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grav/fennel.lua

Last active August 2, 2023 08:41
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Fennel as a Lua library
Raw
fennel.lua
-- This file was compiled via instructions from https://github.com/bakpakin/Fennel#to-build-fennel-from-source
-- It was slightly modified by adding a line break to a specific line that was more than
-- 4096 characters (containing a dictionary), to be able to process it with Lua itself
package.preload["fennel.repl"] = package.preload["fennel.repl"] or function(...)
local utils = require("fennel.utils")
local parser = require("fennel.parser")
local compiler = require("fennel.compiler")
local specials = require("fennel.specials")
local view = require("fennel.view")
local unpack = (table.unpack or _G.unpack)
local function default_read_chunk(parser_state)
local function _607_()
if (0 < parser_state["stack-size"]) then
return ".."
else
return ">> "
end
end
io.write(_607_())
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 _609_()
local _608_0 = errtype
if (_608_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 (_608_0 == "Runtime") then
return (compiler.traceback(tostring(err), 4) .. "\n")
else
local _ = _608_0
return ("%s error: %s\n"):format(errtype, tostring(err))
end
end
return io.write(_609_())
end
local function splice_save_locals(env, lua_source, scope)
local saves = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for name in pairs(env.___replLocals___) do
local val_19_ = ("local %s = ___replLocals___['%s']"):format((scope.manglings[name] or name), name)
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
saves = tbl_17_
end
local binds = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for raw, name in pairs(scope.manglings) do
local val_19_ = nil
if not scope.gensyms[name] then
val_19_ = ("___replLocals___['%s'] = %s"):format(raw, name)
else
val_19_ = nil
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
binds = tbl_17_
end
local gap = nil
if lua_source:find("\n") then
gap = "\n"
else
gap = " "
end
local function _615_()
if next(saves) then
return (table.concat(saves, " ") .. gap)
else
return ""
end
end
local function _618_()
local _616_0, _617_0 = lua_source:match("^(.*)[\n ](return .*)$")
if ((nil ~= _616_0) and (nil ~= _617_0)) then
local body = _616_0
local _return = _617_0
return (body .. gap .. table.concat(binds, " ") .. gap .. _return)
else
local _ = _616_0
return lua_source
end
end
return (_615_() .. _618_())
end
local function completer(env, scope, text)
local max_items = 2000
local seen = {}
local matches = {}
local input_fragment = text:gsub(".*[%s)(]+", "")
local stop_looking_3f = false
local function add_partials(input, tbl, prefix)
local scope_first_3f = ((tbl == env) or (tbl == env.___replLocals___))
local tbl_17_ = matches
local i_18_ = #tbl_17_
local function _620_()
if scope_first_3f then
return scope.manglings
else
return tbl
end
end
for k, is_mangled in utils.allpairs(_620_()) do
if (max_items <= #matches) then break end
local val_19_ = nil
do
local lookup_k = nil
if scope_first_3f then
lookup_k = is_mangled
else
lookup_k = k
end
if ((type(k) == "string") and (input == k:sub(0, #input)) and not seen[k] and ((":" ~= prefix:sub(-1)) or ("function" == type(tbl[lookup_k])))) then
seen[k] = true
val_19_ = (prefix .. k)
else
val_19_ = nil
end
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
return tbl_17_
end
local function descend(input, tbl, prefix, add_matches, method_3f)
local splitter = nil
if method_3f then
splitter = "^([^:]+):(.*)"
else
splitter = "^([^.]+)%.(.*)"
end
local head, tail = input:match(splitter)
local raw_head = (scope.manglings[head] or head)
if (type(tbl[raw_head]) == "table") then
stop_looking_3f = true
if method_3f then
return add_partials(tail, tbl[raw_head], (prefix .. head .. ":"))
else
return add_matches(tail, tbl[raw_head], (prefix .. head))
end
end
end
local function add_matches(input, tbl, prefix)
local prefix0 = nil
if prefix then
prefix0 = (prefix .. ".")
else
prefix0 = ""
end
if (not input:find("%.") and input:find(":")) then
return descend(input, tbl, prefix0, add_matches, true)
elseif not input:find("%.") then
return add_partials(input, tbl, prefix0)
else
return descend(input, tbl, prefix0, add_matches, false)
end
end
for _, source in ipairs({scope.specials, scope.macros, (env.___replLocals___ or {}), env, env._G}) do
if stop_looking_3f then break end
add_matches(input_fragment, source)
end
return matches
end
local commands = {}
local function command_3f(input)
return input:match("^%s*,")
end
local function command_docs()
local _629_
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for name, f in pairs(commands) do
local val_19_ = (" ,%s - %s"):format(name, ((compiler.metadata):get(f, "fnl/docstring") or "undocumented"))
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
_629_ = tbl_17_
end
return table.concat(_629_, "\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 _631_0, _632_0 = pcall(specials["load-code"]("return require(...)", env), module_name)
if ((_631_0 == true) and (nil ~= _632_0)) then
local old = _632_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
specials["macro-loaded"][module_name] = nil
if ((type(old) == "table") and (type(new0) == "table")) then
for k, v in pairs(new0) do
old[k] = v
end
for k in pairs(old) do
if (nil == new0[k]) then
old[k] = nil
end
end
package.loaded[module_name] = old
end
return on_values({"ok"})
elseif ((_631_0 == false) and (nil ~= _632_0)) then
local msg = _632_0
if msg:match("loop or previous error loading module") then
package.loaded[module_name] = nil
return reload(module_name, env, on_values, on_error)
elseif specials["macro-loaded"][module_name] then
specials["macro-loaded"][module_name] = nil
return nil
else
local function _637_()
local _636_0 = msg:gsub("\n.*", "")
return _636_0
end
return on_error("Runtime", _637_())
end
end
end
local function run_command(read, on_error, f)
local _640_0, _641_0, _642_0 = pcall(read)
if ((_640_0 == true) and (_641_0 == true) and (nil ~= _642_0)) then
local val = _642_0
local _643_0, _644_0 = pcall(f, val)
if ((_643_0 == false) and (nil ~= _644_0)) then
local msg = _644_0
return on_error("Runtime", msg)
end
elseif (_640_0 == false) then
return on_error("Parse", "Couldn't parse input.")
end
end
commands.reload = function(env, read, on_values, on_error)
local function _647_(_241)
return reload(tostring(_241), env, on_values, on_error)
end
return run_command(read, on_error, _647_)
end
do end (compiler.metadata):set(commands.reload, "fnl/docstring", "Reload the specified module.")
commands.reset = function(env, _, on_values)
env.___replLocals___ = {}
return on_values({"ok"})
end
do end (compiler.metadata):set(commands.reset, "fnl/docstring", "Erase all repl-local scope.")
commands.complete = function(env, read, on_values, on_error, scope, chars)
local function _648_()
return on_values(completer(env, scope, table.concat(chars):gsub(",complete +", ""):sub(1, -2)))
end
return run_command(read, on_error, _648_)
end
do end (compiler.metadata):set(commands.complete, "fnl/docstring", "Print all possible completions for a given input symbol.")
local function apropos_2a(pattern, tbl, prefix, seen, names)
for name, subtbl in pairs(tbl) do
if (("string" == type(name)) and (package ~= subtbl)) then
local _649_0 = type(subtbl)
if (_649_0 == "function") then
if ((prefix .. name)):match(pattern) then
table.insert(names, (prefix .. name))
end
elseif (_649_0 == "table") then
if not seen[subtbl] then
local _651_
do
seen[subtbl] = true
_651_ = seen
end
apropos_2a(pattern, subtbl, (prefix .. name:gsub("%.", "/") .. "."), _651_, names)
end
end
end
end
return names
end
local function apropos(pattern)
local names = apropos_2a(pattern, package.loaded, "", {}, {})
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, name in ipairs(names) do
local val_19_ = name:gsub("^_G%.", "")
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
return tbl_17_
end
commands.apropos = function(_env, read, on_values, on_error, _scope)
local function _656_(_241)
return on_values(apropos(tostring(_241)))
end
return run_command(read, on_error, _656_)
end
do end (compiler.metadata):set(commands.apropos, "fnl/docstring", "Print all functions matching a pattern in all loaded modules.")
local function apropos_follow_path(path)
local paths = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for p in path:gmatch("[^%.]+") do
local val_19_ = p
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
paths = tbl_17_
end
local tgt = package.loaded
for _, path0 in ipairs(paths) do
if (nil == tgt) then break end
local _659_
do
local _658_0 = path0:gsub("%/", ".")
_659_ = _658_0
end
tgt = tgt[_659_]
end
return tgt
end
local function apropos_doc(pattern)
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, path in ipairs(apropos(".*")) do
local val_19_ = nil
do
local tgt = apropos_follow_path(path)
if ("function" == type(tgt)) then
local _660_0 = (compiler.metadata):get(tgt, "fnl/docstring")
if (nil ~= _660_0) then
local docstr = _660_0
val_19_ = (docstr:match(pattern) and path)
else
val_19_ = nil
end
else
val_19_ = nil
end
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
return tbl_17_
end
commands["apropos-doc"] = function(_env, read, on_values, on_error, _scope)
local function _664_(_241)
return on_values(apropos_doc(tostring(_241)))
end
return run_command(read, on_error, _664_)
end
do end (compiler.metadata):set(commands["apropos-doc"], "fnl/docstring", "Print all functions that match the pattern in their docs")
local function apropos_show_docs(on_values, pattern)
for _, path in ipairs(apropos(pattern)) do
local tgt = apropos_follow_path(path)
if (("function" == type(tgt)) and (compiler.metadata):get(tgt, "fnl/docstring")) then
on_values(specials.doc(tgt, path))
on_values()
end
end
return nil
end
commands["apropos-show-docs"] = function(_env, read, on_values, on_error)
local function _666_(_241)
return apropos_show_docs(on_values, tostring(_241))
end
return run_command(read, on_error, _666_)
end
do end (compiler.metadata):set(commands["apropos-show-docs"], "fnl/docstring", "Print all documentations matching a pattern in function name")
local function resolve(identifier, _667_0, scope)
local _668_ = _667_0
local env = _668_
local ___replLocals___ = _668_["___replLocals___"]
local e = nil
local function _669_(_241, _242)
return (___replLocals___[scope.unmanglings[_242]] or env[_242])
end
e = setmetatable({}, {__index = _669_})
local function _670_(...)
local _671_0, _672_0 = ...
if ((_671_0 == true) and (nil ~= _672_0)) then
local code = _672_0
local function _673_(...)
local _674_0, _675_0 = ...
if ((_674_0 == true) and (nil ~= _675_0)) then
local val = _675_0
return val
else
local _ = _674_0
return nil
end
end
return _673_(pcall(specials["load-code"](code, e)))
else
local _ = _671_0
return nil
end
end
return _670_(pcall(compiler["compile-string"], tostring(identifier), {scope = scope}))
end
commands.find = function(env, read, on_values, on_error, scope)
local function _678_(_241)
local _679_0 = nil
do
local _680_0 = utils["sym?"](_241)
if (nil ~= _680_0) then
local _681_0 = resolve(_680_0, env, scope)
if (nil ~= _681_0) then
_679_0 = debug.getinfo(_681_0)
else
_679_0 = _681_0
end
else
_679_0 = _680_0
end
end
if ((_G.type(_679_0) == "table") and (nil ~= _679_0.linedefined) and (nil ~= _679_0.short_src) and (nil ~= _679_0.source) and (_679_0.what == "Lua")) then
local line = _679_0.linedefined
local src = _679_0.short_src
local source = _679_0.source
local fnlsrc = nil
do
local _684_0 = compiler.sourcemap
if (nil ~= _684_0) then
_684_0 = _684_0[source]
end
if (nil ~= _684_0) then
_684_0 = _684_0[line]
end
if (nil ~= _684_0) then
_684_0 = _684_0[2]
end
fnlsrc = _684_0
end
return on_values({string.format("%s:%s", src, (fnlsrc or line))})
elseif (_679_0 == nil) then
return on_error("Repl", "Unknown value")
else
local _ = _679_0
return on_error("Repl", "No source info")
end
end
return run_command(read, on_error, _678_)
end
do end (compiler.metadata):set(commands.find, "fnl/docstring", "Print the filename and line number for a given function")
commands.doc = function(env, read, on_values, on_error, scope)
local function _689_(_241)
local name = tostring(_241)
local path = (utils["multi-sym?"](name) or {name})
local ok_3f, target = nil, nil
local function _690_()
return (utils["get-in"](scope.specials, path) or utils["get-in"](scope.macros, path) or resolve(name, env, scope))
end
ok_3f, target = pcall(_690_)
if ok_3f then
return on_values({specials.doc(target, name)})
else
return on_error("Repl", ("Could not find " .. name .. " for docs."))
end
end
return run_command(read, on_error, _689_)
end
do end (compiler.metadata):set(commands.doc, "fnl/docstring", "Print the docstring and arglist for a function, macro, or special form.")
commands.compile = function(env, read, on_values, on_error, scope)
local function _692_(_241)
local allowedGlobals = specials["current-global-names"](env)
local ok_3f, result = pcall(compiler.compile, _241, {allowedGlobals = allowedGlobals, env = env, scope = scope})
if ok_3f then
return on_values({result})
else
return on_error("Repl", ("Error compiling expression: " .. result))
end
end
return run_command(read, on_error, _692_)
end
do end (compiler.metadata):set(commands.compile, "fnl/docstring", "compiles the expression into lua and prints the result.")
local function load_plugin_commands(plugins)
for i = #(plugins or {}), 1, -1 do
for name, f in pairs(plugins[i]) do
local _694_0 = name:match("^repl%-command%-(.*)")
if (nil ~= _694_0) then
local cmd_name = _694_0
commands[cmd_name] = f
end
end
end
return nil
end
local function run_command_loop(input, read, loop, env, on_values, on_error, scope, chars)
local command_name = input:match(",([^%s/]+)")
do
local _696_0 = commands[command_name]
if (nil ~= _696_0) then
local command = _696_0
command(env, read, on_values, on_error, scope, chars)
else
local _ = _696_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 try_readline_21(opts, ok, readline)
if ok then
if readline.set_readline_name then
readline.set_readline_name("fennel")
end
readline.set_options({histfile = "", keeplines = 1000})
opts.readChunk = function(parser_state)
local prompt = nil
if (0 < parser_state["stack-size"]) then
prompt = ".. "
else
prompt = ">> "
end
local str = readline.readline(prompt)
if str then
return (str .. "\n")
end
end
local completer0 = nil
opts.registerCompleter = function(repl_completer)
completer0 = repl_completer
return nil
end
local function repl_completer(text, from, to)
if completer0 then
readline.set_completion_append_character("")
return completer0(text:sub(from, to))
else
return {}
end
end
readline.set_complete_function(repl_completer)
return readline
end
end
local function should_use_readline_3f(opts)
return (("dumb" ~= os.getenv("TERM")) and not opts.readChunk and not opts.registerCompleter)
end
local function repl(_3foptions)
local old_root_options = utils.root.options
local _705_ = utils.copy(_3foptions)
local opts = _705_
local _3ffennelrc = _705_["fennelrc"]
local _ = nil
opts.fennelrc = nil
_ = nil
local readline = (should_use_readline_3f(opts) and try_readline_21(opts, pcall(require, "readline")))
local _0 = nil
if _3ffennelrc then
_0 = _3ffennelrc()
else
_0 = nil
end
local env = specials["wrap-env"]((opts.env or rawget(_G, "_ENV") or _G))
local callbacks = {env = env, onError = (opts.onError or default_on_error), onValues = (opts.onValues or default_on_values), pp = (opts.pp or view), readChunk = (opts.readChunk or default_read_chunk)}
local save_locals_3f = (opts.saveLocals ~= false)
local byte_stream, clear_stream = nil, nil
local function _707_(_241)
return callbacks.readChunk(_241)
end
byte_stream, clear_stream = parser.granulate(_707_)
local chars = {}
local read, reset = nil, nil
local function _708_(parser_state)
local b = byte_stream(parser_state)
if b then
table.insert(chars, string.char(b))
end
return b
end
read, reset = parser.parser(_708_)
env.___repl___ = callbacks
opts.env, opts.scope = env, compiler["make-scope"]()
opts.useMetadata = (opts.useMetadata ~= false)
if (opts.allowedGlobals == nil) then
opts.allowedGlobals = specials["current-global-names"](env)
end
if opts.registerCompleter then
local function _712_()
local _711_0 = opts.scope
local function _713_(...)
return completer(env, _711_0, ...)
end
return _713_
end
opts.registerCompleter(_712_())
end
load_plugin_commands(opts.plugins)
if save_locals_3f then
local function newindex(t, k, v)
if opts.scope.manglings[k] then
return rawset(t, k, v)
end
end
env.___replLocals___ = setmetatable({}, {__newindex = newindex})
end
local function print_values(...)
local vals = {...}
local out = {}
local pp = callbacks.pp
env._, env.__ = vals[1], vals
for i = 1, select("#", ...) do
table.insert(out, pp(vals[i]))
end
return callbacks.onValues(out)
end
local function loop()
for k in pairs(chars) do
chars[k] = nil
end
reset()
local ok, parser_not_eof_3f, x = pcall(read)
local src_string = table.concat(chars)
local readline_not_eof_3f = (not readline or (src_string ~= "(null)"))
local not_eof_3f = (readline_not_eof_3f and parser_not_eof_3f)
if not ok then
callbacks.onError("Parse", not_eof_3f)
clear_stream()
return loop()
elseif command_3f(src_string) then
return run_command_loop(src_string, read, loop, env, callbacks.onValues, callbacks.onError, opts.scope, chars)
else
if not_eof_3f then
do
local _717_0, _718_0 = nil, nil
local function _719_()
opts["source"] = src_string
return opts
end
_717_0, _718_0 = pcall(compiler.compile, x, _719_())
if ((_717_0 == false) and (nil ~= _718_0)) then
local msg = _718_0
clear_stream()
callbacks.onError("Compile", msg)
elseif ((_717_0 == true) and (nil ~= _718_0)) then
local src = _718_0
local src0 = nil
if save_locals_3f then
src0 = splice_save_locals(env, src, opts.scope)
else
src0 = src
end
local _721_0, _722_0 = pcall(specials["load-code"], src0, env)
if ((_721_0 == false) and (nil ~= _722_0)) then
local msg = _722_0
clear_stream()
callbacks.onError("Lua Compile", msg, src0)
elseif (true and (nil ~= _722_0)) then
local _1 = _721_0
local chunk = _722_0
local function _723_()
return print_values(chunk())
end
local function _724_(...)
return callbacks.onError("Runtime", ...)
end
xpcall(_723_, _724_)
end
end
end
utils.root.options = old_root_options
return loop()
end
end
end
loop()
if readline then
return readline.save_history()
end
end
return repl
end
package.preload["fennel.specials"] = package.preload["fennel.specials"] or function(...)
local utils = require("fennel.utils")
local view = require("fennel.view")
local parser = require("fennel.parser")
local compiler = require("fennel.compiler")
local unpack = (table.unpack or _G.unpack)
local SPECIALS = compiler.scopes.global.specials
local function wrap_env(env)
local function _416_(_, key)
if utils["string?"](key) then
return env[compiler["global-unmangling"](key)]
else
return env[key]
end
end
local function _418_(_, key, value)
if utils["string?"](key) then
env[compiler["global-unmangling"](key)] = value
return nil
else
env[key] = value
return nil
end
end
local function _420_()
local function putenv(k, v)
local _421_
if utils["string?"](k) then
_421_ = compiler["global-unmangling"](k)
else
_421_ = k
end
return _421_, v
end
return next, utils.kvmap(env, putenv), nil
end
return setmetatable({}, {__index = _416_, __newindex = _418_, __pairs = _420_})
end
local function current_global_names(_3fenv)
local mt = nil
do
local _423_0 = getmetatable(_3fenv)
if ((_G.type(_423_0) == "table") and (nil ~= _423_0.__pairs)) then
local mtpairs = _423_0.__pairs
local tbl_14_ = {}
for k, v in mtpairs(_3fenv) do
local k_15_, v_16_ = k, v
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
mt = tbl_14_
elseif (_423_0 == nil) then
mt = (_3fenv or _G)
else
mt = nil
end
end
return (mt and utils.kvmap(mt, compiler["global-unmangling"]))
end
local function load_code(code, _3fenv, _3ffilename)
local env = (_3fenv or rawget(_G, "_ENV") or _G)
local _426_0, _427_0 = rawget(_G, "setfenv"), rawget(_G, "loadstring")
if ((nil ~= _426_0) and (nil ~= _427_0)) then
local setfenv = _426_0
local loadstring = _427_0
local f = assert(loadstring(code, _3ffilename))
setfenv(f, env)
return f
else
local _ = _426_0
return assert(load(code, _3ffilename, "t", env))
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 _429_
if (0 < #arglist) then
_429_ = " "
else
_429_ = ""
end
return string.format("(%s%s%s)\n %s", name, _429_, 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, _3fstart)
local start = (_3fstart or 2)
local len = #ast
local sub_scope = compiler["make-scope"](scope)
for i = start, len do
compiler.compile1(ast[i], sub_scope, parent, {nval = 0})
end
return nil
end
SPECIALS["do"] = function(ast, scope, parent, opts, _3fstart, _3fchunk, _3fsub_scope, _3fpre_syms)
local start = (_3fstart or 2)
local sub_scope = (_3fsub_scope or compiler["make-scope"](scope))
local chunk = (_3fchunk or {})
local len = #ast
local retexprs = {returned = true}
local function compile_body(outer_target, outer_tail, outer_retexprs)
if (len < start) then
compiler.compile1(nil, sub_scope, chunk, {tail = outer_tail, target = outer_target})
else
for i = start, len do
local subopts = {nval = (((i ~= len) and 0) or opts.nval), tail = (((i == len) and outer_tail) or nil), target = (((i == len) and outer_target) or nil)}
local _ = utils["propagate-options"](opts, subopts)
local subexprs = compiler.compile1(ast[i], sub_scope, chunk, subopts)
if (i ~= len) then
compiler["keep-side-effects"](subexprs, parent, nil, ast[i])
end
end
end
compiler.emit(parent, chunk, ast)
compiler.emit(parent, "end", ast)
utils.hook("do", ast, sub_scope)
return (outer_retexprs or retexprs)
end
if (opts.target or (opts.nval == 0) or opts.tail) then
compiler.emit(parent, "do", ast)
return compile_body(opts.target, opts.tail)
elseif opts.nval then
local syms = {}
for i = 1, opts.nval do
local s = ((_3fpre_syms and _3fpre_syms[i]) or compiler.gensym(scope))
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)
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 __3estack(stack, tbl)
for k, v in pairs(tbl) do
table.insert(stack, k)
table.insert(stack, v)
end
return stack
end
local function literal_3f(val)
local res = true
if utils["list?"](val) then
res = false
elseif utils["table?"](val) then
local stack = __3estack({}, val)
for _, elt in ipairs(stack) do
if not res then break end
if utils["list?"](elt) then
res = false
elseif utils["table?"](elt) then
__3estack(stack, elt)
end
end
end
return res
end
local function compile_value(v)
local opts = {nval = 1, tail = false}
local scope = compiler["make-scope"]()
local chunk = {}
local _440_ = compiler.compile1(v, scope, chunk, opts)
local _441_ = _440_[1]
local v0 = _441_[1]
return v0
end
local function insert_meta(meta, k, v)
local view_opts = {["escape-newlines?"] = true, ["line-length"] = math.huge, ["one-line?"] = true}
compiler.assert((type(k) == "string"), ("expected string keys in metadata table, got: %s"):format(view(k, view_opts)))
compiler.assert(literal_3f(v), ("expected literal value in metadata table, got: %s %s"):format(view(k, view_opts), view(v, view_opts)))
table.insert(meta, view(k))
local function _442_()
if ("string" == type(v)) then
return view(v, view_opts)
else
return compile_value(v)
end
end
table.insert(meta, _442_())
return meta
end
local function insert_arglist(meta, arg_list)
local view_opts = {["escape-newlines?"] = true, ["line-length"] = math.huge, ["one-line?"] = true}
table.insert(meta, "\"fnl/arglist\"")
local function _443_(_241)
return view(view(_241, view_opts))
end
table.insert(meta, ("{" .. table.concat(utils.map(arg_list, _443_), ", ") .. "}"))
return meta
end
local function set_fn_metadata(f_metadata, parent, fn_name)
if utils.root.options.useMetadata then
local meta_fields = {}
for k, v in utils.stablepairs(f_metadata) do
if (k == "fnl/arglist") then
insert_arglist(meta_fields, v)
else
insert_meta(meta_fields, k, v)
end
end
local meta_str = ("require(\"%s\").metadata"):format((utils.root.options.moduleName or "fennel"))
return compiler.emit(parent, ("pcall(function() %s:setall(%s, %s) end)"):format(meta_str, fn_name, table.concat(meta_fields, ", ")))
end
end
local function get_fn_name(ast, scope, fn_name, multi)
if (fn_name and (fn_name[1] ~= "nil")) then
local _446_
if not multi then
_446_ = compiler["declare-local"](fn_name, {}, scope, ast)
else
_446_ = compiler["symbol-to-expression"](fn_name, scope)[1]
end
return _446_, not multi, 3
else
return nil, true, 2
end
end
local function compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, local_3f, arg_name_list, f_metadata)
for i = (index + 1), #ast do
compiler.compile1(ast[i], f_scope, f_chunk, {nval = (((i ~= #ast) and 0) or nil), tail = (i == #ast)})
end
local _449_
if local_3f then
_449_ = "local function %s(%s)"
else
_449_ = "%s = function(%s)"
end
compiler.emit(parent, string.format(_449_, fn_name, table.concat(arg_name_list, ", ")), ast)
compiler.emit(parent, f_chunk, ast)
compiler.emit(parent, "end", ast)
set_fn_metadata(f_metadata, parent, fn_name)
utils.hook("fn", ast, f_scope)
return utils.expr(fn_name, "sym")
end
local function compile_anonymous_fn(ast, f_scope, f_chunk, parent, index, arg_name_list, f_metadata, scope)
local fn_name = compiler.gensym(scope)
return compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, true, arg_name_list, f_metadata)
end
local function maybe_metadata(ast, pred, handler, mt, index)
local index_2a = (index + 1)
local index_2a_before_ast_end_3f = (index_2a < #ast)
local expr = ast[index_2a]
if (index_2a_before_ast_end_3f and pred(expr)) then
return handler(mt, expr), index_2a
else
return mt, index
end
end
local function get_function_metadata(ast, arg_list, index)
local function _452_(_241, _242)
local tbl_14_ = _241
for k, v in pairs(_242) do
local k_15_, v_16_ = k, v
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
return tbl_14_
end
local function _454_(_241, _242)
_241["fnl/docstring"] = _242
return _241
end
return maybe_metadata(ast, utils["kv-table?"], _452_, maybe_metadata(ast, utils["string?"], _454_, {["fnl/arglist"] = arg_list}, index))
end
SPECIALS.fn = function(ast, scope, parent)
local f_scope = nil
do
local _455_0 = compiler["make-scope"](scope)
_455_0["vararg"] = false
f_scope = _455_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 destructure_arg(arg)
local raw = utils.sym(compiler.gensym(scope))
local declared = compiler["declare-local"](raw, {}, f_scope, ast)
compiler.destructure(arg, raw, ast, f_scope, f_chunk, {declaration = true, nomulti = true, symtype = "arg"})
return declared
end
local function destructure_amp(i)
compiler.assert((i == (#arg_list - 1)), "expected rest argument before last parameter", arg_list[(i + 1)], arg_list)
f_scope.vararg = true
compiler.destructure(arg_list[#arg_list], {utils.varg()}, ast, f_scope, f_chunk, {declaration = true, nomulti = true, symtype = "arg"})
return "..."
end
local function get_arg_name(arg, i)
if f_scope.vararg then
return nil
elseif utils["varg?"](arg) then
compiler.assert((arg == arg_list[#arg_list]), "expected vararg as last parameter", ast)
f_scope.vararg = true
return "..."
elseif utils["sym?"](arg, "&") then
return destructure_amp(i)
elseif (utils["sym?"](arg) and (tostring(arg) ~= "nil") and not utils["multi-sym?"](tostring(arg))) then
return compiler["declare-local"](arg, {}, f_scope, ast)
elseif utils["table?"](arg) then
return destructure_arg(arg)
else
return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(arg)), ast[index])
end
end
local arg_name_list = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for i, a in ipairs(arg_list) do
local val_19_ = get_arg_name(a, i)
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
arg_name_list = tbl_17_
end
local f_metadata, index0 = get_function_metadata(ast, arg_list, index)
if fn_name then
return compile_named_fn(ast, f_scope, f_chunk, parent, index0, fn_name, local_3f, arg_name_list, f_metadata)
else
return compile_anonymous_fn(ast, f_scope, f_chunk, parent, index0, arg_name_list, f_metadata, scope)
end
end
doc_special("fn", {"name?", "args", "docstring?", "..."}, "Function syntax. May optionally include a name and docstring or a metadata table.\nIf a name is provided, the function will be bound in the current scope.\nWhen called with the wrong number of args, excess args will be discarded\nand lacking args will be nil, use lambda for arity-checked functions.", true)
SPECIALS.lua = function(ast, _, parent)
compiler.assert(((#ast == 2) or (#ast == 3)), "expected 1 or 2 arguments", ast)
local _460_
do
local _459_0 = utils["sym?"](ast[2])
if (nil ~= _459_0) then
_460_ = tostring(_459_0)
else
_460_ = _459_0
end
end
if ("nil" ~= _460_) then
table.insert(parent, {ast = ast, leaf = tostring(ast[2])})
end
local _464_
do
local _463_0 = utils["sym?"](ast[3])
if (nil ~= _463_0) then
_464_ = tostring(_463_0)
else
_464_ = _463_0
end
end
if ("nil" ~= _464_) then
return tostring(ast[3])
end
end
local function dot(ast, scope, parent)
compiler.assert((1 < #ast), "expected table argument", ast)
local len = #ast
local _467_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
local lhs = _467_[1]
if (len == 2) then
return tostring(lhs)
else
local indices = {}
for i = 3, len do
local index = ast[i]
if (utils["string?"](index) and utils["valid-lua-identifier?"](index)) then
table.insert(indices, ("." .. index))
else
local _468_ = compiler.compile1(index, scope, parent, {nval = 1})
local index0 = _468_[1]
table.insert(indices, ("[" .. tostring(index0) .. "]"))
end
end
if (not (utils["sym?"](ast[2]) or utils["list?"](ast[2])) or ("nil" == tostring(lhs))) then
return ("(" .. tostring(lhs) .. ")" .. table.concat(indices))
else
return (tostring(lhs) .. table.concat(indices))
end
end
end
SPECIALS["."] = dot
doc_special(".", {"tbl", "key1", "..."}, "Look up key1 in tbl table. If more args are provided, do a nested lookup.")
SPECIALS.global = function(ast, scope, parent)
compiler.assert((#ast == 3), "expected name and value", ast)
compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceglobal = true, nomulti = true, symtype = "global"})
return nil
end
doc_special("global", {"name", "val"}, "Set name as a global with val.")
SPECIALS.set = function(ast, scope, parent)
compiler.assert((#ast == 3), "expected name and value", ast)
compiler.destructure(ast[2], ast[3], ast, scope, parent, {noundef = true, symtype = "set"})
return nil
end
doc_special("set", {"name", "val"}, "Set a local variable to a new value. Only works on locals using var.")
local function set_forcibly_21_2a(ast, scope, parent)
compiler.assert((#ast == 3), "expected name and value", ast)
compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceset = true, symtype = "set"})
return nil
end
SPECIALS["set-forcibly!"] = set_forcibly_21_2a
local function local_2a(ast, scope, parent)
compiler.assert((#ast == 3), "expected name and value", ast)
compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, nomulti = true, symtype = "local"})
return nil
end
SPECIALS["local"] = local_2a
doc_special("local", {"name", "val"}, "Introduce new top-level immutable local.")
SPECIALS.var = function(ast, scope, parent)
compiler.assert((#ast == 3), "expected name and value", ast)
compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, isvar = true, nomulti = true, symtype = "var"})
return nil
end
doc_special("var", {"name", "val"}, "Introduce new mutable local.")
local function kv_3f(t)
local _472_
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for k in pairs(t) do
local val_19_ = nil
if ("number" ~= type(k)) then
val_19_ = k
else
val_19_ = nil
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
_472_ = tbl_17_
end
return _472_[1]
end
SPECIALS.let = function(ast, scope, parent, opts)
local bindings = ast[2]
local pre_syms = {}
compiler.assert((utils["table?"](bindings) and not kv_3f(bindings)), "expected binding sequence", bindings)
compiler.assert(((#bindings % 2) == 0), "expected even number of name/value bindings", ast[2])
compiler.assert((3 <= #ast), "expected body expression", ast[1])
for _ = 1, (opts.nval or 0) do
table.insert(pre_syms, compiler.gensym(scope))
end
local sub_scope = compiler["make-scope"](scope)
local sub_chunk = {}
for i = 1, #bindings, 2 do
compiler.destructure(bindings[i], bindings[(i + 1)], ast, sub_scope, sub_chunk, {declaration = true, nomulti = true, symtype = "let"})
end
return SPECIALS["do"](ast, scope, parent, opts, 3, sub_chunk, sub_scope, pre_syms)
end
doc_special("let", {"[name1 val1 ... nameN valN]", "..."}, "Introduces a new scope in which a given set of local bindings are used.", true)
local function get_prev_line(parent)
if ("table" == type(parent)) then
return get_prev_line((parent.leaf or parent[#parent]))
else
return (parent or "")
end
end
local function disambiguate_3f(rootstr, parent)
local function _477_()
local _476_0 = get_prev_line(parent)
if (nil ~= _476_0) then
local prev_line = _476_0
return prev_line:match("%)$")
end
end
return (rootstr:match("^{") or rootstr:match("^%(") or _477_())
end
SPECIALS.tset = function(ast, scope, parent)
compiler.assert((3 < #ast), "expected table, key, and value arguments", ast)
local root = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
local keys = {}
for i = 3, (#ast - 1) do
local _479_ = compiler.compile1(ast[i], scope, parent, {nval = 1})
local key = _479_[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 disambiguate_3f(rootstr, parent) then
fmtstr = "do end (%s)[%s] = %s"
else
fmtstr = "%s[%s] = %s"
end
return compiler.emit(parent, fmtstr:format(rootstr, table.concat(keys, "]["), tostring(value)), ast)
end
doc_special("tset", {"tbl", "key1", "...", "keyN", "val"}, "Set the value of a table field. Can take additional keys to set\nnested values, but all parents must contain an existing table.")
local function calculate_target(scope, opts)
if not (opts.tail or opts.target or opts.nval) then
return "iife", true, nil
elseif (opts.nval and (opts.nval ~= 0) and not opts.target) then
local accum = {}
local target_exprs = {}
for i = 1, opts.nval do
local s = compiler.gensym(scope)
accum[i] = s
target_exprs[i] = utils.expr(s, "sym")
end
return "target", opts.tail, table.concat(accum, ", "), target_exprs
else
return "none", opts.tail, opts.target
end
end
local function if_2a(ast, scope, parent, opts)
compiler.assert((2 < #ast), "expected condition and body", ast)
if ((1 == (#ast % 2)) and (ast[(#ast - 1)] == true)) then
table.remove(ast, (#ast - 1))
end
if (1 == (#ast % 2)) then
table.insert(ast, utils.sym("nil"))
end
if (#ast == 2) then
return SPECIALS["do"](utils.list(utils.sym("do"), ast[2]), scope, parent, opts)
else
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 else_branch = compile_body(#ast)
local s = compiler.gensym(scope)
local buffer = {}
local last_buffer = buffer
for i = 1, #branches do
local branch = branches[i]
local fstr = nil
if not branch.nested then
fstr = "if %s then"
else
fstr = "elseif %s then"
end
local cond = tostring(branch.cond)
local cond_line = fstr:format(cond)
if branch.nested then
compiler.emit(last_buffer, branch.condchunk, ast)
else
for _, v in ipairs(branch.condchunk) do
compiler.emit(last_buffer, v, ast)
end
end
compiler.emit(last_buffer, cond_line, ast)
compiler.emit(last_buffer, branch.chunk, ast)
if (i == #branches) then
compiler.emit(last_buffer, "else", ast)
compiler.emit(last_buffer, else_branch.chunk, ast)
compiler.emit(last_buffer, "end", ast)
elseif not branches[(i + 1)].nested then
local next_buffer = {}
compiler.emit(last_buffer, "else", ast)
compiler.emit(last_buffer, next_buffer, ast)
compiler.emit(last_buffer, "end", ast)
last_buffer = next_buffer
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
end
SPECIALS["if"] = if_2a
doc_special("if", {"cond1", "body1", "...", "condN", "bodyN"}, "Conditional form.\nTakes any number of condition/body pairs and evaluates the first body where\nthe condition evaluates to truthy. Similar to cond in other lisps.")
local function remove_until_condition(bindings)
local last_item = bindings[(#bindings - 1)]
if ((utils["sym?"](last_item) and (tostring(last_item) == "&until")) or ("until" == last_item)) then
table.remove(bindings, (#bindings - 1))
return table.remove(bindings)
end
end
local function compile_until(condition, scope, chunk)
if condition then
local _490_ = compiler.compile1(condition, scope, chunk, {nval = 1})
local condition_lua = _490_[1]
return compiler.emit(chunk, ("if %s then break end"):format(tostring(condition_lua)), utils.expr(condition, "expression"))
end
end
SPECIALS.each = function(ast, scope, parent)
compiler.assert((3 <= #ast), "expected body expression", ast[1])
compiler.assert(utils["table?"](ast[2]), "expected binding table", ast)
compiler.assert((2 <= #ast[2]), "expected binding and iterator", ast)
local binding = setmetatable(utils.copy(ast[2]), getmetatable(ast[2]))
local until_condition = remove_until_condition(binding)
local iter = table.remove(binding, #binding)
local destructures = {}
local new_manglings = {}
local sub_scope = compiler["make-scope"](scope)
local function destructure_binding(v)
compiler.assert(not utils["string?"](v), ("unexpected iterator clause " .. tostring(v)), binding)
if utils["sym?"](v) then
return compiler["declare-local"](v, {}, sub_scope, ast, new_manglings)
else
local raw = utils.sym(compiler.gensym(sub_scope))
destructures[raw] = v
return compiler["declare-local"](raw, {}, sub_scope, ast)
end
end
local bind_vars = utils.map(binding, destructure_binding)
local vals = compiler.compile1(iter, scope, parent)
local val_names = utils.map(vals, tostring)
local chunk = {}
compiler.emit(parent, ("for %s in %s do"):format(table.concat(bind_vars, ", "), table.concat(val_names, ", ")), ast)
for raw, args in utils.stablepairs(destructures) do
compiler.destructure(args, raw, ast, sub_scope, chunk, {declaration = true, nomulti = true, symtype = "each"})
end
compiler["apply-manglings"](sub_scope, new_manglings, ast)
compile_until(until_condition, sub_scope, chunk)
compile_do(ast, sub_scope, chunk, 3)
compiler.emit(parent, chunk, ast)
return compiler.emit(parent, "end", ast)
end
doc_special("each", {"[key value (iterator)]", "..."}, "Runs the body once for each set of values provided by the given iterator.\nMost commonly used with ipairs for sequential tables or pairs for undefined\norder, but can be used with any iterator.", true)
local function while_2a(ast, scope, parent)
local len1 = #parent
local condition = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
local len2 = #parent
local sub_chunk = {}
if (len1 ~= len2) then
for i = (len1 + 1), len2 do
table.insert(sub_chunk, parent[i])
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)
compiler.assert(utils["table?"](ast[2]), "expected binding table", ast)
local ranges = setmetatable(utils.copy(ast[2]), getmetatable(ast[2]))
local until_condition = remove_until_condition(ranges)
local binding_sym = table.remove(ranges, 1)
local sub_scope = compiler["make-scope"](scope)
local range_args = {}
local chunk = {}
compiler.assert(utils["sym?"](binding_sym), ("unable to bind %s %s"):format(type(binding_sym), tostring(binding_sym)), ast[2])
compiler.assert((3 <= #ast), "expected body expression", ast[1])
compiler.assert((#ranges <= 3), "unexpected arguments", ranges)
compiler.assert((1 < #ranges), "expected range to include start and stop", ranges)
for i = 1, math.min(#ranges, 3) do
range_args[i] = tostring(compiler.compile1(ranges[i], scope, parent, {nval = 1})[1])
end
compiler.emit(parent, ("for %s = %s do"):format(compiler["declare-local"](binding_sym, {}, sub_scope, ast), table.concat(range_args, ", ")), ast)
compile_until(until_condition, sub_scope, chunk)
compile_do(ast, sub_scope, chunk, 3)
compiler.emit(parent, chunk, ast)
return compiler.emit(parent, "end", ast)
end
SPECIALS["for"] = for_2a
doc_special("for", {"[index start stop step?]", "..."}, "Numeric loop construct.\nEvaluates body once for each value between start and stop (inclusive).", true)
local function native_method_call(ast, _scope, _parent, target, args)
local _494_ = ast
local _ = _494_[1]
local _0 = _494_[2]
local method_string = _494_[3]
local call_string = nil
if ((target.type == "literal") or (target.type == "varg") or (target.type == "expression")) then
call_string = "(%s):%s(%s)"
else
call_string = "%s:%s(%s)"
end
return utils.expr(string.format(call_string, tostring(target), method_string, table.concat(args, ", ")), "statement")
end
local function nonnative_method_call(ast, scope, parent, target, args)
local method_string = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1])
local args0 = {tostring(target), unpack(args)}
return utils.expr(string.format("%s[%s](%s)", tostring(target), method_string, table.concat(args0, ", ")), "statement")
end
local function double_eval_protected_method_call(ast, scope, parent, target, args)
local method_string = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1])
local call = "(function(tgt, m, ...) return tgt[m](tgt, ...) end)(%s, %s)"
table.insert(args, 1, method_string)
return utils.expr(string.format(call, tostring(target), table.concat(args, ", ")), "statement")
end
local function method_call(ast, scope, parent)
compiler.assert((2 < #ast), "expected at least 2 arguments", ast)
local _496_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
local target = _496_[1]
local args = {}
for i = 4, #ast do
local subexprs = nil
local _497_
if (i ~= #ast) then
_497_ = 1
else
_497_ = nil
end
subexprs = compiler.compile1(ast[i], scope, parent, {nval = _497_})
utils.map(subexprs, tostring, args)
end
if (utils["string?"](ast[3]) and utils["valid-lua-identifier?"](ast[3])) then
return native_method_call(ast, scope, parent, target, args)
elseif (target.type == "sym") then
return nonnative_method_call(ast, scope, parent, target, args)
else
return double_eval_protected_method_call(ast, scope, parent, target, args)
end
end
SPECIALS[":"] = method_call
doc_special(":", {"tbl", "method-name", "..."}, "Call the named method on tbl with the provided args.\nMethod name doesn't have to be known at compile-time; if it is, use\n(tbl:method-name ...) instead.")
SPECIALS.comment = function(ast, _, parent)
local c = nil
local _500_
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for i, elt in ipairs(ast) do
local val_19_ = nil
if (i ~= 1) then
val_19_ = view(ast[i], {["one-line?"] = true})
else
val_19_ = nil
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
_500_ = tbl_17_
end
c = table.concat(_500_, " "):gsub("%]%]", "]\\]")
return compiler.emit(parent, ("--[[ " .. c .. " ]]"), 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 _505_0 = compiler["make-scope"](scope)
_505_0["vararg"] = false
_505_0["hashfn"] = true
f_scope = _505_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(("$" .. i)), {}, f_scope, ast)
end
local function walker(idx, node, _3fparent_node)
if utils["sym?"](node, "$...") then
f_scope.vararg = true
if _3fparent_node then
_3fparent_node[idx] = utils.varg()
return nil
else
return utils.varg()
end
else
return ((utils["list?"](node) and (not _3fparent_node or not utils["sym?"](node[1], "hashfn"))) or utils["table?"](node))
end
end
utils["walk-tree"](ast, 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 = tostring(utils.varg())
else
arg_str = table.concat(args, ", ", 1, max_used)
end
compiler.emit(parent, string.format("local function %s(%s)", name, arg_str), ast)
compiler.emit(parent, f_chunk, ast)
compiler.emit(parent, "end", ast)
return utils.expr(name, "sym")
end
doc_special("hashfn", {"..."}, "Function literal shorthand; args are either $... OR $1, $2, etc.")
local function maybe_short_circuit_protect(ast, i, name, _510_0)
local _511_ = _510_0
local mac = _511_["macros"]
local call = (utils["list?"](ast) and tostring(ast[1]))
if ((("or" == name) or ("and" == name)) and (1 < i) and (mac[call] or ("set" == call) or ("tset" == call) or ("global" == call))) then
return utils.list(utils.sym("do"), ast)
else
return ast
end
end
local function arithmetic_special(name, zero_arity, unary_prefix, ast, scope, parent)
local len = #ast
local operands = {}
local padded_op = (" " .. name .. " ")
for i = 2, len do
local subast = maybe_short_circuit_protect(ast[i], i, name, scope)
local subexprs = compiler.compile1(subast, scope, parent)
if (i == len) then
utils.map(subexprs, tostring, operands)
else
table.insert(operands, tostring(subexprs[1]))
end
end
local _514_0 = #operands
if (_514_0 == 0) then
local _515_
do
compiler.assert(zero_arity, "Expected more than 0 arguments", ast)
_515_ = zero_arity
end
return utils.expr(_515_, "literal")
elseif (_514_0 == 1) then
if utils["varg?"](ast[2]) then
return compiler.assert(false, "tried to use vararg with operator", ast)
elseif unary_prefix then
return ("(" .. unary_prefix .. padded_op .. operands[1] .. ")")
else
return operands[1]
end
else
local _ = _514_0
return ("(" .. table.concat(operands, padded_op) .. ")")
end
end
local function define_arithmetic_special(name, zero_arity, unary_prefix, _3flua_name)
local _519_
do
local _518_0 = (_3flua_name or name)
local function _520_(...)
return arithmetic_special(_518_0, zero_arity, unary_prefix, ...)
end
_519_ = _520_
end
SPECIALS[name] = _519_
return doc_special(name, {"a", "b", "..."}, "Arithmetic operator; works the same as Lua but accepts more arguments.")
end
define_arithmetic_special("+", "0")
define_arithmetic_special("..", "''")
define_arithmetic_special("^")
define_arithmetic_special("-", nil, "")
define_arithmetic_special("*", "1")
define_arithmetic_special("%")
define_arithmetic_special("/", nil, "1")
define_arithmetic_special("//", nil, "1")
SPECIALS["or"] = function(ast, scope, parent)
return arithmetic_special("or", "false", nil, ast, scope, parent)
end
SPECIALS["and"] = function(ast, scope, parent)
return arithmetic_special("and", "true", nil, ast, scope, parent)
end
doc_special("and", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.")
doc_special("or", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.")
local function bitop_special(native_name, lib_name, zero_arity, unary_prefix, ast, scope, parent)
if (#ast == 1) then
return compiler.assert(zero_arity, "Expected more than 0 arguments.", ast)
else
local len = #ast
local operands = {}
local padded_native_name = (" " .. native_name .. " ")
local prefixed_lib_name = ("bit." .. lib_name)
for i = 2, len do
local subexprs = nil
local _521_
if (i ~= len) then
_521_ = 1
else
_521_ = nil
end
subexprs = compiler.compile1(ast[i], scope, parent, {nval = _521_})
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 _527_(...)
return bitop_special(native, name, zero_arity, unary_prefix, ...)
end
SPECIALS[name] = _527_
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.")
SPECIALS.bnot = function(ast, scope, parent)
compiler.assert((#ast == 2), "expected one argument", ast)
local _528_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
local value = _528_[1]
if utils.root.options.useBitLib then
return ("bit.bnot(" .. tostring(value) .. ")")
else
return ("~(" .. tostring(value) .. ")")
end
end
doc_special("bnot", {"x"}, "Bitwise negation; only works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
doc_special("..", {"a", "b", "..."}, "String concatenation operator; works the same as Lua but accepts more arguments.")
local function native_comparator(op, _530_0, scope, parent)
local _531_ = _530_0
local _ = _531_[1]
local lhs_ast = _531_[2]
local rhs_ast = _531_[3]
local _532_ = compiler.compile1(lhs_ast, scope, parent, {nval = 1})
local lhs = _532_[1]
local _533_ = compiler.compile1(rhs_ast, scope, parent, {nval = 1})
local rhs = _533_[1]
return string.format("(%s %s %s)", tostring(lhs), op, tostring(rhs))
end
local function idempotent_comparator(op, chain_op, ast, scope, parent)
local vals = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for i = 2, #ast do
local val_19_ = tostring(compiler.compile1(ast[i], scope, parent, {nval = 1})[1])
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
vals = tbl_17_
end
local comparisons = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for i = 1, (#vals - 1) do
local val_19_ = string.format("(%s %s %s)", vals[i], op, vals[(i + 1)])
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
comparisons = tbl_17_
end
local chain = string.format(" %s ", (chain_op or "and"))
return ("(" .. table.concat(comparisons, chain) .. ")")
end
local function double_eval_protected_comparator(op, chain_op, ast, scope, parent)
local arglist = {}
local comparisons = {}
local vals = {}
local chain = string.format(" %s ", (chain_op or "and"))
for i = 2, #ast do
table.insert(arglist, tostring(compiler.gensym(scope)))
table.insert(vals, tostring(compiler.compile1(ast[i], scope, parent, {nval = 1})[1]))
end
do
local tbl_17_ = comparisons
local i_18_ = #tbl_17_
for i = 1, (#arglist - 1) do
local val_19_ = string.format("(%s %s %s)", arglist[i], op, arglist[(i + 1)])
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
end
return string.format("(function(%s) return %s end)(%s)", table.concat(arglist, ","), table.concat(comparisons, chain), table.concat(vals, ","))
end
local function define_comparator_special(name, _3flua_op, _3fchain_op)
do
local op = (_3flua_op or name)
local function opfn(ast, scope, parent)
compiler.assert((2 < #ast), "expected at least two arguments", ast)
if (3 == #ast) then
return native_comparator(op, ast, scope, parent)
elseif utils["every?"]({unpack(ast, 2)}, utils["idempotent-expr?"]) then
return idempotent_comparator(op, _3fchain_op, ast, scope, parent)
else
return double_eval_protected_comparator(op, _3fchain_op, ast, scope, parent)
end
end
SPECIALS[name] = opfn
end
return doc_special(name, {"a", "b", "..."}, "Comparison operator; works the same as Lua but accepts more arguments.")
end
define_comparator_special(">")
define_comparator_special("<")
define_comparator_special(">=")
define_comparator_special("<=")
define_comparator_special("=", "==")
define_comparator_special("not=", "~=", "or")
local function define_unary_special(op, _3frealop)
local function opfn(ast, scope, parent)
compiler.assert((#ast == 2), "expected one argument", ast)
local tail = compiler.compile1(ast[2], scope, parent, {nval = 1})
return ((_3frealop or op) .. tostring(tail[1]))
end
SPECIALS[op] = opfn
return nil
end
define_unary_special("not", "not ")
doc_special("not", {"x"}, "Logical operator; works the same as Lua.")
define_unary_special("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", ast)
local runtime, this_scope = true, scope
while this_scope do
this_scope = this_scope.parent
if (this_scope == compiler.scopes.compiler) then
runtime = false
end
end
return compiler["do-quote"](ast[2], scope, parent, runtime)
end
doc_special("quote", {"x"}, "Quasiquote the following form. Only works in macro/compiler scope.")
local macro_loaded = {}
local function safe_getmetatable(tbl)
local mt = getmetatable(tbl)
assert((mt ~= getmetatable("")), "Illegal metatable access!")
return mt
end
local safe_require = nil
local function safe_compiler_env()
local _540_
do
local _539_0 = rawget(_G, "utf8")
if (nil ~= _539_0) then
_540_ = utils.copy(_539_0)
else
_540_ = _539_0
end
end
return {_VERSION = _VERSION, assert = assert, bit = rawget(_G, "bit"), error = error, getmetatable = safe_getmetatable, ipairs = ipairs, math = utils.copy(math), next = next, pairs = utils.stablepairs, 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, utf8 = _540_, xpcall = xpcall}
end
local function combined_mt_pairs(env)
local combined = {}
local _542_ = getmetatable(env)
local __index = _542_["__index"]
if ("table" == type(__index)) then
for k, v in pairs(__index) do
combined[k] = v
end
end
for k, v in next, env, nil do
combined[k] = v
end
return next, combined, nil
end
local function make_compiler_env(ast, scope, parent, _3fopts)
local provided = nil
do
local _544_0 = (_3fopts or utils.root.options)
if ((_G.type(_544_0) == "table") and (_544_0["compiler-env"] == "strict")) then
provided = safe_compiler_env()
elseif ((_G.type(_544_0) == "table") and (nil ~= _544_0.compilerEnv)) then
local compilerEnv = _544_0.compilerEnv
provided = compilerEnv
elseif ((_G.type(_544_0) == "table") and (nil ~= _544_0["compiler-env"])) then
local compiler_env = _544_0["compiler-env"]
provided = compiler_env
else
local _ = _544_0
provided = safe_compiler_env()
end
end
local env = nil
local function _546_()
return compiler.scopes.macro
end
local function _547_(symbol)
compiler.assert(compiler.scopes.macro, "must call from macro", ast)
return compiler.scopes.macro.manglings[tostring(symbol)]
end
local function _548_(base)
return utils.sym(compiler.gensym((compiler.scopes.macro or scope), base))
end
local function _549_(form)
compiler.assert(compiler.scopes.macro, "must call from macro", ast)
return compiler.macroexpand(form, compiler.scopes.macro)
end
env = {["assert-compile"] = compiler.assert, ["ast-source"] = utils["ast-source"], ["comment?"] = utils["comment?"], ["get-scope"] = _546_, ["in-scope?"] = _547_, ["list?"] = utils["list?"], ["macro-loaded"] = macro_loaded, ["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(), comment = utils.comment, gensym = _548_, list = utils.list, macroexpand = _549_, metadata = compiler.metadata, sequence = utils.sequence, sym = utils.sym, unpack = unpack, version = utils.version, view = view}
env._G = env
return setmetatable(env, {__index = provided, __newindex = provided, __pairs = combined_mt_pairs})
end
local function _550_(...)
local tbl_17_ = {}
local i_18_ = #tbl_17_
for c in string.gmatch((package.config or ""), "([^\n]+)") do
local val_19_ = c
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
return tbl_17_
end
local _552_ = _550_(...)
local dirsep = _552_[1]
local pathsep = _552_[2]
local pathmark = _552_[3]
local pkg_config = {dirsep = (dirsep or "/"), pathmark = (pathmark or "?"), pathsep = (pathsep or ";")}
local function escapepat(str)
return string.gsub(str, "[^%w]", "%%%1")
end
local function search_module(modulename, _3fpathstring)
local pathsepesc = escapepat(pkg_config.pathsep)
local pattern = ("([^%s]*)%s"):format(pathsepesc, pathsepesc)
local no_dot_module = modulename:gsub("%.", pkg_config.dirsep)
local fullpath = ((_3fpathstring or utils["fennel-module"].path) .. pkg_config.pathsep)
local function try_path(path)
local filename = path:gsub(escapepat(pkg_config.pathmark), no_dot_module)
local filename2 = path:gsub(escapepat(pkg_config.pathmark), modulename)
local _553_0 = (io.open(filename) or io.open(filename2))
if (nil ~= _553_0) then
local file = _553_0
file:close()
return filename
else
local _ = _553_0
return nil, ("no file '" .. filename .. "'")
end
end
local function find_in_path(start, _3ftried_paths)
local _555_0 = fullpath:match(pattern, start)
if (nil ~= _555_0) then
local path = _555_0
local _556_0, _557_0 = try_path(path)
if (nil ~= _556_0) then
local filename = _556_0
return filename
elseif ((_556_0 == nil) and (nil ~= _557_0)) then
local error = _557_0
local function _559_()
local _558_0 = (_3ftried_paths or {})
table.insert(_558_0, error)
return _558_0
end
return find_in_path((start + #path + 1), _559_())
end
else
local _ = _555_0
local function _561_()
local tried_paths = table.concat((_3ftried_paths or {}), "\n\9")
if (_VERSION < "Lua 5.4") then
return ("\n\9" .. tried_paths)
else
return tried_paths
end
end
return nil, _561_()
end
end
return find_in_path(1)
end
local function make_searcher(_3foptions)
local function _564_(module_name)
local opts = utils.copy(utils.root.options)
for k, v in pairs((_3foptions or {})) do
opts[k] = v
end
opts["module-name"] = module_name
local _565_0, _566_0 = search_module(module_name)
if (nil ~= _565_0) then
local filename = _565_0
local function _567_(...)
return utils["fennel-module"].dofile(filename, opts, ...)
end
return _567_, filename
elseif ((_565_0 == nil) and (nil ~= _566_0)) then
local error = _566_0
return error
end
end
return _564_
end
local function dofile_with_searcher(fennel_macro_searcher, filename, opts, ...)
local searchers = (package.loaders or package.searchers or {})
local _ = table.insert(searchers, 1, fennel_macro_searcher)
local m = utils["fennel-module"].dofile(filename, opts, ...)
table.remove(searchers, 1)
return m
end
local function fennel_macro_searcher(module_name)
local opts = nil
do
local _569_0 = utils.copy(utils.root.options)
_569_0["module-name"] = module_name
_569_0["env"] = "_COMPILER"
_569_0["requireAsInclude"] = false
_569_0["allowedGlobals"] = nil
opts = _569_0
end
local _570_0 = search_module(module_name, utils["fennel-module"]["macro-path"])
if (nil ~= _570_0) then
local filename = _570_0
local _571_
if (opts["compiler-env"] == _G) then
local function _572_(...)
return dofile_with_searcher(fennel_macro_searcher, filename, opts, ...)
end
_571_ = _572_
else
local function _573_(...)
return utils["fennel-module"].dofile(filename, opts, ...)
end
_571_ = _573_
end
return _571_, filename
end
end
local function lua_macro_searcher(module_name)
local _576_0 = search_module(module_name, package.path)
if (nil ~= _576_0) then
local filename = _576_0
local code = nil
do
local f = io.open(filename)
local function close_handlers_10_(ok_11_, ...)
f:close()
if ok_11_ then
return ...
else
return error(..., 0)
end
end
local function _578_()
return assert(f:read("*a"))
end
code = close_handlers_10_(_G.xpcall(_578_, (package.loaded.fennel or debug).traceback))
end
local chunk = load_code(code, make_compiler_env(), filename)
return chunk, filename
end
end
local macro_searchers = {fennel_macro_searcher, lua_macro_searcher}
local function search_macro_module(modname, n)
local _580_0 = macro_searchers[n]
if (nil ~= _580_0) then
local f = _580_0
local _581_0, _582_0 = f(modname)
if ((nil ~= _581_0) and true) then
local loader = _581_0
local _3ffilename = _582_0
return loader, _3ffilename
else
local _ = _581_0
return search_macro_module(modname, (n + 1))
end
end
end
local function sandbox_fennel_module(modname)
if ((modname == "fennel.macros") or (package and package.loaded and ("table" == type(package.loaded[modname])) and (package.loaded[modname].metadata == compiler.metadata))) then
return {metadata = compiler.metadata, view = view}
end
end
local function _586_(modname)
local function _587_()
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 sandbox_fennel_module(modname) or _587_())
end
safe_require = _586_
local function add_macros(macros_2a, ast, scope)
compiler.assert(utils["table?"](macros_2a), "expected macros to be table", ast)
for k, v in pairs(macros_2a) do
compiler.assert((type(v) == "function"), "expected each macro to be function", ast)
compiler["check-binding-valid"](utils.sym(k), scope, ast, {["macro?"] = true})
scope.macros[k] = v
end
return nil
end
local function resolve_module_name(_588_0, _scope, _parent, opts)
local _589_ = _588_0
local second = _589_[2]
local filename = _589_["filename"]
local filename0 = (filename or (utils["table?"](second) and second.filename))
local module_name = utils.root.options["module-name"]
local modexpr = compiler.compile(second, opts)
local modname_chunk = load_code(modexpr)
return modname_chunk(module_name, filename0)
end
SPECIALS["require-macros"] = function(ast, scope, parent, _3freal_ast)
compiler.assert((#ast == 2), "Expected one module name argument", (_3freal_ast or ast))
local modname = resolve_module_name(ast, scope, parent, {})
compiler.assert(utils["string?"](modname), "module name must compile to string", (_3freal_ast or ast))
if not macro_loaded[modname] then
local loader, filename = search_macro_module(modname, 1)
compiler.assert(loader, (modname .. " module not found."), ast)
macro_loaded[modname] = compiler.assert(utils["table?"](loader(modname, filename)), "expected macros to be table", (_3freal_ast or ast))
end
if ("import-macros" == tostring(ast[1])) then
return macro_loaded[modname]
else
return add_macros(macro_loaded[modname], ast, scope)
end
end
doc_special("require-macros", {"macro-module-name"}, "Load given module and use its contents as macro definitions in current scope.\nMacro module should return a table of macro functions with string keys.\nConsider using import-macros instead as it is more flexible.")
local function emit_included_fennel(src, path, opts, sub_chunk)
local subscope = compiler["make-scope"](utils.root.scope.parent)
local forms = {}
if utils.root.options.requireAsInclude then
subscope.specials.require = compiler["require-include"]
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_10_(ok_11_, ...)
f:close()
if ok_11_ then
return ...
else
return error(..., 0)
end
end
local function _595_()
return assert(f:read("*all")):gsub("[\13\n]*$", "")
end
src = close_handlers_10_(_G.xpcall(_595_, (package.loaded.fennel or debug).traceback))
end
local ret = utils.expr(("require(\"" .. mod .. "\")"), "statement")
local target = ("package.preload[%q]"):format(mod)
local preload_str = (target .. " = " .. target .. " or function(...)")
local temp_chunk, sub_chunk = {}, {}
compiler.emit(temp_chunk, preload_str, ast)
compiler.emit(temp_chunk, sub_chunk)
compiler.emit(temp_chunk, "end", ast)
for _, v in ipairs(temp_chunk) do
table.insert(utils.root.chunk, v)
end
if fennel_3f then
emit_included_fennel(src, path, opts, sub_chunk)
else
compiler.emit(sub_chunk, src, ast)
end
utils.root.scope.includes[mod] = ret
return ret
end
local function include_circular_fallback(mod, modexpr, fallback, ast)
if (utils.root.scope.includes[mod] == "fnl/loading") then
compiler.assert(fallback, "circular include detected", ast)
return fallback(modexpr)
end
end
SPECIALS.include = function(ast, scope, parent, opts)
compiler.assert((#ast == 2), "expected one argument", ast)
local modexpr = nil
do
local _598_0, _599_0 = pcall(resolve_module_name, ast, scope, parent, opts)
if ((_598_0 == true) and (nil ~= _599_0)) then
local modname = _599_0
modexpr = utils.expr(string.format("%q", modname), "literal")
else
local _ = _598_0
modexpr = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
end
end
if ((modexpr.type ~= "literal") or ((modexpr[1]):byte() ~= 34)) then
if opts.fallback then
return opts.fallback(modexpr)
else
return compiler.assert(false, "module name must be string literal", ast)
end
else
local mod = load_code(("return " .. modexpr[1]))()
local oldmod = utils.root.options["module-name"]
local _ = nil
utils.root.options["module-name"] = mod
_ = nil
local res = nil
local function _603_()
local _602_0 = search_module(mod)
if (nil ~= _602_0) then
local fennel_path = _602_0
return include_path(ast, opts, fennel_path, mod, true)
else
local _0 = _602_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
res = ((utils["member?"](mod, (utils.root.options.skipInclude or {})) and opts.fallback(modexpr, true)) or include_circular_fallback(mod, modexpr, opts.fallback, ast) or utils.root.scope.includes[mod] or _603_())
utils.root.options["module-name"] = oldmod
return res
end
end
doc_special("include", {"module-name-literal"}, "Like require but load the target module during compilation and embed it in the\nLua output. The module must be a string literal and resolvable at compile time.")
local function eval_compiler_2a(ast, scope, parent)
local env = make_compiler_env(ast, scope, parent)
local opts = utils.copy(utils.root.options)
opts.scope = compiler["make-scope"](compiler.scopes.compiler)
opts.allowedGlobals = current_global_names(env)
return assert(load_code(compiler.compile(ast, opts), wrap_env(env)))(opts["module-name"], ast.filename)
end
SPECIALS.macros = function(ast, scope, parent)
compiler.assert((#ast == 2), "Expected one table argument", ast)
local macro_tbl = eval_compiler_2a(ast[2], scope, parent)
compiler.assert(utils["table?"](macro_tbl), "Expected one table argument", ast)
return add_macros(macro_tbl, ast, scope)
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)
SPECIALS.unquote = function(ast)
return compiler.assert(false, "tried to use unquote outside quote", ast)
end
doc_special("unquote", {"..."}, "Evaluate the argument even if it's in a quoted form.")
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(_3fparent)
local parent = (_3fparent or scopes.global)
local _261_
if parent then
_261_ = ((parent.depth or 0) + 1)
else
_261_ = 0
end
return {["gensym-base"] = setmetatable({}, {__index = (parent and parent["gensym-base"])}), autogensyms = setmetatable({}, {__index = (parent and parent.autogensyms)}), depth = _261_, gensyms = setmetatable({}, {__index = (parent and parent.gensyms)}), hashfn = (parent and parent.hashfn), includes = setmetatable({}, {__index = (parent and parent.includes)}), macros = setmetatable({}, {__index = (parent and parent.macros)}), manglings = setmetatable({}, {__index = (parent and parent.manglings)}), parent = parent, refedglobals = {}, specials = setmetatable({}, {__index = (parent and parent.specials)}), symmeta = setmetatable({}, {__index = (parent and parent.symmeta)}), unmanglings = setmetatable({}, {__index = (parent and parent.unmanglings)}), vararg = (parent and parent.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 col = ((m and m.col) or ast_tbl.col or "?")
local target = tostring((utils["sym?"](ast_tbl[1]) or ast_tbl[1] or "()"))
return string.format("%s:%s:%s Compile error in '%s': %s", filename, line, col, target, msg)
end
local function assert_compile(condition, msg, ast, _3ffallback_ast)
if not condition then
local _264_ = (utils.root.options or {})
local error_pinpoint = _264_["error-pinpoint"]
local source = _264_["source"]
local unfriendly = _264_["unfriendly"]
local ast0 = nil
if next(utils["ast-source"](ast)) then
ast0 = ast
else
ast0 = (_3ffallback_ast or {})
end
if (nil == utils.hook("assert-compile", condition, msg, ast0, utils.root.reset)) then
utils.root.reset()
if unfriendly then
error(assert_msg(ast0, msg), 0)
else
friend["assert-compile"](condition, msg, ast0, source, {["error-pinpoint"] = error_pinpoint})
end
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 _269_(_241)
return ("\\" .. _241:byte())
end
return string.gsub(string.gsub(string.format("%q", str), ".", serialize_subst), "[\128-\255]", _269_)
end
local function global_mangling(str)
if utils["valid-lua-identifier?"](str) then
return str
else
local function _270_(_241)
return string.format("_%02x", _241:byte())
end
return ("__fnl_global__" .. str:gsub("[^%w]", _270_))
end
end
local function global_unmangling(identifier)
local _272_0 = string.match(identifier, "^__fnl_global__(.*)$")
if (nil ~= _272_0) then
local rest = _272_0
local _273_0 = nil
local function _274_(_241)
return string.char(tonumber(_241:sub(2), 16))
end
_273_0 = string.gsub(rest, "_[%da-f][%da-f]", _274_)
return _273_0
else
local _ = _272_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] then
return unique_mangling(original, (original .. append), scope, (append + 1))
else
return mangling
end
end
local function local_mangling(str, scope, ast, _3ftemp_manglings)
assert_compile(not utils["multi-sym?"](str), ("unexpected multi symbol " .. str), ast)
local raw = nil
if (utils["lua-keywords"][str] or str:match("^%d")) then
raw = ("_" .. str)
else
raw = str
end
local mangling = nil
local function _278_(_241)
return string.format("_%02x", _241:byte())
end
mangling = string.gsub(string.gsub(raw, "-", "_"), "[^%w_]", _278_)
local unique = unique_mangling(mangling, mangling, scope, 0)
scope.unmanglings[unique] = (scope["gensym-base"][str] or str)
do
local manglings = (_3ftemp_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 next_append()
utils.root.scope["gensym-append"] = ((utils.root.scope["gensym-append"] or 0) + 1)
return ("_" .. utils.root.scope["gensym-append"] .. "_")
end
local function gensym(scope, _3fbase, _3fsuffix)
local mangling = ((_3fbase or "") .. next_append() .. (_3fsuffix or ""))
while scope.unmanglings[mangling] do
mangling = ((_3fbase or "") .. next_append() .. (_3fsuffix or ""))
end
if (_3fbase and (0 < #_3fbase)) then
scope["gensym-base"][mangling] = _3fbase
end
scope.gensyms[mangling] = true
return mangling
end
local function combine_auto_gensym(parts, first)
parts[1] = first
local last = table.remove(parts)
local last2 = table.remove(parts)
local last_joiner = ((parts["multi-sym-method-call"] and ":") or ".")
table.insert(parts, (last2 .. last_joiner .. last))
return table.concat(parts, ".")
end
local function autogensym(base, scope)
local _282_0 = utils["multi-sym?"](base)
if (nil ~= _282_0) then
local parts = _282_0
return combine_auto_gensym(parts, autogensym(parts[1], scope))
else
local _ = _282_0
local function _283_()
local mangling = gensym(scope, base:sub(1, ( - 2)), "auto")
scope.autogensyms[base] = mangling
return mangling
end
return (scope.autogensyms[base] or _283_())
end
end
local function check_binding_valid(symbol, scope, ast, _3fopts)
local name = tostring(symbol)
local macro_3f = nil
do
local _285_0 = _3fopts
if (nil ~= _285_0) then
_285_0 = _285_0["macro?"]
end
macro_3f = _285_0
end
assert_compile(not name:find("&"), "invalid character: &", symbol)
assert_compile(not name:find("^%."), "invalid character: .", symbol)
assert_compile(not (scope.specials[name] or (not macro_3f and scope.macros[name])), ("local %s was overshadowed by a special form or macro"):format(name), ast)
return assert_compile(not utils["quoted?"](symbol), string.format("macro tried to bind %s without gensym", name), symbol)
end
local function declare_local(symbol, meta, scope, ast, _3ftemp_manglings)
check_binding_valid(symbol, scope, ast)
local name = tostring(symbol)
assert_compile(not utils["multi-sym?"](name), ("unexpected multi symbol " .. name), ast)
scope.symmeta[name] = meta
return local_mangling(name, scope, ast, _3ftemp_manglings)
end
local function hashfn_arg_name(name, multi_sym_parts, scope)
if not scope.hashfn then
return nil
elseif (name == "$") then
return "$1"
elseif multi_sym_parts then
if (multi_sym_parts and (multi_sym_parts[1] == "$")) then
multi_sym_parts[1] = "$1"
end
return table.concat(multi_sym_parts, ".")
end
end
local function symbol_to_expression(symbol, scope, _3freference_3f)
utils.hook("symbol-to-expression", symbol, scope, _3freference_3f)
local name = symbol[1]
local multi_sym_parts = utils["multi-sym?"](name)
local name0 = (hashfn_arg_name(name, multi_sym_parts, scope) or name)
local parts = (multi_sym_parts or {name0})
local etype = (((1 < #parts) and "expression") or "sym")
local local_3f = scope.manglings[parts[1]]
if (local_3f and scope.symmeta[parts[1]]) then
scope.symmeta[parts[1]]["used"] = true
end
assert_compile(not scope.macros[parts[1]], "tried to reference a macro without calling it", symbol)
assert_compile((not scope.specials[parts[1]] or ("require" == parts[1])), "tried to reference a special form without calling it", symbol)
assert_compile((not _3freference_3f or local_3f or ("_ENV" == parts[1]) or global_allowed_3f(parts[1])), ("unknown identifier: " .. tostring(parts[1])), symbol)
if (allowed_globals and not local_3f and scope.parent) then
scope.parent.refedglobals[parts[1]] = true
end
return utils.expr(combine_parts(parts, scope), etype)
end
local function emit(chunk, out, _3fast)
if (type(out) == "table") then
return table.insert(chunk, out)
else
return table.insert(chunk, {ast = _3fast, leaf = out})
end
end
local function peephole(chunk)
if chunk.leaf then
return chunk
elseif ((3 <= #chunk) and (chunk[(#chunk - 2)].leaf == "do") and not chunk[(#chunk - 1)].leaf and (chunk[#chunk].leaf == "end")) then
local kid = peephole(chunk[(#chunk - 1)])
local new_chunk = {ast = chunk.ast}
for i = 1, (#chunk - 3) do
table.insert(new_chunk, peephole(chunk[i]))
end
for i = 1, #kid do
table.insert(new_chunk, kid[i])
end
return new_chunk
else
return utils.map(chunk, peephole)
end
end
local function flatten_chunk_correlated(main_chunk, options)
local function flatten(chunk, out, last_line, file)
local last_line0 = last_line
if chunk.leaf then
out[last_line0] = ((out[last_line0] or "") .. " " .. chunk.leaf)
else
for _, subchunk in ipairs(chunk) do
if (subchunk.leaf or (0 < #subchunk)) then
local source = utils["ast-source"](subchunk.ast)
if (file == source.filename) then
last_line0 = math.max(last_line0, (source.line or 0))
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(file_sourcemap, chunk, tab, depth)
if chunk.leaf then
local _297_ = utils["ast-source"](chunk.ast)
local filename = _297_["filename"]
local line = _297_["line"]
table.insert(file_sourcemap, {filename, line})
return chunk.leaf
else
local tab0 = nil
do
local _298_0 = tab
if (_298_0 == true) then
tab0 = " "
elseif (_298_0 == false) then
tab0 = ""
elseif (_298_0 == tab) then
tab0 = tab
elseif (_298_0 == nil) then
tab0 = ""
else
tab0 = nil
end
end
local function parter(c)
if (c.leaf or (0 < #c)) then
local sub = flatten_chunk(file_sourcemap, c, tab0, (depth + 1))
if (0 < depth) then
return (tab0 .. sub:gsub("\n", ("\n" .. tab0)))
else
return sub
end
end
end
return table.concat(utils.map(chunk, parter), "\n")
end
end
local sourcemap = {}
local function make_short_src(source)
local source0 = source:gsub("\n", " ")
if (#source0 <= 49) then
return ("[fennel \"" .. source0 .. "\"]")
else
return ("[fennel \"" .. source0:sub(1, 46) .. "...\"]")
end
end
local function flatten(chunk, options)
local chunk0 = peephole(chunk)
if options.correlate then
return flatten_chunk_correlated(chunk0, options), {}
else
local file_sourcemap = {}
local src = flatten_chunk(file_sourcemap, chunk0, options.indent, 0)
file_sourcemap.short_src = (options.filename or make_short_src((options.source or src)))
if options.filename then
file_sourcemap.key = ("@" .. options.filename)
else
file_sourcemap.key = src
end
sourcemap[file_sourcemap.key] = file_sourcemap
return src, file_sourcemap
end
end
local function make_metadata()
local function _306_(self, tgt, _3fkey)
if self[tgt] then
if (nil ~= _3fkey) then
return self[tgt][_3fkey]
else
return self[tgt]
end
end
end
local function _309_(self, tgt, key, value)
self[tgt] = (self[tgt] or {})
self[tgt][key] = value
return tgt
end
local function _310_(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 = _306_, set = _309_, setall = _310_}, __mode = "k"})
end
local function exprs1(exprs)
return table.concat(utils.map(exprs, tostring), ", ")
end
local function keep_side_effects(exprs, chunk, start, ast)
local start0 = (start or 1)
for j = start0, #exprs do
local se = exprs[j]
if ((se.type == "expression") and (se[1] ~= "nil")) then
emit(chunk, string.format("do local _ = %s end", tostring(se)), ast)
elseif (se.type == "statement") then
local code = tostring(se)
local disambiguated = 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 (n < len) then
keep_side_effects(exprs, parent, (n + 1), ast)
for i = (n + 1), len do
exprs[i] = nil
end
else
for i = (#exprs + 1), n do
exprs[i] = utils.expr("nil", "literal")
end
end
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 _318_()
if (result == "") then
return "nil"
else
return result
end
end
emit(parent, string.format("%s = %s", opts.target, _318_()), ast)
end
if (opts.tail or opts.target) then
return {returned = true}
else
exprs["returned"] = true
return exprs
end
end
local function find_macro(ast, scope)
local macro_2a = nil
do
local _321_0 = utils["sym?"](ast[1])
if (_321_0 ~= nil) then
local _322_0 = tostring(_321_0)
if (_322_0 ~= nil) then
macro_2a = scope.macros[_322_0]
else
macro_2a = _322_0
end
else
macro_2a = _321_0
end
end
local multi_sym_parts = utils["multi-sym?"](ast[1])
if (not macro_2a and multi_sym_parts) then
local nested_macro = utils["get-in"](scope.macros, multi_sym_parts)
assert_compile((not scope.macros[multi_sym_parts[1]] or (type(nested_macro) == "function")), "macro not found in imported macro module", ast)
return nested_macro
else
return macro_2a
end
end
local function propagate_trace_info(_326_0, _index, node)
local _327_ = _326_0
local byteend = _327_["byteend"]
local bytestart = _327_["bytestart"]
local filename = _327_["filename"]
local line = _327_["line"]
do
local src = utils["ast-source"](node)
if (("table" == type(node)) and (filename ~= src.filename)) then
src.filename, src.line, src["from-macro?"] = filename, line, true
src.bytestart, src.byteend = bytestart, byteend
end
end
return ("table" == type(node))
end
local function quote_literal_nils(index, node, parent)
if (parent and utils["list?"](parent)) then
for i = 1, utils.maxn(parent) do
local _329_0 = parent[i]
if (_329_0 == nil) then
parent[i] = utils.sym("nil")
end
end
end
return index, node, parent
end
local function comp(f, g)
local function _332_(...)
return f(g(...))
end
return _332_
end
local function built_in_3f(m)
local found_3f = false
for _, f in pairs(scopes.global.macros) do
if found_3f then break end
found_3f = (f == m)
end
return found_3f
end
local function macroexpand_2a(ast, scope, _3fonce)
local _333_0 = nil
if utils["list?"](ast) then
_333_0 = find_macro(ast, scope)
else
_333_0 = nil
end
if (_333_0 == false) then
return ast
elseif (nil ~= _333_0) then
local macro_2a = _333_0
local old_scope = scopes.macro
local _ = nil
scopes.macro = scope
_ = nil
local ok, transformed = nil, nil
local function _335_()
return macro_2a(unpack(ast, 2))
end
local function _336_()
if built_in_3f(macro_2a) then
return tostring
else
return debug.traceback
end
end
ok, transformed = xpcall(_335_, _336_())
local function _337_(...)
return propagate_trace_info(ast, ...)
end
utils["walk-tree"](transformed, comp(_337_, quote_literal_nils))
scopes.macro = old_scope
assert_compile(ok, transformed, ast)
if (_3fonce or not transformed) then
return transformed
else
return macroexpand_2a(transformed, scope)
end
else
local _ = _333_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 ("table" ~= type(exprs)) 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((utils["sym?"](ast[1]) or utils["list?"](ast[1]) or ("string" == type(ast[1]))), ("cannot call literal value " .. tostring(ast[1])), ast)
for i = 2, len do
local subexprs = nil
local _343_
if (i ~= len) then
_343_ = 1
else
_343_ = nil
end
subexprs = compile1(ast[i], scope, parent, {nval = _343_})
table.insert(fargs, subexprs[1])
if (i == len) then
for j = 2, #subexprs do
table.insert(fargs, subexprs[j])
end
else
keep_side_effects(subexprs, parent, 2, ast[i])
end
end
local pat = 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[tostring(first)])
assert_compile((0 < len), "expected a function, macro, or special to call", ast)
if special then
return compile_special(ast, scope, parent, opts, special)
elseif (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]) then
local table_with_method = table.concat({unpack(multi_sym_parts, 1, (#multi_sym_parts - 1))}, ".")
local method_to_call = multi_sym_parts[#multi_sym_parts]
local new_ast = utils.list(utils.sym(":", ast), utils.sym(table_with_method, ast), method_to_call, select(2, unpack(ast)))
return compile1(new_ast, scope, parent, opts)
else
return compile_function_call(ast, scope, parent, opts, compile1, len)
end
end
local function compile_varg(ast, scope, parent, opts)
local _348_
if scope.hashfn then
_348_ = "use $... in hashfn"
else
_348_ = "unexpected vararg"
end
assert_compile(scope.vararg, _348_, 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 _351_0 = string.gsub(tostring(n), ",", ".")
return _351_0
end
local function compile_scalar(ast, _scope, parent, opts)
local serialize = nil
do
local _352_0 = type(ast)
if (_352_0 == "nil") then
serialize = tostring
elseif (_352_0 == "boolean") then
serialize = tostring
elseif (_352_0 == "string") then
serialize = serialize_string
elseif (_352_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 function escape_key(k)
if ((type(k) == "string") and utils["valid-lua-identifier?"](k)) then
return k
else
local _354_ = compile1(k, scope, parent, {nval = 1})
local compiled = _354_[1]
return ("[" .. tostring(compiled) .. "]")
end
end
local keys = {}
local buffer = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for i, elem in ipairs(ast) do
local val_19_ = nil
do
local nval = ((nil ~= ast[(i + 1)]) and 1)
keys[i] = true
val_19_ = exprs1(compile1(elem, scope, parent, {nval = nval}))
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
buffer = tbl_17_
end
do
local tbl_17_ = buffer
local i_18_ = #tbl_17_
for k, v in utils.stablepairs(ast) do
local val_19_ = nil
if not keys[k] then
local _357_ = compile1(ast[k], scope, parent, {nval = 1})
local v0 = _357_[1]
val_19_ = string.format("%s = %s", escape_key(k), tostring(v0))
else
val_19_ = nil
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
end
return handle_compile_opts({utils.expr(("{" .. table.concat(buffer, ", ") .. "}"), "expression")}, parent, opts, ast)
end
local function compile1(ast, scope, parent, _3fopts)
local opts = (_3fopts or {})
local ast0 = macroexpand_2a(ast, scope)
if utils["list?"](ast0) then
return compile_call(ast0, scope, parent, opts, compile1)
elseif utils["varg?"](ast0) then
return compile_varg(ast0, scope, parent, opts)
elseif utils["sym?"](ast0) then
return compile_sym(ast0, scope, parent, opts)
elseif (type(ast0) == "table") then
return compile_table(ast0, scope, parent, opts, compile1)
elseif ((type(ast0) == "nil") or (type(ast0) == "boolean") or (type(ast0) == "number") or (type(ast0) == "string")) then
return compile_scalar(ast0, scope, parent, opts)
else
return assert_compile(false, ("could not compile value of type " .. type(ast0)), ast0)
end
end
local function destructure(to, from, ast, scope, parent, opts)
local opts0 = (opts or {})
local _361_ = opts0
local declaration = _361_["declaration"]
local forceglobal = _361_["forceglobal"]
local forceset = _361_["forceset"]
local isvar = _361_["isvar"]
local symtype = _361_["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 _363_ = parts
local first = _363_[1]
local meta = scope.symmeta[first]
assert_compile(not raw:find(":"), "cannot set method sym", symbol)
if ((#parts == 1) and not forceset) then
assert_compile(not (forceglobal and meta), string.format("global %s conflicts with local", tostring(symbol)), symbol)
assert_compile(not (meta and not meta.var), ("expected var " .. raw), symbol)
end
assert_compile((meta or not opts0.noundef or (scope.hashfn and ("$" == first)) or global_allowed_3f(first)), ("expected local " .. first), symbol)
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 _368_(_241)
if scope.manglings[_241] then
return _241
else
return "nil"
end
end
inits = utils.map(lvalues, _368_)
local init = table.concat(inits, ", ")
local lvalue = table.concat(lvalues, ", ")
local plast = parent[#parent]
local plen = #parent
local ret = compile1(from, scope, parent, {target = lvalue})
if declaration then
for pi = plen, #parent do
if (parent[pi] == plast) then
plen = pi
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[tostring(left)] = {var = isvar}
return nil
end
end
local unpack_fn = "function (t, k, e)\n local mt = getmetatable(t)\n if 'table' == type(mt) and mt.__fennelrest then\n return mt.__fennelrest(t, k)\n elseif e then\n local rest = {}\n for k, v in pairs(t) do\n if not e[k] then rest[k] = v end\n end\n return rest\n else\n return {(table.unpack or unpack)(t, k)}\n end\n end"
local function destructure_kv_rest(s, v, left, excluded_keys, destructure1)
local exclude_str = nil
local _375_
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, k in ipairs(excluded_keys) do
local val_19_ = string.format("[%s] = true", serialize_string(k))
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
_375_ = tbl_17_
end
exclude_str = table.concat(_375_, ", ")
local subexpr = utils.expr(string.format(string.gsub(("(" .. unpack_fn .. ")(%s, %s, {%s})"), "\n%s*", " "), s, tostring(v), exclude_str), "expression")
return destructure1(v, {subexpr}, left)
end
local function destructure_rest(s, k, left, destructure1)
local unpack_str = ("(" .. unpack_fn .. ")(%s, %s)")
local formatted = string.format(string.gsub(unpack_str, "\n%s*", " "), s, k)
local subexpr = utils.expr(formatted, "expression")
assert_compile((utils["sequence?"](left) and (nil == left[(k + 2)])), "expected rest argument before last parameter", left)
return destructure1(left[(k + 1)], {subexpr}, left)
end
local function destructure_table(left, rightexprs, top_3f, destructure1)
local s = gensym(scope, symtype0)
local right = nil
do
local _377_0 = nil
if top_3f then
_377_0 = exprs1(compile1(from, scope, parent))
else
_377_0 = exprs1(rightexprs)
end
if (_377_0 == "") then
right = "nil"
elseif (nil ~= _377_0) then
local right0 = _377_0
right = right0
else
right = nil
end
end
local excluded_keys = {}
emit(parent, string.format("local %s = %s", s, right), left)
for k, v in utils.stablepairs(left) do
if not (("number" == type(k)) and tostring(left[(k - 1)]):find("^&")) then
if (utils["sym?"](k) and (tostring(k) == "&")) then
destructure_kv_rest(s, v, left, excluded_keys, destructure1)
elseif (utils["sym?"](v) and (tostring(v) == "&")) then
destructure_rest(s, k, left, destructure1)
elseif (utils["sym?"](k) and (tostring(k) == "&as")) then
destructure_sym(v, {utils.expr(tostring(s))}, left)
elseif (utils["sequence?"](left) and (tostring(v) == "&as")) then
local _, next_sym, trailing = select(k, unpack(left))
assert_compile((nil == trailing), "expected &as argument before last parameter", left)
destructure_sym(next_sym, {utils.expr(tostring(s))}, left)
else
local key = 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")
if (type(k) == "string") then
table.insert(excluded_keys, k)
end
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(left[1], "must provide at least one value", left)
assert_compile(top_3f, "can't nest multi-value destructuring", left)
compile_top_target(left_names)
if declaration then
for _, sym in ipairs(left) do
if utils["sym?"](sym) then
scope.symmeta[tostring(sym)] = {var = isvar}
end
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, opts0)
apply_manglings(scope, new_manglings, ast)
return ret
end
local function require_include(ast, scope, parent, opts)
opts.fallback = function(e, no_warn)
if (not no_warn and ("literal" == e.type)) then
utils.warn(("include module not found, falling back to require: %s"):format(tostring(e)))
end
return utils.expr(string.format("require(%s)", tostring(e)), "statement")
end
return scopes.global.specials.include(ast, scope, parent, opts)
end
local function opts_for_compile(options)
local opts = utils.copy(options)
opts.indent = (opts.indent or " ")
allowed_globals = opts.allowedGlobals
return opts
end
local function compile_asts(asts, options)
local old_globals = allowed_globals
local opts = opts_for_compile(options)
local scope = (opts.scope or make_scope(scopes.global))
local chunk = {}
if opts.requireAsInclude then
scope.specials.require = require_include
end
local _391_ = utils.root
_391_["set-reset"](_391_)
utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts
for i = 1, #asts do
local exprs = compile1(asts[i], scope, chunk, {nval = (((i < #asts) and 0) or nil), tail = (i == #asts)})
keep_side_effects(exprs, chunk, nil, asts[i])
if (i == #asts) then
utils.hook("chunk", asts[i], scope)
end
end
allowed_globals = old_globals
utils.root.reset()
return flatten(chunk, opts)
end
local function compile_stream(stream, opts)
local asts = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, ast in parser.parser(stream, opts.filename, opts) do
local val_19_ = ast
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
asts = tbl_17_
end
return compile_asts(asts, opts)
end
local function compile_string(str, _3fopts)
return compile_stream(parser["string-stream"](str, (_3fopts or {})), (_3fopts or {}))
end
local function compile(ast, _3fopts)
return compile_asts({ast}, _3fopts)
end
local function traceback_frame(info)
if ((info.what == "C") and info.name) then
return string.format(" [C]: in function '%s'", info.name)
elseif (info.what == "C") then
return " [C]: in ?"
else
local remap = sourcemap[info.source]
if (remap and remap[info.currentline]) then
if ((remap[info.currentline][1] or "unknown") ~= "unknown") then
info.short_src = sourcemap[("@" .. remap[info.currentline][1])].short_src
else
info.short_src = remap.short_src
end
info.currentline = (remap[info.currentline][2] or -1)
end
if (info.what == "Lua") then
local function _396_()
if info.name then
return ("'" .. info.name .. "'")
else
return "?"
end
end
return string.format(" %s:%d: in function %s", info.short_src, info.currentline, _396_())
elseif (info.short_src == "(tail call)") then
return " (tail call)"
else
return string.format(" %s:%d: in main chunk", info.short_src, info.currentline)
end
end
end
local function traceback(_3fmsg, _3fstart)
local msg = tostring((_3fmsg or ""))
if ((msg:find("^%g+:%d+:%d+ Compile error:.*") or msg:find("^%g+:%d+:%d+ Parse error:.*")) and not utils["debug-on?"]("trace")) then
return msg
else
local lines = {}
if (msg:find("^%g+:%d+:%d+ Compile error:") or msg:find("^%g+:%d+:%d+ Parse error:")) then
table.insert(lines, msg)
else
local newmsg = msg:gsub("^[^:]*:%d+:%s+", "runtime error: ")
table.insert(lines, newmsg)
end
table.insert(lines, "stack traceback:")
local done_3f, level = false, (_3fstart or 2)
while not done_3f do
do
local _400_0 = debug.getinfo(level, "Sln")
if (_400_0 == nil) then
done_3f = true
elseif (nil ~= _400_0) then
local info = _400_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 _403_(k, v)
if (type(k) == "number") then
return k, fv(v)
else
return fk(k), fv(v)
end
end
return _403_
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 = tostring(form)
assert_compile(not runtime_3f, "symbols may only be used at compile time", form)
if (symstr:find("#$") or symstr:find("#[:.]")) then
return string.format("sym('%s', {filename=%s, line=%s})", autogensym(symstr, scope), filename, (form.line or "nil"))
else
return string.format("sym('%s', {quoted=true, filename=%s, line=%s})", symstr, filename, (form.line or "nil"))
end
elseif (utils["list?"](form) and utils["sym?"](form[1]) and (tostring(form[1]) == "unquote")) then
local payload = form[2]
local res = unpack(compile1(payload, scope, parent))
return res[1]
elseif utils["list?"](form) then
local mapped = nil
local function _408_()
return nil
end
mapped = utils.kvmap(form, entry_transform(_408_, 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 _411_
if source then
_411_ = source.line
else
_411_ = "nil"
end
return string.format("setmetatable({%s}, {filename=%s, line=%s, sequence=%s})", mixed_concat(mapped, ", "), filename, _411_, "(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 _414_()
if source then
return source.line
else
return "nil"
end
end
return string.format("setmetatable({%s}, {filename=%s, line=%s})", mixed_concat(mapped, ", "), filename, _414_())
elseif (type(form) == "string") then
return serialize_string(form)
else
return tostring(form)
end
end
return {["apply-manglings"] = apply_manglings, ["check-binding-valid"] = check_binding_valid, ["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, sourcemap = sourcemap, traceback = traceback}
end
package.preload["fennel.friend"] = package.preload["fennel.friend"] or function(...)
local utils = require("fennel.utils")
local utf8_ok_3f, utf8 = pcall(require, "utf8")
local suggestions = {["$ 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", "making sure to use prefix operators, not infix"}, ["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 at least one pattern/body pair"] = {"adding a pattern and a body to execute when the pattern matches"}, ["expected binding and iterator"] = {"making sure you haven't omitted a local name or iterator"}, ["expected binding sequence"] = {"placing a table here in square brackets containing identifiers to bind"}, ["expected 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 pattern/body pairs"] = {"checking that every pattern has a body to go with it", "adding _ before the final body"},
["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 range to include start and stop"] = {"adding missing arguments"}, ["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"}, ["invalid 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"}, ["missing subject"] = {"adding an item to operate on"}, ["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"}, ["tried to reference a macro without calling it"] = {"renaming the macro so as not to conflict with locals"}, ["tried to reference a special form without calling it"] = {"making sure to use prefix operators, not infix", "wrapping the special in a function if you need it to be first class"}, ["tried to use unquote outside quote"] = {"moving the form to inside a quoted form", "removing the comma"}, ["tried to use vararg with operator"] = {"accumulating over the operands"}, ["unable to bind (.*)"] = {"replacing the %s with an identifier"}, ["unexpected arguments"] = {"removing an argument", "checking for typos"}, ["unexpected closing delimiter (.)"] = {"deleting %s", "adding matching opening delimiter earlier"}, ["unexpected iterator clause"] = {"removing an argument", "checking for typos"}, ["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 identifier: (.*)"] = {"looking to see if there's a typo", "using the _G table instead, eg. _G.%s if you really want a global", "moving this code to somewhere that %s is in scope", "binding %s as a local in the scope of this code"}, ["unused local (.*)"] = {"renaming the local to _%s if it is meant to be unused", "fixing a typo so %s is used", "disabling the linter which checks for unused locals"}, ["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 s = nil
for pat, sug in pairs(suggestions) do
if s then break end
local matches = {msg:match(pat)}
if (0 < #matches) then
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, s0 in ipairs(sug) do
local val_19_ = s0:format(unpack(matches))
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
s = tbl_17_
else
s = nil
end
end
return s
end
local function read_line(filename, line, _3fsource)
if _3fsource then
local matcher = string.gmatch((_3fsource .. "\n"), "(.-)(\13?\n)")
for _ = 2, line do
matcher()
end
return matcher()
else
local f = assert(_G.io.open(filename))
local function close_handlers_10_(ok_11_, ...)
f:close()
if ok_11_ then
return ...
else
return error(..., 0)
end
end
local function _184_()
for _ = 2, line do
f:read()
end
return f:read()
end
return close_handlers_10_(_G.xpcall(_184_, (package.loaded.fennel or debug).traceback))
end
end
local function sub(str, start, _end)
if ((_end < start) or (#str < start)) then
return ""
elseif utf8_ok_3f then
return string.sub(str, utf8.offset(str, start), ((utf8.offset(str, (_end + 1)) or (utf8.len(str) + 1)) - 1))
else
return string.sub(str, start, math.min(_end, str:len()))
end
end
local function highlight_line(codeline, col, _3fendcol, opts)
if ((opts and (false == opts["error-pinpoint"])) or (os and os.getenv and os.getenv("NO_COLOR"))) then
return codeline
else
local _187_ = (opts or {})
local error_pinpoint = _187_["error-pinpoint"]
local endcol = (_3fendcol or col)
local eol = nil
if utf8_ok_3f then
eol = utf8.len(codeline)
else
eol = string.len(codeline)
end
local _189_ = (error_pinpoint or {"\27[7m", "\27[0m"})
local open = _189_[1]
local close = _189_[2]
return (sub(codeline, 1, col) .. open .. sub(codeline, (col + 1), (endcol + 1)) .. close .. sub(codeline, (endcol + 2), eol))
end
end
local function friendly_msg(msg, _191_0, source, opts)
local _192_ = _191_0
local col = _192_["col"]
local endcol = _192_["endcol"]
local endline = _192_["endline"]
local filename = _192_["filename"]
local line = _192_["line"]
local ok, codeline = pcall(read_line, filename, line, source)
local endcol0 = nil
if (ok and codeline and (line ~= endline)) then
endcol0 = #codeline
else
endcol0 = endcol
end
local out = {msg, ""}
if (ok and codeline) then
if col then
table.insert(out, highlight_line(codeline, col, endcol0, opts))
else
table.insert(out, codeline)
end
end
for _, suggestion in ipairs((suggest(msg) or {})) do
table.insert(out, ("* Try %s."):format(suggestion))
end
return table.concat(out, "\n")
end
local function assert_compile(condition, msg, ast, source, opts)
if not condition then
local _196_ = utils["ast-source"](ast)
local col = _196_["col"]
local filename = _196_["filename"]
local line = _196_["line"]
error(friendly_msg(("%s:%s:%s Compile error: %s"):format((filename or "unknown"), (line or "?"), (col or "?"), msg), utils["ast-source"](ast), source, opts), 0)
end
return condition
end
local function parse_error(msg, filename, line, col, source, opts)
return error(friendly_msg(("%s:%s:%s Parse error: %s"):format(filename, line, col, msg), {col = col, filename = filename, line = line}, source, opts), 0)
end
return {["assert-compile"] = assert_compile, ["parse-error"] = parse_error}
end
package.preload["fennel.parser"] = package.preload["fennel.parser"] or function(...)
local utils = require("fennel.utils")
local friend = require("fennel.friend")
local unpack = (table.unpack or _G.unpack)
local function granulate(getchunk)
local c, index, done_3f = "", 1, false
local function _198_(parser_state)
if not done_3f then
if (index <= #c) then
local b = c:byte(index)
index = (index + 1)
return b
else
local _199_0 = getchunk(parser_state)
local function _200_()
local char = _199_0
return (char ~= "")
end
if ((nil ~= _199_0) and _200_()) then
local char = _199_0
c = char
index = 2
return c:byte()
else
local _ = _199_0
done_3f = true
return nil
end
end
end
end
local function _204_()
c = ""
return nil
end
return _198_, _204_
end
local function string_stream(str, _3foptions)
local str0 = str:gsub("^#!", ";;")
if _3foptions then
_3foptions.source = str0
end
local index = 1
local function _206_()
local r = str0:byte(index)
index = (index + 1)
return r
end
return _206_
end
local delims = {[123] = 125, [125] = true, [40] = 41, [41] = true, [91] = 93, [93] = true}
local function sym_char_3f(b)
local b0 = nil
if ("number" == type(b)) then
b0 = b
else
b0 = string.byte(b)
end
return ((32 < b0) and not delims[b0] and (b0 ~= 127) and (b0 ~= 34) and (b0 ~= 39) and (b0 ~= 126) and (b0 ~= 59) and (b0 ~= 44) and (b0 ~= 64) and (b0 ~= 96))
end
local prefixes = {[35] = "hashfn", [39] = "quote", [44] = "unquote", [96] = "quote"}
local function char_starter_3f(b)
return (((1 < b) and (b < 127)) or ((192 < b) and (b < 247)))
end
local function parser_fn(getbyte, filename, _208_0)
local _209_ = _208_0
local options = _209_
local comments = _209_["comments"]
local source = _209_["source"]
local unfriendly = _209_["unfriendly"]
local stack = {}
local line, byteindex, col, prev_col, lastb = 1, 0, 0, 0, nil
local function ungetb(ub)
if char_starter_3f(ub) then
col = (col - 1)
end
if (ub == 10) then
line, col = (line - 1), prev_col
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
if r then
byteindex = (byteindex + 1)
end
if (r and char_starter_3f(r)) then
col = (col + 1)
end
if (r == 10) then
line, col, prev_col = (line + 1), 0, col
end
return r
end
local function whitespace_3f(b)
local function _217_()
local _216_0 = options.whitespace
if (nil ~= _216_0) then
_216_0 = _216_0[b]
end
return _216_0
end
return ((b == 32) or ((9 <= b) and (b <= 13)) or _217_())
end
local function parse_error(msg, _3fcol_adjust)
local col0 = (col + (_3fcol_adjust or -1))
if (nil == utils["hook-opts"]("parse-error", options, msg, filename, (line or "?"), col0, source, utils.root.reset)) then
utils.root.reset()
if unfriendly then
return error(string.format("%s:%s:%s Parse error: %s", filename, (line or "?"), col0, msg), 0)
else
return friend["parse-error"](msg, filename, (line or "?"), col0, source, options)
end
end
end
local function parse_stream()
local whitespace_since_dispatch, done_3f, retval = true
local function set_source_fields(source0)
source0.byteend, source0.endcol, source0.endline = byteindex, (col - 1), line
return nil
end
local function dispatch(v)
local _221_0 = stack[#stack]
if (_221_0 == nil) then
retval, done_3f, whitespace_since_dispatch = v, true, false
return nil
elseif ((_G.type(_221_0) == "table") and (nil ~= _221_0.prefix)) then
local prefix = _221_0.prefix
local source0 = nil
do
local _222_0 = table.remove(stack)
set_source_fields(_222_0)
source0 = _222_0
end
local list = utils.list(utils.sym(prefix, source0), v)
for k, v0 in pairs(source0) do
list[k] = v0
end
return dispatch(list)
elseif (nil ~= _221_0) then
local top = _221_0
whitespace_since_dispatch = false
return table.insert(top, v)
end
end
local function badend()
local accum = utils.map(stack, "closer")
local _224_
if (#stack == 1) then
_224_ = ""
else
_224_ = "s"
end
return parse_error(string.format("expected closing delimiter%s %s", _224_, string.char(unpack(accum))))
end
local function skip_whitespace(b)
if (b and whitespace_3f(b)) then
whitespace_since_dispatch = true
return skip_whitespace(getb())
elseif (not b and (0 < #stack)) then
return badend()
else
return b
end
end
local function parse_comment(b, contents)
if (b and (10 ~= b)) then
local function _227_()
table.insert(contents, string.char(b))
return contents
end
return parse_comment(getb(), _227_())
elseif comments then
ungetb(10)
return dispatch(utils.comment(table.concat(contents), {filename = filename, line = line}))
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], col = (col - 1), filename = filename, line = line})
end
local function close_list(list)
return dispatch(setmetatable(list, getmetatable(utils.list())))
end
local function close_sequence(tbl)
local mt = getmetatable(utils.sequence())
for k, v in pairs(tbl) do
if ("number" ~= type(k)) then
mt[k] = v
tbl[k] = nil
end
end
return dispatch(setmetatable(tbl, mt))
end
local function add_comment_at(comments0, index, node)
local _231_0 = comments0[index]
if (nil ~= _231_0) then
local existing = _231_0
return table.insert(existing, node)
else
local _ = _231_0
comments0[index] = {node}
return nil
end
end
local function next_noncomment(tbl, i)
if utils["comment?"](tbl[i]) then
return next_noncomment(tbl, (i + 1))
elseif utils["sym?"](tbl[i], ":") then
return tostring(tbl[(i + 1)])
else
return tbl[i]
end
end
local function extract_comments(tbl)
local comments0 = {keys = {}, last = {}, values = {}}
while utils["comment?"](tbl[#tbl]) do
table.insert(comments0.last, 1, table.remove(tbl))
end
local last_key_3f = false
for i, node in ipairs(tbl) do
if not utils["comment?"](node) then
last_key_3f = not last_key_3f
elseif last_key_3f then
add_comment_at(comments0.values, next_noncomment(tbl, i), node)
else
add_comment_at(comments0.keys, next_noncomment(tbl, i), node)
end
end
for i = #tbl, 1, -1 do
if utils["comment?"](tbl[i]) then
table.remove(tbl, i)
end
end
return comments0
end
local function close_curly_table(tbl)
local comments0 = extract_comments(tbl)
local keys = {}
local val = {}
if ((#tbl % 2) ~= 0) then
byteindex = (byteindex - 1)
parse_error("expected even number of values in table literal")
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 = comments0
tbl.keys = keys
return dispatch(val)
end
local function close_table(b)
local top = table.remove(stack)
if (top == nil) then
parse_error(("unexpected closing delimiter " .. string.char(b)))
end
if (top.closer and (top.closer ~= b)) then
parse_error(("mismatched closing delimiter " .. string.char(b) .. ", expected " .. string.char(top.closer)))
end
set_source_fields(top)
if (b == 41) then
return close_list(top)
elseif (b == 93) then
return close_sequence(top)
else
return close_curly_table(top)
end
end
local function parse_string_loop(chars, b, state)
if b then
table.insert(chars, string.char(b))
end
local state0 = nil
do
local _242_0 = {state, b}
if ((_G.type(_242_0) == "table") and (_242_0[1] == "base") and (_242_0[2] == 92)) then
state0 = "backslash"
elseif ((_G.type(_242_0) == "table") and (_242_0[1] == "base") and (_242_0[2] == 34)) then
state0 = "done"
elseif ((_G.type(_242_0) == "table") and (_242_0[1] == "backslash") and (_242_0[2] == 10)) then
table.remove(chars, (#chars - 1))
state0 = "base"
else
local _ = _242_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 = {"\""}
if not parse_string_loop(chars, getb(), "base") then
badend()
end
table.remove(stack)
local raw = table.concat(chars)
local formatted = raw:gsub("[\7-\13]", escape_char)
local _246_0 = (rawget(_G, "loadstring") or load)(("return " .. formatted))
if (nil ~= _246_0) then
local load_fn = _246_0
return dispatch(load_fn())
elseif (_246_0 == nil) then
return parse_error(("Invalid string: " .. raw))
end
end
local function parse_prefix(b)
table.insert(stack, {bytestart = byteindex, col = (col - 1), 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, string.char(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 _252_0 = tonumber(number_with_stripped_underscores)
if (nil ~= _252_0) then
local x = _252_0
dispatch(x)
return true
else
local _ = _252_0
return false
end
end
end
local function check_malformed_sym(rawstr)
local function col_adjust(pat)
return (rawstr:find(pat) - utils.len(rawstr) - 1)
end
if (rawstr:match("^~") and (rawstr ~= "~=")) then
return parse_error("invalid character: ~")
elseif rawstr:match("%.[0-9]") then
return parse_error(("can't start multisym segment with a digit: " .. rawstr), col_adjust("%.[0-9]"))
elseif (rawstr:match("[%.:][%.:]") and (rawstr ~= "..") and (rawstr ~= "$...")) then
return parse_error(("malformed multisym: " .. rawstr), col_adjust("[%.:][%.:]"))
elseif ((rawstr ~= ":") and rawstr:match(":$")) then
return parse_error(("malformed multisym: " .. rawstr), col_adjust(":$"))
elseif rawstr:match(":.+[%.:]") then
return parse_error(("method must be last component of multisym: " .. rawstr), col_adjust(":.+[%.:]"))
else
return rawstr
end
end
local function parse_sym(b)
local source0 = {bytestart = byteindex, col = (col - 1), filename = filename, line = line}
local rawstr = table.concat(parse_sym_loop({string.char(b)}, getb()))
set_source_fields(source0)
if (rawstr == "true") then
return dispatch(true)
elseif (rawstr == "false") then
return dispatch(false)
elseif (rawstr == "...") then
return dispatch(utils.varg(source0))
elseif rawstr:match("^:.+$") then
return dispatch(rawstr:sub(2))
elseif not parse_number(rawstr) then
return dispatch(utils.sym(check_malformed_sym(rawstr), source0))
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()
elseif prefixes[b] then
parse_prefix(b)
elseif (sym_char_3f(b) or (b == string.byte("~"))) then
parse_sym(b)
elseif not utils["hook-opts"]("illegal-char", options, b, getb, ungetb, dispatch) then
parse_error(("invalid character: " .. string.char(b)))
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 _259_()
stack, line, byteindex, col, lastb = {}, 1, 0, 0, nil
return nil
end
return parse_stream, _259_
end
local function parser(stream_or_string, _3ffilename, _3foptions)
local filename = (_3ffilename or "unknown")
local options = (_3foptions or utils.root.options or {})
assert(("string" == type(filename)), "expected filename as second argument to parser")
if ("string" == type(stream_or_string)) then
return parser_fn(string_stream(stream_or_string, options), filename, options)
else
return parser_fn(stream_or_string, filename, options)
end
end
return {["string-stream"] = string_stream, ["sym-char?"] = sym_char_3f, granulate = granulate, parser = parser}
end
local utils = nil
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 default_opts = {["detect-cycles?"] = true, ["empty-as-sequence?"] = false, ["escape-newlines?"] = false, ["line-length"] = 80, ["max-sparse-gap"] = 10, ["metamethod?"] = true, ["one-line?"] = false, ["prefer-colon?"] = false, ["utf8?"] = true, depth = 128}
local lua_pairs = pairs
local lua_ipairs = ipairs
local function pairs(t)
local _1_0 = getmetatable(t)
if ((_G.type(_1_0) == "table") and (nil ~= _1_0.__pairs)) then
local p = _1_0.__pairs
return p(t)
else
local _ = _1_0
return lua_pairs(t)
end
end
local function ipairs(t)
local _3_0 = getmetatable(t)
if ((_G.type(_3_0) == "table") and (nil ~= _3_0.__ipairs)) then
local i = _3_0.__ipairs
return i(t)
else
local _ = _3_0
return lua_ipairs(t)
end
end
local function length_2a(t)
local _5_0 = getmetatable(t)
if ((_G.type(_5_0) == "table") and (nil ~= _5_0.__len)) then
local l = _5_0.__len
return l(t)
else
local _ = _5_0
return #t
end
end
local function get_default(key)
local _7_0 = default_opts[key]
if (_7_0 == nil) then
return error(("option '%s' doesn't have a default value, use the :after key to set it"):format(tostring(key)))
elseif (nil ~= _7_0) then
local v = _7_0
return v
end
end
local function getopt(options, key)
local _9_0 = options[key]
if ((_G.type(_9_0) == "table") and (nil ~= _9_0.once)) then
local val_2a = _9_0.once
return val_2a
else
local _3fval = _9_0
return _3fval
end
end
local function normalize_opts(options)
local tbl_14_ = {}
for k, v in pairs(options) do
local k_15_, v_16_ = nil, nil
local function _12_()
local _11_0 = v
if ((_G.type(_11_0) == "table") and (nil ~= _11_0.after)) then
local val = _11_0.after
return val
else
local function _13_()
return v.once
end
if ((_G.type(_11_0) == "table") and _13_()) then
return get_default(k)
else
local _ = _11_0
return v
end
end
end
k_15_, v_16_ = k, _12_()
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
return tbl_14_
end
local function sort_keys(_16_0, _18_0)
local _17_ = _16_0
local a = _17_[1]
local _19_ = _18_0
local b = _19_[1]
local ta = type(a)
local tb = type(b)
if ((ta == tb) and ((ta == "string") or (ta == "number"))) then
return (a < b)
else
local dta = type_order[ta]
local dtb = type_order[tb]
if (dta and dtb) then
return (dta < dtb)
elseif dta then
return true
elseif dtb then
return false
else
return (ta < tb)
end
end
end
local function max_index_gap(kv)
local gap = 0
if (0 < length_2a(kv)) then
local i = 0
for _, _22_0 in ipairs(kv) do
local _23_ = _22_0
local k = _23_[1]
if (gap < (k - i)) then
gap = (k - i)
end
i = k
end
end
return gap
end
local function fill_gaps(kv)
local missing_indexes = {}
local i = 0
for _, _26_0 in ipairs(kv) do
local _27_ = _26_0
local j = _27_[1]
i = (i + 1)
while (i < j) do
table.insert(missing_indexes, i)
i = (i + 1)
end
end
for _, k in ipairs(missing_indexes) do
table.insert(kv, k, {k})
end
return nil
end
local function table_kv_pairs(t, options)
local assoc_3f = false
local kv = {}
local insert = table.insert
for k, v in pairs(t) do
if ((type(k) ~= "number") or (k < 1)) then
assoc_3f = true
end
insert(kv, {k, v})
end
table.sort(kv, sort_keys)
if not assoc_3f then
if (options["max-sparse-gap"] < max_index_gap(kv)) then
assoc_3f = true
else
fill_gaps(kv)
end
end
if (length_2a(kv) == 0) then
return kv, "empty"
else
local function _31_()
if assoc_3f then
return "table"
else
return "seq"
end
end
return kv, _31_()
end
end
local function count_table_appearances(t, appearances)
if (type(t) == "table") then
if not appearances[t] then
appearances[t] = 1
for k, v in pairs(t) do
count_table_appearances(k, appearances)
count_table_appearances(v, appearances)
end
else
appearances[t] = ((appearances[t] or 0) + 1)
end
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)
if ("table" == type(t)) then
seen[t] = true
local res = nil
for k, v in pairs(t) do
if res then break end
res = (seen[k] or detect_cycle(k, seen) or seen[v] or detect_cycle(v, seen))
end
return res
end
end
local function visible_cycle_3f(t, options)
return (getopt(options, "detect-cycles?") and detect_cycle(t, {}) and save_table(t, options.seen) and (1 < (options.appearances[t] or 0)))
end
local function table_indent(indent, id)
local opener_length = nil
if id then
opener_length = (length_2a(tostring(id)) + 2)
else
opener_length = 1
end
return (indent + opener_length)
end
local pp = nil
local function concat_table_lines(elements, options, multiline_3f, indent, table_type, prefix, last_comment_3f)
local indent_str = ("\n" .. string.rep(" ", indent))
local open = nil
local function _38_()
if ("seq" == table_type) then
return "["
else
return "{"
end
end
open = ((prefix or "") .. _38_())
local close = nil
if ("seq" == table_type) then
close = "]"
else
close = "}"
end
local oneline = (open .. table.concat(elements, " ") .. close)
if (not getopt(options, "one-line?") and (multiline_3f or (options["line-length"] < (indent + length_2a(oneline))) or last_comment_3f)) then
local function _40_()
if last_comment_3f then
return indent_str
else
return ""
end
end
return (open .. table.concat(elements, indent_str) .. _40_() .. close)
else
return oneline
end
end
local function utf8_len(x)
local n = 0
for _ in string.gmatch(x, "[%z\1-\127\192-\247]") do
n = (n + 1)
end
return n
end
local function comment_3f(x)
if ("table" == type(x)) then
local fst = x[1]
return (("string" == type(fst)) and (nil ~= fst:find("^;")))
else
return false
end
end
local function pp_associative(t, kv, options, indent)
local multiline_3f = false
local id = options.seen[t]
if (options.depth <= options.level) then
return "{...}"
elseif (id and getopt(options, "detect-cycles?")) then
return ("@" .. id .. "{...}")
else
local visible_cycle_3f0 = visible_cycle_3f(t, options)
local id0 = (visible_cycle_3f0 and options.seen[t])
local indent0 = table_indent(indent, id0)
local slength = nil
if getopt(options, "utf8?") then
slength = utf8_len
else
local function _43_(_241)
return #_241
end
slength = _43_
end
local prefix = nil
if visible_cycle_3f0 then
prefix = ("@" .. id0)
else
prefix = ""
end
local items = nil
do
local options0 = normalize_opts(options)
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, _46_0 in ipairs(kv) do
local _47_ = _46_0
local k = _47_[1]
local v = _47_[2]
local val_19_ = nil
do
local k0 = pp(k, options0, (indent0 + 1), true)
local v0 = pp(v, options0, (indent0 + slength(k0) + 1))
multiline_3f = (multiline_3f or k0:find("\n") or v0:find("\n"))
val_19_ = (k0 .. " " .. v0)
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
items = tbl_17_
end
return concat_table_lines(items, options, multiline_3f, indent0, "table", prefix, false)
end
end
local function pp_sequence(t, kv, options, indent)
local multiline_3f = false
local id = options.seen[t]
if (options.depth <= options.level) then
return "[...]"
elseif (id and getopt(options, "detect-cycles?")) then
return ("@" .. id .. "[...]")
else
local visible_cycle_3f0 = visible_cycle_3f(t, options)
local id0 = (visible_cycle_3f0 and options.seen[t])
local indent0 = table_indent(indent, id0)
local prefix = nil
if visible_cycle_3f0 then
prefix = ("@" .. id0)
else
prefix = ""
end
local last_comment_3f = comment_3f(t[#t])
local items = nil
do
local options0 = normalize_opts(options)
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, _51_0 in ipairs(kv) do
local _52_ = _51_0
local _0 = _52_[1]
local v = _52_[2]
local val_19_ = nil
do
local v0 = pp(v, options0, indent0)
multiline_3f = (multiline_3f or v0:find("\n") or v0:find("^;"))
val_19_ = v0
end
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
items = tbl_17_
end
return concat_table_lines(items, options, multiline_3f, indent0, "seq", prefix, last_comment_3f)
end
end
local function concat_lines(lines, options, indent, force_multi_line_3f)
if (length_2a(lines) == 0) then
if getopt(options, "empty-as-sequence?") then
return "[]"
else
return "{}"
end
else
local oneline = nil
local _56_
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for _, line in ipairs(lines) do
local val_19_ = line:gsub("^%s+", "")
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
_56_ = tbl_17_
end
oneline = table.concat(_56_, " ")
if (not getopt(options, "one-line?") and (force_multi_line_3f or oneline:find("\n") or (options["line-length"] < (indent + length_2a(oneline))))) then
return table.concat(lines, ("\n" .. string.rep(" ", indent)))
else
return oneline
end
end
end
local function pp_metamethod(t, metamethod, options, indent)
if (options.depth <= options.level) then
if getopt(options, "empty-as-sequence?") then
return "[...]"
else
return "{...}"
end
else
local _ = nil
local function _61_(_241)
return visible_cycle_3f(_241, options)
end
options["visible-cycle?"] = _61_
_ = nil
local lines, force_multi_line_3f = nil, nil
do
local options0 = normalize_opts(options)
lines, force_multi_line_3f = metamethod(t, pp, options0, indent)
end
options["visible-cycle?"] = nil
local _62_0 = type(lines)
if (_62_0 == "string") then
return lines
elseif (_62_0 == "table") then
return concat_lines(lines, options, indent, force_multi_line_3f)
else
local _0 = _62_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 _65_0 = nil
if getopt(options, "metamethod?") then
local _66_0 = x
if (nil ~= _66_0) then
local _67_0 = getmetatable(_66_0)
if (nil ~= _67_0) then
_65_0 = _67_0.__fennelview
else
_65_0 = _67_0
end
else
_65_0 = _66_0
end
else
_65_0 = nil
end
if (nil ~= _65_0) then
local metamethod = _65_0
x0 = pp_metamethod(x, metamethod, options, indent)
else
local _ = _65_0
local _71_0, _72_0 = table_kv_pairs(x, options)
if (true and (_72_0 == "empty")) then
local _0 = _71_0
if getopt(options, "empty-as-sequence?") then
x0 = "[]"
else
x0 = "{}"
end
elseif ((nil ~= _71_0) and (_72_0 == "table")) then
local kv = _71_0
x0 = pp_associative(x, kv, options, indent)
elseif ((nil ~= _71_0) and (_72_0 == "seq")) then
local kv = _71_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 _76_0 = string.gsub(tostring(n), ",", ".")
return _76_0
end
local function colon_string_3f(s)
return s:find("^[-%w?^_!$%&*+./|<=>]+$")
end
local utf8_inits = {{["max-byte"] = 127, ["max-code"] = 127, ["min-byte"] = 0, ["min-code"] = 0, len = 1}, {["max-byte"] = 223, ["max-code"] = 2047, ["min-byte"] = 192, ["min-code"] = 128, len = 2}, {["max-byte"] = 239, ["max-code"] = 65535, ["min-byte"] = 224, ["min-code"] = 2048, len = 3}, {["max-byte"] = 247, ["max-code"] = 1114111, ["min-byte"] = 240, ["min-code"] = 65536, len = 4}}
local function default_byte_escape(byte, _options)
return ("\\%03d"):format(byte)
end
local function utf8_escape(str, options)
local function validate_utf8(str0, index)
local inits = utf8_inits
local byte = string.byte(str0, index)
local init = nil
do
local ret = nil
for _, init0 in ipairs(inits) do
if ret then break end
ret = (byte and (function(_77_,_78_,_79_) return (_77_ <= _78_) and (_78_ <= _79_) end)(init0["min-byte"],byte,init0["max-byte"]) and init0)
end
init = ret
end
local code = nil
local function _80_()
local code0 = nil
if init then
code0 = (byte - init["min-byte"])
else
code0 = nil
end
for i = (index + 1), (index + init.len + -1) do
local byte0 = string.byte(str0, i)
code0 = (byte0 and code0 and ((128 <= byte0) and (byte0 <= 191)) and ((code0 * 64) + (byte0 - 128)))
end
return code0
end
code = (init and _80_())
if (code and (function(_82_,_83_,_84_) return (_82_ <= _83_) and (_83_ <= _84_) end)(init["min-code"],code,init["max-code"]) and not ((55296 <= code) and (code <= 57343))) then
return init.len
end
end
local index = 1
local output = {}
local byte_escape = (getopt(options, "byte-escape") or default_byte_escape)
while (index <= #str) do
local nexti = (string.find(str, "[\128-\255]", index) or (#str + 1))
local len = validate_utf8(str, nexti)
table.insert(output, string.sub(str, index, (nexti + (len or 0) + -1)))
if (not len and (nexti <= #str)) then
table.insert(output, byte_escape(str:byte(nexti), options))
end
if len then
index = (nexti + len)
else
index = (nexti + 1)
end
end
return table.concat(output)
end
local function pp_string(str, options, indent)
local len = length_2a(str)
local esc_newline_3f = ((len < 2) or (getopt(options, "escape-newlines?") and (len < (options["line-length"] - indent))))
local byte_escape = (getopt(options, "byte-escape") or default_byte_escape)
local escs = nil
local _88_
if esc_newline_3f then
_88_ = "\\n"
else
_88_ = "\n"
end
local function _90_(_241, _242)
return byte_escape(_242:byte(), options)
end
escs = setmetatable({["\""] = "\\\"", ["\11"] = "\\v", ["\12"] = "\\f", ["\13"] = "\\r", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\\"] = "\\\\", ["\n"] = _88_}, {__index = _90_})
local str0 = ("\"" .. str:gsub("[%c\\\"]", escs) .. "\"")
if getopt(options, "utf8?") then
return utf8_escape(str0, options)
else
return str0
end
end
local function make_options(t, options)
local defaults = nil
do
local tbl_14_ = {}
for k, v in pairs(default_opts) do
local k_15_, v_16_ = k, v
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
defaults = tbl_14_
end
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 _93_(x, options, indent, colon_3f)
local indent0 = (indent or 0)
local options0 = (options or make_options(x))
local x0 = nil
if options0.preprocess then
x0 = options0.preprocess(x, options0)
else
x0 = x
end
local tv = type(x0)
local function _96_()
local _95_0 = getmetatable(x0)
if ((_G.type(_95_0) == "table") and true) then
local __fennelview = _95_0.__fennelview
return __fennelview
end
end
if ((tv == "table") or ((tv == "userdata") and _96_())) then
return pp_table(x0, options0, indent0)
elseif (tv == "number") then
return number__3estring(x0)
else
local function _98_()
if (colon_3f ~= nil) then
return colon_3f
elseif ("function" == type(options0["prefer-colon?"])) then
return options0["prefer-colon?"](x0)
else
return getopt(options0, "prefer-colon?")
end
end
if ((tv == "string") and colon_string_3f(x0) and _98_()) then
return (":" .. x0)
elseif (tv == "string") then
return pp_string(x0, options0, indent0)
elseif ((tv == "boolean") or (tv == "nil")) then
return tostring(x0)
else
return ("#<" .. tostring(x0) .. ">")
end
end
end
pp = _93_
local function view(x, _3foptions)
return pp(x, make_options(x, _3foptions), 0)
end
return view
end
package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(...)
local view = require("fennel.view")
local version = "1.3.2-dev"
local function luajit_vm_3f()
return ((nil ~= _G.jit) and (type(_G.jit) == "table") and (nil ~= _G.jit.on) and (nil ~= _G.jit.off) and (type(_G.jit.version_num) == "number"))
end
local function luajit_vm_version()
local jit_os = nil
if (_G.jit.os == "OSX") then
jit_os = "macOS"
else
jit_os = _G.jit.os
end
return (_G.jit.version .. " " .. jit_os .. "/" .. _G.jit.arch)
end
local function fengari_vm_3f()
return ((nil ~= _G.fengari) and (type(_G.fengari) == "table") and (nil ~= _G.fengari.VERSION) and (type(_G.fengari.VERSION_NUM) == "number"))
end
local function fengari_vm_version()
return (_G.fengari.RELEASE .. " (" .. _VERSION .. ")")
end
local function lua_vm_version()
if luajit_vm_3f() then
return luajit_vm_version()
elseif fengari_vm_3f() then
return fengari_vm_version()
else
return ("PUC " .. _VERSION)
end
end
local function runtime_version(_3fas_table)
if _3fas_table then
return {fennel = version, lua = lua_vm_version()}
else
return ("Fennel " .. version .. " on " .. lua_vm_version())
end
end
local function warn(message)
if (_G.io and _G.io.stderr) then
return (_G.io.stderr):write(("--WARNING: %s\n"):format(tostring(message)))
end
end
local len = nil
do
local _104_0, _105_0 = pcall(require, "utf8")
if ((_104_0 == true) and (nil ~= _105_0)) then
local utf8 = _105_0
len = utf8.len
else
local _ = _104_0
len = string.len
end
end
local kv_order = {boolean = 2, number = 1, string = 3, table = 4}
local function kv_compare(a, b)
local _107_0, _108_0 = type(a), type(b)
if (((_107_0 == "number") and (_108_0 == "number")) or ((_107_0 == "string") and (_108_0 == "string"))) then
return (a < b)
else
local function _109_()
local a_t = _107_0
local b_t = _108_0
return (a_t ~= b_t)
end
if (((nil ~= _107_0) and (nil ~= _108_0)) and _109_()) then
local a_t = _107_0
local b_t = _108_0
return ((kv_order[a_t] or 5) < (kv_order[b_t] or 5))
else
local _ = _107_0
return (tostring(a) < tostring(b))
end
end
end
local function add_stable_keys(succ, prev_key, src, _3fpred)
local first = prev_key
local last = nil
do
local prev = prev_key
for _, k in ipairs(src) do
if ((prev == k) or (succ[k] ~= nil) or (_3fpred and not _3fpred(k))) then
prev = prev
else
if (first == nil) then
first = k
prev = k
elseif (prev ~= nil) then
succ[prev] = k
prev = k
else
prev = k
end
end
end
last = prev
end
return succ, last, first
end
local function stablepairs(t)
local mt_keys = nil
do
local _113_0 = getmetatable(t)
if (nil ~= _113_0) then
_113_0 = _113_0.keys
end
mt_keys = _113_0
end
local succ, prev, first_mt = nil, nil, nil
local function _115_(_241)
return t[_241]
end
succ, prev, first_mt = add_stable_keys({}, nil, (mt_keys or {}), _115_)
local pairs_keys = nil
do
local _116_0 = nil
do
local tbl_17_ = {}
local i_18_ = #tbl_17_
for k in pairs(t) do
local val_19_ = k
if (nil ~= val_19_) then
i_18_ = (i_18_ + 1)
tbl_17_[i_18_] = val_19_
end
end
_116_0 = tbl_17_
end
table.sort(_116_0, kv_compare)
pairs_keys = _116_0
end
local succ0, _, first_after_mt = add_stable_keys(succ, prev, pairs_keys)
local first = nil
if (first_mt == nil) then
first = first_after_mt
else
first = first_mt
end
local function stablenext(tbl, key)
local _119_0 = nil
if (key == nil) then
_119_0 = first
else
_119_0 = succ0[key]
end
if (nil ~= _119_0) then
local next_key = _119_0
local _121_0 = tbl[next_key]
if (_121_0 ~= nil) then
return next_key, _121_0
else
return _121_0
end
end
end
return stablenext, t, nil
end
local function get_in(tbl, path, _3ffallback)
assert(("table" == type(tbl)), "get-in expects path to be a table")
if (0 == #path) then
return _3ffallback
else
local _124_0 = nil
do
local t = tbl
for _, k in ipairs(path) do
if (nil == t) then break end
local _125_0 = type(t)
if (_125_0 == "table") then
t = t[k]
else
t = nil
end
end
_124_0 = t
end
if (nil ~= _124_0) then
local res = _124_0
return res
else
local _ = _124_0
return _3ffallback
end
end
end
local function map(t, f, _3fout)
local out = (_3fout or {})
local f0 = nil
if (type(f) == "function") then
f0 = f
else
local function _129_(_241)
return _241[f]
end
f0 = _129_
end
for _, x in ipairs(t) do
local _131_0 = f0(x)
if (nil ~= _131_0) then
local v = _131_0
table.insert(out, v)
end
end
return out
end
local function kvmap(t, f, _3fout)
local out = (_3fout or {})
local f0 = nil
if (type(f) == "function") then
f0 = f
else
local function _133_(_241)
return _241[f]
end
f0 = _133_
end
for k, x in stablepairs(t) do
local _135_0, _136_0 = f0(k, x)
if ((nil ~= _135_0) and (nil ~= _136_0)) then
local key = _135_0
local value = _136_0
out[key] = value
elseif (nil ~= _135_0) then
local value = _135_0
table.insert(out, value)
end
end
return out
end
local function copy(from, _3fto)
local tbl_14_ = (_3fto or {})
for k, v in pairs((from or {})) do
local k_15_, v_16_ = k, v
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
return tbl_14_
end
local function member_3f(x, tbl, _3fn)
local _139_0 = tbl[(_3fn or 1)]
if (_139_0 == x) then
return true
elseif (_139_0 == nil) then
return nil
else
local _ = _139_0
return member_3f(x, tbl, ((_3fn or 1) + 1))
end
end
local function maxn(tbl)
local max = 0
for k in pairs(tbl) do
if ("number" == type(k)) then
max = math.max(max, k)
else
max = max
end
end
return max
end
local function every_3f(t, predicate)
local result = true
for _, item in ipairs(t) do
if not result then break end
result = predicate(item)
end
return result
end
local function allpairs(tbl)
assert((type(tbl) == "table"), "allpairs expects a table")
local t = tbl
local seen = {}
local function allpairs_next(_, state)
local next_state, value = next(t, state)
if seen[next_state] then
return allpairs_next(nil, next_state)
elseif next_state then
seen[next_state] = true
return next_state, value
else
local _142_0 = getmetatable(t)
if ((_G.type(_142_0) == "table") and true) then
local __index = _142_0.__index
if ("table" == type(__index)) then
t = __index
return allpairs_next(t)
end
end
end
end
return allpairs_next
end
local function deref(self)
return self[1]
end
local nil_sym = nil
local function list__3estring(self, _3fview, _3foptions, _3findent)
local safe = {}
local view0 = nil
if _3fview then
local function _146_(_241)
return _3fview(_241, _3foptions, _3findent)
end
view0 = _146_
else
view0 = view
end
local max = maxn(self)
for i = 1, max do
safe[i] = (((self[i] == nil) and nil_sym) or self[i])
end
return ("(" .. table.concat(map(safe, view0), " ", 1, max) .. ")")
end
local function comment_view(c)
return c, true
end
local function sym_3d(a, b)
return ((deref(a) == deref(b)) and (getmetatable(a) == getmetatable(b)))
end
local function sym_3c(a, b)
return (a[1] < tostring(b))
end
local symbol_mt = {"SYMBOL", __eq = sym_3d, __fennelview = deref, __lt = sym_3c, __tostring = deref}
local expr_mt = nil
local function _148_(x)
return tostring(deref(x))
end
expr_mt = {"EXPR", __tostring = _148_}
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 varg_mt = {"VARARG", __fennelview = deref, __tostring = deref}
local getenv = nil
local function _149_()
return nil
end
getenv = ((os and os.getenv) or _149_)
local function debug_on_3f(flag)
local level = (getenv("FENNEL_DEBUG") or "")
return ((level == "all") or level:find(flag))
end
local function list(...)
return setmetatable({...}, list_mt)
end
local function sym(str, _3fsource)
local _150_
do
local tbl_14_ = {str}
for k, v in pairs((_3fsource or {})) do
local k_15_, v_16_ = nil, nil
if (type(k) == "string") then
k_15_, v_16_ = k, v
else
k_15_, v_16_ = nil
end
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
_150_ = tbl_14_
end
return setmetatable(_150_, symbol_mt)
end
nil_sym = sym("nil")
local function sequence(...)
local function _153_(seq, view0, inspector, indent)
local opts = nil
do
inspector["empty-as-sequence?"] = {after = inspector["empty-as-sequence?"], once = true}
inspector["metamethod?"] = {after = inspector["metamethod?"], once = false}
opts = inspector
end
return view0(seq, opts, indent)
end
return setmetatable({...}, {__fennelview = _153_, sequence = sequence_marker})
end
local function expr(strcode, etype)
return setmetatable({strcode, type = etype}, expr_mt)
end
local function comment_2a(contents, _3fsource)
local _154_ = (_3fsource or {})
local filename = _154_["filename"]
local line = _154_["line"]
return setmetatable({contents, filename = filename, line = line}, comment_mt)
end
local function varg(_3fsource)
local _155_
do
local tbl_14_ = {"..."}
for k, v in pairs((_3fsource or {})) do
local k_15_, v_16_ = nil, nil
if (type(k) == "string") then
k_15_, v_16_ = k, v
else
k_15_, v_16_ = nil
end
if ((k_15_ ~= nil) and (v_16_ ~= nil)) then
tbl_14_[k_15_] = v_16_
end
end
_155_ = tbl_14_
end
return setmetatable(_155_, varg_mt)
end
local function expr_3f(x)
return ((type(x) == "table") and (getmetatable(x) == expr_mt) and x)
end
local function varg_3f(x)
return ((type(x) == "table") and (getmetatable(x) == varg_mt) and x)
end
local function list_3f(x)
return ((type(x) == "table") and (getmetatable(x) == list_mt) and x)
end
local function sym_3f(x, _3fname)
return ((type(x) == "table") and (getmetatable(x) == symbol_mt) and ((nil == _3fname) or (x[1] == _3fname)) and x)
end
local function sequence_3f(x)
local mt = ((type(x) == "table") and getmetatable(x))
return (mt and (mt.sequence == sequence_marker) and x)
end
local function comment_3f(x)
return ((type(x) == "table") and (getmetatable(x) == comment_mt) and x)
end
local function table_3f(x)
return ((type(x) == "table") and not varg_3f(x) and (getmetatable(x) ~= list_mt) and (getmetatable(x) ~= symbol_mt) and not comment_3f(x) and x)
end
local function kv_table_3f(t)
if table_3f(t) then
local nxt, t0, k = pairs(t)
local len0 = #t0
local next_state = nil
if (0 == len0) then
next_state = k
else
next_state = len0
end
return ((nil ~= nxt(t0, next_state)) and t0)
end
end
local function string_3f(x)
return (type(x) == "string")
end
local function multi_sym_3f(str)
if sym_3f(str) then
return multi_sym_3f(tostring(str))
elseif (type(str) ~= "string") then
return false
else
local function _160_()
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 ((0 < #parts) and parts)
end
return ((str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and _160_())
end
end
local function quoted_3f(symbol)
return symbol.quoted
end
local function idempotent_expr_3f(x)
return ((type(x) == "string") or (type(x) == "integer") or (type(x) == "number") or (sym_3f(x) and not multi_sym_3f(x)))
end
local function ast_source(ast)
if (table_3f(ast) or sequence_3f(ast)) then
return (getmetatable(ast) or {})
elseif ("table" == type(ast)) then
return ast
else
return {}
end
end
local function walk_tree(root, f, _3fcustom_iterator)
local function walk(iterfn, parent, idx, node)
if f(idx, node, parent) then
for k, v in iterfn(node) do
walk(iterfn, node, k, v)
end
return nil
end
end
walk((_3fcustom_iterator or pairs), nil, nil, root)
return root
end
local lua_keywords = {["and"] = true, ["break"] = true, ["do"] = true, ["else"] = true, ["elseif"] = true, ["end"] = true, ["false"] = true, ["for"] = true, ["function"] = true, ["goto"] = true, ["if"] = true, ["in"] = true, ["local"] = true, ["nil"] = true, ["not"] = true, ["or"] = true, ["repeat"] = true, ["return"] = true, ["then"] = true, ["true"] = true, ["until"] = true, ["while"] = true}
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 _166_()
end
root = {chunk = nil, options = nil, reset = _166_, scope = nil}
root["set-reset"] = function(_167_0)
local _168_ = _167_0
local chunk = _168_["chunk"]
local options = _168_["options"]
local reset = _168_["reset"]
local scope = _168_["scope"]
root.reset = function()
root.chunk, root.scope, root.options, root.reset = chunk, scope, options, reset
return nil
end
return root.reset
end
local warned = {}
local function check_plugin_version(_169_0)
local _170_ = _169_0
local plugin = _170_
local name = _170_["name"]
local versions = _170_["versions"]
if (not member_3f(version:gsub("-dev", ""), (versions or {})) and not warned[plugin]) then
warned[plugin] = true
return warn(string.format("plugin %s does not support Fennel version %s", (name or "unknown"), version))
end
end
local function hook_opts(event, _3foptions, ...)
local plugins = nil
local function _173_(...)
local _172_0 = _3foptions
if (nil ~= _172_0) then
_172_0 = _172_0.plugins
end
return _172_0
end
local function _176_(...)
local _175_0 = root.options
if (nil ~= _175_0) then
_175_0 = _175_0.plugins
end
return _175_0
end
plugins = (_173_(...) or _176_(...))
if plugins then
local result = nil
for _, plugin in ipairs(plugins) do
if result then break end
check_plugin_version(plugin)
local _178_0 = plugin[event]
if (nil ~= _178_0) then
local f = _178_0
result = f(...)
else
result = nil
end
end
return result
end
end
local function hook(event, ...)
return hook_opts(event, root.options, ...)
end
return {["ast-source"] = ast_source, ["comment?"] = comment_3f, ["debug-on?"] = debug_on_3f, ["every?"] = every_3f, ["expr?"] = expr_3f, ["get-in"] = get_in, ["hook-opts"] = hook_opts, ["idempotent-expr?"] = idempotent_expr_3f, ["kv-table?"] = kv_table_3f, ["list?"] = list_3f, ["lua-keywords"] = lua_keywords, ["macro-path"] = table.concat({"./?.fnl", "./?/init-macros.fnl", "./?/init.fnl", getenv("FENNEL_MACRO_PATH")}, ";"), ["member?"] = member_3f, ["multi-sym?"] = multi_sym_3f, ["propagate-options"] = propagate_options, ["quoted?"] = quoted_3f, ["runtime-version"] = runtime_version, ["sequence?"] = sequence_3f, ["string?"] = string_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, expr = expr, hook = hook, kvmap = kvmap, len = len, list = list, map = map, maxn = maxn, path = table.concat({"./?.fnl", "./?/init.fnl", getenv("FENNEL_PATH")}, ";"), root = root, sequence = sequence, stablepairs = stablepairs, sym = sym, varg = varg, version = version, warn = warn}
end
utils = require("fennel.utils")
local parser = require("fennel.parser")
local compiler = require("fennel.compiler")
local specials = require("fennel.specials")
local repl = require("fennel.repl")
local view = require("fennel.view")
local function eval_env(env, opts)
if (env == "_COMPILER") then
local env0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {}, opts)
if (opts.allowedGlobals == nil) then
opts.allowedGlobals = specials["current-global-names"](env0)
end
return specials["wrap-env"](env0)
else
return (env and specials["wrap-env"](env))
end
end
local function eval_opts(options, str)
local opts = utils.copy(options)
if (opts.allowedGlobals == nil) then
opts.allowedGlobals = specials["current-global-names"](opts.env)
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, _3foptions, ...)
local opts = eval_opts(_3foptions, str)
local env = eval_env(opts.env, opts)
local lua_source = compiler["compile-string"](str, opts)
local loader = nil
local function _735_(...)
if opts.filename then
return ("@" .. opts.filename)
else
return str
end
end
loader = specials["load-code"](lua_source, env, _735_(...))
opts.filename = nil
return loader(...)
end
local function dofile_2a(filename, _3foptions, ...)
local opts = utils.copy(_3foptions)
local f = assert(io.open(filename, "rb"))
local source = assert(f:read("*all"), ("Could not read " .. filename))
f:close()
opts.filename = filename
return eval(source, opts, ...)
end
local function syntax()
local body_3f = {"when", "with-open", "collect", "icollect", "fcollect", "lambda", "\206\187", "macro", "match", "match-try", "case", "case-try", "accumulate", "faccumulate", "doto"}
local binding_3f = {"collect", "icollect", "fcollect", "each", "for", "let", "with-open", "accumulate", "faccumulate"}
local define_3f = {"fn", "lambda", "\206\187", "var", "local", "macro", "macros", "global"}
local out = {}
for k, v in pairs(compiler.scopes.global.specials) do
local metadata = (compiler.metadata[v] or {})
out[k] = {["binding-form?"] = utils["member?"](k, binding_3f), ["body-form?"] = metadata["fnl/body-form?"], ["define?"] = utils["member?"](k, define_3f), ["special?"] = true}
end
for k, v in pairs(compiler.scopes.global.macros) do
out[k] = {["binding-form?"] = utils["member?"](k, binding_3f), ["body-form?"] = utils["member?"](k, body_3f), ["define?"] = utils["member?"](k, define_3f), ["macro?"] = true}
end
for k, v in pairs(_G) do
local _736_0 = type(v)
if (_736_0 == "function") then
out[k] = {["function?"] = true, ["global?"] = true}
elseif (_736_0 == "table") then
for k2, v2 in pairs(v) do
if (("function" == type(v2)) and (k ~= "_G")) then
out[(k .. "." .. k2)] = {["function?"] = true, ["global?"] = true}
end
end
out[k] = {["global?"] = true}
end
end
return out
end
local mod = {["ast-source"] = utils["ast-source"], ["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-path"] = utils["macro-path"], ["macro-searchers"] = specials["macro-searchers"], ["make-searcher"] = specials["make-searcher"], ["multi-sym?"] = utils["multi-sym?"], ["runtime-version"] = utils["runtime-version"], ["search-module"] = specials["search-module"], ["sequence?"] = utils["sequence?"], ["string-stream"] = parser["string-stream"], ["sym-char?"] = parser["sym-char?"], ["sym?"] = utils["sym?"], ["table?"] = utils["table?"], ["varg?"] = utils["varg?"], 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"], macroPath = utils["macro-path"], macroSearchers = specials["macro-searchers"], makeSearcher = specials["make-searcher"], make_searcher = specials["make-searcher"], mangle = compiler["global-mangling"], metadata = compiler.metadata, parser = parser.parser, path = utils.path, repl = repl, runtimeVersion = utils["runtime-version"], 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 = utils.version, view = view}
mod.install = function(_3fopts)
table.insert((package.searchers or package.loaders), specials["make-searcher"](_3fopts))
return mod
end
utils["fennel-module"] = mod
do
local module_name = "fennel.macros"
local _ = nil
local function _739_()
return mod
end
package.preload[module_name] = _739_
_ = nil
local env = nil
do
local _740_0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
_740_0["utils"] = utils
_740_0["fennel"] = mod
env = _740_0
end
local built_ins = eval([===[;; These macros are awkward because their definition cannot rely on the any
;; built-in macros, only special forms. (no when, no icollect, etc)
(fn copy [t]
(let [out []]
(each [_ v (ipairs t)] (table.insert out v))
(setmetatable out (getmetatable t))))
(fn ->* [val ...]
"Thread-first macro.
Take the first value and splice it into the second form as its first argument.
The value of the second form is spliced into the first arg of the third, etc."
(var x val)
(each [_ e (ipairs [...])]
(let [elt (if (list? e) (copy e) (list e))]
(table.insert elt 2 x)
(set x elt)))
x)
(fn ->>* [val ...]
"Thread-last macro.
Same as ->, except splices the value into the last position of each form
rather than the first."
(var x val)
(each [_ e (ipairs [...])]
(let [elt (if (list? e) (copy e) (list e))]
(table.insert elt x)
(set x elt)))
x)
(fn -?>* [val ?e ...]
"Nil-safe thread-first macro.
Same as -> except will short-circuit with nil when it encounters a nil value."
(if (= nil ?e)
val
(let [el (if (list? ?e) (copy ?e) (list ?e))
tmp (gensym)]
(table.insert el 2 tmp)
`(let [,tmp ,val]
(if (not= nil ,tmp)
(-?> ,el ,...)
,tmp)))))
(fn -?>>* [val ?e ...]
"Nil-safe thread-last macro.
Same as ->> except will short-circuit with nil when it encounters a nil value."
(if (= nil ?e)
val
(let [el (if (list? ?e) (copy ?e) (list ?e))
tmp (gensym)]
(table.insert el tmp)
`(let [,tmp ,val]
(if (not= ,tmp nil)
(-?>> ,el ,...)
,tmp)))))
(fn ?dot [tbl ...]
"Nil-safe table look up.
Same as . (dot), except will short-circuit with nil when it encounters
a nil value in any of subsequent keys."
(let [head (gensym :t)
lookups `(do
(var ,head ,tbl)
,head)]
(each [_ k (ipairs [...])]
;; Kinda gnarly to reassign in place like this, but it emits the best lua.
;; With this impl, it emits a flat, concise, and readable set of ifs
(table.insert lookups (# lookups) `(if (not= nil ,head)
(set ,head (. ,head ,k)))))
lookups))
(fn doto* [val ...]
"Evaluate val and splice it into the first argument of subsequent forms."
(assert (not= val nil) "missing subject")
(let [rebind? (or (not (sym? val))
(multi-sym? val))
name (if rebind? (gensym) val)
form (if rebind? `(let [,name ,val]) `(do))]
(each [_ elt (ipairs [...])]
(let [elt (if (list? elt) (copy elt) (list elt))]
(table.insert elt 2 name)
(table.insert form elt)))
(table.insert form name)
form))
(fn when* [condition body1 ...]
"Evaluate body for side-effects only when condition is truthy."
(assert body1 "expected body")
`(if ,condition
(do
,body1
,...)))
(fn with-open* [closable-bindings ...]
"Like `let`, but invokes (v:close) on each binding after evaluating the body.
The body is evaluated inside `xpcall` so that bound values will be closed upon
encountering an error before propagating it."
(let [bodyfn `(fn []
,...)
closer `(fn close-handlers# [ok# ...]
(if ok# ... (error ... 0)))
traceback `(. (or package.loaded.fennel debug) :traceback)]
(for [i 1 (length closable-bindings) 2]
(assert (sym? (. closable-bindings i))
"with-open only allows symbols in bindings")
(table.insert closer 4 `(: ,(. closable-bindings i) :close)))
`(let ,closable-bindings
,closer
(close-handlers# (_G.xpcall ,bodyfn ,traceback)))))
(fn extract-into [iter-tbl]
(var (into iter-out found?) (values [] (copy iter-tbl)))
(for [i (length iter-tbl) 2 -1]
(let [item (. iter-tbl i)]
(if (or (sym? item "&into") (= :into item))
(do
(assert (not found?) "expected only one &into clause")
(set found? true)
(set into (. iter-tbl (+ i 1)))
(table.remove iter-out i)
(table.remove iter-out i)))))
(assert (or (not found?) (sym? into) (table? into) (list? into))
"expected table, function call, or symbol in &into clause")
(values into iter-out found?))
(fn collect* [iter-tbl key-expr value-expr ...]
"Return a table made by running an iterator and evaluating an expression that
returns key-value pairs to be inserted sequentially into the table. This can
be thought of as a table comprehension. The body should provide two expressions
(used as key and value) or nil, which causes it to be omitted.
For example,
(collect [k v (pairs {:apple \"red\" :orange \"orange\"})]
(values v k))
returns
{:red \"apple\" :orange \"orange\"}
Supports an &into clause after the iterator to put results in an existing table.
Supports early termination with an &until clause."
(assert (and (sequence? iter-tbl) (<= 2 (length iter-tbl)))
"expected iterator binding table")
(assert (not= nil key-expr) "expected key and value expression")
(assert (= nil ...)
"expected 1 or 2 body expressions; wrap multiple expressions with do")
(let [kv-expr (if (= nil value-expr) key-expr `(values ,key-expr ,value-expr))
(into iter) (extract-into iter-tbl)]
`(let [tbl# ,into]
(each ,iter
(let [(k# v#) ,kv-expr]
(if (and (not= k# nil) (not= v# nil))
(tset tbl# k# v#))))
tbl#)))
(fn seq-collect [how iter-tbl value-expr ...]
"Common part between icollect and fcollect for producing sequential tables.
Iteration code only differs in using the for or each keyword, the rest
of the generated code is identical."
(assert (not= nil value-expr) "expected table value expression")
(assert (= nil ...)
"expected exactly one body expression. Wrap multiple expressions in do")
(let [(into iter has-into?) (extract-into iter-tbl)]
(if has-into?
`(let [tbl# ,into]
(,how ,iter (table.insert tbl# ,value-expr))
tbl#)
;; believe it or not, using a var here has a pretty good performance
;; boost: https://p.hagelb.org/icollect-performance.html
;; but it doesn't always work with &into clauses, so skip if that's used
`(let [tbl# []]
(var i# 0)
(,how ,iter
(let [val# ,value-expr]
(when (not= nil val#)
(set i# (+ i# 1))
(tset tbl# i# val#))))
tbl#))))
(fn icollect* [iter-tbl value-expr ...]
"Return a sequential table made by running an iterator and evaluating an
expression that returns values to be inserted sequentially into the table.
This can be thought of as a table comprehension. If the body evaluates to nil
that element is omitted.
For example,
(icollect [_ v (ipairs [1 2 3 4 5])]
(when (not= v 3)
(* v v)))
returns
[1 4 16 25]
Supports an &into clause after the iterator to put results in an existing table.
Supports early termination with an &until clause."
(assert (and (sequence? iter-tbl) (<= 2 (length iter-tbl)))
"expected iterator binding table")
(seq-collect 'each iter-tbl value-expr ...))
(fn fcollect* [iter-tbl value-expr ...]
"Return a sequential table made by advancing a range as specified by
for, and evaluating an expression that returns values to be inserted
sequentially into the table. This can be thought of as a range
comprehension. If the body evaluates to nil that element is omitted.
For example,
(fcollect [i 1 10 2]
(when (not= i 3)
(* i i)))
returns
[1 25 49 81]
Supports an &into clause after the range to put results in an existing table.
Supports early termination with an &until clause."
(assert (and (sequence? iter-tbl) (< 2 (length iter-tbl)))
"expected range binding table")
(seq-collect 'for iter-tbl value-expr ...))
(fn accumulate-impl [for? iter-tbl body ...]
(assert (and (sequence? iter-tbl) (<= 4 (length iter-tbl)))
"expected initial value and iterator binding table")
(assert (not= nil body) "expected body expression")
(assert (= nil ...)
"expected exactly one body expression. Wrap multiple expressions with do")
(let [[accum-var accum-init] iter-tbl
iter (sym (if for? "for" "each"))] ; accumulate or faccumulate?
`(do
(var ,accum-var ,accum-init)
(,iter ,[(unpack iter-tbl 3)]
(set ,accum-var ,body))
,(if (list? accum-var)
(list (sym :values) (unpack accum-var))
accum-var))))
(fn accumulate* [iter-tbl body ...]
"Accumulation macro.
It takes a binding table and an expression as its arguments. In the binding
table, the first form starts out bound to the second value, which is an initial
accumulator. The rest are an iterator binding table in the format `each` takes.
It runs through the iterator in each step of which the given expression is
evaluated, and the accumulator is set to the value of the expression. It
eventually returns the final value of the accumulator.
For example,
(accumulate [total 0
_ n (pairs {:apple 2 :orange 3})]
(+ total n))
returns 5"
(accumulate-impl false iter-tbl body ...))
(fn faccumulate* [iter-tbl body ...]
"Identical to accumulate, but after the accumulator the binding table is the
same as `for` instead of `each`. Like collect to fcollect, will iterate over a
numerical range like `for` rather than an iterator."
(accumulate-impl true iter-tbl body ...))
(fn double-eval-safe? [x type]
(or (= :number type) (= :string type) (= :boolean type)
(and (sym? x) (not (multi-sym? x)))))
(fn partial* [f ...]
"Return a function with all arguments partially applied to f."
(assert f "expected a function to partially apply")
(let [bindings []
args []]
(each [_ arg (ipairs [...])]
(if (double-eval-safe? arg (type arg))
(table.insert args arg)
(let [name (gensym)]
(table.insert bindings name)
(table.insert bindings arg)
(table.insert args name))))
(let [body (list f (unpack args))]
(table.insert body _VARARG)
;; only use the extra let if we need double-eval protection
(if (= 0 (length bindings))
`(fn [,_VARARG] ,body)
`(let ,bindings
(fn [,_VARARG] ,body))))))
(fn pick-args* [n f]
"Create a function of arity n that applies its arguments to f.
For example,
(pick-args 2 func)
expands to
(fn [_0_ _1_] (func _0_ _1_))"
(if (and _G.io _G.io.stderr)
(_G.io.stderr:write
"-- WARNING: pick-args is deprecated and will be removed in the future.\n"))
(assert (and (= (type n) :number) (= n (math.floor n)) (<= 0 n))
(.. "Expected n to be an integer literal >= 0, got " (tostring n)))
(let [bindings []]
(for [i 1 n]
(tset bindings i (gensym)))
`(fn ,bindings
(,f ,(unpack bindings)))))
(fn pick-values* [n ...]
"Evaluate to exactly n values.
For example,
(pick-values 2 ...)
expands to
(let [(_0_ _1_) ...]
(values _0_ _1_))"
(assert (and (= :number (type n)) (<= 0 n) (= n (math.floor n)))
(.. "Expected n to be an integer >= 0, got " (tostring n)))
(let [let-syms (list)
let-values (if (= 1 (select "#" ...)) ... `(values ,...))]
(for [i 1 n]
(table.insert let-syms (gensym)))
(if (= n 0) `(values)
`(let [,let-syms ,let-values]
(values ,(unpack let-syms))))))
(fn lambda* [...]
"Function literal with nil-checked arguments.
Like `fn`, but will throw an exception if a declared argument is passed in as
nil, unless that argument's name begins with a question mark."
(let [args [...]
args-len (length args)
has-internal-name? (sym? (. args 1))
arglist (if has-internal-name? (. args 2) (. args 1))
metadata-position (if has-internal-name? 3 2)
has-metadata? (and (< metadata-position args-len)
(or (= :string (type (. args metadata-position)))
(utils.kv-table? (. args metadata-position))))
arity-check-position (- 4 (if has-internal-name? 0 1)
(if has-metadata? 0 1))
empty-body? (< args-len arity-check-position)]
(fn check! [a]
(if (table? a)
(each [_ a (pairs a)] (check! a))
(let [as (tostring a)]
(and (not (as:match "^?")) (not= as "&") (not= as "_")
(not= as "...") (not= as "&as")))
(table.insert args arity-check-position
`(_G.assert (not= nil ,a)
,(: "Missing argument %s on %s:%s" :format
(tostring a)
(or a.filename :unknown)
(or a.line "?"))))))
(assert (= :table (type arglist)) "expected arg list")
(each [_ a (ipairs arglist)] (check! a))
(if empty-body?
(table.insert args (sym :nil)))
`(fn ,(unpack args))))
(fn macro* [name ...]
"Define a single macro."
(assert (sym? name) "expected symbol for macro name")
(local args [...])
`(macros {,(tostring name) (fn ,(unpack args))}))
(fn macrodebug* [form return?]
"Print the resulting form after performing macroexpansion.
With a second argument, returns expanded form as a string instead of printing."
(let [handle (if return? `do `print)]
`(,handle ,(view (macroexpand form _SCOPE)))))
(fn import-macros* [binding1 module-name1 ...]
"Bind a table of macros from each macro module according to a binding form.
Each binding form can be either a symbol or a k/v destructuring table.
Example:
(import-macros mymacros :my-macros ; bind to symbol
{:macro1 alias : macro2} :proj.macros) ; import by name"
(assert (and binding1 module-name1 (= 0 (% (select "#" ...) 2)))
"expected even number of binding/modulename pairs")
(for [i 1 (select "#" binding1 module-name1 ...) 2]
;; delegate the actual loading of the macros to the require-macros
;; special which already knows how to set up the compiler env and stuff.
;; this is weird because require-macros is deprecated but it works.
(let [(binding modname) (select i binding1 module-name1 ...)
scope (get-scope)
;; if the module-name is an expression (and not just a string) we
;; patch our expression to have the correct source filename so
;; require-macros can pass it down when resolving the module-name.
expr `(import-macros ,modname)
filename (if (list? modname) (. modname 1 :filename) :unknown)
_ (tset expr :filename filename)
macros* (_SPECIALS.require-macros expr scope {} binding)]
(if (sym? binding)
;; bind whole table of macros to table bound to symbol
(tset scope.macros (. binding 1) macros*)
;; 1-level table destructuring for importing individual macros
(table? binding)
(each [macro-name [import-key] (pairs binding)]
(assert (= :function (type (. macros* macro-name)))
(.. "macro " macro-name " not found in module "
(tostring modname)))
(tset scope.macros import-key (. macros* macro-name))))))
nil)
{:-> ->*
:->> ->>*
:-?> -?>*
:-?>> -?>>*
:?. ?dot
:doto doto*
:when when*
:with-open with-open*
:collect collect*
:icollect icollect*
:fcollect fcollect*
:accumulate accumulate*
:faccumulate faccumulate*
:partial partial*
:lambda lambda*
:λ lambda*
:pick-args pick-args*
:pick-values pick-values*
:macro macro*
:macrodebug macrodebug*
:import-macros import-macros*}
]===], {env = env, filename = "src/fennel/macros.fnl", moduleName = module_name, scope = compiler.scopes.compiler, useMetadata = true})
local _0 = nil
for k, v in pairs(built_ins) do
compiler.scopes.global.macros[k] = v
end
_0 = nil
local match_macros = eval([===[;;; Pattern matching
;; This is separated out so we can use the "core" macros during the
;; implementation of pattern matching.
(fn copy [t] (collect [k v (pairs t)] k v))
(fn with [opts k]
(doto (copy opts) (tset k true)))
(fn without [opts k]
(doto (copy opts) (tset k nil)))
(fn case-values [vals pattern unifications case-pattern opts]
(let [condition `(and)
bindings []]
(each [i pat (ipairs pattern)]
(let [(subcondition subbindings) (case-pattern [(. vals i)] pat
unifications (without opts :multival?))]
(table.insert condition subcondition)
(icollect [_ b (ipairs subbindings) &into bindings] b)))
(values condition bindings)))
(fn case-table [val pattern unifications case-pattern opts]
(let [condition `(and (= (_G.type ,val) :table))
bindings []]
(each [k pat (pairs pattern)]
(if (sym? pat :&)
(let [rest-pat (. pattern (+ k 1))
rest-val `(select ,k ((or table.unpack _G.unpack) ,val))
subcondition (case-table `(pick-values 1 ,rest-val)
rest-pat unifications case-pattern
(without opts :multival?))]
(if (not (sym? rest-pat))
(table.insert condition subcondition))
(assert (= nil (. pattern (+ k 2)))
"expected & rest argument before last parameter")
(table.insert bindings rest-pat)
(table.insert bindings [rest-val]))
(sym? k :&as)
(do
(table.insert bindings pat)
(table.insert bindings val))
(and (= :number (type k)) (sym? pat :&as))
(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 (sym? (. pattern (- k 1)) :&as))
(not (sym? (. pattern (- k 1)) :&))))
(let [subval `(. ,val ,k)
(subcondition subbindings) (case-pattern [subval] pat
unifications
(without opts :multival?))]
(table.insert condition subcondition)
(icollect [_ b (ipairs subbindings) &into bindings] b))))
(values condition bindings)))
(fn case-guard [vals condition guards unifications case-pattern opts]
(if (= 0 (length guards))
(case-pattern vals condition unifications opts)
(let [(pcondition bindings) (case-pattern vals condition unifications opts)
condition `(and ,(unpack guards))]
(values `(and ,pcondition
(let ,bindings
,condition)) bindings))))
(fn symbols-in-pattern [pattern]
"gives the set of symbols inside a pattern"
(if (list? pattern)
(if (or (sym? (. pattern 1) :where)
(sym? (. pattern 1) :=))
(symbols-in-pattern (. pattern 2))
(sym? (. pattern 2) :?)
(symbols-in-pattern (. pattern 1))
(let [result {}]
(each [_ child-pattern (ipairs pattern)]
(collect [name symbol (pairs (symbols-in-pattern child-pattern)) &into result]
name symbol))
result))
(sym? pattern)
(if (and (not (sym? pattern :or))
(not (sym? pattern :nil)))
{(tostring pattern) pattern}
{})
(= (type pattern) :table)
(let [result {}]
(each [key-pattern value-pattern (pairs pattern)]
(collect [name symbol (pairs (symbols-in-pattern key-pattern)) &into result]
name symbol)
(collect [name symbol (pairs (symbols-in-pattern value-pattern)) &into result]
name symbol))
result)
{}))
(fn symbols-in-every-pattern [pattern-list infer-unification?]
"gives a list of symbols that are present in every pattern in the list"
(let [?symbols (accumulate [?symbols nil
_ pattern (ipairs pattern-list)]
(let [in-pattern (symbols-in-pattern pattern)]
(if ?symbols
(do
(each [name symbol (pairs ?symbols)]
(when (not (. in-pattern name))
(tset ?symbols name nil)))
?symbols)
in-pattern)))]
(icollect [_ symbol (pairs (or ?symbols {}))]
(if (not (and infer-unification?
(in-scope? symbol)))
symbol))))
(fn case-or [vals pattern guards unifications case-pattern opts]
(let [pattern [(unpack pattern 2)]
bindings (symbols-in-every-pattern pattern opts.infer-unification?)] ;; TODO opts.infer-unification instead of opts.unification?
(if (= 0 (length bindings))
;; no bindings special case generates simple code
(let [condition
(icollect [i subpattern (ipairs pattern) &into `(or)]
(let [(subcondition subbindings) (case-pattern vals subpattern unifications opts)]
subcondition))]
(values
(if (= 0 (length guards))
condition
`(and ,condition ,(unpack guards)))
[]))
;; case with bindings is handled specially, and returns three values instead of two
(let [matched? (gensym :matched?)
bindings-mangled (icollect [_ binding (ipairs bindings)]
(gensym (tostring binding)))
pre-bindings `(if)]
(each [i subpattern (ipairs pattern)]
(let [(subcondition subbindings) (case-guard vals subpattern guards {} case-pattern opts)]
(table.insert pre-bindings subcondition)
(table.insert pre-bindings `(let ,subbindings
(values true ,(unpack bindings))))))
(values matched?
[`(,(unpack bindings)) `(values ,(unpack bindings-mangled))]
[`(,matched? ,(unpack bindings-mangled)) pre-bindings])))))
(fn case-pattern [vals pattern unifications opts top-level?]
"Take the AST of values and a single pattern and returns a condition
to determine if it matches as well as a list of bindings to
introduce for the duration of the body if it does match."
;; This function returns the following values (multival):
;; a "condition", which is an expression that determines whether the
;; pattern should match,
;; a "bindings", which bind all of the symbols used in a pattern
;; an optional "pre-bindings", which is a list of bindings that happen
;; before the condition and bindings are evaluated. These should only
;; come from a (case-or). In this case there should be no recursion:
;; the call stack should be case-condition > case-pattern > case-or
;;
;; Here are the expected flags in the opts table:
;; :infer-unification? boolean - if the pattern should guess when to unify (ie, match -> true, case -> false)
;; :multival? boolean - if the pattern can contain multivals (in order to disallow patterns like [(1 2)])
;; :in-where? boolean - if the pattern is surrounded by (where) (where opts into more pattern features)
;; :legacy-guard-allowed? boolean - if the pattern should allow `(a ? b) patterns
;; we have to assume we're matching against multiple values here until we
;; know we're either in a multi-valued clause (in which case we know the #
;; of vals) or we're not, in which case we only care about the first one.
(let [[val] vals]
(if (and (sym? pattern)
(or (sym? pattern :nil)
(and opts.infer-unification?
(in-scope? pattern)
(not (sym? pattern :_)))
(and opts.infer-unification?
(multi-sym? pattern)
(in-scope? (. (multi-sym? pattern) 1)))))
(values `(= ,val ,pattern) [])
;; unify a local we've seen already
(and (sym? pattern) (. unifications (tostring pattern)))
(values `(= ,(. unifications (tostring pattern)) ,val) [])
;; bind a fresh local
(sym? pattern)
(let [wildcard? (: (tostring pattern) :find "^_")]
(if (not wildcard?) (tset unifications (tostring pattern) val))
(values (if (or wildcard? (string.find (tostring pattern) "^?")) true
`(not= ,(sym :nil) ,val)) [pattern val]))
;; opt-in unify with (=)
(and (list? pattern)
(sym? (. pattern 1) :=)
(sym? (. pattern 2)))
(let [bind (. pattern 2)]
(assert-compile (= 2 (length pattern)) "(=) should take only one argument" pattern)
(assert-compile (not opts.infer-unification?) "(=) cannot be used inside of match" pattern)
(assert-compile opts.in-where? "(=) must be used in (where) patterns" pattern)
(assert-compile (and (sym? bind) (not (sym? bind :nil)) "= has to bind to a symbol" bind))
(values `(= ,val ,bind) []))
;; where-or clause
(and (list? pattern) (sym? (. pattern 1) :where) (list? (. pattern 2)) (sym? (. pattern 2 1) :or))
(do
(assert-compile top-level? "can't nest (where) pattern" pattern)
(case-or vals (. pattern 2) [(unpack pattern 3)] unifications case-pattern (with opts :in-where?)))
;; where clause
(and (list? pattern) (sym? (. pattern 1) :where))
(do
(assert-compile top-level? "can't nest (where) pattern" pattern)
(case-guard vals (. pattern 2) [(unpack pattern 3)] unifications case-pattern (with opts :in-where?)))
;; or clause (not allowed on its own)
(and (list? pattern) (sym? (. pattern 1) :or))
(do
(assert-compile top-level? "can't nest (or) pattern" pattern)
;; This assertion can be removed to make patterns more permissive
(assert-compile false "(or) must be used in (where) patterns" pattern)
(case-or vals pattern [] unifications case-pattern opts))
;; guard clause
(and (list? pattern) (sym? (. pattern 2) :?))
(do
(assert-compile opts.legacy-guard-allowed? "legacy guard clause not supported in case" pattern)
(case-guard vals (. pattern 1) [(unpack pattern 3)] unifications case-pattern opts))
;; multi-valued patterns (represented as lists)
(list? pattern)
(do
(assert-compile opts.multival? "can't nest multi-value destructuring" pattern)
(case-values vals pattern unifications case-pattern opts))
;; table patterns
(= (type pattern) :table)
(case-table val pattern unifications case-pattern opts)
;; literal value
(values `(= ,val ,pattern) []))))
(fn add-pre-bindings [out pre-bindings]
"Decide when to switch from the current `if` AST to a new one"
(if pre-bindings
;; `out` no longer needs to grow.
;; Instead, a new tail `if` AST is introduced, which is where the rest of
;; the clauses will get appended. This way, all future clauses have the
;; pre-bindings in scope.
(let [tail `(if)]
(table.insert out true)
(table.insert out `(let ,pre-bindings ,tail))
tail)
;; otherwise, keep growing the current `if` AST.
out))
(fn case-condition [vals clauses match?]
"Construct the actual `if` AST for the given match values and clauses."
;; root is the original `if` AST.
;; out is the `if` AST that is currently being grown.
(let [root `(if)]
(faccumulate [out root
i 1 (length clauses) 2]
(let [pattern (. clauses i)
body (. clauses (+ i 1))
(condition bindings pre-bindings) (case-pattern vals pattern {}
{:multival? true
:infer-unification? match?
:legacy-guard-allowed? match?}
true)
out (add-pre-bindings out pre-bindings)]
;; grow the `if` AST by one extra condition
(table.insert out condition)
(table.insert out `(let ,bindings
,body))
out))
root))
(fn count-case-multival [pattern]
"Identify the amount of multival values that a pattern requires."
(if (and (list? pattern) (sym? (. pattern 2) :?))
(count-case-multival (. pattern 1))
(and (list? pattern) (sym? (. pattern 1) :where))
(count-case-multival (. pattern 2))
(and (list? pattern) (sym? (. pattern 1) :or))
(accumulate [longest 0
_ child-pattern (ipairs pattern)]
(math.max longest (count-case-multival child-pattern)))
(list? pattern)
(length pattern)
1))
(fn case-count-syms [clauses]
"Find the length of the largest multi-valued clause"
(let [patterns (fcollect [i 1 (length clauses) 2]
(. clauses i))]
(accumulate [longest 0
_ pattern (ipairs patterns)]
(math.max longest (count-case-multival pattern)))))
(fn case-impl [match? val ...]
"The shared implementation of case and match."
(assert (not= val nil) "missing subject")
(assert (= 0 (math.fmod (select :# ...) 2))
"expected even number of pattern/body pairs")
(assert (not= 0 (select :# ...))
"expected at least one pattern/body pair")
(let [clauses [...]
vals-count (case-count-syms clauses)
skips-multiple-eval-protection? (and (= vals-count 1) (sym? val) (not (multi-sym? val)))]
(if skips-multiple-eval-protection?
(case-condition (list val) clauses match?)
;; protect against multiple evaluation of the value, bind against as
;; many values as we ever match against in the clauses.
(let [vals (fcollect [i 1 vals-count &into (list)] (gensym))]
(list `let [vals val] (case-condition vals clauses match?))))))
(fn case* [val ...]
"Perform pattern matching on val. See reference for details.
Syntax:
(case data-expression
pattern body
(where pattern guards*) body
(or pattern patterns*) body
(where (or pattern patterns*) guards*) body
;; legacy:
(pattern ? guards*) body)"
(case-impl false val ...))
(fn match* [val ...]
"Perform pattern matching on val, automatically unifying on variables in
local scope. See reference for details.
Syntax:
(match data-expression
pattern body
(where pattern guards*) body
(or pattern patterns*) body
(where (or pattern patterns*) guards*) body
;; legacy:
(pattern ? guards*) body)"
(case-impl true val ...))
(fn case-try-step [how expr else pattern body ...]
(if (= nil pattern body)
expr
;; unlike regular match, we can't know how many values the value
;; might evaluate to, so we have to capture them all in ... via IIFE
;; to avoid double-evaluation.
`((fn [...]
(,how ...
,pattern ,(case-try-step how body else ...)
,(unpack else)))
,expr)))
(fn case-try-impl [how expr pattern body ...]
(let [clauses [pattern body ...]
last (. clauses (length clauses))
catch (if (sym? (and (= :table (type last)) (. last 1)) :catch)
(let [[_ & e] (table.remove clauses)] e) ; remove `catch sym
[`_# `...])]
(assert (= 0 (math.fmod (length clauses) 2))
"expected every pattern to have a body")
(assert (= 0 (math.fmod (length catch) 2))
"expected every catch pattern to have a body")
(case-try-step how expr catch (unpack clauses))))
(fn case-try* [expr pattern body ...]
"Perform chained pattern matching for a sequence of steps which might fail.
The values from the initial expression are matched against the first pattern.
If they match, the first body is evaluated and its values are matched against
the second pattern, etc.
If there is a (catch pat1 body1 pat2 body2 ...) form at the end, any mismatch
from the steps will be tried against these patterns in sequence as a fallback
just like a normal match. If there is no catch, the mismatched values will be
returned as the value of the entire expression."
(case-try-impl `case expr pattern body ...))
(fn match-try* [expr pattern body ...]
"Perform chained pattern matching for a sequence of steps which might fail.
The values from the initial expression are matched against the first pattern.
If they match, the first body is evaluated and its values are matched against
the second pattern, etc.
If there is a (catch pat1 body1 pat2 body2 ...) form at the end, any mismatch
from the steps will be tried against these patterns in sequence as a fallback
just like a normal match. If there is no catch, the mismatched values will be
returned as the value of the entire expression."
(case-try-impl `match expr pattern body ...))
{:case case*
:case-try case-try*
:match match*
:match-try match-try*}
]===], {allowedGlobals = false, env = env, filename = "src/fennel/match.fnl", moduleName = module_name, scope = compiler.scopes.compiler, useMetadata = true})
for k, v in pairs(match_macros) do
compiler.scopes.global.macros[k] = v
end
package.preload[module_name] = nil
end
return mod
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