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 _604_() if (0 < parser_state["stack-size"]) then return ".." else return ">> " end end io.write(_604_()) 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 _606_() local _605_0 = errtype if (_605_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 (_605_0 == "Runtime") then return (compiler.traceback(tostring(err), 4) .. "\n") else local _ = _605_0 return ("%s error: %s\n"):format(errtype, tostring(err)) end end return io.write(_606_()) 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 _612_() if next(saves) then return (table.concat(saves, " ") .. gap) else return "" end end local function _615_() local _613_0, _614_0 = lua_source:match("^(.*)[\n ](return .*)$") if ((nil ~= _613_0) and (nil ~= _614_0)) then local body = _613_0 local _return = _614_0 return (body .. gap .. table.concat(binds, " ") .. gap .. _return) else local _ = _613_0 return lua_source end end return (_612_() .. _615_()) 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 _617_() if scope_first_3f then return scope.manglings else return tbl end end for k, is_mangled in utils.allpairs(_617_()) 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 _626_ 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 _626_ = tbl_17_ end return table.concat(_626_, "\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 _628_0, _629_0 = pcall(specials["load-code"]("return require(...)", env), module_name) if ((_628_0 == true) and (nil ~= _629_0)) then local old = _629_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 ((_628_0 == false) and (nil ~= _629_0)) then local msg = _629_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 _634_() local _633_0 = msg:gsub("\n.*", "") return _633_0 end return on_error("Runtime", _634_()) end end end local function run_command(read, on_error, f) local _637_0, _638_0, _639_0 = pcall(read) if ((_637_0 == true) and (_638_0 == true) and (nil ~= _639_0)) then local val = _639_0 local _640_0, _641_0 = pcall(f, val) if ((_640_0 == false) and (nil ~= _641_0)) then local msg = _641_0 return on_error("Runtime", msg) end elseif (_637_0 == false) then return on_error("Parse", "Couldn't parse input.") end end commands.reload = function(env, read, on_values, on_error) local function _644_(_241) return reload(tostring(_241), env, on_values, on_error) end return run_command(read, on_error, _644_) 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 _645_() return on_values(completer(env, scope, table.concat(chars):gsub(",complete +", ""):sub(1, -2))) end return run_command(read, on_error, _645_) 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 _646_0 = type(subtbl) if (_646_0 == "function") then if ((prefix .. name)):match(pattern) then table.insert(names, (prefix .. name)) end elseif (_646_0 == "table") then if not seen[subtbl] then local _648_ do seen[subtbl] = true _648_ = seen end apropos_2a(pattern, subtbl, (prefix .. name:gsub("%.", "/") .. "."), _648_, 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 _653_(_241) return on_values(apropos(tostring(_241))) end return run_command(read, on_error, _653_) 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 _656_ do local _655_0 = path0:gsub("%/", ".") _656_ = _655_0 end tgt = tgt[_656_] 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 _657_0 = (compiler.metadata):get(tgt, "fnl/docstring") if (nil ~= _657_0) then local docstr = _657_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 _661_(_241) return on_values(apropos_doc(tostring(_241))) end return run_command(read, on_error, _661_) 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 _663_(_241) return apropos_show_docs(on_values, tostring(_241)) end return run_command(read, on_error, _663_) 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, _664_0, scope) local _665_ = _664_0 local env = _665_ local ___replLocals___ = _665_["___replLocals___"] local e = nil local function _666_(_241, _242) return (___replLocals___[scope.unmanglings[_242]] or env[_242]) end e = setmetatable({}, {__index = _666_}) local function _667_(...) local _668_0, _669_0 = ... if ((_668_0 == true) and (nil ~= _669_0)) then local code = _669_0 local function _670_(...) local _671_0, _672_0 = ... if ((_671_0 == true) and (nil ~= _672_0)) then local val = _672_0 return val else local _ = _671_0 return nil end end return _670_(pcall(specials["load-code"](code, e))) else local _ = _668_0 return nil end end return _667_(pcall(compiler["compile-string"], tostring(identifier), {scope = scope})) end commands.find = function(env, read, on_values, on_error, scope) local function _675_(_241) local _676_0 = nil do local _677_0 = utils["sym?"](_241) if (nil ~= _677_0) then local _678_0 = resolve(_677_0, env, scope) if (nil ~= _678_0) then _676_0 = debug.getinfo(_678_0) else _676_0 = _678_0 end else _676_0 = _677_0 end end if ((_G.type(_676_0) == "table") and (nil ~= _676_0.linedefined) and (nil ~= _676_0.short_src) and (nil ~= _676_0.source) and (_676_0.what == "Lua")) then local line = _676_0.linedefined local src = _676_0.short_src local source = _676_0.source local fnlsrc = nil do local _681_0 = compiler.sourcemap if (nil ~= _681_0) then _681_0 = _681_0[source] end if (nil ~= _681_0) then _681_0 = _681_0[line] end if (nil ~= _681_0) then _681_0 = _681_0[2] end fnlsrc = _681_0 end return on_values({string.format("%s:%s", src, (fnlsrc or line))}) elseif (_676_0 == nil) then return on_error("Repl", "Unknown value") else local _ = _676_0 return on_error("Repl", "No source info") end end return run_command(read, on_error, _675_) 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 _686_(_241) local name = tostring(_241) local path = (utils["multi-sym?"](name) or {name}) local ok_3f, target = nil, nil local function _687_() return (utils["get-in"](scope.specials, path) or utils["get-in"](scope.macros, path) or resolve(name, env, scope)) end ok_3f, target = pcall(_687_) 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, _686_) 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 _689_(_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, _689_) end do end (compiler.metadata):set(commands.compile, "fnl/docstring", "compiles the expression into lua and prints the result.") local function load_plugin_commands(plugins) for _, plugin in ipairs((plugins or {})) do for name, f in pairs(plugin) do local _691_0 = name:match("^repl%-command%-(.*)") if (nil ~= _691_0) then local cmd_name = _691_0 commands[cmd_name] = (commands[cmd_name] or 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 _693_0 = commands[command_name] if (nil ~= _693_0) then local command = _693_0 command(env, read, on_values, on_error, scope, chars) else local _ = _693_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 _702_ = utils.copy(_3foptions) local opts = _702_ local _3ffennelrc = _702_["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 _704_(_241) return callbacks.readChunk(_241) end byte_stream, clear_stream = parser.granulate(_704_) local chars = {} local read, reset = nil, nil local function _705_(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(_705_) 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 _709_() local _708_0 = opts.scope local function _710_(...) return completer(env, _708_0, ...) end return _710_ end opts.registerCompleter(_709_()) 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 _714_0, _715_0 = nil, nil local function _716_() opts["source"] = src_string return opts end _714_0, _715_0 = pcall(compiler.compile, x, _716_()) if ((_714_0 == false) and (nil ~= _715_0)) then local msg = _715_0 clear_stream() callbacks.onError("Compile", msg) elseif ((_714_0 == true) and (nil ~= _715_0)) then local src = _715_0 local src0 = nil if save_locals_3f then src0 = splice_save_locals(env, src, opts.scope) else src0 = src end local _718_0, _719_0 = pcall(specials["load-code"], src0, env) if ((_718_0 == false) and (nil ~= _719_0)) then local msg = _719_0 clear_stream() callbacks.onError("Lua Compile", msg, src0) elseif (true and (nil ~= _719_0)) then local _1 = _718_0 local chunk = _719_0 local function _720_() return print_values(chunk()) end local function _721_(...) return callbacks.onError("Runtime", ...) end xpcall(_720_, _721_) 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 _415_(_, key) if utils["string?"](key) then return env[compiler["global-unmangling"](key)] else return env[key] end end local function _417_(_, 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 _419_() local function putenv(k, v) local _420_ if utils["string?"](k) then _420_ = compiler["global-unmangling"](k) else _420_ = k end return _420_, v end return next, utils.kvmap(env, putenv), nil end return setmetatable({}, {__index = _415_, __newindex = _417_, __pairs = _419_}) end local function current_global_names(_3fenv) local mt = nil do local _422_0 = getmetatable(_3fenv) if ((_G.type(_422_0) == "table") and (nil ~= _422_0.__pairs)) then local mtpairs = _422_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 (_422_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 _425_0, _426_0 = rawget(_G, "setfenv"), rawget(_G, "loadstring") if ((nil ~= _425_0) and (nil ~= _426_0)) then local setfenv = _425_0 local loadstring = _426_0 local f = assert(loadstring(code, _3ffilename)) setfenv(f, env) return f else local _ = _425_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 "#")):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 {"#"}), " ") local _428_ if (0 < #arglist) then _428_ = " " else _428_ = "" end return string.format("(%s%s%s)\n %s", name, _428_, 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 _439_ = compiler.compile1(v, scope, chunk, opts) local _440_ = _439_[1] local v0 = _440_[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 _441_() if ("string" == type(v)) then return view(v, view_opts) else return compile_value(v) end end table.insert(meta, _441_()) 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 _442_(_241) return view(view(_241, view_opts)) end table.insert(meta, ("{" .. table.concat(utils.map(arg_list, _442_), ", ") .. "}")) 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 _445_ if not multi then _445_ = compiler["declare-local"](fn_name, {}, scope, ast) else _445_ = compiler["symbol-to-expression"](fn_name, scope)[1] end return _445_, 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 _448_ if local_3f then _448_ = "local function %s(%s)" else _448_ = "%s = function(%s)" end compiler.emit(parent, string.format(_448_, 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 _451_(_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 _453_(_241, _242) _241["fnl/docstring"] = _242 return _241 end return maybe_metadata(ast, utils["kv-table?"], _451_, maybe_metadata(ast, utils["string?"], _453_, {["fnl/arglist"] = arg_list}, index)) end SPECIALS.fn = function(ast, scope, parent) local f_scope = nil do local _454_0 = compiler["make-scope"](scope) _454_0["vararg"] = false f_scope = _454_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 _459_ do local _458_0 = utils["sym?"](ast[2]) if (nil ~= _458_0) then _459_ = tostring(_458_0) else _459_ = _458_0 end end if ("nil" ~= _459_) then table.insert(parent, {ast = ast, leaf = tostring(ast[2])}) end local _463_ do local _462_0 = utils["sym?"](ast[3]) if (nil ~= _462_0) then _463_ = tostring(_462_0) else _463_ = _462_0 end end if ("nil" ~= _463_) 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 _466_ = compiler.compile1(ast[2], scope, parent, {nval = 1}) local lhs = _466_[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 _467_ = compiler.compile1(index, scope, parent, {nval = 1}) local index0 = _467_[1] table.insert(indices, ("[" .. tostring(index0) .. "]")) end end if (tostring(lhs):find("[{\"0-9]") or ("nil" == tostring(lhs))) then return ("(" .. tostring(lhs) .. ")" .. table.concat(indices)) else return (tostring(lhs) .. table.concat(indices)) end end end SPECIALS["."] = dot doc_special(".", {"tbl", "key1", "..."}, "Look up key1 in tbl table. If more args are provided, do a nested lookup.") SPECIALS.global = function(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceglobal = true, nomulti = true, symtype = "global"}) return nil end doc_special("global", {"name", "val"}, "Set name as a global with val.") SPECIALS.set = function(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {noundef = true, symtype = "set"}) return nil end doc_special("set", {"name", "val"}, "Set a local variable to a new value. Only works on locals using var.") local function set_forcibly_21_2a(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceset = true, symtype = "set"}) return nil end SPECIALS["set-forcibly!"] = set_forcibly_21_2a local function local_2a(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, nomulti = true, symtype = "local"}) return nil end SPECIALS["local"] = local_2a doc_special("local", {"name", "val"}, "Introduce new top-level immutable local.") SPECIALS.var = function(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, isvar = true, nomulti = true, symtype = "var"}) return nil end doc_special("var", {"name", "val"}, "Introduce new mutable local.") local function kv_3f(t) local _471_ 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 _471_ = tbl_17_ end return _471_[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 _476_() local _475_0 = get_prev_line(parent) if (nil ~= _475_0) then local prev_line = _475_0 return prev_line:match("%)$") end end return (rootstr:match("^{") or rootstr:match("^%(") or _476_()) 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 _478_ = compiler.compile1(ast[i], scope, parent, {nval = 1}) local key = _478_[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) local do_scope = compiler["make-scope"](scope) local branches = {} local wrapper, inner_tail, inner_target, target_exprs = calculate_target(scope, opts) local body_opts = {nval = opts.nval, tail = inner_tail, target = inner_target} local function compile_body(i) local chunk = {} local cscope = compiler["make-scope"](do_scope) compiler["keep-side-effects"](compiler.compile1(ast[i], cscope, chunk, body_opts), chunk, nil, ast[i]) return {chunk = chunk, scope = cscope} end if (1 == (#ast % 2)) then table.insert(ast, utils.sym("nil")) 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 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 _487_ = compiler.compile1(condition, scope, chunk, {nval = 1}) local condition_lua = _487_[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 _491_ = ast local _ = _491_[1] local _0 = _491_[2] local method_string = _491_[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 _493_ = compiler.compile1(ast[2], scope, parent, {nval = 1}) local target = _493_[1] local args = {} for i = 4, #ast do local subexprs = nil local _494_ if (i ~= #ast) then _494_ = 1 else _494_ = nil end subexprs = compiler.compile1(ast[i], scope, parent, {nval = _494_}) 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 _497_ 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 _497_ = tbl_17_ end c = table.concat(_497_, " "):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 _502_0 = compiler["make-scope"](scope) _502_0["vararg"] = false _502_0["hashfn"] = true f_scope = _502_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, _507_0) local _508_ = _507_0 local mac = _508_["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 _511_0 = #operands if (_511_0 == 0) then local _512_ do compiler.assert(zero_arity, "Expected more than 0 arguments", ast) _512_ = zero_arity end return utils.expr(_512_, "literal") elseif (_511_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 _ = _511_0 return ("(" .. table.concat(operands, padded_op) .. ")") end end local function define_arithmetic_special(name, zero_arity, unary_prefix, _3flua_name) local _516_ do local _515_0 = (_3flua_name or name) local function _517_(...) return arithmetic_special(_515_0, zero_arity, unary_prefix, ...) end _516_ = _517_ end SPECIALS[name] = _516_ 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 _518_ if (i ~= len) then _518_ = 1 else _518_ = nil end subexprs = compiler.compile1(ast[i], scope, parent, {nval = _518_}) 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 _524_(...) return bitop_special(native, name, zero_arity, unary_prefix, ...) end SPECIALS[name] = _524_ 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 _525_ = compiler.compile1(ast[2], scope, parent, {nval = 1}) local value = _525_[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, _527_0, scope, parent) local _528_ = _527_0 local _ = _528_[1] local lhs_ast = _528_[2] local rhs_ast = _528_[3] local _529_ = compiler.compile1(lhs_ast, scope, parent, {nval = 1}) local lhs = _529_[1] local _530_ = compiler.compile1(rhs_ast, scope, parent, {nval = 1}) local rhs = _530_[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 _537_ do local _536_0 = rawget(_G, "utf8") if (nil ~= _536_0) then _537_ = utils.copy(_536_0) else _537_ = _536_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 = _537_, xpcall = xpcall} end local function combined_mt_pairs(env) local combined = {} local _539_ = getmetatable(env) local __index = _539_["__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 _541_0 = (_3fopts or utils.root.options) if ((_G.type(_541_0) == "table") and (_541_0["compiler-env"] == "strict")) then provided = safe_compiler_env() elseif ((_G.type(_541_0) == "table") and (nil ~= _541_0.compilerEnv)) then local compilerEnv = _541_0.compilerEnv provided = compilerEnv elseif ((_G.type(_541_0) == "table") and (nil ~= _541_0["compiler-env"])) then local compiler_env = _541_0["compiler-env"] provided = compiler_env else local _ = _541_0 provided = safe_compiler_env(false) end end local env = nil local function _543_() return compiler.scopes.macro end local function _544_(symbol) compiler.assert(compiler.scopes.macro, "must call from macro", ast) return compiler.scopes.macro.manglings[tostring(symbol)] end local function _545_(base) return utils.sym(compiler.gensym((compiler.scopes.macro or scope), base)) end local function _546_(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"] = _543_, ["in-scope?"] = _544_, ["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 = _545_, list = utils.list, macroexpand = _546_, 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 _547_(...) 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 _549_ = _547_(...) local dirsep = _549_[1] local pathsep = _549_[2] local pathmark = _549_[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 _550_0 = (io.open(filename) or io.open(filename2)) if (nil ~= _550_0) then local file = _550_0 file:close() return filename else local _ = _550_0 return nil, ("no file '" .. filename .. "'") end end local function find_in_path(start, _3ftried_paths) local _552_0 = fullpath:match(pattern, start) if (nil ~= _552_0) then local path = _552_0 local _553_0, _554_0 = try_path(path) if (nil ~= _553_0) then local filename = _553_0 return filename elseif ((_553_0 == nil) and (nil ~= _554_0)) then local error = _554_0 local function _556_() local _555_0 = (_3ftried_paths or {}) table.insert(_555_0, error) return _555_0 end return find_in_path((start + #path + 1), _556_()) end else local _ = _552_0 local function _558_() 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, _558_() end end return find_in_path(1) end local function make_searcher(_3foptions) local function _561_(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 _562_0, _563_0 = search_module(module_name) if (nil ~= _562_0) then local filename = _562_0 local function _564_(...) return utils["fennel-module"].dofile(filename, opts, ...) end return _564_, filename elseif ((_562_0 == nil) and (nil ~= _563_0)) then local error = _563_0 return error end end return _561_ 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 _566_0 = utils.copy(utils.root.options) _566_0["module-name"] = module_name _566_0["env"] = "_COMPILER" _566_0["requireAsInclude"] = false _566_0["allowedGlobals"] = nil opts = _566_0 end local _567_0 = search_module(module_name, utils["fennel-module"]["macro-path"]) if (nil ~= _567_0) then local filename = _567_0 local _568_ if (opts["compiler-env"] == _G) then local function _569_(...) return dofile_with_searcher(fennel_macro_searcher, filename, opts, ...) end _568_ = _569_ else local function _570_(...) return utils["fennel-module"].dofile(filename, opts, ...) end _568_ = _570_ end return _568_, filename end end local function lua_macro_searcher(module_name) local _573_0 = search_module(module_name, package.path) if (nil ~= _573_0) then local filename = _573_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 _575_() return assert(f:read("*a")) end code = close_handlers_10_(_G.xpcall(_575_, (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 _577_0 = macro_searchers[n] if (nil ~= _577_0) then local f = _577_0 local _578_0, _579_0 = f(modname) if ((nil ~= _578_0) and true) then local loader = _578_0 local _3ffilename = _579_0 return loader, _3ffilename else local _ = _578_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 _583_(modname) local function _584_() 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 _584_()) end safe_require = _583_ 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(_585_0, _scope, _parent, opts) local _586_ = _585_0 local second = _586_[2] local filename = _586_["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, parent) end end doc_special("require-macros", {"macro-module-name"}, "Load given module and use its contents as macro definitions in current scope.\nMacro module should return a table of macro functions with string keys.\nConsider using import-macros instead as it is more flexible.") local function emit_included_fennel(src, path, opts, sub_chunk) local subscope = compiler["make-scope"](utils.root.scope.parent) local forms = {} if utils.root.options.requireAsInclude then subscope.specials.require = compiler["require-include"] 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 _592_() return assert(f:read("*all")):gsub("[\13\n]*$", "") end src = close_handlers_10_(_G.xpcall(_592_, (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 _595_0, _596_0 = pcall(resolve_module_name, ast, scope, parent, opts) if ((_595_0 == true) and (nil ~= _596_0)) then local modname = _596_0 modexpr = utils.expr(string.format("%q", modname), "literal") else local _ = _595_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 _600_() local _599_0 = search_module(mod) if (nil ~= _599_0) then local fennel_path = _599_0 return include_path(ast, opts, fennel_path, mod, true) else local _0 = _599_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 _600_()) 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, parent) end doc_special("macros", {"{:macro-name-1 (fn [...] ...) ... :macro-name-N macro-body-N}"}, "Define all functions in the given table as macros local to the current scope.") SPECIALS["eval-compiler"] = function(ast, scope, parent) local old_first = ast[1] ast[1] = utils.sym("do") local val = eval_compiler_2a(ast, scope, parent) ast[1] = old_first return val end doc_special("eval-compiler", {"..."}, "Evaluate the body at compile-time. Use the macro system instead if possible.", true) 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 _260_ if parent then _260_ = ((parent.depth or 0) + 1) else _260_ = 0 end return {["gensym-base"] = setmetatable({}, {__index = (parent and parent["gensym-base"])}), autogensyms = setmetatable({}, {__index = (parent and parent.autogensyms)}), depth = _260_, 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 _263_ = (utils.root.options or {}) local error_pinpoint = _263_["error-pinpoint"] local source = _263_["source"] local unfriendly = _263_["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 _268_(_241) return ("\\" .. _241:byte()) end return string.gsub(string.gsub(string.format("%q", str), ".", serialize_subst), "[\128-\255]", _268_) end local function global_mangling(str) if utils["valid-lua-identifier?"](str) then return str else local function _269_(_241) return string.format("_%02x", _241:byte()) end return ("__fnl_global__" .. str:gsub("[^%w]", _269_)) end end local function global_unmangling(identifier) local _271_0 = string.match(identifier, "^__fnl_global__(.*)$") if (nil ~= _271_0) then local rest = _271_0 local _272_0 = nil local function _273_(_241) return string.char(tonumber(_241:sub(2), 16)) end _272_0 = string.gsub(rest, "_[%da-f][%da-f]", _273_) return _272_0 else local _ = _271_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 _277_(_241) return string.format("_%02x", _241:byte()) end mangling = string.gsub(string.gsub(raw, "-", "_"), "[^%w_]", _277_) 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 _281_0 = utils["multi-sym?"](base) if (nil ~= _281_0) then local parts = _281_0 return combine_auto_gensym(parts, autogensym(parts[1], scope)) else local _ = _281_0 local function _282_() local mangling = gensym(scope, base:sub(1, ( - 2)), "auto") scope.autogensyms[base] = mangling return mangling end return (scope.autogensyms[base] or _282_()) end end local function check_binding_valid(symbol, scope, ast, _3fopts) local name = tostring(symbol) local macro_3f = nil do local _284_0 = _3fopts if (nil ~= _284_0) then _284_0 = _284_0["macro?"] end macro_3f = _284_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 _296_ = utils["ast-source"](chunk.ast) local filename = _296_["filename"] local line = _296_["line"] table.insert(file_sourcemap, {filename, line}) return chunk.leaf else local tab0 = nil do local _297_0 = tab if (_297_0 == true) then tab0 = " " elseif (_297_0 == false) then tab0 = "" elseif (_297_0 == tab) then tab0 = tab elseif (_297_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 _305_(self, tgt, _3fkey) if self[tgt] then if (nil ~= _3fkey) then return self[tgt][_3fkey] else return self[tgt] end end end local function _308_(self, tgt, key, value) self[tgt] = (self[tgt] or {}) self[tgt][key] = value return tgt end local function _309_(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 = _305_, set = _308_, setall = _309_}, __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 _317_() if (result == "") then return "nil" else return result end end emit(parent, string.format("%s = %s", opts.target, _317_()), 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 _320_0 = utils["sym?"](ast[1]) if (_320_0 ~= nil) then local _321_0 = tostring(_320_0) if (_321_0 ~= nil) then macro_2a = scope.macros[_321_0] else macro_2a = _321_0 end else macro_2a = _320_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(_325_0, _index, node) local _326_ = _325_0 local byteend = _326_["byteend"] local bytestart = _326_["bytestart"] local filename = _326_["filename"] local line = _326_["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 _328_0 = parent[i] if (_328_0 == nil) then parent[i] = utils.sym("nil") end end end return index, node, parent end local function comp(f, g) local function _331_(...) return f(g(...)) end return _331_ 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 _332_0 = nil if utils["list?"](ast) then _332_0 = find_macro(ast, scope) else _332_0 = nil end if (_332_0 == false) then return ast elseif (nil ~= _332_0) then local macro_2a = _332_0 local old_scope = scopes.macro local _ = nil scopes.macro = scope _ = nil local ok, transformed = nil, nil local function _334_() return macro_2a(unpack(ast, 2)) end local function _335_() if built_in_3f(macro_2a) then return tostring else return debug.traceback end end ok, transformed = xpcall(_334_, _335_()) local function _336_(...) return propagate_trace_info(ast, ...) end utils["walk-tree"](transformed, comp(_336_, 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 _ = _332_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 _342_ if (i ~= len) then _342_ = 1 else _342_ = nil end subexprs = compile1(ast[i], scope, parent, {nval = _342_}) 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 _347_ if scope.hashfn then _347_ = "use $... in hashfn" else _347_ = "unexpected vararg" end assert_compile(scope.vararg, _347_, 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 _350_0 = string.gsub(tostring(n), ",", ".") return _350_0 end local function compile_scalar(ast, _scope, parent, opts) local serialize = nil do local _351_0 = type(ast) if (_351_0 == "nil") then serialize = tostring elseif (_351_0 == "boolean") then serialize = tostring elseif (_351_0 == "string") then serialize = serialize_string elseif (_351_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 _353_ = compile1(k, scope, parent, {nval = 1}) local compiled = _353_[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 _356_ = compile1(ast[k], scope, parent, {nval = 1}) local v0 = _356_[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 _360_ = opts0 local declaration = _360_["declaration"] local forceglobal = _360_["forceglobal"] local forceset = _360_["forceset"] local isvar = _360_["isvar"] local symtype = _360_["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 _362_ = parts local first = _362_[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 _367_(_241) if scope.manglings[_241] then return _241 else return "nil" end end inits = utils.map(lvalues, _367_) 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 _374_ 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 _374_ = tbl_17_ end exclude_str = table.concat(_374_, ", ") 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 _376_0 = nil if top_3f then _376_0 = exprs1(compile1(from, scope, parent)) else _376_0 = exprs1(rightexprs) end if (_376_0 == "") then right = "nil" elseif (nil ~= _376_0) then local right0 = _376_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 _390_ = utils.root _390_["set-reset"](_390_) 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 _395_() if info.name then return ("'" .. info.name .. "'") else return "?" end end return string.format(" %s:%d: in function %s", info.short_src, info.currentline, _395_()) 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 _399_0 = debug.getinfo(level, "Sln") if (_399_0 == nil) then done_3f = true elseif (nil ~= _399_0) then local info = _399_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 _402_(k, v) if (type(k) == "number") then return k, fv(v) else return fk(k), fv(v) end end return _402_ 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 _407_() return nil end mapped = utils.kvmap(form, entry_transform(_407_, 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 _410_ if source then _410_ = source.line else _410_ = "nil" end return string.format("setmetatable({%s}, {filename=%s, line=%s, sequence=%s})", mixed_concat(mapped, ", "), filename, _410_, "(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 _413_() if source then return source.line else return "nil" end end return string.format("setmetatable({%s}, {filename=%s, line=%s})", mixed_concat(mapped, ", "), filename, _413_()) 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 byteindex = (byteindex + 1) 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 _216_() local _215_0 = options.whitespace if (nil ~= _215_0) then _215_0 = _215_0[b] end return _215_0 end return ((b == 32) or ((9 <= b) and (b <= 13)) or _216_()) 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 _220_0 = stack[#stack] if (_220_0 == nil) then retval, done_3f, whitespace_since_dispatch = v, true, false return nil elseif ((_G.type(_220_0) == "table") and (nil ~= _220_0.prefix)) then local prefix = _220_0.prefix local source0 = nil do local _221_0 = table.remove(stack) set_source_fields(_221_0) source0 = _221_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 ~= _220_0) then local top = _220_0 whitespace_since_dispatch = false return table.insert(top, v) end end local function badend() local accum = utils.map(stack, "closer") local _223_ if (#stack == 1) then _223_ = "" else _223_ = "s" end return parse_error(string.format("expected closing delimiter%s %s", _223_, 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 _226_() table.insert(contents, string.char(b)) return contents end return parse_comment(getb(), _226_()) 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 _230_0 = comments0[index] if (nil ~= _230_0) then local existing = _230_0 return table.insert(existing, node) else local _ = _230_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 _241_0 = {state, b} if ((_G.type(_241_0) == "table") and (_241_0[1] == "base") and (_241_0[2] == 92)) then state0 = "backslash" elseif ((_G.type(_241_0) == "table") and (_241_0[1] == "base") and (_241_0[2] == 34)) then state0 = "done" elseif ((_G.type(_241_0) == "table") and (_241_0[1] == "backslash") and (_241_0[2] == 10)) then table.remove(chars, (#chars - 1)) state0 = "base" else local _ = _241_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 _245_0 = (rawget(_G, "loadstring") or load)(("return " .. formatted)) if (nil ~= _245_0) then local load_fn = _245_0 return dispatch(load_fn()) elseif (_245_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 _251_0 = tonumber(number_with_stripped_underscores) if (nil ~= _251_0) then local x = _251_0 dispatch(x) return true else local _ = _251_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(b) elseif prefixes[b] then parse_prefix(b) elseif (sym_char_3f(b) or (b == string.byte("~"))) then parse_sym(b) elseif not utils["hook-opts"]("illegal-char", options, b, getb, ungetb, dispatch) then parse_error(("invalid character: " .. string.char(b))) 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 _258_() stack, line, byteindex, col, lastb = {}, 1, 0, 0, nil return nil end return parse_stream, _258_ 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 = "1.3.1" 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 _732_(...) if opts.filename then return ("@" .. opts.filename) else return str end end loader = specials["load-code"](lua_source, env, _732_(...)) 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 _733_0 = type(v) if (_733_0 == "function") then out[k] = {["function?"] = true, ["global?"] = true} elseif (_733_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 _736_() return mod end package.preload[module_name] = _736_ _ = nil local env = nil do local _737_0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {}) _737_0["utils"] = utils _737_0["fennel"] = mod env = _737_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)) (fn collect* [iter-tbl key-expr value-expr ...] "Return a table made by running an iterator and evaluating an expression that returns key-value pairs to be inserted sequentially into the table. This can be thought of as a table comprehension. The body should provide two expressions (used as key and value) or nil, which causes it to be omitted. For example, (collect [k v (pairs {:apple \"red\" :orange \"orange\"})] (values v k)) returns {:red \"apple\" :orange \"orange\"} Supports an &into clause after the iterator to put results in an existing table. Supports early termination with an &until clause." (assert (and (sequence? iter-tbl) (<= 2 (length iter-tbl))) "expected iterator binding table") (assert (not= nil key-expr) "expected key and value expression") (assert (= nil ...) "expected 1 or 2 body expressions; wrap multiple expressions with do") (let [kv-expr (if (= nil value-expr) key-expr `(values ,key-expr ,value-expr)) (into iter) (extract-into iter-tbl)] `(let [tbl# ,into] (each ,iter (let [(k# v#) ,kv-expr] (if (and (not= k# nil) (not= v# nil)) (tset tbl# k# v#)))) tbl#))) (fn seq-collect [how iter-tbl value-expr ...] "Common part between icollect and fcollect for producing sequential tables. Iteration code only differs in using the for or each keyword, the rest of the generated code is identical." (assert (not= nil value-expr) "expected table value expression") (assert (= nil ...) "expected exactly one body expression. Wrap multiple expressions in do") (let [(into iter) (extract-into iter-tbl)] `(let [tbl# ,into] ;; believe it or not, using a var here has a pretty good performance ;; boost: https://p.hagelb.org/icollect-performance.html (var i# (length tbl#)) (,how ,iter (let [val# ,value-expr] (when (not= nil val#) (set i# (+ i# 1)) (tset tbl# i# val#)))) tbl#))) (fn icollect* [iter-tbl value-expr ...] "Return a sequential table made by running an iterator and evaluating an expression that returns values to be inserted sequentially into the table. This can be thought of as a table comprehension. If the body evaluates to nil that element is omitted. For example, (icollect [_ v (ipairs [1 2 3 4 5])] (when (not= v 3) (* v v))) returns [1 4 16 25] Supports an &into clause after the iterator to put results in an existing table. Supports early termination with an &until clause." (assert (and (sequence? iter-tbl) (<= 2 (length iter-tbl))) "expected iterator binding table") (seq-collect 'each iter-tbl value-expr ...)) (fn fcollect* [iter-tbl value-expr ...] "Return a sequential table made by advancing a range as specified by for, and evaluating an expression that returns values to be inserted sequentially into the table. This can be thought of as a range comprehension. If the body evaluates to nil that element is omitted. For example, (fcollect [i 1 10 2] (when (not= i 3) (* i i))) returns [1 25 49 81] Supports an &into clause after the range to put results in an existing table. Supports early termination with an &until clause." (assert (and (sequence? iter-tbl) (< 2 (length iter-tbl))) "expected range binding table") (seq-collect 'for iter-tbl value-expr ...)) (fn accumulate-impl [for? iter-tbl body ...] (assert (and (sequence? iter-tbl) (<= 4 (length iter-tbl))) "expected initial value and iterator binding table") (assert (not= nil body) "expected body expression") (assert (= nil ...) "expected exactly one body expression. Wrap multiple expressions with do") (let [[accum-var accum-init] iter-tbl iter (sym (if for? "for" "each"))] ; accumulate or faccumulate? `(do (var ,accum-var ,accum-init) (,iter ,[(unpack iter-tbl 3)] (set ,accum-var ,body)) ,(if (list? accum-var) (list (sym :values) (unpack accum-var)) accum-var)))) (fn accumulate* [iter-tbl body ...] "Accumulation macro. It takes a binding table and an expression as its arguments. In the binding table, the first form starts out bound to the second value, which is an initial accumulator. The rest are an iterator binding table in the format `each` takes. It runs through the iterator in each step of which the given expression is evaluated, and the accumulator is set to the value of the expression. It eventually returns the final value of the accumulator. For example, (accumulate [total 0 _ n (pairs {:apple 2 :orange 3})] (+ total n)) returns 5" (accumulate-impl false iter-tbl body ...)) (fn faccumulate* [iter-tbl body ...] "Identical to accumulate, but after the accumulator the binding table is the same as `for` instead of `each`. Like collect to fcollect, will iterate over a numerical range like `for` rather than an iterator." (accumulate-impl true iter-tbl body ...)) (fn double-eval-safe? [x type] (or (= :number type) (= :string type) (= :boolean type) (and (sym? x) (not (multi-sym? x))))) (fn partial* [f ...] "Return a function with all arguments partially applied to f." (assert f "expected a function to partially apply") (let [bindings [] args []] (each [_ arg (ipairs [...])] (if (double-eval-safe? arg (type arg)) (table.insert args arg) (let [name (gensym)] (table.insert bindings name) (table.insert bindings arg) (table.insert args name)))) (let [body (list f (unpack args))] (table.insert body _VARARG) ;; only use the extra let if we need double-eval protection (if (= 0 (length bindings)) `(fn [,_VARARG] ,body) `(let ,bindings (fn [,_VARARG] ,body)))))) (fn pick-args* [n f] "Create a function of arity n that applies its arguments to f. For example, (pick-args 2 func) expands to (fn [_0_ _1_] (func _0_ _1_))" (if (and _G.io _G.io.stderr) (_G.io.stderr:write "-- WARNING: pick-args is deprecated and will be removed in the future.\n")) (assert (and (= (type n) :number) (= n (math.floor n)) (<= 0 n)) (.. "Expected n to be an integer literal >= 0, got " (tostring n))) (let [bindings []] (for [i 1 n] (tset bindings i (gensym))) `(fn ,bindings (,f ,(unpack bindings))))) (fn pick-values* [n ...] "Evaluate to exactly n values. For example, (pick-values 2 ...) expands to (let [(_0_ _1_) ...] (values _0_ _1_))" (assert (and (= :number (type n)) (<= 0 n) (= n (math.floor n))) (.. "Expected n to be an integer >= 0, got " (tostring n))) (let [let-syms (list) let-values (if (= 1 (select "#" ...)) ... `(values ,...))] (for [i 1 n] (table.insert let-syms (gensym))) (if (= n 0) `(values) `(let [,let-syms ,let-values] (values ,(unpack let-syms)))))) (fn lambda* [...] "Function literal with nil-checked arguments. Like `fn`, but will throw an exception if a declared argument is passed in as nil, unless that argument's name begins with a question mark." (let [args [...] 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