scopes.global)
    local _0_
    if parent0 then
      _0_ = ((parent0.depth or 0) + 1)
    else
      _0_ = 0
    end
    return {autogensyms = setmetatable({}, {__index = (parent0 and parent0.autogensyms)}), depth = _0_, gensyms = setmetatable({}, {__index = (parent0 and parent0.gensyms)}), hashfn = (parent0 and parent0.hashfn), includes = setmetatable({}, {__index = (parent0 and parent0.includes)}), macros = setmetatable({}, {__index = (parent0 and parent0.macros)}), manglings = setmetatable({}, {__index = (parent0 and parent0.manglings)}), parent = parent0, refedglobals = setmetatable({}, {__index = (parent0 and parent0.refedglobals)}), specials = setmetatable({}, {__index = (parent0 and parent0.specials)}), symmeta = setmetatable({}, {__index = (parent0 and parent0.symmeta)}), unmanglings = setmetatable({}, {__index = (parent0 and parent0.unmanglings)}), vararg = (parent0 and parent0.vararg)}
  end
  local function assert_msg(ast, msg)
    local ast_tbl = nil
    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 target = nil
    local function _1_()
      if utils["sym?"](ast_tbl[1]) then
        return utils.deref(ast_tbl[1])
      else
        return (ast_tbl[1] or "()")
      end
    end
    target = tostring(_1_())
    return string.format("Compile error in '%s' %s:%s: %s", target, filename, line, msg)
  end
  local function assert_compile(condition, msg, ast)
    if not condition then
      local _0_ = (utils.root.options or {})
      local source = _0_["source"]
      local unfriendly = _0_["unfriendly"]
      utils.root.reset()
      if unfriendly then
        error(assert_msg(ast, msg), 0)
      else
        friend["assert-compile"](condition, msg, ast, source)
      end
    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 = {["\11"] = "\\v", ["\12"] = "\\f", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\n"] = "n"}
  local function serialize_string(str)
    local function _0_(_241)
      return ("\\" .. _241:byte())
    end
    return string.gsub(string.gsub(string.format("%q", str), ".", serialize_subst), "[\128-\255]", _0_)
  end
  local function global_mangling(str)
    if utils["valid-lua-identifier?"](str) then
      return str
    else
      local function _0_(_241)
        return string.format("_%02x", _241:byte())
      end
      return ("__fnl_global__" .. str:gsub("[^%w]", _0_))
    end
  end
  local function global_unmangling(identifier)
    local _0_0 = string.match(identifier, "^__fnl_global__(.*)$")
    if (nil ~= _0_0) then
      local rest = _0_0
      local _1_0 = nil
      local function _2_(_241)
        return string.char(tonumber(_241:sub(2), 16))
      end
      _1_0 = string.gsub(rest, "_[%da-f][%da-f]", _2_)
      return _1_0
    else
      local _ = _0_0
      return identifier
    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, temp_manglings)
    assert_compile(not utils["multi-sym?"](str), ("unexpected multi symbol " .. str), ast)
    local raw = nil
    if (utils["lua-keywords"][str] or str:match("^%d")) then
      raw = ("_" .. str)
    else
      raw = str
    end
    local mangling = nil
    local function _1_(_241)
      return string.format("_%02x", _241:byte())
    end
    mangling = string.gsub(string.gsub(raw, "-", "_"), "[^%w_]", _1_)
    local unique = unique_mangling(mangling, mangling, scope, 0)
    scope.unmanglings[unique] = str
    do
      local manglings = (temp_manglings or scope.manglings)
      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)
      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 gensym(scope, base)
    local append, mangling = 0, ((base or "") .. "_0_")
    while scope.unmanglings[mangling] do
      mangling = ((base or "") .. "_" .. append .. "_")
      append = (append + 1)
    end
    scope.unmanglings[mangling] = (base or true)
    scope.gensyms[mangling] = true
    return mangling
  end
  local function autogensym(base, scope)
    local _0_0 = utils["multi-sym?"](base)
    if (nil ~= _0_0) then
      local parts = _0_0
      parts[1] = autogensym(parts[1], scope)
      return table.concat(parts, ((parts["multi-sym-method-call"] and ":") or "."))
    else
      local _ = _0_0
      local function _1_()
        local mangling = gensym(scope, base:sub(1, ( - 2)))
        scope.autogensyms[base] = mangling
        return mangling
      end
      return (scope.autogensyms[base] or _1_())
    end
  end
  local already_warned = {}
  local function check_binding_valid(symbol, scope, ast)
    local name = utils.deref(symbol)
    if (io and io.stderr and name:find("&") and not already_warned[symbol]) then
      already_warned[symbol] = true
      do end (io.stderr):write(("-- Warning: & will not be allowed in identifier names in " .. "future versions: " .. (symbol.filename or "unknown") .. ":" .. (symbol.line or "?") .. "\n"))
    end
    assert_compile(not (scope.specials[name] or 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, temp_manglings)
    check_binding_valid(symbol, scope, ast)
    local name = utils.deref(symbol)
    assert_compile(not utils["multi-sym?"](name), ("unexpected multi symbol " .. name), ast)
    scope.symmeta[name] = meta
    return local_mangling(name, scope, ast, temp_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"
      end
      return table.concat(multi_sym_parts, ".")
    end
  end
  local function symbol_to_expression(symbol, scope, reference_3f)
    utils.hook("symbol-to-expression", symbol, scope, reference_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 = (((#parts > 1) 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
    end
    assert_compile((not reference_3f or local_3f or ("_ENV" == parts[1]) or global_allowed_3f(parts[1])), ("unknown global in strict mode: " .. tostring(parts[1])), symbol)
    if (allowed_globals and not local_3f) then
      utils.root.scope.refedglobals[parts[1]] = true
    end
    return utils.expr(combine_parts(parts, scope), etype)
  end
  local function emit(chunk, out, ast)
    if (type(out) == "table") then
      return table.insert(chunk, out)
    else
      return table.insert(chunk, {ast = ast, leaf = out})
    end
  end
  local function peephole(chunk)
    if chunk.leaf then
      return chunk
    elseif ((#chunk >= 3) 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 ast_source(ast)
    local m = getmetatable(ast)
    return ((m and m.line and m) or (("table" == type(ast)) and ast) or {})
  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 (#subchunk > 0)) then
            local source = ast_source(subchunk.ast)
            if (file == source.filename) then
              last_line0 = math.max(last_line0, (source.line or 0))
            end
            last_line0 = flatten(subchunk, out, last_line0, file)
          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] = ""
      end
    end
    return table.concat(out, "\n")
  end
  local function flatten_chunk(sm, chunk, tab, depth)
    if chunk.leaf then
      local code = chunk.leaf
      local info = chunk.ast
      if sm then
        table.insert(sm, {(info and info.filename), (info and info.line)})
      end
      return code
    else
      local tab0 = nil
      do
        local _0_0 = tab
        if (_0_0 == true) then
          tab0 = "  "
        elseif (_0_0 == false) then
          tab0 = ""
        elseif (_0_0 == tab) then
          tab0 = tab
        elseif (_0_0 == nil) then
          tab0 = ""
        else
        tab0 = nil
        end
      end
      local function parter(c)
        if (c.leaf or (#c > 0)) then
          local sub = flatten_chunk(sm, c, tab0, (depth + 1))
          if (depth > 0) then
            return (tab0 .. sub:gsub("\n", ("\n" .. tab0)))
          else
            return sub
          end
        end
      end
      return table.concat(utils.map(chunk, parter), "\n")
    end
  end
  local fennel_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 sm = {}
      local ret = flatten_chunk(sm, chunk0, options.indent, 0)
      if sm then
        sm.short_src = (options.filename or make_short_src((options.source or ret)))
        if options.filename then
          sm.key = ("@" .. options.filename)
        else
          sm.key = ret
        end
        fennel_sourcemap[sm.key] = sm
      end
      return ret, sm
    end
  end
  local function make_metadata()
    local function _0_(self, tgt, key)
      if self[tgt] then
        return self[tgt][key]
      end
    end
    local function _1_(self, tgt, key, value)
      self[tgt] = (self[tgt] or {})
      self[tgt][key] = value
      return tgt
    end
    local function _2_(self, tgt, ...)
      local kv_len = select("#", ...)
      local kvs = {...}
      if ((kv_len % 2) ~= 0) then
        error("metadata:setall() expected even number of k/v pairs")
      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 = _0_, set = _1_, setall = _2_}, __mode = "k"})
  end
  local function exprs1(exprs)
    return table.concat(utils.map(exprs, 1), ", ")
  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 = nil
        if (code:byte() == 40) then
          disambiguated = ("do end " .. code)
        else
          disambiguated = code
        end
        emit(chunk, disambiguated, ast)
      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 (len > n) 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
      end
    end
    if opts.tail then
      emit(parent, string.format("return %s", exprs1(exprs)), ast)
    end
    if opts.target then
      local result = exprs1(exprs)
      local function _2_()
        if (result == "") then
          return "nil"
        else
          return result
        end
      end
      emit(parent, string.format("%s = %s", opts.target, _2_()), ast)
    end
    if (opts.tail or opts.target) then
      return {returned = true}
    else
      local _3_0 = exprs
      _3_0["returned"] = true
      return _3_0
    end
  end
  local function find_macro(ast, scope, multi_sym_parts)
    local function find_in_table(t, i)
      if (i <= #multi_sym_parts) then
        return find_in_table((utils["table?"](t) and t[multi_sym_parts[i]]), (i + 1))
      else
        return t
      end
    end
    local macro_2a = (utils["sym?"](ast[1]) and scope.macros[utils.deref(ast[1])])
    if (not macro_2a and multi_sym_parts) then
      local nested_macro = find_in_table(scope.macros, 1)
      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 macroexpand_2a(ast, scope, once)
    local _0_0 = nil
    if utils["list?"](ast) then
      _0_0 = find_macro(ast, scope, utils["multi-sym?"](ast[1]))
    else
    _0_0 = nil
    end
    if (_0_0 == false) then
      return ast
    elseif (nil ~= _0_0) then
      local macro_2a = _0_0
      local old_scope = scopes.macro
      local _ = nil
      scopes.macro = scope
      _ = nil
      local ok, transformed = nil, nil
      local function _2_()
        return macro_2a(unpack(ast, 2))
      end
      ok, transformed = xpcall(_2_, debug.traceback)
      scopes.macro = old_scope
      assert_compile(ok, transformed, ast)
      if (once or not transformed) then
        return transformed
      else
        return macroexpand_2a(transformed, scope)
      end
    else
      local _ = _0_0
      return ast
    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 = nil
    if (type(exprs) == "string") then
      exprs0 = utils.expr(exprs, "expression")
    else
      exprs0 = exprs
    end
    local exprs2 = nil
    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((("string" == type(ast[1])) or (fcallee.type ~= "literal")), ("cannot call literal value " .. tostring(ast[1])), ast)
    for i = 2, len do
      local subexprs = nil
      local _0_
      if (i ~= len) then
        _0_ = 1
      else
      _0_ = nil
      end
      subexprs = compile1(ast[i], scope, parent, {nval = _0_})
      table.insert(fargs, (subexprs[1] or utils.expr("nil", "literal")))
      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 = nil
    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[utils.deref(first)])
    assert_compile((len > 0), "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(":", nil, scope), utils.sym(table_with_method, nil, scope), 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)
    assert_compile(scope.vararg, "unexpected vararg", 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 = nil
    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 _0_0 = string.gsub(tostring(n), ",", ".")
    return _0_0
  end
  local function compile_scalar(ast, _scope, parent, opts)
    local serialize = nil
    do
      local _0_0 = type(ast)
      if (_0_0 == "nil") then
        serialize = tostring
      elseif (_0_0 == "boolean") then
        serialize = tostring
      elseif (_0_0 == "string") then
        serialize = serialize_string
      elseif (_0_0 == "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 buffer = {}
    for i = 1, #ast do
      local nval = ((i ~= #ast) and 1)
      table.insert(buffer, exprs1(compile1(ast[i], scope, parent, {nval = nval})))
    end
    local function write_other_values(k)
      if ((type(k) ~= "number") or (math.floor(k) ~= k) or (k < 1) or (k > #ast)) then
        if ((type(k) == "string") and utils["valid-lua-identifier?"](k)) then
          return {k, k}
        else
          local _0_ = compile1(k, scope, parent, {nval = 1})
          local compiled = _0_[1]
          local kstr = ("[" .. tostring(compiled) .. "]")
          return {kstr, k}
        end
      end
    end
    do
      local keys = nil
      do
        local _0_0 = utils.kvmap(ast, write_other_values)
        local function _1_(a, b)
          return (a[1] < b[1])
        end
        table.sort(_0_0, _1_)
        keys = _0_0
      end
      local function _1_(_2_0)
        local _3_ = _2_0
        local k1 = _3_[1]
        local k2 = _3_[2]
        local _4_ = compile1(ast[k2], scope, parent, {nval = 1})
        local v = _4_[1]
        return string.format("%s = %s", k1, tostring(v))
      end
      utils.map(keys, _1_, buffer)
    end
    return handle_compile_opts({utils.expr(("{" .. table.concat(buffer, ", ") .. "}"), "expression")}, parent, opts, ast)
  end
  local function compile1(ast, scope, parent, opts)
    local opts0 = (opts or {})
    local ast0 = macroexpand_2a(ast, scope)
    if utils["list?"](ast0) then
      return compile_call(ast0, scope, parent, opts0, compile1)
    elseif utils["varg?"](ast0) then
      return compile_varg(ast0, scope, parent, opts0)
    elseif utils["sym?"](ast0) then
      return compile_sym(ast0, scope, parent, opts0)
    elseif (type(ast0) == "table") then
      return compile_table(ast0, scope, parent, opts0, compile1)
    elseif ((type(ast0) == "nil") or (type(ast0) == "boolean") or (type(ast0) == "number") or (type(ast0) == "string")) then
      return compile_scalar(ast0, scope, parent, opts0)
    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 _0_ = opts0
    local declaration = _0_["declaration"]
    local forceglobal = _0_["forceglobal"]
    local forceset = _0_["forceset"]
    local isvar = _0_["isvar"]
    local symtype = _0_["symtype"]
    local symtype0 = ("_" .. (symtype or "dst"))
    local setter = nil
    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]]
        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)
          assert_compile((meta or not opts0.noundef), ("expected local " .. parts[1]), symbol)
        end
        if forceglobal then
          assert_compile(not scope.symmeta[scope.unmanglings[raw]], ("global " .. raw .. " conflicts with local"), symbol)
          scope.manglings[raw] = global_mangling(raw)
          scope.unmanglings[global_mangling(raw)] = raw
          if allowed_globals then
            table.insert(allowed_globals, raw)
          end
        end
        return symbol_to_expression(symbol, scope)[1]
      end
    end
    local function compile_top_target(lvalues)
      local inits = nil
      local function _2_(_241)
        if scope.manglings[_241] then
          return _241
        else
          return "nil"
        end
      end
      inits = utils.map(lvalues, _2_)
      local init = table.concat(inits, ", ")
      local lvalue = table.concat(lvalues, ", ")
      local plen, plast = #parent, parent[#parent]
      local ret = compile1(from, scope, parent, {target = lvalue})
      if declaration then
        for pi = plen, #parent do
          if (parent[pi] == plast) then
            plen = pi
          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
      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[utils.deref(left)] = {var = isvar}
        return nil
      end
    end
    local function destructure_table(left, rightexprs, top_3f, destructure1)
      local s = gensym(scope, symtype0)
      local right = nil
      do
        local _2_0 = nil
        if top_3f then
          _2_0 = exprs1(compile1(from, scope, parent))
        else
          _2_0 = exprs1(rightexprs)
        end
        if (_2_0 == "") then
          right = "nil"
        elseif (nil ~= _2_0) then
          local right0 = _2_0
          right = right0
        else
        right = nil
        end
      end
      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?"](v) and (utils.deref(v) == "&")) then
            local unpack_str = "{(table.unpack or unpack)(%s, %s)}"
            local formatted = string.format(unpack_str, 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)
            destructure1(left[(k + 1)], {subexpr}, left)
          elseif (utils["sym?"](k) and (utils.deref(k) == "&as")) then
            destructure_sym(v, {utils.expr(tostring(s))}, left)
          elseif (utils["sequence?"](left) and (utils.deref(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 = nil
            if (type(k) == "string") then
              key = serialize_string(k)
            else
              key = k
            end
            local subexpr = utils.expr(string.format("%s[%s]", s, key), "expression")
            destructure1(v, {subexpr}, left)
          end
        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)
          tables[i] = {name, utils.expr(symname, "sym")}
        end
      end
      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
          scope.symmeta[utils.deref(sym)] = {var = isvar}
        end
      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}
      end
    end
    local ret = destructure1(to, nil, ast, true)
    utils.hook("destructure", from, to, scope)
    apply_manglings(scope, new_manglings, ast)
    return ret
  end
  local function require_include(ast, scope, parent, opts)
    opts.fallback = function(e)
      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 = {}
    local _0_ = utils.root
    _0_["set-reset"](_0_)
    allowed_globals = opts.allowedGlobals
    if (opts.indent == nil) then
      opts.indent = "  "
    end
    if opts.requireAsInclude then
      scope.specials.require = require_include
    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])
    end
    allowed_globals = old_globals
    utils.root.reset()
    return flatten(chunk, opts)
  end
  local function compile_string(str, opts)
    return compile_stream(parser["string-stream"](str), (opts or {}))
  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))
    local _0_ = utils.root
    _0_["set-reset"](_0_)
    allowed_globals = opts0.allowedGlobals
    if (opts0.indent == nil) then
      opts0.indent = "  "
    end
    if opts0.requireAsInclude then
      scope.specials.require = require_include
    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)
    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 = fennel_sourcemap[info.source]
      if (remap and remap[info.currentline]) then
        if remap[info.currentline][1] then
          info.short_src = fennel_sourcemap[("@" .. remap[info.currentline][1])].short_src
        else
          info.short_src = remap.short_src
        end
        info.currentline = (remap[info.currentline][2] or -1)
      end
      if (info.what == "Lua") then
        local function _1_()
          if info.name then
            return ("'" .. info.name .. "'")
          else
            return "?"
          end
        end
        return string.format("  %s:%d: in function %s", info.short_src, info.currentline, _1_())
      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(msg, start)
    local msg0 = tostring((msg or ""))
    if ((msg0:find("^Compile error") or msg0:find("^Parse error")) and not utils["debug-on?"]("trace")) then
      return msg0
    else
      local lines = {}
      if (msg0:find("^Compile error") or msg0:find("^Parse error")) then
        table.insert(lines, msg0)
      else
        local newmsg = msg0:gsub("^[^:]*:%d+:%s+", "runtime error: ")
        table.insert(lines, newmsg)
      end
      table.insert(lines, "stack traceback:")
      local done_3f, level = false, (start or 2)
      while not done_3f do
        do
          local _1_0 = debug.getinfo(level, "Sln")
          if (_1_0 == nil) then
            done_3f = true
          elseif (nil ~= _1_0) then
            local info = _1_0
            table.insert(lines, traceback_frame(info))
          end
        end
        level = (level + 1)
      end
      return table.concat(lines, "\n")
    end
  end
  local function entry_transform(fk, fv)
    local function _0_(k, v)
      if (type(k) == "number") then
        return k, fv(v)
      else
        return fk(k), fv(v)
      end
    end
    return _0_
  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
      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 = nil
      if form.filename then
        filename = string.format("%q", form.filename)
      else
        filename = "nil"
      end
      local symstr = utils.deref(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 (utils.deref(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 = nil
      local function _0_()
        return nil
      end
      mapped = utils.kvmap(form, entry_transform(_0_, q))
      local filename = nil
      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 = nil
      if source.filename then
        filename = string.format("%q", source.filename)
      else
        filename = "nil"
      end
      local _1_
      if source then
        _1_ = source.line
      else
        _1_ = "nil"
      end
      return string.format("setmetatable({%s}, {filename=%s, line=%s, sequence=%s})", mixed_concat(mapped, ", "), filename, _1_, "(getmetatable(sequence()))['sequence']")
    elseif (type(form) == "table") then
      local mapped = utils.kvmap(form, entry_transform(q, q))
      local source = getmetatable(form)
      local filename = nil
      if source.filename then
        filename = string.format("%q", source.filename)
      else
        filename = "nil"
      end
      local function _1_()
        if source then
          return source.line
        else
          return "nil"
        end
      end
      return string.format("setmetatable({%s}, {filename=%s, line=%s})", mixed_concat(mapped, ", "), filename, _1_())
    elseif (type(form) == "string") then
      return serialize_string(form)
    else
      return tostring(form)
    end
  end
  return {["apply-manglings"] = apply_manglings, ["compile-stream"] = compile_stream, ["compile-string"] = compile_string, ["declare-local"] = declare_local, ["do-quote"] = do_quote, ["global-mangling"] = global_mangling, ["global-unmangling"] = global_unmangling, ["keep-side-effects"] = keep_side_effects, ["make-scope"] = make_scope, ["require-include"] = require_include, ["symbol-to-expression"] = symbol_to_expression, assert = assert_compile, autogensym = autogensym, compile = compile, compile1 = compile1, destructure = destructure, emit = emit, gensym = gensym, macroexpand = macroexpand_2a, metadata = make_metadata(), scopes = scopes, traceback = traceback}
end
package.preload["fennel.friend"] = package.preload["fennel.friend"] or function(...)
  local function ast_source(ast)
    local m = getmetatable(ast)
    return ((m and m.line and m) or (("table" == type(ast)) and ast) or {})
  end
  local suggestions = {["$ and $... in hashfn are mutually exclusive"] = {"modifying the hashfn so it only contains $... or $, $1, $2, $3, etc"}, ["can't start multisym segment with a digit"] = {"removing the digit", "adding a non-digit before the digit"}, ["cannot call literal value"] = {"checking for typos", "checking for a missing function name"}, ["could not compile value of type "] = {"debugging the macro you're calling to return a list or table"}, ["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"}, ["expected a function.* to call"] = {"removing the empty parentheses", "using square brackets if you want an empty table"}, ["expected binding and iterator"] = {"making sure you haven't omitted a local name or iterator"}, ["expected binding table"] = {"placing a table here in square brackets containing identifiers to bind"}, ["expected body expression"] = {"putting some code in the body of this form after the bindings"}, ["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"}, ["expected even number of name/value bindings"] = {"finding where the identifier or value is missing"}, ["expected even number of values in table literal"] = {"removing a key", "adding a value"}, ["expected local"] = {"looking for a typo", "looking for a local which is used out of its scope"}, ["expected macros to be table"] = {"ensuring your macro definitions return a table"}, ["expected parameters"] = {"adding function parameters as a list of identifiers in brackets"}, ["expected rest argument before last parameter"] = {"moving & to right before the final identifier when destructuring"}, ["expected symbol for function parameter: (.*)"] = {"changing %s to an identifier instead of a literal value"}, ["expected var (.*)"] = {"declaring %s using var instead of let/local", "introducing a new local instead of changing the value of %s"}, ["expected vararg as last parameter"] = {"moving the \"...\" to the end of the parameter list"}, ["expected whitespace before opening delimiter"] = {"adding whitespace"}, ["global (.*) conflicts with local"] = {"renaming local %s"}, ["illegal character: (.)"] = {"deleting or replacing %s", "avoiding reserved characters like \", \\, ', ~, ;, @, `, and comma"}, ["local (.*) was overshadowed by a special form or macro"] = {"renaming local %s"}, ["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"}, ["malformed multisym"] = {"ensuring each period or colon is not followed by another period or colon"}, ["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"}, ["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"}, ["mismatched closing delimiter (.), expected (.)"] = {"replacing %s with %s", "deleting %s", "adding matching opening delimiter earlier"}, ["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"}, ["unable to bind (.*)"] = {"replacing the %s with an identifier"}, ["unexpected closing delimiter (.)"] = {"deleting %s", "adding matching opening delimiter earlier"}, ["unexpected multi symbol (.*)"] = {"removing periods or colons from %s"}, ["unexpected vararg"] = {"putting \"...\" at the end of the fn parameters if the vararg was intended"}, ["unknown global in strict mode: (.*)"] = {"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"}, ["unused local (.*)"] = {"fixing a typo so %s is used", "renaming the local to _%s"}, ["use of global (.*) is aliased by a local"] = {"renaming local %s", "refer to the global using _G.%s instead of directly"}}
  local unpack = (table.unpack or _G.unpack)
  local function suggest(msg)
    local suggestion = nil
    for pat, sug in pairs(suggestions) do
      local matches = {msg:match(pat)}
      if (0 < #matches) then
        if ("table" == type(sug)) then
          local out = {}
          for _, s in ipairs(sug) do
            table.insert(out, s:format(unpack(matches)))
          end
          suggestion = out
        else
          suggestion = sug(matches)
        end
      end
    end
    return suggestion
  end
  local function read_line_from_file(filename, line)
    local bytes = 0
    local f = assert(io.open(filename))
    local _ = nil
    for _0 = 1, (line - 1) do
      bytes = (bytes + 1 + #f:read())
    end
    _ = nil
    local codeline = f:read()
    f:close()
    return codeline, bytes
  end
  local function read_line_from_string(matcher, target_line, _3fcurrent_line, _3fbytes)
    local this_line, newline = matcher()
    local current_line = (_3fcurrent_line or 1)
    local bytes = ((_3fbytes or 0) + #this_line + #newline)
    if (target_line == current_line) then
      return this_line, bytes
    elseif this_line then
      return read_line_from_string(matcher, target_line, (current_line + 1), bytes)
    end
  end
  local function read_line(filename, line, source)
    if source then
      return read_line_from_string(string.gmatch((source .. "\n"), "(.-)(\13?\n)"), line)
    else
      return read_line_from_file(filename, line)
    end
  end
  local function friendly_msg(msg, _0_0, source)
    local _1_ = _0_0
    local byteend = _1_["byteend"]
    local bytestart = _1_["bytestart"]
    local filename = _1_["filename"]
    local line = _1_["line"]
    local ok, codeline, bol = pcall(read_line, filename, line, source)
    local suggestions0 = suggest(msg)
    local out = {msg, ""}
    if (ok and codeline) then
      table.insert(out, codeline)
    end
    if (ok and codeline and bytestart and byteend) then
      table.insert(out, (string.rep(" ", (bytestart - bol - 1)) .. "^" .. string.rep("^", math.min((byteend - bytestart), ((bol + #codeline) - bytestart)))))
    end
    if (ok and codeline and bytestart and not byteend) then
      table.insert(out, (string.rep("-", (bytestart - bol - 1)) .. "^"))
      table.insert(out, "")
    end
    if suggestions0 then
      for _, suggestion in ipairs(suggestions0) do
        table.insert(out, ("* Try %s."):format(suggestion))
      end
    end
    return table.concat(out, "\n")
  end
  local function assert_compile(condition, msg, ast, source)
    if not condition then
      local _1_ = ast_source(ast)
      local filename = _1_["filename"]
      local line = _1_["line"]
      error(friendly_msg(("Compile error in %s:%s\n  %s"):format((filename or "unknown"), (line or "?"), msg), ast_source(ast), source), 0)
    end
    return condition
  end
  local function parse_error(msg, filename, line, bytestart, source)
    return error(friendly_msg(("Parse error in %s:%s\n  %s"):format(filename, line, msg), {bytestart = bytestart, filename = filename, line = line}, source), 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 _0_(parser_state)
      if not done_3f then
        if (index <= #c) then
          local b = c:byte(index)
          index = (index + 1)
          return b
        else
          local _1_0, _2_0, _3_0 = getchunk(parser_state)
          local _4_
          do
            local char = _1_0
            _4_ = ((nil ~= _1_0) and (char ~= ""))
          end
          if _4_ then
            local char = _1_0
            c = char
            index = 2
            return c:byte()
          else
            local _ = _1_0
            done_3f = true
            return nil
          end
        end
      end
    end
    local function _1_()
      c = ""
      return nil
    end
    return _0_, _1_
  end
  local function string_stream(str)
    local str0 = str:gsub("^#!", ";;")
    local index = 1
    local function _0_()
      local r = str0:byte(index)
      index = (index + 1)
      return r
    end
    return _0_
  end
  local delims = {[123] = 125, [125] = true, [40] = 41, [41] = true, [91] = 93, [93] = true}
  local function whitespace_3f(b)
    return ((b == 32) or ((b >= 9) and (b <= 13)))
  end
  local function sym_char_3f(b)
    local b0 = nil
    if ("number" == type(b)) then
      b0 = b
    else
      b0 = string.byte(b)
    end
    return ((b0 > 32) 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 parser(getbyte, filename, options)
    local stack = {}
    local line = 1
    local byteindex = 0
    local lastb = nil
    local function ungetb(ub)
      if (ub == 10) then
        line = (line - 1)
      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 == 10) then
        line = (line + 1)
      end
      return r
    end
    assert(((nil == filename) or ("string" == type(filename))), "expected filename as second argument to parser")
    local function parse_error(msg, byteindex_override)
      local _0_ = (options or utils.root.options or {})
      local source = _0_["source"]
      local unfriendly = _0_["unfriendly"]
      utils.root.reset()
      if unfriendly then
        return error(string.format("Parse error in %s:%s: %s", (filename or "unknown"), (line or "?"), msg), 0)
      else
        return friend["parse-error"](msg, (filename or "unknown"), (line or "?"), (byteindex_override or byteindex), source)
      end
    end
    local function parse_stream()
      local whitespace_since_dispatch, done_3f, retval = true
      local function dispatch(v)
        local _0_0 = stack[#stack]
        if (_0_0 == nil) then
          retval, done_3f, whitespace_since_dispatch = v, true, false
          return nil
        elseif ((type(_0_0) == "table") and (nil ~= _0_0.prefix)) then
          local prefix = _0_0.prefix
          local source = nil
          do
            local _1_0 = table.remove(stack)
            _1_0["byteend"] = byteindex
            source = _1_0
          end
          local list = utils.list(utils.sym(prefix, source), v)
          for k, v0 in pairs(source) do
            list[k] = v0
          end
          return dispatch(list)
        elseif (nil ~= _0_0) then
          local top = _0_0
          whitespace_since_dispatch = false
          return table.insert(top, v)
        end
      end
      local function badend()
        local accum = utils.map(stack, "closer")
        local _0_
        if (#stack == 1) then
          _0_ = ""
        else
          _0_ = "s"
        end
        return parse_error(string.format("expected closing delimiter%s %s", _0_, 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 (#stack > 0)) then
          return badend()
        else
          return b
        end
      end
      local function parse_comment(b, contents)
        if (b and (10 ~= b)) then
          local function _1_()
            local _0_0 = contents
            table.insert(_0_0, string.char(b))
            return _0_0
          end
          return parse_comment(getb(), _1_())
        elseif (options and options.comments) then
          return dispatch(utils.comment(table.concat(contents), {filename = filename, line = (line - 1)}))
        else
          return b
        end
      end
      local function open_table(b)
        if not whitespace_since_dispatch then
          parse_error(("expected whitespace before opening delimiter " .. string.char(b)))
        end
        return table.insert(stack, {bytestart = byteindex, closer = delims[b], filename = filename, line = line})
      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(comments, index, node)
        local _0_0 = comments[index]
        if (nil ~= _0_0) then
          local existing = _0_0
          return table.insert(existing, node)
        else
          local _ = _0_0
          comments[index] = {node}
          return nil
        end
      end
      local function next_noncomment(tbl, i)
        if utils["comment?"](tbl[i]) then
          return next_noncomment(tbl, (i + 1))
        else
          return tbl[i]
        end
      end
      local function extract_comments(tbl)
        local comments = {keys = {}, last = {}, values = {}}
        while utils["comment?"](tbl[#tbl]) do
          table.insert(comments.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(comments.values, next_noncomment(tbl, i), node)
          else
            add_comment_at(comments.keys, next_noncomment(tbl, i), node)
          end
        end
        for i = #tbl, 1, -1 do
          if utils["comment?"](tbl[i]) then
            table.remove(tbl, i)
          end
        end
        return comments
      end
      local function close_curly_table(tbl)
        local comments = 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")
        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)])
          end
          val[tbl[i]] = tbl[(i + 1)]
          table.insert(keys, tbl[i])
        end
        tbl.comments = comments
        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)))
        end
        if (top.closer and (top.closer ~= b)) then
          parse_error(("mismatched closing delimiter " .. string.char(b) .. ", expected " .. string.char(top.closer)))
        end
        top.byteend = byteindex
        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 = nil
        do
          local _0_0 = {state, b}
          if ((type(_0_0) == "table") and (_0_0[1] == "base") and (_0_0[2] == 92)) then
            state0 = "backslash"
          elseif ((type(_0_0) == "table") and (_0_0[1] == "base") and (_0_0[2] == 34)) then
            state0 = "done"
          else
            local _ = _0_0
            state0 = "base"
          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 ({[10] = "\\n", [11] = "\\v", [12] = "\\f", [13] = "\\r", [7] = "\\a", [8] = "\\b", [9] = "\\t"})[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()
        end
        table.remove(stack)
        local raw = string.char(unpack(chars))
        local formatted = raw:gsub("[\7-\13]", escape_char)
        local load_fn = (rawget(_G, "loadstring") or load)(("return " .. formatted))
        return dispatch(load_fn())
      end
      local function parse_prefix(b)
        table.insert(stack, {bytestart = byteindex, filename = filename, line = line, prefix = prefixes[b]})
        local nextb = getb()
        if (whitespace_3f(nextb) or (true == delims[nextb])) then
          if (b ~= 35) then
            parse_error("invalid whitespace after quoting prefix")
          end
          table.remove(stack)
          dispatch(utils.sym("#"))
        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)
          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 _0_0 = tonumber(number_with_stripped_underscores)
          if (nil ~= _0_0) then
            local x = _0_0
            dispatch(x)
            return true
          else
            local _ = _0_0
            return false
          end
        end
      end
      local function check_malformed_sym(rawstr)
        if (rawstr:match("^~") and (rawstr ~= "~=")) then
          return parse_error("illegal character: ~")
        elseif rawstr:match("%.[0-9]") then
          return parse_error(("can't start multisym segment with a digit: " .. rawstr), (((byteindex - #rawstr) + rawstr:find("%.[0-9]")) + 1))
        elseif (rawstr:match("[%.:][%.:]") and (rawstr ~= "..") and (rawstr ~= "$...")) then
          return parse_error(("malformed multisym: " .. rawstr), ((byteindex - #rawstr) + 1 + rawstr:find("[%.:][%.:]")))
        elseif rawstr:match(":.+[%.:]") then
          return parse_error(("method must be last component of multisym: " .. rawstr), ((byteindex - #rawstr) + rawstr:find(":.+[%.:]")))
        else
          return rawstr
        end
      end
      local function parse_sym(b)
        local bytestart = byteindex
        local rawstr = string.char(unpack(parse_sym_loop({b}, getb())))
        if (rawstr == "true") then
          return dispatch(true)
        elseif (rawstr == "false") then
          return dispatch(false)
        elseif (rawstr == "...") then
          return dispatch(utils.varg())
        elseif rawstr:match("^:.+$") then
          return dispatch(rawstr:sub(2))
        elseif not parse_number(rawstr) then
          return dispatch(utils.sym(check_malformed_sym(rawstr), {byteend = byteindex, bytestart = bytestart, filename = filename, line = line}))
        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)
        else
          parse_error(("illegal character: " .. string.char(b)))
        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 _0_()
      stack = {}
      return nil
    end
    return parse_stream, _0_
  end
  return {["string-stream"] = string_stream, ["sym-char?"] = sym_char_3f, granulate = granulate, parser = parser}
end
local utils = nil
package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(...)
  local function stablepairs(t)
    local keys = {}
    local succ = {}
    for k in pairs(t) do
      table.insert(keys, k)
    end
    local function _0_(_241, _242)
      return (tostring(_241) < tostring(_242))
    end
    table.sort(keys, _0_)
    for i, k in ipairs(keys) do
      succ[k] = keys[(i + 1)]
    end
    local function stablenext(tbl, idx)
      local key = nil
      if (idx == nil) then
        key = keys[1]
      else
        key = succ[idx]
      end
      local value = nil
      if (key == nil) then
        value = nil
      else
        value = tbl[key]
      end
      return key, value
    end
    return stablenext, t, nil
  end
  local function map(t, f, out)
    local out0 = (out or {})
    local f0 = nil
    if (type(f) == "function") then
      f0 = f
    else
      local function _0_(_241)
        return _241[f]
      end
      f0 = _0_
    end
    for _, x in ipairs(t) do
      local _1_0 = f0(x)
      if (nil ~= _1_0) then
        local v = _1_0
        table.insert(out0, v)
      end
    end
    return out0
  end
  local function kvmap(t, f, out)
    local out0 = (out or {})
    local f0 = nil
    if (type(f) == "function") then
      f0 = f
    else
      local function _0_(_241)
        return _241[f]
      end
      f0 = _0_
    end
    for k, x in stablepairs(t) do
      local _1_0, _2_0 = f0(k, x)
      if ((nil ~= _1_0) and (nil ~= _2_0)) then
        local key = _1_0
        local value = _2_0
        out0[key] = value
      elseif (nil ~= _1_0) then
        local value = _1_0
        table.insert(out0, value)
      end
    end
    return out0
  end
  local function copy(from, to)
    local to0 = (to or {})
    for k, v in pairs((from or {})) do
      to0[k] = v
    end
    return to0
  end
  local function member_3f(x, tbl, n)
    local _0_0 = tbl[(n or 1)]
    if (_0_0 == x) then
      return true
    elseif (_0_0 == nil) then
      return nil
    else
      local _ = _0_0
      return member_3f(x, tbl, ((n or 1) + 1))
    end
  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 meta = getmetatable(t)
        if (meta and meta.__index) then
          t = meta.__index
          return allpairs_next(t)
        end
      end
    end
    return allpairs_next
  end
  local function deref(self)
    return self[1]
  end
  local nil_sym = nil
  local function list__3estring(self, tostring2)
    local safe, max = {}, 0
    for k in pairs(self) do
      if ((type(k) == "number") and (k > max)) then
        max = k
      end
    end
    for i = 1, max do
      safe[i] = (((self[i] == nil) and nil_sym) or self[i])
    end
    return ("(" .. table.concat(map(safe, (tostring2 or tostring)), " ", 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 = {"SYMBOL", __eq = sym_3d, __fennelview = deref, __lt = sym_3c, __tostring = deref}
  local expr_mt = {"EXPR", __tostring = deref}
  local list_mt = {"LIST", __fennelview = list__3estring, __tostring = list__3estring}
  local comment_mt = {"COMMENT", __eq = sym_3d, __fennelview = comment_view, __lt = sym_3c, __tostring = deref}
  local sequence_marker = {"SEQUENCE"}
  local vararg = setmetatable({"..."}, {"VARARG", __fennelview = deref, __tostring = deref})
  local getenv = nil
  local function _0_()
    return nil
  end
  getenv = ((os and os.getenv) or _0_)
  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, _3fscope)
    local s = {str, ["?scope"] = _3fscope}
    for k, v in pairs((_3fsource or {})) do
      if (type(k) == "string") then
        s[k] = v
      end
    end
    return setmetatable(s, symbol_mt)
  end
  nil_sym = sym("nil")
  local function sequence(...)
    return setmetatable({...}, {sequence = sequence_marker})
  end
  local function expr(strcode, etype)
    return setmetatable({strcode, type = etype}, expr_mt)
  end
  local function comment_2a(contents, _3fsource)
    local _1_ = (_3fsource or {})
    local filename = _1_["filename"]
    local line = _1_["line"]
    return setmetatable({contents, filename = filename, line = line}, comment_mt)
  end
  local function varg()
    return vararg
  end
  local function expr_3f(x)
    return ((type(x) == "table") and (getmetatable(x) == expr_mt) and x)
  end
  local function varg_3f(x)
    return ((x == vararg) 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 (x ~= vararg) and (getmetatable(x) ~= list_mt) and (getmetatable(x) ~= symbol_mt) and not comment_3f(x) and x)
  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 parts = {}
      for part in str:gmatch("[^%.%:]+[%.%:]?") do
        local last_char = part:sub(( - 1))
        if (last_char == ":") then
          parts["multi-sym-method-call"] = true
        end
        if ((last_char == ":") or (last_char == ".")) then
          parts[(#parts + 1)] = part:sub(1, ( - 2))
        else
          parts[(#parts + 1)] = part
        end
      end
      return ((#parts > 0) and (str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and parts)
    end
  end
  local function quoted_3f(symbol)
    return symbol.quoted
  end
  local function walk_tree(root, f, custom_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
      end
    end
    walk((custom_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 = nil
  local function _1_()
  end
  root = {chunk = nil, options = nil, reset = _1_, scope = nil}
  root["set-reset"] = function(_2_0)
    local _3_ = _2_0
    local chunk = _3_["chunk"]
    local options = _3_["options"]
    local reset = _3_["reset"]
    local scope = _3_["scope"]
    root.reset = function()
      root.chunk, root.scope, root.options, root.reset = chunk, scope, options, reset
      return nil
    end
    return root.reset
  end
  local function hook(event, ...)
    if (root.options and root.options.plugins) then
      for _, plugin in ipairs(root.options.plugins) do
        local _3_0 = plugin[event]
        if (nil ~= _3_0) then
          local f = _3_0
          f(...)
        end
      end
      return nil
    end
  end
  return {["comment?"] = comment_3f, ["debug-on?"] = debug_on_3f, ["expr?"] = expr_3f, ["list?"] = list_3f, ["lua-keywords"] = lua_keywords, ["member?"] = member_3f, ["multi-sym?"] = multi_sym_3f, ["propagate-options"] = propagate_options, ["quoted?"] = quoted_3f, ["sequence?"] = sequence_3f, ["sym?"] = sym_3f, ["table?"] = table_3f, ["valid-lua-identifier?"] = valid_lua_identifier_3f, ["varg?"] = varg_3f, ["walk-tree"] = walk_tree, allpairs = allpairs, comment = comment_2a, copy = copy, deref = deref, expr = expr, hook = hook, kvmap = kvmap, list = list, map = map, path = table.concat({"./?.fnl", "./?/init.fnl", getenv("FENNEL_PATH")}, ";"), root = root, sequence = sequence, stablepairs = stablepairs, sym = sym, varg = varg}
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)
  if (env == "_COMPILER") then
    local env0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
    local mt = getmetatable(env0)
    mt.__index = _G
    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) and not getmetatable(opts.env)) then
    opts.allowedGlobals = specials["current-global-names"](opts.env)
  end
  if (not opts.filename and not opts.source) then
    opts.source = str
  end
  if (opts.env == "_COMPILER") then
    opts.scope = compiler["make-scope"](compiler.scopes.compiler)
  end
  return opts
end
local function eval(str, options, ...)
  local opts = eval_opts(options, str)
  local env = eval_env(opts.env)
  local lua_source = compiler["compile-string"](str, opts)
  local loader = nil
  local function _0_(...)
    if opts.filename then
      return ("@" .. opts.filename)
    else
      return str
    end
  end
  loader = specials["load-code"](lua_source, env, _0_(...))
  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", "lambda", "\206\187", "macro", "match"}
  local binding_3f = {"collect", "icollect", "each", "for", "let", "with-open"}
  local out = {}
  for k, v in pairs(compiler.scopes.global.specials) do
    local metadata = (compiler.metadata[v] or {})
    out[k] = {["binding-form?"] = utils["member?"](binding_3f, k), ["body-form?"] = metadata["fnl/body-form?"], ["special?"] = true}
  end
  for k, v in pairs(compiler.scopes.global.macros) do
    out[k] = {["binding-form?"] = utils["member?"](binding_3f, k), ["body-form?"] = utils["member?"](body_3f, k), ["macro?"] = true}
  end
  for k, v in pairs(_G) do
    local _0_0 = type(v)
    if (_0_0 == "function") then
      out[k] = {["global?"] = true}
    elseif (_0_0 == "table") then
      for k2, v2 in pairs(v) do
        if ("function" == type(v2)) then
          out[(k .. "." .. k2)] = {["function?"] = true}
        end
      end
    end
  end
  return out
end
local mod = {["comment?"] = utils["comment?"], ["compile-stream"] = compiler["compile-stream"], ["compile-string"] = compiler["compile-string"], ["list?"] = utils["list?"], ["load-code"] = specials["load-code"], ["macro-loaded"] = specials["macro-loaded"], ["macro-searchers"] = specials["macro-searchers"], ["make-searcher"] = specials["make-searcher"], ["search-module"] = specials["search-module"], ["sequence?"] = utils["sequence?"], ["string-stream"] = parser["string-stream"], ["sym-char?"] = parser["sym-char?"], ["sym?"] = utils["sym?"], comment = utils.comment, compile = compiler.compile, compile1 = compiler.compile1, compileStream = compiler["compile-stream"], compileString = compiler["compile-string"], doc = specials.doc, dofile = dofile_2a, eval = eval, gensym = compiler.gensym, granulate = parser.granulate, list = utils.list, loadCode = specials["load-code"], macroLoaded = specials["macro-loaded"], makeSearcher = specials["make-searcher"], make_searcher = specials["make-searcher"], mangle = compiler["global-mangling"], metadata = compiler.metadata, parser = parser.parser, path = utils.path, repl = repl, scope = compiler["make-scope"], searchModule = specials["search-module"], searcher = specials["make-searcher"](), sequence = utils.sequence, stringStream = parser["string-stream"], sym = utils.sym, syntax = syntax, traceback = compiler.traceback, unmangle = compiler["global-unmangling"], varg = utils.varg, version = "0.9.3-dev", view = view}
utils["fennel-module"] = mod
do
  local builtin_macros = [===[;; This module contains all the built-in Fennel macros. Unlike all the other
  ;; modules that are loaded by the old bootstrap compiler, this runs in the
  ;; compiler scope of the version of the compiler being defined.
  
  ;; The code for these macros is somewhat idiosyncratic because it cannot use any
  ;; macros which have not yet been defined.
  
  ;; TODO: some of these macros modify their arguments; we should stop doing that,
  ;; but in a way that preserves file/line metadata.
  
  (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) 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 (pairs [...])]
      (let [elt (if (list? e) e (list e))]
        (table.insert elt x)
        (set x elt)))
    x)
  
  (fn -?>* [val ...]
    "Nil-safe thread-first macro.
  Same as -> except will short-circuit with nil when it encounters a nil value."
    (if (= 0 (select "#" ...))
        val
        (let [els [...]
              e (table.remove els 1)
              el (if (list? e) e (list e))
              tmp (gensym)]
          (table.insert el 2 tmp)
          `(let [,tmp ,val]
             (if ,tmp
                 (-?> ,el ,(unpack els))
                 ,tmp)))))
  
  (fn -?>>* [val ...]
    "Nil-safe thread-last macro.
  Same as ->> except will short-circuit with nil when it encounters a nil value."
    (if (= 0 (select "#" ...))
        val
        (let [els [...]
              e (table.remove els 1)
              el (if (list? e) e (list e))
              tmp (gensym)]
          (table.insert el tmp)
          `(let [,tmp ,val]
             (if ,tmp
                 (-?>> ,el ,(unpack els))
                 ,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 if blocks.
        (table.insert lookups (# lookups) `(if (not= nil ,head)
                                             (set ,head (. ,head ,k)))))
      lookups))
  
  (fn doto* [val ...]
    "Evaluates val and splices it into the first argument of subsequent forms."
    (let [name (gensym)
          form `(let [,name ,val])]
      (each [_ elt (pairs [...])]
        (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# (xpcall ,bodyfn ,traceback)))))
  
  (fn collect* [iter-tbl key-value-expr ...]
    "Returns 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 provided key-value
  expression must return either 2 values, or nil.
  
  For example,
    (collect [k v (pairs {:apple \"red\" :orange \"orange\"})]
      (values v k))
  returns
    {:red \"apple\" :orange \"orange\"}"
    (assert (and (sequence? iter-tbl) (>= (length iter-tbl) 2))
            "expected iterator binding table")
    (assert (not= nil key-value-expr) "expected key-value expression")
    (assert (= nil ...)
            "expected exactly one body expression. Wrap multiple expressions with do")
    `(let [tbl# {}]
       (each ,iter-tbl
         (match ,key-value-expr
           (k# v#) (tset tbl# k# v#)))
       tbl#))
  
  (fn icollect* [iter-tbl value-expr ...]
    "Returns 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 \"list comprehension\".
  
  For example,
    (icollect [_ v (ipairs [1 2 3 4 5])] (when (> v 2) (* v v)))
  returns
    [9 16 25]"
    (assert (and (sequence? iter-tbl) (>= (length iter-tbl) 2))
            "expected iterator binding table")
    (assert (not= nil value-expr) "expected table value expression")
    (assert (= nil ...)
            "expected exactly one body expression. Wrap multiple expressions with do")
    `(let [tbl# []]
       (each ,iter-tbl
         (tset tbl# (+ (length tbl#) 1) ,value-expr))
       tbl#))
  
  (fn partial* [f ...]
    "Returns a function with all arguments partially applied to f."
    (assert f "expected a function to partially apply")
    (let [body (list f ...)]
      (table.insert body _VARARG)
      `(fn [,_VARARG]
         ,body)))
  
  (fn pick-args* [n f]
    "Creates 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_))"
    (assert (and (= (type n) :number) (= n (math.floor n)) (>= n 0))
            (.. "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 ...]
    "Like the `values` special, but emits exactly n values.
  
  For example,
    (pick-values 2 ...)
  expands to
    (let [(_0_ _1_) ...]
      (values _0_ _1_))"
    (assert (and (= :number (type n)) (>= n 0) (= 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 arity checking.
  Will throw an exception if a declared argument is passed in as nil, unless
  that argument name begins with ?."
    (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 (> (length args) docstring-position)
                              (= :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 "...")))
            (table.insert args arity-check-position
                          `(assert (not= nil ,a)
                                   (string.format "Missing argument %s on %s:%s"
                                                  ,(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 ...]
    "Binds 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]
      (let [(binding modname) (select i binding1 module-name1 ...)
            ;; generate a subscope of current scope, use require-macros
            ;; to bring in macro module. after that, we just copy the
            ;; macros from subscope to scope.
            scope (get-scope)
            subscope (fennel.scope scope)]
        (_SPECIALS.require-macros `(require-macros ,modname) subscope {} ast)
        (if (sym? binding)
            ;; bind whole table of macros to table bound to symbol
            (do
              (tset scope.macros (. binding 1) {})
              (each [k v (pairs subscope.macros)]
                (tset (. scope.macros (. binding 1)) k v)))
            ;; 1-level table destructuring for importing individual macros
            (table? binding)
            (each [macro-name [import-key] (pairs binding)]
              (assert (= :function (type (. subscope.macros macro-name)))
                      (.. "macro " macro-name " not found in module "
                          (tostring modname)))
              (tset scope.macros import-key (. subscope.macros macro-name))))))
    nil)
  
  ;;; Pattern matching
  
  (fn match-values [vals pattern unifications match-pattern]
    (let [condition `(and)
          bindings []]
      (each [i pat (ipairs pattern)]
        (let [(subcondition subbindings) (match-pattern [(. vals i)] pat
                                                        unifications)]
          (table.insert condition subcondition)
          (each [_ b (ipairs subbindings)]
            (table.insert bindings b))))
      (values condition bindings)))
  
  (fn match-table [val pattern unifications match-pattern]
    (let [condition `(and (= (type ,val) :table))
          bindings []]
      (each [k pat (pairs pattern)]
        (if (= pat `&)
            (do
              (assert (= nil (. pattern (+ k 2)))
                      "expected & rest argument before last parameter")
              (table.insert bindings (. pattern (+ k 1)))
              (table.insert bindings
                            [`(select ,k ((or table.unpack _G.unpack) ,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) (match-pattern [subval] pat
                                                            unifications)]
              (table.insert condition subcondition)
              (each [_ b (ipairs subbindings)]
                (table.insert bindings b)))))
      (values condition bindings)))
  
  (fn match-pattern [vals pattern unifications]
    "Takes 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."
    ;; 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 (or (and (sym? pattern) ; unification with outer locals (or nil)
                   (not= "_" (tostring pattern)) ; never unify _
                   (or (in-scope? pattern) (= :nil (tostring pattern))))
              (and (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]))
          ;; guard clause
          (and (list? pattern) (= (. pattern 2) `?))
          (let [(pcondition bindings) (match-pattern vals (. pattern 1)
                                                     unifications)
                condition `(and ,(unpack pattern 3))]
            (values `(and ,pcondition
                          (let ,bindings
                            ,condition)) bindings))
          ;; multi-valued patterns (represented as lists)
          (list? pattern)
          (match-values vals pattern unifications match-pattern)
          ;; table patterns
          (= (type pattern) :table)
          (match-table val pattern unifications match-pattern)
          ;; literal value
          (values `(= ,val ,pattern) []))))
  
  (fn match-condition [vals clauses]
    "Construct the actual `if` AST for the given match values and clauses."
    (if (not= 0 (% (length clauses) 2)) ; treat odd final clause as default
        (table.insert clauses (length clauses) (sym "_")))
    (let [out `(if)]
      (for [i 1 (length clauses) 2]
        (let [pattern (. clauses i)
              body (. clauses (+ i 1))
              (condition bindings) (match-pattern vals pattern {})]
          (table.insert out condition)
          (table.insert out `(let ,bindings
                               ,body))))
      out))
  
  (fn match-val-syms [clauses]
    "How many multi-valued clauses are there? return a list of that many gensyms."
    (let [syms (list (gensym))]
      (for [i 1 (length clauses) 2]
        (let [clause (if (and (list? (. clauses i)) (= `? (. clauses i 2)))
                         (. clauses i 1)
                         (. clauses i))]
          (if (list? clause)
              (each [valnum (ipairs clause)]
                (if (not (. syms valnum))
                    (tset syms valnum (gensym)))))))
      syms))
  
  (fn match* [val ...]
    ;; Old implementation of match macro, which doesn't directly support
    ;; `where' and `or'. New syntax is implemented in `match-where',
    ;; which simply generates old syntax and feeds it to `match*'.
    (let [clauses [...]
          vals (match-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] (match-condition vals clauses))))
  
  ;; Construction of old match syntax from new syntax
  
  (fn partition-2 [seq]
    ;; Partition `seq` by 2.
    ;; If `seq` has odd amount of elements, the last one is dropped.
    ;;
    ;; Input: [1 2 3 4 5]
    ;; Output: [[1 2] [3 4]]
    (let [firsts []
          seconds []
          res []]
      (for [i 1 (length seq) 2]
        (let [first (. seq i)
              second (. seq (+ i 1))]
          (table.insert firsts (if (not= nil first) first `nil))
          (table.insert seconds (if (not= nil second) second `nil))))
      (each [i v1 (ipairs firsts)]
        (let [v2 (. seconds i)]
          (if (not= nil v2)
              (table.insert res [v1 v2]))))
      res))
  
  (fn transform-or [[_ & pats] guards]
    ;; Transforms `(or pat pats*)` lists into match `guard` patterns.
    ;;
    ;; (or pat1 pat2), guard => [(pat1 ? guard) (pat2 ? guard)]
    (let [res []]
      (each [_ pat (ipairs pats)]
        (table.insert res (list pat `? (unpack guards))))
      res))
  
  (fn transform-cond [cond]
    ;; Transforms `where` cond into sequence of `match` guards.
    ;;
    ;; pat => [pat]
    ;; (where pat guard) => [(pat ? guard)]
    ;; (where (or pat1 pat2) guard) => [(pat1 ? guard) (pat2 ? guard)]
    (if (and (list? cond) (= (. cond 1) `where))
        (let [second (. cond 2)]
          (if (and (list? second) (= (. second 1) `or))
              (transform-or second [(unpack cond 3)])
              :else
              [(list second `? (unpack cond 3))]))
        :else
        [cond]))
  
  (fn match-where [val ...]
    "Perform pattern matching on val. See reference for details.
  
  Syntax:
  
  (match data-expression
    pattern body
    (where pattern guard guards*) body
    (where (or pattern patterns*) guard guards*) body)"
    (let [conds-bodies (partition-2 [...])
          else-branch (if (not= 0 (% (select "#" ...) 2))
                          (select (select "#" ...) ...))
          match-body []]
      (each [_ [cond body] (ipairs conds-bodies)]
        (each [_ cond (ipairs (transform-cond cond))]
          (table.insert match-body cond)
          (table.insert match-body body)))
      (if else-branch
          (table.insert match-body else-branch))
      (match* val (unpack match-body))))
  
  {:-> ->*
   :->> ->>*
   :-?> -?>*
   :-?>> -?>>*
   :?. ?dot
   :doto doto*
   :when when*
   :with-open with-open*
   :collect collect*
   :icollect icollect*
   :partial partial*
   :lambda lambda*
   :pick-args pick-args*
   :pick-values pick-values*
   :macro macro*
   :macrodebug macrodebug*
   :import-macros import-macros*
   :match match-where}
  ]===]
  local module_name = "fennel.macros"
  local _ = nil
  local function _0_()
    return mod
  end
  package.preload[module_name] = _0_
  _ = nil
  local env = nil
  do
    local _1_0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
    _1_0["utils"] = utils
    _1_0["fennel"] = mod
    env = _1_0
  end
  local built_ins = eval(builtin_macros, {allowedGlobals = false, env = env, filename = "src/fennel/macros.fnl", moduleName = module_name, scope = compiler.scopes.compiler, useMetadata = true})
  for k, v in pairs(built_ins) do
    compiler.scopes.global.macros[k] = v
  end
  compiler.scopes.global.macros["\206\187"] = compiler.scopes.global.macros.lambda
  package.preload[module_name] = nil
end
return mod