package.preload["fennel.repl"] = package.preload["fennel.repl"] or function(...) local utils = require("fennel.utils") local parser = require("fennel.parser") local compiler = require("fennel.compiler") local specials = require("fennel.specials") local function default_read_chunk(parser_state) local function _0_() if (0 < parser_state["stack-size"]) then return ".." else return ">> " end end io.write(_0_()) io.flush() local input = io.read() return (input and (input .. "\n")) end local function default_on_values(xs) io.write(table.concat(xs, "\9")) return io.write("\n") end local function default_on_error(errtype, err, lua_source) local function _1_() local _0_0 = errtype if (_0_0 == "Lua Compile") then return ("Bad code generated - likely a bug with the compiler:\n" .. "--- Generated Lua Start ---\n" .. lua_source .. "--- Generated Lua End ---\n") elseif (_0_0 == "Runtime") then return (compiler.traceback(tostring(err), 4) .. "\n") else local _ = _0_0 return ("%s error: %s\n"):format(errtype, tostring(err)) end end return io.write(_1_()) end local save_source = table.concat({"local ___i___ = 1", "while true do", " local name, value = debug.getlocal(1, ___i___)", " if(name and name ~= \"___i___\") then", " ___replLocals___[name] = value", " ___i___ = ___i___ + 1", " else break end end"}, "\n") local function splice_save_locals(env, lua_source) env.___replLocals___ = (env.___replLocals___ or {}) local spliced_source = {} local bind = "local %s = ___replLocals___['%s']" for line in lua_source:gmatch("([^\n]+)\n?") do table.insert(spliced_source, line) end for name in pairs(env.___replLocals___) do table.insert(spliced_source, 1, bind:format(name, name)) end if ((1 < #spliced_source) and (spliced_source[#spliced_source]):match("^ *return .*$")) then table.insert(spliced_source, #spliced_source, save_source) end return table.concat(spliced_source, "\n") end local commands = {} local function command_3f(input) return input:match("^%s*,") end local function command_docs() local _0_ do local tbl_0_ = {} for name, f in pairs(commands) do tbl_0_[(#tbl_0_ + 1)] = (" ,%s - %s"):format(name, ((compiler.metadata):get(f, "fnl/docstring") or "undocumented")) end _0_ = tbl_0_ end return table.concat(_0_, "\n") end commands.help = function(_, _0, on_values) return on_values({("Welcome to Fennel.\nThis is the REPL where you can enter code to be evaluated.\nYou can also run these repl commands:\n\n" .. command_docs() .. "\n ,exit - Leave the repl.\n\nUse (doc something) to see descriptions for individual macros and special forms.\n\nFor more information about the language, see https://fennel-lang.org/reference")}) end do end (compiler.metadata):set(commands.help, "fnl/docstring", "Show this message.") local function reload(module_name, env, on_values, on_error) local _0_0, _1_0 = pcall(specials["load-code"]("return require(...)", env), module_name) if ((_0_0 == true) and (nil ~= _1_0)) then local old = _1_0 local _ = nil package.loaded[module_name] = nil _ = nil local ok, new = pcall(require, module_name) local new0 = nil if not ok then on_values({new}) new0 = old else new0 = new end if ((type(old) == "table") and (type(new0) == "table")) then for k, v in pairs(new0) do old[k] = v end for k in pairs(old) do if (nil == new0[k]) then old[k] = nil end end package.loaded[module_name] = old end return on_values({"ok"}) elseif ((_0_0 == false) and (nil ~= _1_0)) then local msg = _1_0 local function _3_() local _2_0 = msg:gsub("\n.*", "") return _2_0 end return on_error("Runtime", _3_()) end end commands.reload = function(env, read, on_values, on_error) local _0_0, _1_0, _2_0 = pcall(read) if ((_0_0 == true) and (_1_0 == true) and (nil ~= _2_0)) then local module_sym = _2_0 return reload(tostring(module_sym), env, on_values, on_error) elseif ((_0_0 == false) and true and true) then local _3fparse_ok = _1_0 local _3fmsg = _2_0 return on_error("Parse", (_3fmsg or _3fparse_ok)) end end do end (compiler.metadata):set(commands.reload, "fnl/docstring", "Reload the specified module.") commands.reset = function(env, _, on_values) env.___replLocals___ = {} return on_values({"ok"}) end do end (compiler.metadata):set(commands.reset, "fnl/docstring", "Erase all repl-local scope.") local function load_plugin_commands() if (utils.root and utils.root.options and utils.root.options.plugins) then for _, plugin in ipairs(utils.root.options.plugins) do for name, f in pairs(plugin) do local _0_0 = name:match("^repl%-command%-(.*)") if (nil ~= _0_0) then local cmd_name = _0_0 commands[cmd_name] = (commands[cmd_name] or f) end end end return nil end end local function run_command(input, read, loop, env, on_values, on_error) load_plugin_commands() local command_name = input:match(",([^%s/]+)") do local _0_0 = commands[command_name] if (nil ~= _0_0) then local command = _0_0 command(env, read, on_values, on_error) else local _ = _0_0 if ("exit" ~= command_name) then on_values({"Unknown command", command_name}) end end end if ("exit" ~= command_name) then return loop() end end local function completer(env, scope, text) local matches = {} local input_fragment = text:gsub(".*[%s)(]+", "") local function add_partials(input, tbl, prefix) for k in utils.allpairs(tbl) do local k0 = nil if ((tbl == env) or (tbl == env.___replLocals___)) then k0 = scope.unmanglings[k] else k0 = k end if ((#matches < 2000) and (type(k0) == "string") and (input == k0:sub(0, #input))) then table.insert(matches, (prefix .. k0)) end end return nil end local function add_matches(input, tbl, prefix) local prefix0 = nil if prefix then prefix0 = (prefix .. ".") else prefix0 = "" end if not input:find("%.") then return add_partials(input, tbl, prefix0) else local head, tail = input:match("^([^.]+)%.(.*)") local raw_head = nil if ((tbl == env) or (tbl == env.___replLocals___)) then raw_head = scope.manglings[head] else raw_head = head end if (type(tbl[raw_head]) == "table") then return add_matches(tail, tbl[raw_head], (prefix0 .. head)) end end end add_matches(input_fragment, (scope.specials or {})) add_matches(input_fragment, (scope.macros or {})) add_matches(input_fragment, (env.___replLocals___ or {})) add_matches(input_fragment, env) add_matches(input_fragment, (env._ENV or env._G or {})) return matches end local function repl(options) local old_root_options = utils.root.options local env = nil if options.env then env = specials["wrap-env"](options.env) else env = setmetatable({}, {__index = (rawget(_G, "_ENV") or _G)}) end local save_locals_3f = ((options.saveLocals ~= false) and env.debug and env.debug.getlocal) local opts = {} local _ = nil for k, v in pairs(options) do opts[k] = v end _ = nil local read_chunk = (opts.readChunk or default_read_chunk) local on_values = (opts.onValues or default_on_values) local on_error = (opts.onError or default_on_error) local pp = (opts.pp or tostring) local byte_stream, clear_stream = parser.granulate(read_chunk) local chars = {} local read, reset = nil, nil local function _1_(parser_state) local c = byte_stream(parser_state) table.insert(chars, c) return c end read, reset = parser.parser(_1_) local scope = compiler["make-scope"]() opts.useMetadata = (options.useMetadata ~= false) if (opts.allowedGlobals == nil) then opts.allowedGlobals = specials["current-global-names"](opts.env) end if opts.registerCompleter then local function _3_(...) return completer(env, scope, ...) end opts.registerCompleter(_3_) end local function print_values(...) local vals = {...} local out = {} env._, env.__ = vals[1], vals for i = 1, select("#", ...) do table.insert(out, pp(vals[i])) end return on_values(out) end local function loop() for k in pairs(chars) do chars[k] = nil end local ok, parse_ok_3f, x = pcall(read) local src_string = string.char((table.unpack or _G.unpack)(chars)) utils.root.options = opts if not ok then on_error("Parse", parse_ok_3f) clear_stream() reset() return loop() elseif command_3f(src_string) then return run_command(src_string, read, loop, env, on_values, on_error) else if parse_ok_3f then do local _4_0, _5_0 = pcall(compiler.compile, x, {["assert-compile"] = opts["assert-compile"], ["parse-error"] = opts["parse-error"], correlate = opts.correlate, moduleName = opts.moduleName, scope = scope, source = src_string, useMetadata = opts.useMetadata}) if ((_4_0 == false) and (nil ~= _5_0)) then local msg = _5_0 clear_stream() on_error("Compile", msg) elseif ((_4_0 == true) and (nil ~= _5_0)) then local src = _5_0 local src0 = nil if save_locals_3f then src0 = splice_save_locals(env, src) else src0 = src end local _7_0, _8_0 = pcall(specials["load-code"], src0, env) if ((_7_0 == false) and (nil ~= _8_0)) then local msg = _8_0 clear_stream() on_error("Lua Compile", msg, src0) elseif (true and (nil ~= _8_0)) then local _0 = _7_0 local chunk = _8_0 local function _9_() return print_values(chunk()) end local function _10_(...) return on_error("Runtime", ...) end xpcall(_9_, _10_) end end end utils.root.options = old_root_options return loop() end end end return loop() end return repl end package.preload["fennel.view"] = package.preload["fennel.view"] or function(...) local type_order = {["function"] = 5, boolean = 2, number = 1, string = 3, table = 4, thread = 7, userdata = 6} local function sort_keys(_0_0, _1_0) local _1_ = _0_0 local a = _1_[1] local _2_ = _1_0 local b = _2_[1] local ta = type(a) local tb = type(b) if ((ta == tb) and ((ta == "string") or (ta == "number"))) then return (a < b) else local dta = type_order[ta] local dtb = type_order[tb] if (dta and dtb) then return (dta < dtb) elseif dta then return true elseif dtb then return false else return (ta < tb) end end end local function table_kv_pairs(t) local assoc_3f = false local i = 1 local kv = {} local insert = table.insert for k, v in pairs(t) do if ((type(k) ~= "number") or (k ~= i)) then assoc_3f = true end i = (i + 1) insert(kv, {k, v}) end table.sort(kv, sort_keys) if (#kv == 0) then return kv, "empty" else local function _2_() if assoc_3f then return "table" else return "seq" end end return kv, _2_() end end local function count_table_appearances(t, appearances) if (type(t) == "table") then if not appearances[t] then appearances[t] = 1 for k, v in pairs(t) do count_table_appearances(k, appearances) count_table_appearances(v, appearances) end else appearances[t] = ((appearances[t] or 0) + 1) end end return appearances end local function save_table(t, seen) local seen0 = (seen or {len = 0}) local id = (seen0.len + 1) if not seen0[t] then seen0[t] = id seen0.len = id end return seen0 end local function detect_cycle(t, seen, _3fk) if ("table" == type(t)) then seen[t] = true local _2_0, _3_0 = next(t, _3fk) if ((nil ~= _2_0) and (nil ~= _3_0)) then local k = _2_0 local v = _3_0 return (seen[k] or detect_cycle(k, seen) or seen[v] or detect_cycle(v, seen) or detect_cycle(t, seen, k)) end end end local function visible_cycle_3f(t, options) return (options["detect-cycles?"] and detect_cycle(t, {}) and save_table(t, options.seen) and (1 < (options.appearances[t] or 0))) end local function table_indent(t, indent, id) local opener_length = nil if id then opener_length = (#tostring(id) + 2) else opener_length = 1 end return (indent + opener_length) end local pp = nil local function concat_table_lines(elements, options, multiline_3f, indent, table_type, prefix) local indent_str = ("\n" .. string.rep(" ", indent)) local open = nil local function _2_() if ("seq" == table_type) then return "[" else return "{" end end open = ((prefix or "") .. _2_()) local close = nil if ("seq" == table_type) then close = "]" else close = "}" end local oneline = (open .. table.concat(elements, " ") .. close) if (not options["one-line?"] and (multiline_3f or ((indent + #oneline) > options["line-length"]))) then return (open .. table.concat(elements, indent_str) .. close) else return oneline end end local function pp_associative(t, kv, options, indent, key_3f) local multiline_3f = false local id = options.seen[t] if (options.level >= options.depth) then return "{...}" elseif (id and options["detect-cycles?"]) then return ("@" .. id .. "{...}") else local visible_cycle_3f0 = visible_cycle_3f(t, options) local id0 = (visible_cycle_3f0 and options.seen[t]) local indent0 = table_indent(t, indent, id0) local slength = nil local function _3_() local _2_0 = rawget(_G, "utf8") if _2_0 then return _2_0.len else return _2_0 end end local function _4_(_241) return #_241 end slength = ((options["utf8?"] and _3_()) or _4_) local prefix = nil if visible_cycle_3f0 then prefix = ("@" .. id0) else prefix = "" end local items = nil do local tbl_0_ = {} for _, _6_0 in pairs(kv) do local _7_ = _6_0 local k = _7_[1] local v = _7_[2] local _8_ do local k0 = pp(k, options, (indent0 + 1), true) local v0 = pp(v, options, (indent0 + slength(k0) + 1)) multiline_3f = (multiline_3f or k0:find("\n") or v0:find("\n")) _8_ = (k0 .. " " .. v0) end tbl_0_[(#tbl_0_ + 1)] = _8_ end items = tbl_0_ end return concat_table_lines(items, options, multiline_3f, indent0, "table", prefix) end end local function pp_sequence(t, kv, options, indent) local multiline_3f = false local id = options.seen[t] if (options.level >= options.depth) then return "[...]" elseif (id and options["detect-cycles?"]) then return ("@" .. id .. "[...]") else local visible_cycle_3f0 = visible_cycle_3f(t, options) local id0 = (visible_cycle_3f0 and options.seen[t]) local indent0 = table_indent(t, indent, id0) local prefix = nil if visible_cycle_3f0 then prefix = ("@" .. id0) else prefix = "" end local items = nil do local tbl_0_ = {} for _, _3_0 in pairs(kv) do local _4_ = _3_0 local _0 = _4_[1] local v = _4_[2] local _5_ do local v0 = pp(v, options, indent0) multiline_3f = (multiline_3f or v0:find("\n")) _5_ = v0 end tbl_0_[(#tbl_0_ + 1)] = _5_ end items = tbl_0_ end return concat_table_lines(items, options, multiline_3f, indent0, "seq", prefix) end end local function concat_lines(lines, options, indent, force_multi_line_3f) if (#lines == 0) then if options["empty-as-sequence?"] then return "[]" else return "{}" end else local oneline = nil local _2_ do local tbl_0_ = {} for _, line in ipairs(lines) do tbl_0_[(#tbl_0_ + 1)] = line:gsub("^%s+", "") end _2_ = tbl_0_ end oneline = table.concat(_2_, " ") if (not options["one-line?"] and (force_multi_line_3f or oneline:find("\n") or ((indent + #oneline) > options["line-length"]))) then return table.concat(lines, ("\n" .. string.rep(" ", indent))) else return oneline end end end local function pp_metamethod(t, metamethod, options, indent) if (options.level >= options.depth) then if options["empty-as-sequence?"] then return "[...]" else return "{...}" end else local _ = nil local function _2_(_241) return visible_cycle_3f(_241, options) end options["visible-cycle?"] = _2_ _ = nil local lines, force_multi_line_3f = metamethod(t, pp, options, indent) options["visible-cycle?"] = nil local _3_0 = type(lines) if (_3_0 == "string") then return lines elseif (_3_0 == "table") then return concat_lines(lines, options, indent, force_multi_line_3f) else local _0 = _3_0 return error("__fennelview metamethod must return a table of lines") end end end local function pp_table(x, options, indent) options.level = (options.level + 1) local x0 = nil do local _2_0 = nil if options["metamethod?"] then local _3_0 = x if _3_0 then local _4_0 = getmetatable(_3_0) if _4_0 then _2_0 = _4_0.__fennelview else _2_0 = _4_0 end else _2_0 = _3_0 end else _2_0 = nil end if (nil ~= _2_0) then local metamethod = _2_0 x0 = pp_metamethod(x, metamethod, options, indent) else local _ = _2_0 local _4_0, _5_0 = table_kv_pairs(x) if (true and (_5_0 == "empty")) then local _0 = _4_0 if options["empty-as-sequence?"] then x0 = "[]" else x0 = "{}" end elseif ((nil ~= _4_0) and (_5_0 == "table")) then local kv = _4_0 x0 = pp_associative(x, kv, options, indent) elseif ((nil ~= _4_0) and (_5_0 == "seq")) then local kv = _4_0 x0 = pp_sequence(x, kv, options, indent) else x0 = nil end end end options.level = (options.level - 1) return x0 end local function number__3estring(n) local _2_0 = string.gsub(tostring(n), ",", ".") return _2_0 end local function colon_string_3f(s) return s:find("^[-%w?^_!$%&*+./@|<=>]+$") end local function pp_string(str, options, indent) local escs = nil local _2_ if (options["escape-newlines?"] and (#str < (options["line-length"] - indent))) then _2_ = "\\n" else _2_ = "\n" end local function _4_(_241, _242) return ("\\%03d"):format(_242:byte()) end escs = setmetatable({["\""] = "\\\"", ["\11"] = "\\v", ["\12"] = "\\f", ["\13"] = "\\r", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\\"] = "\\\\", ["\n"] = _2_}, {__index = _4_}) return ("\"" .. str:gsub("[%c\\\"]", escs) .. "\"") end local function make_options(t, options) local defaults = {["detect-cycles?"] = true, ["empty-as-sequence?"] = false, ["escape-newlines?"] = false, ["line-length"] = 80, ["metamethod?"] = true, ["one-line?"] = false, ["prefer-colon?"] = false, ["utf8?"] = true, depth = 128} local overrides = {appearances = count_table_appearances(t, {}), level = 0, seen = {len = 0}} for k, v in pairs((options or {})) do defaults[k] = v end for k, v in pairs(overrides) do defaults[k] = v end return defaults end local function _2_(x, options, indent, colon_3f) local indent0 = (indent or 0) local options0 = (options or make_options(x)) local tv = type(x) local function _4_() local _3_0 = getmetatable(x) if _3_0 then return _3_0.__fennelview else return _3_0 end end if ((tv == "table") or ((tv == "userdata") and _4_())) then return pp_table(x, options0, indent0) elseif (tv == "number") then return number__3estring(x) else local function _5_() if (colon_3f ~= nil) then return colon_3f elseif ("function" == type(options0["prefer-colon?"])) then return options0["prefer-colon?"](x) else return options0["prefer-colon?"] end end if ((tv == "string") and colon_string_3f(x) and _5_()) then return (":" .. x) elseif (tv == "string") then return pp_string(x, options0, indent0) elseif ((tv == "boolean") or (tv == "nil")) then return tostring(x) else return ("#<" .. tostring(x) .. ">") end end end pp = _2_ local function view(x, options) return pp(x, make_options(x, options), 0) end return view end package.preload["fennel.specials"] = package.preload["fennel.specials"] or function(...) local utils = require("fennel.utils") local view = require("fennel.view") local parser = require("fennel.parser") local compiler = require("fennel.compiler") local unpack = (table.unpack or _G.unpack) local SPECIALS = compiler.scopes.global.specials local function wrap_env(env) local function _0_(_, key) if (type(key) == "string") then return env[compiler["global-unmangling"](key)] else return env[key] end end local function _1_(_, key, value) if (type(key) == "string") then env[compiler["global-unmangling"](key)] = value return nil else env[key] = value return nil end end local function _2_() local function putenv(k, v) local _3_ if (type(k) == "string") then _3_ = compiler["global-unmangling"](k) else _3_ = k end return _3_, v end return next, utils.kvmap(env, putenv), nil end return setmetatable({}, {__index = _0_, __newindex = _1_, __pairs = _2_}) end local function current_global_names(env) return utils.kvmap((env or _G), compiler["global-unmangling"]) end local function load_code(code, environment, filename) local environment0 = (environment or rawget(_G, "_ENV") or _G) if (rawget(_G, "setfenv") and rawget(_G, "loadstring")) then local f = assert(_G.loadstring(code, filename)) _G.setfenv(f, environment0) return f else return assert(load(code, filename, "t", environment0)) end end local function doc_2a(tgt, name) if not tgt then return (name .. " not found") else local docstring = (((compiler.metadata):get(tgt, "fnl/docstring") or "#")):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 _0_ if (#arglist > 0) then _0_ = " " else _0_ = "" end return string.format("(%s%s%s)\n %s", name, _0_, arglist, docstring) else return string.format("%s\n %s", name, docstring) end end end local function doc_special(name, arglist, docstring) compiler.metadata[SPECIALS[name]] = {["fnl/arglist"] = arglist, ["fnl/docstring"] = docstring} return nil end local function compile_do(ast, scope, parent, start) local start0 = (start or 2) local len = #ast local sub_scope = compiler["make-scope"](scope) for i = start0, len do compiler.compile1(ast[i], sub_scope, parent, {nval = 0}) end return nil end SPECIALS["do"] = function(ast, scope, parent, opts, start, chunk, sub_scope, pre_syms) local start0 = (start or 2) local sub_scope0 = (sub_scope or compiler["make-scope"](scope)) local chunk0 = (chunk or {}) local len = #ast local retexprs = {returned = true} local function compile_body(outer_target, outer_tail, outer_retexprs) if (len < start0) then compiler.compile1(nil, sub_scope0, chunk0, {tail = outer_tail, target = outer_target}) else for i = start0, len do local subopts = {nval = (((i ~= len) and 0) or opts.nval), tail = (((i == len) and outer_tail) or nil), target = (((i == len) and outer_target) or nil)} local _ = utils["propagate-options"](opts, subopts) local subexprs = compiler.compile1(ast[i], sub_scope0, chunk0, subopts) if (i ~= len) then compiler["keep-side-effects"](subexprs, parent, nil, ast[i]) end end end compiler.emit(parent, chunk0, ast) compiler.emit(parent, "end", ast) return (outer_retexprs or retexprs) end if (opts.target or (opts.nval == 0) or opts.tail) then compiler.emit(parent, "do", ast) return compile_body(opts.target, opts.tail) elseif opts.nval then local syms = {} for i = 1, opts.nval do local s = ((pre_syms and pre_syms[i]) or compiler.gensym(scope)) syms[i] = s retexprs[i] = utils.expr(s, "sym") end local outer_target = table.concat(syms, ", ") compiler.emit(parent, string.format("local %s", outer_target), ast) compiler.emit(parent, "do", ast) return compile_body(outer_target, opts.tail) else local fname = compiler.gensym(scope) local fargs = nil if scope.vararg then fargs = "..." else fargs = "" end compiler.emit(parent, string.format("local function %s(%s)", fname, fargs), ast) utils.hook("do", ast, sub_scope0) return compile_body(nil, true, utils.expr((fname .. "(" .. fargs .. ")"), "statement")) end end doc_special("do", {"..."}, "Evaluate multiple forms; return last value.") SPECIALS.values = function(ast, scope, parent) local len = #ast local exprs = {} for i = 2, len do local subexprs = compiler.compile1(ast[i], scope, parent, {nval = ((i ~= len) and 1)}) table.insert(exprs, subexprs[1]) if (i == len) then for j = 2, #subexprs do table.insert(exprs, subexprs[j]) end end end return exprs end doc_special("values", {"..."}, "Return multiple values from a function. Must be in tail position.") local function deep_tostring(x, key_3f) local elems = {} if utils["sequence?"](x) then local _0_ do local tbl_0_ = {} for _, v in ipairs(x) do tbl_0_[(#tbl_0_ + 1)] = deep_tostring(v) end _0_ = tbl_0_ end return ("[" .. table.concat(_0_, " ") .. "]") elseif utils["table?"](x) then local _0_ do local tbl_0_ = {} for k, v in pairs(x) do tbl_0_[(#tbl_0_ + 1)] = (deep_tostring(k, true) .. " " .. deep_tostring(v)) end _0_ = tbl_0_ end return ("{" .. table.concat(_0_, " ") .. "}") elseif (key_3f and (type(x) == "string") and x:find("^[-%w?\\^_!$%&*+./@:|<=>]+$")) then return (":" .. x) elseif (type(x) == "string") then return string.format("%q", x):gsub("\\\"", "\\\\\""):gsub("\"", "\\\"") else return tostring(x) end end local function set_fn_metadata(arg_list, docstring, parent, fn_name) if utils.root.options.useMetadata then local args = nil local function _0_(_241) return ("\"%s\""):format(deep_tostring(_241)) end args = utils.map(arg_list, _0_) local meta_fields = {"\"fnl/arglist\"", ("{" .. table.concat(args, ", ") .. "}")} if docstring then table.insert(meta_fields, "\"fnl/docstring\"") table.insert(meta_fields, ("\"" .. docstring:gsub("%s+$", ""):gsub("\\", "\\\\"):gsub("\n", "\\n"):gsub("\"", "\\\"") .. "\"")) end local meta_str = ("require(\"%s\").metadata"):format((utils.root.options.moduleName or "fennel")) return compiler.emit(parent, ("pcall(function() %s:setall(%s, %s) end)"):format(meta_str, fn_name, table.concat(meta_fields, ", "))) end end local function get_fn_name(ast, scope, fn_name, multi) if (fn_name and (fn_name[1] ~= "nil")) then local _0_ if not multi then _0_ = compiler["declare-local"](fn_name, {}, scope, ast) else _0_ = compiler["symbol-to-expression"](fn_name, scope)[1] end return _0_, not multi, 3 else return nil, true, 2 end end local function compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, local_3f, arg_name_list, arg_list, docstring) for i = (index + 1), #ast do compiler.compile1(ast[i], f_scope, f_chunk, {nval = (((i ~= #ast) and 0) or nil), tail = (i == #ast)}) end local _0_ if local_3f then _0_ = "local function %s(%s)" else _0_ = "%s = function(%s)" end compiler.emit(parent, string.format(_0_, fn_name, table.concat(arg_name_list, ", ")), ast) compiler.emit(parent, f_chunk, ast) compiler.emit(parent, "end", ast) set_fn_metadata(arg_list, docstring, parent, fn_name) utils.hook("fn", ast, f_scope) return utils.expr(fn_name, "sym") end local function compile_anonymous_fn(ast, f_scope, f_chunk, parent, index, arg_name_list, arg_list, docstring, scope) local fn_name = compiler.gensym(scope) return compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, true, arg_name_list, arg_list, docstring) end SPECIALS.fn = function(ast, scope, parent) local f_scope = nil do local _0_0 = compiler["make-scope"](scope) _0_0["vararg"] = false f_scope = _0_0 end local f_chunk = {} local fn_sym = utils["sym?"](ast[2]) local multi = (fn_sym and utils["multi-sym?"](fn_sym[1])) local fn_name, local_3f, index = get_fn_name(ast, scope, fn_sym, multi) local arg_list = compiler.assert(utils["table?"](ast[index]), "expected parameters table", ast) compiler.assert((not multi or not multi["multi-sym-method-call"]), ("unexpected multi symbol " .. tostring(fn_name)), fn_sym) local function get_arg_name(arg) if utils["varg?"](arg) then compiler.assert((arg == arg_list[#arg_list]), "expected vararg as last parameter", ast) f_scope.vararg = true return "..." elseif (utils["sym?"](arg) and (utils.deref(arg) ~= "nil") and not utils["multi-sym?"](utils.deref(arg))) then return compiler["declare-local"](arg, {}, f_scope, ast) elseif utils["table?"](arg) then local raw = utils.sym(compiler.gensym(scope)) local declared = compiler["declare-local"](raw, {}, f_scope, ast) compiler.destructure(arg, raw, ast, f_scope, f_chunk, {declaration = true, nomulti = true, symtype = "arg"}) return declared else return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(arg)), ast[2]) end end local arg_name_list = utils.map(arg_list, get_arg_name) local index0, docstring = nil, nil if ((type(ast[(index + 1)]) == "string") and ((index + 1) < #ast)) then index0, docstring = (index + 1), ast[(index + 1)] else index0, docstring = index, nil end if fn_name then return compile_named_fn(ast, f_scope, f_chunk, parent, index0, fn_name, local_3f, arg_name_list, arg_list, docstring) else return compile_anonymous_fn(ast, f_scope, f_chunk, parent, index0, arg_name_list, arg_list, docstring, scope) end end doc_special("fn", {"name?", "args", "docstring?", "..."}, "Function syntax. May optionally include a name and docstring.\nIf a name is provided, the function will be bound in the current scope.\nWhen called with the wrong number of args, excess args will be discarded\nand lacking args will be nil, use lambda for arity-checked functions.") SPECIALS.lua = function(ast, _, parent) compiler.assert(((#ast == 2) or (#ast == 3)), "expected 1 or 2 arguments", ast) if (ast[2] ~= nil) then table.insert(parent, {ast = ast, leaf = tostring(ast[2])}) end if (ast[3] ~= nil) then return tostring(ast[3]) end end SPECIALS.doc = function(ast, scope, parent) assert(utils.root.options.useMetadata, "can't look up doc with metadata disabled.") compiler.assert((#ast == 2), "expected one argument", ast) local target = utils.deref(ast[2]) local special_or_macro = (scope.specials[target] or scope.macros[target]) if special_or_macro then return ("print(%q)"):format(doc_2a(special_or_macro, target)) else local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1}) local value = _0_[1] return ("print(require('%s').doc(%s, '%s'))"):format((utils.root.options.moduleName or "fennel"), tostring(value), tostring(ast[2])) end end doc_special("doc", {"x"}, "Print the docstring and arglist for a function, macro, or special form.") local function dot(ast, scope, parent) compiler.assert((1 < #ast), "expected table argument", ast) local len = #ast local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1}) local lhs = _0_[1] if (len == 2) then return tostring(lhs) else local indices = {} for i = 3, len do local index = ast[i] if ((type(index) == "string") and utils["valid-lua-identifier?"](index)) then table.insert(indices, ("." .. index)) else local _1_ = compiler.compile1(index, scope, parent, {nval = 1}) local index0 = _1_[1] table.insert(indices, ("[" .. tostring(index0) .. "]")) end end if (tostring(lhs):find("[{\"0-9]") or ("nil" == tostring(lhs))) then return ("(" .. tostring(lhs) .. ")" .. table.concat(indices)) else return (tostring(lhs) .. table.concat(indices)) end end end SPECIALS["."] = dot doc_special(".", {"tbl", "key1", "..."}, "Look up key1 in tbl table. If more args are provided, do a nested lookup.") SPECIALS.global = function(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceglobal = true, nomulti = true, symtype = "global"}) return nil end doc_special("global", {"name", "val"}, "Set name as a global with val.") SPECIALS.set = function(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {noundef = true, symtype = "set"}) return nil end doc_special("set", {"name", "val"}, "Set a local variable to a new value. Only works on locals using var.") local function set_forcibly_21_2a(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceset = true, symtype = "set"}) return nil end SPECIALS["set-forcibly!"] = set_forcibly_21_2a local function local_2a(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, nomulti = true, symtype = "local"}) return nil end SPECIALS["local"] = local_2a doc_special("local", {"name", "val"}, "Introduce new top-level immutable local.") SPECIALS.var = function(ast, scope, parent) compiler.assert((#ast == 3), "expected name and value", ast) compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, isvar = true, nomulti = true, symtype = "var"}) return nil end doc_special("var", {"name", "val"}, "Introduce new mutable local.") SPECIALS.let = function(ast, scope, parent, opts) local bindings = ast[2] local pre_syms = {} compiler.assert((utils["list?"](bindings) or utils["table?"](bindings)), "expected binding table", ast) compiler.assert(((#bindings % 2) == 0), "expected even number of name/value bindings", ast[2]) compiler.assert((#ast >= 3), "expected body expression", ast[1]) for _ = 1, (opts.nval or 0) do table.insert(pre_syms, compiler.gensym(scope)) end local sub_scope = compiler["make-scope"](scope) local sub_chunk = {} for i = 1, #bindings, 2 do compiler.destructure(bindings[i], bindings[(i + 1)], ast, sub_scope, sub_chunk, {declaration = true, nomulti = true, symtype = "let"}) end return SPECIALS["do"](ast, scope, parent, opts, 3, sub_chunk, sub_scope, pre_syms) end doc_special("let", {"[name1 val1 ... nameN valN]", "..."}, "Introduces a new scope in which a given set of local bindings are used.") SPECIALS.tset = function(ast, scope, parent) compiler.assert((#ast > 3), "expected table, key, and value arguments", ast) local root = compiler.compile1(ast[2], scope, parent, {nval = 1})[1] local keys = {} for i = 3, (#ast - 1) do local _0_ = compiler.compile1(ast[i], scope, parent, {nval = 1}) local key = _0_[1] table.insert(keys, tostring(key)) end local value = compiler.compile1(ast[#ast], scope, parent, {nval = 1})[1] local rootstr = tostring(root) local fmtstr = nil if rootstr:match("^{") then fmtstr = "do end (%s)[%s] = %s" else fmtstr = "%s[%s] = %s" end return compiler.emit(parent, fmtstr:format(tostring(root), table.concat(keys, "]["), tostring(value)), ast) end doc_special("tset", {"tbl", "key1", "...", "keyN", "val"}, "Set the value of a table field. Can take additional keys to set\nnested values, but all parents must contain an existing table.") local function calculate_target(scope, opts) if not (opts.tail or opts.target or opts.nval) then return "iife", true, nil elseif (opts.nval and (opts.nval ~= 0) and not opts.target) then local accum = {} local target_exprs = {} for i = 1, opts.nval do local s = compiler.gensym(scope) accum[i] = s target_exprs[i] = utils.expr(s, "sym") end return "target", opts.tail, table.concat(accum, ", "), target_exprs else return "none", opts.tail, opts.target end end local function if_2a(ast, scope, parent, opts) local do_scope = compiler["make-scope"](scope) local branches = {} local wrapper, inner_tail, inner_target, target_exprs = calculate_target(scope, opts) local body_opts = {nval = opts.nval, tail = inner_tail, target = inner_target} local function compile_body(i) local chunk = {} local cscope = compiler["make-scope"](do_scope) compiler["keep-side-effects"](compiler.compile1(ast[i], cscope, chunk, body_opts), chunk, nil, ast[i]) return {chunk = chunk, scope = cscope} end for i = 2, (#ast - 1), 2 do local condchunk = {} local res = compiler.compile1(ast[i], do_scope, condchunk, {nval = 1}) local cond = res[1] local branch = compile_body((i + 1)) branch.cond = cond branch.condchunk = condchunk branch.nested = ((i ~= 2) and (next(condchunk, nil) == nil)) table.insert(branches, branch) end local has_else_3f = ((#ast > 3) and ((#ast % 2) == 0)) local else_branch = (has_else_3f and compile_body(#ast)) local s = compiler.gensym(scope) local buffer = {} local last_buffer = buffer for i = 1, #branches do local branch = branches[i] local fstr = nil if not branch.nested then fstr = "if %s then" else fstr = "elseif %s then" end local cond = tostring(branch.cond) local cond_line = nil if ((cond == "true") and branch.nested and (i == #branches) and not has_else_3f) then cond_line = "else" else cond_line = fstr:format(cond) end if branch.nested then compiler.emit(last_buffer, branch.condchunk, ast) else for _, v in ipairs(branch.condchunk) do compiler.emit(last_buffer, v, ast) end end compiler.emit(last_buffer, cond_line, ast) compiler.emit(last_buffer, branch.chunk, ast) if (i == #branches) then if has_else_3f then compiler.emit(last_buffer, "else", ast) compiler.emit(last_buffer, else_branch.chunk, ast) elseif (inner_target and (cond_line ~= "else")) then compiler.emit(last_buffer, "else", ast) compiler.emit(last_buffer, ("%s = nil"):format(inner_target), ast) end compiler.emit(last_buffer, "end", ast) elseif not branches[(i + 1)].nested then local next_buffer = {} compiler.emit(last_buffer, "else", ast) compiler.emit(last_buffer, next_buffer, ast) compiler.emit(last_buffer, "end", ast) last_buffer = next_buffer end end if (wrapper == "iife") then local iifeargs = ((scope.vararg and "...") or "") compiler.emit(parent, ("local function %s(%s)"):format(tostring(s), iifeargs), ast) compiler.emit(parent, buffer, ast) compiler.emit(parent, "end", ast) return utils.expr(("%s(%s)"):format(tostring(s), iifeargs), "statement") elseif (wrapper == "none") then for i = 1, #buffer do compiler.emit(parent, buffer[i], ast) end return {returned = true} else compiler.emit(parent, ("local %s"):format(inner_target), ast) for i = 1, #buffer do compiler.emit(parent, buffer[i], ast) end return target_exprs end end SPECIALS["if"] = if_2a doc_special("if", {"cond1", "body1", "...", "condN", "bodyN"}, "Conditional form.\nTakes any number of condition/body pairs and evaluates the first body where\nthe condition evaluates to truthy. Similar to cond in other lisps.") local function remove_until_condition(bindings) if ("until" == bindings[(#bindings - 1)]) then table.remove(bindings, (#bindings - 1)) return table.remove(bindings) end end local function compile_until(condition, scope, chunk) if condition then local _0_ = compiler.compile1(condition, scope, chunk, {nval = 1}) local condition_lua = _0_[1] return compiler.emit(chunk, ("if %s then break end"):format(tostring(condition_lua)), condition) end end SPECIALS.each = function(ast, scope, parent) compiler.assert((#ast >= 3), "expected body expression", ast[1]) local binding = compiler.assert(utils["table?"](ast[2]), "expected binding table", ast) local until_condition = remove_until_condition(binding) local iter = table.remove(binding, #binding) local destructures = {} local new_manglings = {} local sub_scope = compiler["make-scope"](scope) local function destructure_binding(v) if utils["sym?"](v) then return compiler["declare-local"](v, {}, sub_scope, ast, new_manglings) else local raw = utils.sym(compiler.gensym(sub_scope)) destructures[raw] = v return compiler["declare-local"](raw, {}, sub_scope, ast) end end local bind_vars = utils.map(binding, destructure_binding) local vals = compiler.compile1(iter, sub_scope, parent) local val_names = utils.map(vals, tostring) local chunk = {} compiler.emit(parent, ("for %s in %s do"):format(table.concat(bind_vars, ", "), table.concat(val_names, ", ")), ast) for raw, args in utils.stablepairs(destructures) do compiler.destructure(args, raw, ast, sub_scope, chunk, {declaration = true, nomulti = true, symtype = "each"}) end compiler["apply-manglings"](sub_scope, new_manglings, ast) compile_until(until_condition, sub_scope, chunk) compile_do(ast, sub_scope, chunk, 3) compiler.emit(parent, chunk, ast) return compiler.emit(parent, "end", ast) end doc_special("each", {"[key value (iterator)]", "..."}, "Runs the body once for each set of values provided by the given iterator.\nMost commonly used with ipairs for sequential tables or pairs for undefined\norder, but can be used with any iterator.") 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.") local function for_2a(ast, scope, parent) local ranges = compiler.assert(utils["table?"](ast[2]), "expected binding table", ast) local until_condition = remove_until_condition(ast[2]) local binding_sym = table.remove(ast[2], 1) local sub_scope = compiler["make-scope"](scope) local range_args = {} local chunk = {} compiler.assert(utils["sym?"](binding_sym), ("unable to bind %s %s"):format(type(binding_sym), tostring(binding_sym)), ast[2]) compiler.assert((#ast >= 3), "expected body expression", ast[1]) for i = 1, math.min(#ranges, 3) do range_args[i] = tostring(compiler.compile1(ranges[i], sub_scope, parent, {nval = 1})[1]) end compiler.emit(parent, ("for %s = %s do"):format(compiler["declare-local"](binding_sym, {}, sub_scope, ast), table.concat(range_args, ", ")), ast) compile_until(until_condition, sub_scope, chunk) compile_do(ast, sub_scope, chunk, 3) compiler.emit(parent, chunk, ast) return compiler.emit(parent, "end", ast) end SPECIALS["for"] = for_2a doc_special("for", {"[index start stop step?]", "..."}, "Numeric loop construct.\nEvaluates body once for each value between start and stop (inclusive).") local function native_method_call(ast, _scope, _parent, target, args) local _0_ = ast local _ = _0_[1] local _0 = _0_[2] local method_string = _0_[3] local call_string = nil if ((target.type == "literal") or (target.type == "expression")) then call_string = "(%s):%s(%s)" else call_string = "%s:%s(%s)" end return utils.expr(string.format(call_string, tostring(target), method_string, table.concat(args, ", ")), "statement") end local function nonnative_method_call(ast, scope, parent, target, args) local method_string = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1]) local args0 = {tostring(target), unpack(args)} return utils.expr(string.format("%s[%s](%s)", tostring(target), method_string, table.concat(args0, ", ")), "statement") end local function double_eval_protected_method_call(ast, scope, parent, target, args) local method_string = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1]) local call = "(function(tgt, m, ...) return tgt[m](tgt, ...) end)(%s, %s)" table.insert(args, 1, method_string) return utils.expr(string.format(call, tostring(target), table.concat(args, ", ")), "statement") end local function method_call(ast, scope, parent) compiler.assert((2 < #ast), "expected at least 2 arguments", ast) local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1}) local target = _0_[1] local args = {} for i = 4, #ast do local subexprs = nil local _1_ if (i ~= #ast) then _1_ = 1 else _1_ = nil end subexprs = compiler.compile1(ast[i], scope, parent, {nval = _1_}) utils.map(subexprs, tostring, args) end if ((type(ast[3]) == "string") and utils["valid-lua-identifier?"](ast[3])) then return native_method_call(ast, scope, parent, target, args) elseif (target.type == "sym") then return nonnative_method_call(ast, scope, parent, target, args) else return double_eval_protected_method_call(ast, scope, parent, target, args) end end SPECIALS[":"] = method_call doc_special(":", {"tbl", "method-name", "..."}, "Call the named method on tbl with the provided args.\nMethod name doesn't have to be known at compile-time; if it is, use\n(tbl:method-name ...) instead.") SPECIALS.comment = function(ast, _, parent) local els = {} for i = 2, #ast do local function _1_() local _0_0 = tostring(ast[i]):gsub("\n", " ") return _0_0 end table.insert(els, _1_()) end return compiler.emit(parent, ("-- " .. table.concat(els, " ")), ast) end doc_special("comment", {"..."}, "Comment which will be emitted in Lua output.") local function hashfn_max_used(f_scope, i, max) local max0 = nil if f_scope.symmeta[("$" .. i)].used then max0 = i else max0 = max end if (i < 9) then return hashfn_max_used(f_scope, (i + 1), max0) else return max0 end end SPECIALS.hashfn = function(ast, scope, parent) compiler.assert((#ast == 2), "expected one argument", ast) local f_scope = nil do local _0_0 = compiler["make-scope"](scope) _0_0["vararg"] = false _0_0["hashfn"] = true f_scope = _0_0 end local f_chunk = {} local name = compiler.gensym(scope) local symbol = utils.sym(name) local args = {} compiler["declare-local"](symbol, {}, scope, ast) for i = 1, 9 do args[i] = compiler["declare-local"](utils.sym(("$" .. i)), {}, f_scope, ast) end local function walker(idx, node, parent_node) if (utils["sym?"](node) and (utils.deref(node) == "$...")) then parent_node[idx] = utils.varg() f_scope.vararg = true return nil else return (utils["list?"](node) or utils["table?"](node)) end end utils["walk-tree"](ast[2], walker) compiler.compile1(ast[2], f_scope, f_chunk, {tail = true}) local max_used = hashfn_max_used(f_scope, 1, 0) if f_scope.vararg then compiler.assert((max_used == 0), "$ and $... in hashfn are mutually exclusive", ast) end local arg_str = nil if f_scope.vararg then arg_str = utils.deref(utils.varg()) else arg_str = table.concat(args, ", ", 1, max_used) end compiler.emit(parent, string.format("local function %s(%s)", name, arg_str), ast) compiler.emit(parent, f_chunk, ast) compiler.emit(parent, "end", ast) return utils.expr(name, "sym") end doc_special("hashfn", {"..."}, "Function literal shorthand; args are either $... OR $1, $2, etc.") local function arithmetic_special(name, zero_arity, unary_prefix, ast, scope, parent) local len = #ast if (len == 1) then compiler.assert(zero_arity, "Expected more than 0 arguments", ast) return utils.expr(zero_arity, "literal") else local operands = {} local padded_op = (" " .. name .. " ") for i = 2, len do local subexprs = nil local _0_ if (i ~= len) then _0_ = 1 else _0_ = nil end subexprs = compiler.compile1(ast[i], scope, parent, {nval = _0_}) utils.map(subexprs, tostring, operands) end if (#operands == 1) then if unary_prefix then return ("(" .. unary_prefix .. padded_op .. operands[1] .. ")") else return operands[1] end else return ("(" .. table.concat(operands, padded_op) .. ")") end end end local function define_arithmetic_special(name, zero_arity, unary_prefix, lua_name) local function _0_(...) return arithmetic_special((lua_name or name), zero_arity, unary_prefix, ...) end SPECIALS[name] = _0_ return doc_special(name, {"a", "b", "..."}, "Arithmetic operator; works the same as Lua but accepts more arguments.") end define_arithmetic_special("+", "0") define_arithmetic_special("..", "''") define_arithmetic_special("^") define_arithmetic_special("-", nil, "") define_arithmetic_special("*", "1") define_arithmetic_special("%") define_arithmetic_special("/", nil, "1") define_arithmetic_special("//", nil, "1") local function bitop_special(native_name, lib_name, zero_arity, unary_prefix, ast, scope, parent) if (#ast == 1) then return compiler.assert(zero_arity, "Expected more than 0 arguments.", ast) else local len = #ast local operands = {} local padded_native_name = (" " .. native_name .. " ") local prefixed_lib_name = ("bit." .. lib_name) for i = 2, len do local subexprs = nil local _0_ if (i ~= len) then _0_ = 1 else _0_ = nil end subexprs = compiler.compile1(ast[i], scope, parent, {nval = _0_}) utils.map(subexprs, tostring, operands) end if (#operands == 1) then if utils.root.options.useBitLib then return (prefixed_lib_name .. "(" .. unary_prefix .. ", " .. operands[1] .. ")") else return ("(" .. unary_prefix .. padded_native_name .. operands[1] .. ")") end else if utils.root.options.useBitLib then return (prefixed_lib_name .. "(" .. table.concat(operands, ", ") .. ")") else return ("(" .. table.concat(operands, padded_native_name) .. ")") end end end end local function define_bitop_special(name, zero_arity, unary_prefix, native) local function _0_(...) return bitop_special(native, name, zero_arity, unary_prefix, ...) end SPECIALS[name] = _0_ return nil end define_bitop_special("lshift", nil, "1", "<<") define_bitop_special("rshift", nil, "1", ">>") define_bitop_special("band", "0", "0", "&") define_bitop_special("bor", "0", "0", "|") define_bitop_special("bxor", "0", "0", "~") doc_special("lshift", {"x", "n"}, "Bitwise logical left shift of x by n bits.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.") doc_special("rshift", {"x", "n"}, "Bitwise logical right shift of x by n bits.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.") doc_special("band", {"x1", "x2", "..."}, "Bitwise AND of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.") doc_special("bor", {"x1", "x2", "..."}, "Bitwise OR of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.") doc_special("bxor", {"x1", "x2", "..."}, "Bitwise XOR of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.") define_arithmetic_special("or", "false") define_arithmetic_special("and", "true") doc_special("and", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.") doc_special("or", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.") doc_special("..", {"a", "b", "..."}, "String concatenation operator; works the same as Lua but accepts more arguments.") local function native_comparator(op, _0_0, scope, parent) local _1_ = _0_0 local _ = _1_[1] local lhs_ast = _1_[2] local rhs_ast = _1_[3] local _2_ = compiler.compile1(lhs_ast, scope, parent, {nval = 1}) local lhs = _2_[1] local _3_ = compiler.compile1(rhs_ast, scope, parent, {nval = 1}) local rhs = _3_[1] return string.format("(%s %s %s)", tostring(lhs), op, tostring(rhs)) end local function double_eval_protected_comparator(op, chain_op, ast, scope, parent) local arglist = {} local comparisons = {} local vals = {} local chain = string.format(" %s ", (chain_op or "and")) for i = 2, #ast do table.insert(arglist, tostring(compiler.gensym(scope))) table.insert(vals, tostring(compiler.compile1(ast[i], scope, parent, {nval = 1})[1])) end for i = 1, (#arglist - 1) do table.insert(comparisons, string.format("(%s %s %s)", arglist[i], op, arglist[(i + 1)])) end return string.format("(function(%s) return %s end)(%s)", table.concat(arglist, ","), table.concat(comparisons, chain), table.concat(vals, ",")) end local function define_comparator_special(name, lua_op, chain_op) do local op = (lua_op or name) local function opfn(ast, scope, parent) compiler.assert((2 < #ast), "expected at least two arguments", ast) if (3 == #ast) then return native_comparator(op, ast, scope, parent) else return double_eval_protected_comparator(op, chain_op, ast, scope, parent) end end SPECIALS[name] = opfn end return doc_special(name, {"a", "b", "..."}, "Comparison operator; works the same as Lua but accepts more arguments.") end define_comparator_special(">") define_comparator_special("<") define_comparator_special(">=") define_comparator_special("<=") define_comparator_special("=", "==") define_comparator_special("not=", "~=", "or") local function define_unary_special(op, realop) local function opfn(ast, scope, parent) compiler.assert((#ast == 2), "expected one argument", ast) local tail = compiler.compile1(ast[2], scope, parent, {nval = 1}) return ((realop or op) .. tostring(tail[1])) end SPECIALS[op] = opfn return nil end define_unary_special("not", "not ") doc_special("not", {"x"}, "Logical operator; works the same as Lua.") define_unary_special("bnot", "~") doc_special("bnot", {"x"}, "Bitwise negation; only works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.") define_unary_special("length", "#") doc_special("length", {"x"}, "Returns the length of a table or string.") SPECIALS["~="] = SPECIALS["not="] SPECIALS["#"] = SPECIALS.length SPECIALS.quote = function(ast, scope, parent) compiler.assert((#ast == 2), "expected one argument") local runtime, this_scope = true, scope while this_scope do this_scope = this_scope.parent if (this_scope == compiler.scopes.compiler) then runtime = false end end return compiler["do-quote"](ast[2], scope, parent, runtime) end doc_special("quote", {"x"}, "Quasiquote the following form. Only works in macro/compiler scope.") local already_warned_3f = {} local compile_env_warning = table.concat({"WARNING: Attempting to %s %s in compile scope.", "In future versions of Fennel this will not be allowed without the", "--no-compiler-sandbox flag or passing a :compilerEnv globals table", "in the options.\n"}, "\n") local function compiler_env_warn(_, key) local v = _G[key] if (v and io and io.stderr and not already_warned_3f[key]) then already_warned_3f[key] = true do end (io.stderr):write(compile_env_warning:format("use global", key)) end return v end local function safe_getmetatable(tbl) local mt = getmetatable(tbl) assert((mt ~= getmetatable("")), "Illegal metatable access!") return mt end local safe_require = nil local function safe_compiler_env(strict_3f) local _1_ if strict_3f then _1_ = nil else _1_ = compiler_env_warn end return setmetatable({assert = assert, bit = rawget(_G, "bit"), error = error, getmetatable = safe_getmetatable, ipairs = ipairs, math = utils.copy(math), next = next, pairs = pairs, pcall = pcall, print = print, rawequal = rawequal, rawget = rawget, rawlen = rawget(_G, "rawlen"), rawset = rawset, require = safe_require, select = select, setmetatable = setmetatable, string = utils.copy(string), table = utils.copy(table), tonumber = tonumber, tostring = tostring, type = type, xpcall = xpcall}, {__index = _1_}) end local function make_compiler_env(ast, scope, parent, strict_3f) local function _1_() return compiler.scopes.macro end local function _2_(symbol) compiler.assert(compiler.scopes.macro, "must call from macro", ast) return compiler.scopes.macro.manglings[tostring(symbol)] end local function _3_(base) return utils.sym(compiler.gensym((compiler.scopes.macro or scope), base)) end local function _4_(form) compiler.assert(compiler.scopes.macro, "must call from macro", ast) return compiler.macroexpand(form, compiler.scopes.macro) end local _6_ do local _5_0 = utils.root.options if ((type(_5_0) == "table") and (_5_0["compiler-env"] == "strict")) then _6_ = safe_compiler_env(true) elseif ((type(_5_0) == "table") and (nil ~= _5_0.compilerEnv)) then local compilerEnv = _5_0.compilerEnv _6_ = compilerEnv elseif ((type(_5_0) == "table") and (nil ~= _5_0["compiler-env"])) then local compiler_env = _5_0["compiler-env"] _6_ = compiler_env else local _ = _5_0 _6_ = safe_compiler_env(false) end end return setmetatable({["assert-compile"] = compiler.assert, ["get-scope"] = _1_, ["in-scope?"] = _2_, ["list?"] = utils["list?"], ["multi-sym?"] = utils["multi-sym?"], ["sequence?"] = utils["sequence?"], ["sym?"] = utils["sym?"], ["table?"] = utils["table?"], ["varg?"] = utils["varg?"], _AST = ast, _CHUNK = parent, _IS_COMPILER = true, _SCOPE = scope, _SPECIALS = compiler.scopes.global.specials, _VARARG = utils.varg(), gensym = _3_, list = utils.list, macroexpand = _4_, sequence = utils.sequence, sym = utils.sym, unpack = unpack, view = view}, {__index = _6_}) end local cfg = string.gmatch(package.config, "([^\n]+)") local dirsep, pathsep, pathmark = (cfg() or "/"), (cfg() or ";"), (cfg() or "?") local pkg_config = {dirsep = dirsep, pathmark = pathmark, pathsep = pathsep} local function escapepat(str) return string.gsub(str, "[^%w]", "%%%1") end local function search_module(modulename, pathstring) local pathsepesc = escapepat(pkg_config.pathsep) local pattern = ("([^%s]*)%s"):format(pathsepesc, pathsepesc) local no_dot_module = modulename:gsub("%.", pkg_config.dirsep) local fullpath = ((pathstring or utils["fennel-module"].path) .. pkg_config.pathsep) local function try_path(path) local filename = path:gsub(escapepat(pkg_config.pathmark), no_dot_module) local filename2 = path:gsub(escapepat(pkg_config.pathmark), modulename) local _1_0 = (io.open(filename) or io.open(filename2)) if (nil ~= _1_0) then local file = _1_0 file:close() return filename end end local function find_in_path(start) local _1_0 = fullpath:match(pattern, start) if (nil ~= _1_0) then local path = _1_0 return (try_path(path) or find_in_path((start + #path + 1))) end end return find_in_path(1) end local function make_searcher(options) local function _1_(module_name) local opts = utils.copy(utils.root.options) for k, v in pairs((options or {})) do opts[k] = v end opts["module-name"] = module_name local _2_0 = search_module(module_name) if (nil ~= _2_0) then local filename = _2_0 local function _3_(...) return utils["fennel-module"].dofile(filename, opts, ...) end return _3_, filename end end return _1_ end local function macro_globals(env, globals) local allowed = current_global_names(env) for _, k in pairs((globals or {})) do table.insert(allowed, k) end return allowed end local function default_macro_searcher(module_name) local _1_0 = search_module(module_name) if (nil ~= _1_0) then local filename = _1_0 local function _2_(...) return utils["fennel-module"].dofile(filename, {env = "_COMPILER"}, ...) end return _2_, filename end end local macro_searchers = {default_macro_searcher} local function search_macro_module(modname, n) local _1_0 = macro_searchers[n] if (nil ~= _1_0) then local f = _1_0 local _2_0, _3_0 = f(modname) if ((nil ~= _2_0) and true) then local loader = _2_0 local _3ffilename = _3_0 return loader, _3ffilename else local _ = _2_0 return search_macro_module(modname, (n + 1)) end end end local macro_loaded = {} local function metadata_only_fennel(modname) if ((modname == "fennel.macros") or (package and package.loaded and ("table" == type(package.loaded[modname])) and (package.loaded[modname].metadata == compiler.metadata))) then return {metadata = compiler.metadata} end end local function _1_(modname) local function _2_() local loader, filename = search_macro_module(modname, 1) compiler.assert(loader, (modname .. " module not found.")) macro_loaded[modname] = loader(modname, filename) return macro_loaded[modname] end return (macro_loaded[modname] or metadata_only_fennel(modname) or _2_()) end safe_require = _1_ local function add_macros(macros_2a, ast, scope) compiler.assert(utils["table?"](macros_2a), "expected macros to be table", ast) for k, v in pairs(macros_2a) do compiler.assert((type(v) == "function"), "expected each macro to be function", ast) scope.macros[k] = v end return nil end SPECIALS["require-macros"] = function(ast, scope, parent, real_ast) compiler.assert((#ast == 2), "Expected one module name argument", (real_ast or ast)) local filename = (ast[2].filename or ast.filename) local modname_chunk = load_code(compiler.compile(ast[2]), nil, filename) local modname = modname_chunk(utils.root.options["module-name"], filename) compiler.assert((type(modname) == "string"), "module name must compile to string", (real_ast or ast)) if not macro_loaded[modname] then local env = make_compiler_env(ast, scope, parent) local loader, filename0 = search_macro_module(modname, 1) compiler.assert(loader, (modname .. " module not found."), ast) macro_loaded[modname] = loader(modname, filename0) end return add_macros(macro_loaded[modname], ast, scope, parent) end doc_special("require-macros", {"macro-module-name"}, "Load given module and use its contents as macro definitions in current scope.\nMacro module should return a table of macro functions with string keys.\nConsider using import-macros instead as it is more flexible.") local function emit_included_fennel(src, path, opts, sub_chunk) local subscope = compiler["make-scope"](utils.root.scope.parent) local forms = {} if utils.root.options.requireAsInclude then subscope.specials.require = compiler["require-include"] end for _, val in parser.parser(parser["string-stream"](src), path) do table.insert(forms, val) end for i = 1, #forms do local subopts = nil if (i == #forms) then subopts = {tail = true} else subopts = {nval = 0} end utils["propagate-options"](opts, subopts) compiler.compile1(forms[i], subscope, sub_chunk, subopts) end return nil end local function include_path(ast, opts, path, mod, fennel_3f) utils.root.scope.includes[mod] = "fnl/loading" local src = nil do local f = assert(io.open(path)) local function close_handlers_0_(ok_0_, ...) f:close() if ok_0_ then return ... else return error(..., 0) end end local function _2_() return f:read("*all"):gsub("[\13\n]*$", "") end src = close_handlers_0_(xpcall(_2_, (package.loaded.fennel or debug).traceback)) end local ret = utils.expr(("require(\"" .. mod .. "\")"), "statement") local target = ("package.preload[%q]"):format(mod) local preload_str = (target .. " = " .. target .. " or function(...)") local temp_chunk, sub_chunk = {}, {} compiler.emit(temp_chunk, preload_str, ast) compiler.emit(temp_chunk, sub_chunk) compiler.emit(temp_chunk, "end", ast) for i, v in ipairs(temp_chunk) do table.insert(utils.root.chunk, i, v) end if fennel_3f then emit_included_fennel(src, path, opts, sub_chunk) else compiler.emit(sub_chunk, src, ast) end utils.root.scope.includes[mod] = ret return ret end local function include_circular_fallback(mod, modexpr, fallback, ast) if (utils.root.scope.includes[mod] == "fnl/loading") then compiler.assert(fallback, "circular include detected", ast) return fallback(modexpr) end end SPECIALS.include = function(ast, scope, parent, opts) compiler.assert((#ast == 2), "expected one argument", ast) local modexpr = compiler.compile1(ast[2], scope, parent, {nval = 1})[1] if ((modexpr.type ~= "literal") or ((modexpr[1]):byte() ~= 34)) then if opts.fallback then return opts.fallback(modexpr) else return compiler.assert(false, "module name must be string literal", ast) end else local mod = load_code(("return " .. modexpr[1]))() local function _3_() local _2_0 = search_module(mod) if (nil ~= _2_0) then local fennel_path = _2_0 return include_path(ast, opts, fennel_path, mod, true) else local _ = _2_0 local lua_path = search_module(mod, package.path) if lua_path then return include_path(ast, opts, lua_path, mod, false) elseif opts.fallback then return opts.fallback(modexpr) else return compiler.assert(false, ("module not found " .. mod), ast) end end end return (include_circular_fallback(mod, modexpr, opts.fallback, ast) or utils.root.scope.includes[mod] or _3_()) end end doc_special("include", {"module-name-literal"}, "Like require but load the target module during compilation and embed it in the\nLua output. The module must be a string literal and resolvable at compile time.") local function eval_compiler_2a(ast, scope, parent) local env = make_compiler_env(ast, scope, parent) local opts = utils.copy(utils.root.options) opts.scope = compiler["make-scope"](compiler.scopes.compiler) opts.allowedGlobals = macro_globals(env, current_global_names()) return load_code(compiler.compile(ast, opts), wrap_env(env))(opts["module-name"], ast.filename) end SPECIALS.macros = function(ast, scope, parent) compiler.assert((#ast == 2), "Expected one table argument", ast) return add_macros(eval_compiler_2a(ast[2], scope, parent), ast, scope, parent) end doc_special("macros", {"{:macro-name-1 (fn [...] ...) ... :macro-name-N macro-body-N}"}, "Define all functions in the given table as macros local to the current scope.") SPECIALS["eval-compiler"] = function(ast, scope, parent) local old_first = ast[1] ast[1] = utils.sym("do") local val = eval_compiler_2a(ast, scope, parent) ast[1] = old_first return val end doc_special("eval-compiler", {"..."}, "Evaluate the body at compile-time. Use the macro system instead if possible.") return {["current-global-names"] = current_global_names, ["load-code"] = load_code, ["macro-loaded"] = macro_loaded, ["macro-searchers"] = macro_searchers, ["make-compiler-env"] = make_compiler_env, ["make-searcher"] = make_searcher, ["search-module"] = search_module, ["wrap-env"] = wrap_env, doc = doc_2a} end package.preload["fennel.compiler"] = package.preload["fennel.compiler"] or function(...) local utils = require("fennel.utils") local parser = require("fennel.parser") local friend = require("fennel.friend") local unpack = (table.unpack or _G.unpack) local scopes = {} local function make_scope(parent) local parent0 = (parent or scopes.global) local _0_ if parent0 then _0_ = ((parent0.depth or 0) + 1) else _0_ = 0 end return {autogensyms = {}, depth = _0_, hashfn = (parent0 and parent0.hashfn), includes = setmetatable({}, {__index = (parent0 and parent0.includes)}), macros = setmetatable({}, {__index = (parent0 and parent0.macros)}), manglings = setmetatable({}, {__index = (parent0 and parent0.manglings)}), parent = parent0, refedglobals = setmetatable({}, {__index = (parent0 and parent0.refedglobals)}), specials = setmetatable({}, {__index = (parent0 and parent0.specials)}), symmeta = setmetatable({}, {__index = (parent0 and parent0.symmeta)}), unmanglings = setmetatable({}, {__index = (parent0 and parent0.unmanglings)}), vararg = (parent0 and parent0.vararg)} end local function assert_msg(ast, msg) local ast_tbl = nil if ("table" == type(ast)) then ast_tbl = ast else ast_tbl = {} end local m = getmetatable(ast) local filename = ((m and m.filename) or ast_tbl.filename or "unknown") local line = ((m and m.line) or ast_tbl.line or "?") local target = nil local function _1_() if utils["sym?"](ast_tbl[1]) then return utils.deref(ast_tbl[1]) else return (ast_tbl[1] or "()") end end target = tostring(_1_()) return string.format("Compile error in '%s' %s:%s: %s", target, filename, line, msg) end local function assert_compile(condition, msg, ast) if not condition then local _0_ = (utils.root.options or {}) local source = _0_["source"] local unfriendly = _0_["unfriendly"] utils.root.reset() if unfriendly then error(assert_msg(ast, msg), 0) else friend["assert-compile"](condition, msg, ast, source) end end return condition end scopes.global = make_scope() scopes.global.vararg = true scopes.compiler = make_scope(scopes.global) scopes.macro = scopes.global local serialize_subst = {["\11"] = "\\v", ["\12"] = "\\f", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\n"] = "n"} local function serialize_string(str) local function _0_(_241) return ("\\" .. _241:byte()) end return string.gsub(string.gsub(string.format("%q", str), ".", serialize_subst), "[\128-\255]", _0_) end local function global_mangling(str) if utils["valid-lua-identifier?"](str) then return str else local function _0_(_241) return string.format("_%02x", _241:byte()) end return ("__fnl_global__" .. str:gsub("[^%w]", _0_)) end end local function global_unmangling(identifier) local _0_0 = string.match(identifier, "^__fnl_global__(.*)$") if (nil ~= _0_0) then local rest = _0_0 local _1_0 = nil local function _2_(_241) return string.char(tonumber(_241:sub(2), 16)) end _1_0 = string.gsub(rest, "_[%da-f][%da-f]", _2_) return _1_0 else local _ = _0_0 return identifier end end local allowed_globals = nil local function global_allowed(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, temp_manglings) assert_compile(not utils["multi-sym?"](str), ("unexpected multi symbol " .. str), ast) local raw = nil if (utils["lua-keywords"][str] or str:match("^%d")) then raw = ("_" .. str) else raw = str end local mangling = nil local function _1_(_241) return string.format("_%02x", _241:byte()) end mangling = string.gsub(string.gsub(raw, "-", "_"), "[^%w_]", _1_) local unique = unique_mangling(mangling, mangling, scope, 0) scope.unmanglings[unique] = str do local manglings = (temp_manglings or scope.manglings) manglings[str] = unique end return unique end local function apply_manglings(scope, new_manglings, ast) for raw, mangled in pairs(new_manglings) do assert_compile(not scope.refedglobals[mangled], ("use of global " .. raw .. " is aliased by a local"), ast) scope.manglings[raw] = mangled end return nil end local function combine_parts(parts, scope) local ret = (scope.manglings[parts[1]] or global_mangling(parts[1])) for i = 2, #parts do if utils["valid-lua-identifier?"](parts[i]) then if (parts["multi-sym-method-call"] and (i == #parts)) then ret = (ret .. ":" .. parts[i]) else ret = (ret .. "." .. parts[i]) end else ret = (ret .. "[" .. serialize_string(parts[i]) .. "]") end end return ret end local function gensym(scope, base) local append, mangling = 0, ((base or "") .. "_0_") while scope.unmanglings[mangling] do mangling = ((base or "") .. "_" .. append .. "_") append = (append + 1) end scope.unmanglings[mangling] = (base or true) return mangling end local function autogensym(base, scope) local _0_0 = utils["multi-sym?"](base) if (nil ~= _0_0) then local parts = _0_0 parts[1] = autogensym(parts[1], scope) return table.concat(parts, ((parts["multi-sym-method-call"] and ":") or ".")) else local _ = _0_0 local function _1_() local mangling = gensym(scope, base:sub(1, ( - 2))) scope.autogensyms[base] = mangling return mangling end return (scope.autogensyms[base] or _1_()) end end local already_warned = {} local function check_binding_valid(symbol, scope, ast) local name = utils.deref(symbol) if (io and io.stderr and name:find("&") and not already_warned[symbol]) then already_warned[symbol] = true do end (io.stderr):write(("-- Warning: & will not be allowed in identifier names in " .. "future versions: " .. (symbol.filename or "unknown") .. ":" .. (symbol.line or "?") .. "\n")) end assert_compile(not (scope.specials[name] or scope.macros[name]), ("local %s was overshadowed by a special form or macro"):format(name), ast) return assert_compile(not utils["quoted?"](symbol), string.format("macro tried to bind %s without gensym", name), symbol) end local function declare_local(symbol, meta, scope, ast, temp_manglings) check_binding_valid(symbol, scope, ast) local name = utils.deref(symbol) assert_compile(not utils["multi-sym?"](name), ("unexpected multi symbol " .. name), ast) scope.symmeta[name] = meta return local_mangling(name, scope, ast, temp_manglings) end local function hashfn_arg_name(name, multi_sym_parts, scope) if not scope.hashfn then return nil elseif (name == "$") then return "$1" elseif multi_sym_parts then if (multi_sym_parts and (multi_sym_parts[1] == "$")) then multi_sym_parts[1] = "$1" end return table.concat(multi_sym_parts, ".") end end local function symbol_to_expression(symbol, scope, reference_3f) utils.hook("symbol-to-expression", symbol, scope, reference_3f) local name = symbol[1] local multi_sym_parts = utils["multi-sym?"](name) local name0 = (hashfn_arg_name(name, multi_sym_parts, scope) or name) local parts = (multi_sym_parts or {name0}) local etype = (((#parts > 1) and "expression") or "sym") local local_3f = scope.manglings[parts[1]] if (local_3f and scope.symmeta[parts[1]]) then scope.symmeta[parts[1]]["used"] = true end assert_compile((not reference_3f or local_3f or global_allowed(parts[1])), ("unknown global in strict mode: " .. tostring(parts[1])), symbol) if (allowed_globals and not local_3f) then utils.root.scope.refedglobals[parts[1]] = true end return utils.expr(combine_parts(parts, scope), etype) end local function emit(chunk, out, ast) if (type(out) == "table") then return table.insert(chunk, out) else return table.insert(chunk, {ast = ast, leaf = out}) end end local function peephole(chunk) if chunk.leaf then return chunk elseif ((#chunk >= 3) and (chunk[(#chunk - 2)].leaf == "do") and not chunk[(#chunk - 1)].leaf and (chunk[#chunk].leaf == "end")) then local kid = peephole(chunk[(#chunk - 1)]) local new_chunk = {ast = chunk.ast} for i = 1, (#chunk - 3) do table.insert(new_chunk, peephole(chunk[i])) end for i = 1, #kid do table.insert(new_chunk, kid[i]) end return new_chunk else return utils.map(chunk, peephole) end end local function ast_source(ast) local m = getmetatable(ast) return ((m and m.line and m) or (("table" == type(ast)) and ast) or {}) end local function flatten_chunk_correlated(main_chunk) local function flatten(chunk, out, last_line, file) local last_line0 = last_line if chunk.leaf then out[last_line0] = ((out[last_line0] or "") .. " " .. chunk.leaf) else for _, subchunk in ipairs(chunk) do if (subchunk.leaf or (#subchunk > 0)) then local source = ast_source(subchunk.ast) if (file == source.file) 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, main_chunk.file) for i = 1, last do if (out[i] == nil) then out[i] = "" end end return table.concat(out, "\n") end local function flatten_chunk(sm, chunk, tab, depth) if chunk.leaf then local code = chunk.leaf local info = chunk.ast if sm then table.insert(sm, {(info and info.filename), (info and info.line)}) end return code else local tab0 = nil do local _0_0 = tab if (_0_0 == true) then tab0 = " " elseif (_0_0 == false) then tab0 = "" elseif (_0_0 == tab) then tab0 = tab elseif (_0_0 == nil) then tab0 = "" else tab0 = nil end end local function parter(c) if (c.leaf or (#c > 0)) then local sub = flatten_chunk(sm, c, tab0, (depth + 1)) if (depth > 0) then return (tab0 .. sub:gsub("\n", ("\n" .. tab0))) else return sub end end end return table.concat(utils.map(chunk, parter), "\n") end end local fennel_sourcemap = {} local function make_short_src(source) local source0 = source:gsub("\n", " ") if (#source0 <= 49) then return ("[fennel \"" .. source0 .. "\"]") else return ("[fennel \"" .. source0:sub(1, 46) .. "...\"]") end end local function flatten(chunk, options) local chunk0 = peephole(chunk) if options.correlate then return flatten_chunk_correlated(chunk0), {} else local sm = {} local ret = flatten_chunk(sm, chunk0, options.indent, 0) if sm then sm.short_src = (options.filename or make_short_src((options.source or ret))) if options.filename then sm.key = ("@" .. options.filename) else sm.key = ret end fennel_sourcemap[sm.key] = sm end return ret, sm end end local function make_metadata() local function _0_(self, tgt, key) if self[tgt] then return self[tgt][key] end end local function _1_(self, tgt, key, value) self[tgt] = (self[tgt] or {}) self[tgt][key] = value return tgt end local function _2_(self, tgt, ...) local kv_len = select("#", ...) local kvs = {...} if ((kv_len % 2) ~= 0) then error("metadata:setall() expected even number of k/v pairs") end self[tgt] = (self[tgt] or {}) for i = 1, kv_len, 2 do self[tgt][kvs[i]] = kvs[(i + 1)] end return tgt end return setmetatable({}, {__index = {get = _0_, set = _1_, setall = _2_}, __mode = "k"}) end local function exprs1(exprs) return table.concat(utils.map(exprs, 1), ", ") end local function keep_side_effects(exprs, chunk, start, ast) for j = (start or 1), #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 unambiguous_code = nil if (code:byte() == 40) then unambiguous_code = ("do end " .. code) else unambiguous_code = code end emit(chunk, unambiguous_code, ast) end end return nil end local function handle_compile_opts(exprs, parent, opts, ast) if opts.nval then local n = opts.nval local len = #exprs if (n ~= len) then if (len > n) then keep_side_effects(exprs, parent, (n + 1), ast) for i = (n + 1), len do exprs[i] = nil end else for i = (#exprs + 1), n do exprs[i] = utils.expr("nil", "literal") end end end end if opts.tail then emit(parent, string.format("return %s", exprs1(exprs)), ast) end if opts.target then local result = exprs1(exprs) local function _2_() if (result == "") then return "nil" else return result end end emit(parent, string.format("%s = %s", opts.target, _2_()), ast) end if (opts.tail or opts.target) then return {returned = true} else local _3_0 = exprs _3_0["returned"] = true return _3_0 end end local function find_macro(ast, scope, multi_sym_parts) local function find_in_table(t, i) if (i <= #multi_sym_parts) then return find_in_table((utils["table?"](t) and t[multi_sym_parts[i]]), (i + 1)) else return t end end local macro_2a = (utils["sym?"](ast[1]) and scope.macros[utils.deref(ast[1])]) if (not macro_2a and multi_sym_parts) then local nested_macro = find_in_table(scope.macros, 1) assert_compile((not scope.macros[multi_sym_parts[1]] or (type(nested_macro) == "function")), "macro not found in imported macro module", ast) return nested_macro else return macro_2a end end local function macroexpand_2a(ast, scope, once) local _0_0 = nil if utils["list?"](ast) then _0_0 = find_macro(ast, scope, utils["multi-sym?"](ast[1])) else _0_0 = nil end if (_0_0 == false) then return ast elseif (nil ~= _0_0) then local macro_2a = _0_0 local old_scope = scopes.macro local _ = nil scopes.macro = scope _ = nil local ok, transformed = nil, nil local function _2_() return macro_2a(unpack(ast, 2)) end ok, transformed = xpcall(_2_, debug.traceback) scopes.macro = old_scope assert_compile(ok, transformed, ast) if (once or not transformed) then return transformed else return macroexpand_2a(transformed, scope) end else local _ = _0_0 return ast end end local function compile_special(ast, scope, parent, opts, special) local exprs = (special(ast, scope, parent, opts) or utils.expr("nil", "literal")) local exprs0 = nil if (type(exprs) == "string") then exprs0 = utils.expr(exprs, "expression") else exprs0 = exprs end local exprs2 = nil if utils["expr?"](exprs0) then exprs2 = {exprs0} else exprs2 = exprs0 end if not exprs2.returned then return handle_compile_opts(exprs2, parent, opts, ast) elseif (opts.tail or opts.target) then return {returned = true} else return exprs2 end end local function compile_function_call(ast, scope, parent, opts, compile1, len) local fargs = {} local fcallee = compile1(ast[1], scope, parent, {nval = 1})[1] assert_compile((fcallee.type ~= "literal"), ("cannot call literal value " .. tostring(ast[1])), ast) for i = 2, len do local subexprs = nil local _0_ if (i ~= len) then _0_ = 1 else _0_ = nil end subexprs = compile1(ast[i], scope, parent, {nval = _0_}) table.insert(fargs, (subexprs[1] or utils.expr("nil", "literal"))) if (i == len) then for j = 2, #subexprs do table.insert(fargs, subexprs[j]) end else keep_side_effects(subexprs, parent, 2, ast[i]) end end local call = string.format("%s(%s)", tostring(fcallee), exprs1(fargs)) return handle_compile_opts({utils.expr(call, "statement")}, parent, opts, ast) end local function compile_call(ast, scope, parent, opts, compile1) utils.hook("call", ast, scope) local len = #ast local first = ast[1] local multi_sym_parts = utils["multi-sym?"](first) local special = (utils["sym?"](first) and scope.specials[utils.deref(first)]) assert_compile((len > 0), "expected a function, macro, or special to call", ast) if special then return compile_special(ast, scope, parent, opts, special) elseif (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]) then local table_with_method = table.concat({unpack(multi_sym_parts, 1, (#multi_sym_parts - 1))}, ".") local method_to_call = multi_sym_parts[#multi_sym_parts] local new_ast = utils.list(utils.sym(":", nil, scope), utils.sym(table_with_method, nil, scope), method_to_call, select(2, unpack(ast))) return compile1(new_ast, scope, parent, opts) else return compile_function_call(ast, scope, parent, opts, compile1, len) end end local function compile_varg(ast, scope, parent, opts) assert_compile(scope.vararg, "unexpected vararg", ast) return handle_compile_opts({utils.expr("...", "varg")}, parent, opts, ast) end local function compile_sym(ast, scope, parent, opts) local multi_sym_parts = utils["multi-sym?"](ast) assert_compile(not (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]), "multisym method calls may only be in call position", ast) local e = nil if (ast[1] == "nil") then e = utils.expr("nil", "literal") else e = symbol_to_expression(ast, scope, true) end return handle_compile_opts({e}, parent, opts, ast) end local function serialize_number(n) local _0_0 = string.gsub(tostring(n), ",", ".") return _0_0 end local function compile_scalar(ast, _scope, parent, opts) local serialize = nil do local _0_0 = type(ast) if (_0_0 == "nil") then serialize = tostring elseif (_0_0 == "boolean") then serialize = tostring elseif (_0_0 == "string") then serialize = serialize_string elseif (_0_0 == "number") then serialize = serialize_number else serialize = nil end end return handle_compile_opts({utils.expr(serialize(ast), "literal")}, parent, opts) end local function compile_table(ast, scope, parent, opts, compile1) local buffer = {} for i = 1, #ast do local nval = ((i ~= #ast) and 1) table.insert(buffer, exprs1(compile1(ast[i], scope, parent, {nval = nval}))) end local function write_other_values(k) if ((type(k) ~= "number") or (math.floor(k) ~= k) or (k < 1) or (k > #ast)) then if ((type(k) == "string") and utils["valid-lua-identifier?"](k)) then return {k, k} else local _0_ = compile1(k, scope, parent, {nval = 1}) local compiled = _0_[1] local kstr = ("[" .. tostring(compiled) .. "]") return {kstr, k} end end end do local keys = nil do local _0_0 = utils.kvmap(ast, write_other_values) local function _1_(a, b) return (a[1] < b[1]) end table.sort(_0_0, _1_) keys = _0_0 end local function _1_(_2_0) local _3_ = _2_0 local k1 = _3_[1] local k2 = _3_[2] local _4_ = compile1(ast[k2], scope, parent, {nval = 1}) local v = _4_[1] return string.format("%s = %s", k1, tostring(v)) end utils.map(keys, _1_, buffer) end return handle_compile_opts({utils.expr(("{" .. table.concat(buffer, ", ") .. "}"), "expression")}, parent, opts, ast) end local function compile1(ast, scope, parent, opts) local opts0 = (opts or {}) local ast0 = macroexpand_2a(ast, scope) if utils["list?"](ast0) then return compile_call(ast0, scope, parent, opts0, compile1) elseif utils["varg?"](ast0) then return compile_varg(ast0, scope, parent, opts0) elseif utils["sym?"](ast0) then return compile_sym(ast0, scope, parent, opts0) elseif (type(ast0) == "table") then return compile_table(ast0, scope, parent, opts0, compile1) elseif ((type(ast0) == "nil") or (type(ast0) == "boolean") or (type(ast0) == "number") or (type(ast0) == "string")) then return compile_scalar(ast0, scope, parent, opts0) else return assert_compile(false, ("could not compile value of type " .. type(ast0)), ast0) end end local function destructure(to, from, ast, scope, parent, opts) local opts0 = (opts or {}) local _0_ = opts0 local declaration = _0_["declaration"] local forceglobal = _0_["forceglobal"] local forceset = _0_["forceset"] local isvar = _0_["isvar"] local symtype = _0_["symtype"] local symtype0 = ("_" .. (symtype or "dst")) local setter = nil if declaration then setter = "local %s = %s" else setter = "%s = %s" end local new_manglings = {} local function getname(symbol, up1) local raw = symbol[1] assert_compile(not (opts0.nomulti and utils["multi-sym?"](raw)), ("unexpected multi symbol " .. raw), up1) if declaration then return declare_local(symbol, nil, scope, symbol, new_manglings) else local parts = (utils["multi-sym?"](raw) or {raw}) local meta = scope.symmeta[parts[1]] if ((#parts == 1) and not forceset) then assert_compile(not (forceglobal and meta), string.format("global %s conflicts with local", tostring(symbol)), symbol) assert_compile(not (meta and not meta.var), ("expected var " .. raw), symbol) assert_compile((meta or not opts0.noundef), ("expected local " .. parts[1]), symbol) end if forceglobal then assert_compile(not scope.symmeta[scope.unmanglings[raw]], ("global " .. raw .. " conflicts with local"), symbol) scope.manglings[raw] = global_mangling(raw) scope.unmanglings[global_mangling(raw)] = raw if allowed_globals then table.insert(allowed_globals, raw) end end return symbol_to_expression(symbol, scope)[1] end end local function compile_top_target(lvalues) local inits = nil local function _2_(_241) if scope.manglings[_241] then return _241 else return "nil" end end inits = utils.map(lvalues, _2_) local init = table.concat(inits, ", ") local lvalue = table.concat(lvalues, ", ") local plen, plast = #parent, parent[#parent] local ret = compile1(from, scope, parent, {target = lvalue}) if declaration then for pi = plen, #parent do if (parent[pi] == plast) then plen = pi end end if ((#parent == (plen + 1)) and parent[#parent].leaf) then parent[#parent]["leaf"] = ("local " .. parent[#parent].leaf) elseif (init == "nil") then table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue)}) else table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue .. " = " .. init)}) end end return ret end local function destructure_sym(left, rightexprs, up1, top_3f) local lname = getname(left, up1) check_binding_valid(left, scope, left) if top_3f then compile_top_target({lname}) else emit(parent, setter:format(lname, exprs1(rightexprs)), left) end if declaration then scope.symmeta[utils.deref(left)] = {var = isvar} return nil end end local function destructure_table(left, rightexprs, top_3f, destructure1) local s = gensym(scope, symtype0) local right = nil do local _2_0 = nil if top_3f then _2_0 = exprs1(compile1(from, scope, parent)) else _2_0 = exprs1(rightexprs) end if (_2_0 == "") then right = "nil" elseif (nil ~= _2_0) then local right0 = _2_0 right = right0 else right = nil end end emit(parent, string.format("local %s = %s", s, right), left) for k, v in utils.stablepairs(left) do if not (("number" == type(k)) and tostring(left[(k - 1)]):find("^&")) then if (utils["sym?"](v) and (utils.deref(v) == "&")) then local unpack_str = "{(table.unpack or unpack)(%s, %s)}" local formatted = string.format(unpack_str, s, k) local subexpr = utils.expr(formatted, "expression") assert_compile((utils["sequence?"](left) and (nil == left[(k + 2)])), "expected rest argument before last parameter", left) destructure1(left[(k + 1)], {subexpr}, left) elseif (utils["sym?"](k) and (utils.deref(k) == "&as")) then destructure_sym(v, {utils.expr(tostring(s))}, left) elseif (utils["sequence?"](left) and (utils.deref(v) == "&as")) then local _, next_sym, trailing = select(k, unpack(left)) assert_compile((nil == trailing), "expected &as argument before last parameter", left) destructure_sym(next_sym, {utils.expr(tostring(s))}, left) else local key = nil if (type(k) == "string") then key = serialize_string(k) else key = k end local subexpr = utils.expr(string.format("%s[%s]", s, key), "expression") destructure1(v, {subexpr}, left) end end end return nil end local function destructure_values(left, up1, top_3f, destructure1) local left_names, tables = {}, {} for i, name in ipairs(left) do if utils["sym?"](name) then table.insert(left_names, getname(name, up1)) else local symname = gensym(scope, symtype0) table.insert(left_names, symname) tables[i] = {name, utils.expr(symname, "sym")} end end assert_compile(top_3f, "can't nest multi-value destructuring", left) compile_top_target(left_names) if declaration then for _, sym in ipairs(left) do scope.symmeta[utils.deref(sym)] = {var = isvar} end end for _, pair in utils.stablepairs(tables) do destructure1(pair[1], {pair[2]}, left) end return nil end local function destructure1(left, rightexprs, up1, top_3f) if (utils["sym?"](left) and (left[1] ~= "nil")) then destructure_sym(left, rightexprs, up1, top_3f) elseif utils["table?"](left) then destructure_table(left, rightexprs, top_3f, destructure1) elseif utils["list?"](left) then destructure_values(left, up1, top_3f, destructure1) else assert_compile(false, string.format("unable to bind %s %s", type(left), tostring(left)), (((type(up1[2]) == "table") and up1[2]) or up1)) end if top_3f then return {returned = true} end end local ret = destructure1(to, nil, ast, true) utils.hook("destructure", from, to, scope) apply_manglings(scope, new_manglings, ast) return ret end local function require_include(ast, scope, parent, opts) opts.fallback = function(e) return utils.expr(string.format("require(%s)", tostring(e)), "statement") end return scopes.global.specials.include(ast, scope, parent, opts) end local function compile_stream(strm, options) local opts = utils.copy(options) local old_globals = allowed_globals local scope = (opts.scope or make_scope(scopes.global)) local vals = {} local chunk = {} local _0_ = utils.root _0_["set-reset"](_0_) allowed_globals = opts.allowedGlobals if (opts.indent == nil) then opts.indent = " " end if opts.requireAsInclude then scope.specials.require = require_include end utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts for _, val in parser.parser(strm, opts.filename, opts) do table.insert(vals, val) end for i = 1, #vals do local exprs = compile1(vals[i], scope, chunk, {nval = (((i < #vals) and 0) or nil), tail = (i == #vals)}) keep_side_effects(exprs, chunk, nil, vals[i]) end allowed_globals = old_globals utils.root.reset() return flatten(chunk, opts) end local function compile_string(str, opts) return compile_stream(parser["string-stream"](str), (opts or {})) end local function compile(ast, opts) local opts0 = utils.copy(opts) local old_globals = allowed_globals local chunk = {} local scope = (opts0.scope or make_scope(scopes.global)) local _0_ = utils.root _0_["set-reset"](_0_) allowed_globals = opts0.allowedGlobals if (opts0.indent == nil) then opts0.indent = " " end if opts0.requireAsInclude then scope.specials.require = require_include end utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts0 local exprs = compile1(ast, scope, chunk, {tail = true}) keep_side_effects(exprs, chunk, nil, ast) allowed_globals = old_globals utils.root.reset() return flatten(chunk, opts0) end local function traceback_frame(info) if ((info.what == "C") and info.name) then return string.format(" [C]: in function '%s'", info.name) elseif (info.what == "C") then return " [C]: in ?" else local remap = fennel_sourcemap[info.source] if (remap and remap[info.currentline]) then if remap[info.currentline][1] then info.short_src = fennel_sourcemap[("@" .. remap[info.currentline][1])].short_src else info.short_src = remap.short_src end info.currentline = (remap[info.currentline][2] or -1) end if (info.what == "Lua") then local function _1_() if info.name then return ("'" .. info.name .. "'") else return "?" end end return string.format(" %s:%d: in function %s", info.short_src, info.currentline, _1_()) elseif (info.short_src == "(tail call)") then return " (tail call)" else return string.format(" %s:%d: in main chunk", info.short_src, info.currentline) end end end local function traceback(msg, start) local msg0 = (msg or "") if ((msg0:find("^Compile error") or msg0:find("^Parse error")) and not utils["debug-on?"]("trace")) then return msg0 else local lines = {} if (msg0:find("^Compile error") or msg0:find("^Parse error")) then table.insert(lines, msg0) else local newmsg = msg0:gsub("^[^:]*:%d+:%s+", "runtime error: ") table.insert(lines, newmsg) end table.insert(lines, "stack traceback:") local done_3f, level = false, (start or 2) while not done_3f do do local _1_0 = debug.getinfo(level, "Sln") if (_1_0 == nil) then done_3f = true elseif (nil ~= _1_0) then local info = _1_0 table.insert(lines, traceback_frame(info)) end end level = (level + 1) end return table.concat(lines, "\n") end end local function entry_transform(fk, fv) local function _0_(k, v) if (type(k) == "number") then return k, fv(v) else return fk(k), fv(v) end end return _0_ end local function mixed_concat(t, joiner) local seen = {} local ret, s = "", "" for k, v in ipairs(t) do table.insert(seen, k) ret = (ret .. s .. v) s = joiner end for k, v in utils.stablepairs(t) do if not seen[k] then ret = (ret .. s .. "[" .. k .. "]" .. "=" .. v) s = joiner end end return ret end local function do_quote(form, scope, parent, runtime_3f) local function q(x) return do_quote(x, scope, parent, runtime_3f) end if utils["varg?"](form) then assert_compile(not runtime_3f, "quoted ... may only be used at compile time", form) return "_VARARG" elseif utils["sym?"](form) then local filename = nil if form.filename then filename = string.format("%q", form.filename) else filename = "nil" end local symstr = utils.deref(form) assert_compile(not runtime_3f, "symbols may only be used at compile time", form) if (symstr:find("#$") or symstr:find("#[:.]")) then return string.format("sym('%s', {filename=%s, line=%s})", autogensym(symstr, scope), filename, (form.line or "nil")) else return string.format("sym('%s', {quoted=true, filename=%s, line=%s})", symstr, filename, (form.line or "nil")) end elseif (utils["list?"](form) and utils["sym?"](form[1]) and (utils.deref(form[1]) == "unquote")) then local payload = form[2] local res = unpack(compile1(payload, scope, parent)) return res[1] elseif utils["list?"](form) then local mapped = nil local function _0_() return nil end mapped = utils.kvmap(form, entry_transform(_0_, q)) local filename = nil if form.filename then filename = string.format("%q", form.filename) else filename = "nil" end assert_compile(not runtime_3f, "lists may only be used at compile time", form) return string.format(("setmetatable({filename=%s, line=%s, bytestart=%s, %s}" .. ", getmetatable(list()))"), filename, (form.line or "nil"), (form.bytestart or "nil"), mixed_concat(mapped, ", ")) elseif utils["sequence?"](form) then local mapped = utils.kvmap(form, entry_transform(q, q)) local source = getmetatable(form) local filename = nil if source.filename then filename = string.format("%q", source.filename) else filename = "nil" end local _1_ if source then _1_ = source.line else _1_ = "nil" end return string.format("setmetatable({%s}, {filename=%s, line=%s, sequence=%s})", mixed_concat(mapped, ", "), filename, _1_, "(getmetatable(sequence()))['sequence']") elseif (type(form) == "table") then local mapped = utils.kvmap(form, entry_transform(q, q)) local source = getmetatable(form) local filename = nil if source.filename then filename = string.format("%q", source.filename) else filename = "nil" end local function _1_() if source then return source.line else return "nil" end end return string.format("setmetatable({%s}, {filename=%s, line=%s})", mixed_concat(mapped, ", "), filename, _1_()) elseif (type(form) == "string") then return serialize_string(form) else return tostring(form) end end return {["apply-manglings"] = apply_manglings, ["compile-stream"] = compile_stream, ["compile-string"] = compile_string, ["declare-local"] = declare_local, ["do-quote"] = do_quote, ["global-mangling"] = global_mangling, ["global-unmangling"] = global_unmangling, ["keep-side-effects"] = keep_side_effects, ["make-scope"] = make_scope, ["require-include"] = require_include, ["symbol-to-expression"] = symbol_to_expression, assert = assert_compile, autogensym = autogensym, compile = compile, compile1 = compile1, destructure = destructure, emit = emit, gensym = gensym, macroexpand = macroexpand_2a, metadata = make_metadata(), scopes = scopes, traceback = traceback} end package.preload["fennel.friend"] = package.preload["fennel.friend"] or function(...) local function ast_source(ast) local m = getmetatable(ast) return ((m and m.line and m) or (("table" == type(ast)) and ast) or {}) end local suggestions = {["$ and $... in hashfn are mutually exclusive"] = {"modifying the hashfn so it only contains $... or $, $1, $2, $3, etc"}, ["can't start multisym segment with a digit"] = {"removing the digit", "adding a non-digit before the digit"}, ["cannot call literal value"] = {"checking for typos", "checking for a missing function name"}, ["could not compile value of type "] = {"debugging the macro you're calling to return a list or table"}, ["could not read number (.*)"] = {"removing the non-digit character", "beginning the identifier with a non-digit if it is not meant to be a number"}, ["expected a function.* to call"] = {"removing the empty parentheses", "using square brackets if you want an empty table"}, ["expected binding table"] = {"placing a table here in square brackets containing identifiers to bind"}, ["expected body expression"] = {"putting some code in the body of this form after the bindings"}, ["expected each macro to be function"] = {"ensuring that the value for each key in your macros table contains a function", "avoid defining nested macro tables"}, ["expected even number of name/value bindings"] = {"finding where the identifier or value is missing"}, ["expected even number of values in table literal"] = {"removing a key", "adding a value"}, ["expected local"] = {"looking for a typo", "looking for a local which is used out of its scope"}, ["expected macros to be table"] = {"ensuring your macro definitions return a table"}, ["expected parameters"] = {"adding function parameters as a list of identifiers in brackets"}, ["expected rest argument before last parameter"] = {"moving & to right before the final identifier when destructuring"}, ["expected symbol for function parameter: (.*)"] = {"changing %s to an identifier instead of a literal value"}, ["expected var (.*)"] = {"declaring %s using var instead of let/local", "introducing a new local instead of changing the value of %s"}, ["expected vararg as last parameter"] = {"moving the \"...\" to the end of the parameter list"}, ["expected whitespace before opening delimiter"] = {"adding whitespace"}, ["global (.*) conflicts with local"] = {"renaming local %s"}, ["illegal character: (.)"] = {"deleting or replacing %s", "avoiding reserved characters like \", \\, ', ~, ;, @, `, and comma"}, ["local (.*) was overshadowed by a special form or macro"] = {"renaming local %s"}, ["macro not found in macro module"] = {"checking the keys of the imported macro module's returned table"}, ["macro tried to bind (.*) without gensym"] = {"changing to %s# when introducing identifiers inside macros"}, ["malformed multisym"] = {"ensuring each period or colon is not followed by another period or colon"}, ["may only be used at compile time"] = {"moving this to inside a macro if you need to manipulate symbols/lists", "using square brackets instead of parens to construct a table"}, ["method must be last component"] = {"using a period instead of a colon for field access", "removing segments after the colon", "making the method call, then looking up the field on the result"}, ["mismatched closing delimiter (.), expected (.)"] = {"replacing %s with %s", "deleting %s", "adding matching opening delimiter earlier"}, ["multisym method calls may only be in call position"] = {"using a period instead of a colon to reference a table's fields", "putting parens around this"}, ["unable to bind (.*)"] = {"replacing the %s with an identifier"}, ["unexpected closing delimiter (.)"] = {"deleting %s", "adding matching opening delimiter earlier"}, ["unexpected multi symbol (.*)"] = {"removing periods or colons from %s"}, ["unexpected vararg"] = {"putting \"...\" at the end of the fn parameters if the vararg was intended"}, ["unknown global in strict mode: (.*)"] = {"looking to see if there's a typo", "using the _G table instead, eg. _G.%s if you really want a global", "moving this code to somewhere that %s is in scope", "binding %s as a local in the scope of this code"}, ["unused local (.*)"] = {"fixing a typo so %s is used", "renaming the local to _%s"}, ["use of global (.*) is aliased by a local"] = {"renaming local %s", "refer to the global using _G.%s instead of directly"}} local unpack = (table.unpack or _G.unpack) local function suggest(msg) local suggestion = nil for pat, sug in pairs(suggestions) do local matches = {msg:match(pat)} if (0 < #matches) then if ("table" == type(sug)) then local out = {} for _, s in ipairs(sug) do table.insert(out, s:format(unpack(matches))) end suggestion = out else suggestion = sug(matches) end end end return suggestion end local function read_line_from_file(filename, line) local bytes = 0 local f = assert(io.open(filename)) local _ = nil for _0 = 1, (line - 1) do bytes = (bytes + 1 + #f:read()) end _ = nil local codeline = f:read() f:close() return codeline, bytes end local function read_line_from_string(matcher, target_line, _3fcurrent_line, _3fbytes) local this_line, newline = matcher() local current_line = (_3fcurrent_line or 1) local bytes = ((_3fbytes or 0) + #this_line + #newline) if (target_line == current_line) then return this_line, bytes elseif this_line then return read_line_from_string(matcher, target_line, (current_line + 1), bytes) end end local function read_line(filename, line, source) if source then return read_line_from_string(string.gmatch((source .. "\n"), "(.-)(\13?\n)"), line) else return read_line_from_file(filename, line) end end local function friendly_msg(msg, _0_0, source) local _1_ = _0_0 local byteend = _1_["byteend"] local bytestart = _1_["bytestart"] local filename = _1_["filename"] local line = _1_["line"] local ok, codeline, bol = pcall(read_line, filename, line, source) local suggestions0 = suggest(msg) local out = {msg, ""} if (ok and codeline) then table.insert(out, codeline) end if (ok and codeline and bytestart and byteend) then table.insert(out, (string.rep(" ", (bytestart - bol - 1)) .. "^" .. string.rep("^", math.min((byteend - bytestart), ((bol + #codeline) - bytestart))))) end if (ok and codeline and bytestart and not byteend) then table.insert(out, (string.rep("-", (bytestart - bol - 1)) .. "^")) table.insert(out, "") end if suggestions0 then for _, suggestion in ipairs(suggestions0) do table.insert(out, ("* Try %s."):format(suggestion)) end end return table.concat(out, "\n") end local function assert_compile(condition, msg, ast, source) if not condition then local _1_ = ast_source(ast) local filename = _1_["filename"] local line = _1_["line"] error(friendly_msg(("Compile error in %s:%s\n %s"):format((filename or "unknown"), (line or "?"), msg), ast_source(ast), source), 0) end return condition end local function parse_error(msg, filename, line, bytestart, source) return error(friendly_msg(("Parse error in %s:%s\n %s"):format(filename, line, msg), {bytestart = bytestart, filename = filename, line = line}, source), 0) end return {["assert-compile"] = assert_compile, ["parse-error"] = parse_error} end package.preload["fennel.parser"] = package.preload["fennel.parser"] or function(...) local utils = require("fennel.utils") local friend = require("fennel.friend") local unpack = (table.unpack or _G.unpack) local function granulate(getchunk) local c, index, done_3f = "", 1, false local function _0_(parser_state) if not done_3f then if (index <= #c) then local b = c:byte(index) index = (index + 1) return b else local _1_0, _2_0, _3_0 = getchunk(parser_state) local _4_ do local char = _1_0 _4_ = ((nil ~= _1_0) and (char ~= "")) end if _4_ then local char = _1_0 c = char index = 2 return c:byte() else local _ = _1_0 done_3f = true return nil end end end end local function _1_() c = "" return nil end return _0_, _1_ end local function string_stream(str) local str0 = str:gsub("^#!", ";;") local index = 1 local function _0_() local r = str0:byte(index) index = (index + 1) return r end return _0_ end local delims = {[123] = 125, [125] = true, [40] = 41, [41] = true, [91] = 93, [93] = true} local function whitespace_3f(b) return ((b == 32) or ((b >= 9) and (b <= 13))) end local function sym_char_3f(b) local b0 = nil if ("number" == type(b)) then b0 = b else b0 = string.byte(b) end return ((b0 > 32) and not delims[b0] and (b0 ~= 127) and (b0 ~= 34) and (b0 ~= 39) and (b0 ~= 126) and (b0 ~= 59) and (b0 ~= 44) and (b0 ~= 64) and (b0 ~= 96)) end local prefixes = {[35] = "hashfn", [39] = "quote", [44] = "unquote", [96] = "quote"} local function parser(getbyte, filename, options) local stack = {} local line = 1 local byteindex = 0 local lastb = nil local function ungetb(ub) if (ub == 10) then line = (line - 1) end byteindex = (byteindex - 1) lastb = ub return nil end local function getb() local r = nil if lastb then r, lastb = lastb, nil else r = getbyte({["stack-size"] = #stack}) end byteindex = (byteindex + 1) if (r == 10) then line = (line + 1) end return r end assert(((nil == filename) or ("string" == type(filename))), "expected filename as second argument to parser") local function parse_error(msg, byteindex_override) local _0_ = (options or utils.root.options or {}) local source = _0_["source"] local unfriendly = _0_["unfriendly"] utils.root.reset() if unfriendly then return error(string.format("Parse error in %s:%s: %s", (filename or "unknown"), (line or "?"), msg), 0) else return friend["parse-error"](msg, (filename or "unknown"), (line or "?"), (byteindex_override or byteindex), source) end end local function parse_stream() local whitespace_since_dispatch, done_3f, retval = true local function dispatch(v) local _0_0 = stack[#stack] if (_0_0 == nil) then retval, done_3f, whitespace_since_dispatch = v, true, false return nil elseif ((type(_0_0) == "table") and (nil ~= _0_0.prefix)) then local prefix = _0_0.prefix local source = nil do local _1_0 = table.remove(stack) _1_0["byteend"] = byteindex source = _1_0 end local list = utils.list(utils.sym(prefix, source), v) for k, v0 in pairs(source) do list[k] = v0 end return dispatch(list) elseif (nil ~= _0_0) then local top = _0_0 whitespace_since_dispatch = false return table.insert(top, v) end end local function badend() local accum = utils.map(stack, "closer") local _0_ if (#stack == 1) then _0_ = "" else _0_ = "s" end return parse_error(string.format("expected closing delimiter%s %s", _0_, string.char(unpack(accum)))) end local function skip_whitespace(b) if (b and whitespace_3f(b)) then whitespace_since_dispatch = true return skip_whitespace(getb()) elseif (not b and (#stack > 0)) then return badend() else return b end end local function parse_comment(b, contents) if (b and (10 ~= b)) then local function _1_() local _0_0 = contents table.insert(_0_0, string.char(b)) return _0_0 end return parse_comment(getb(), _1_()) elseif (options and options.comments) then return dispatch(utils.comment(table.concat(contents), {filename = filename, line = (line - 1)})) else return b end end local function open_table(b) if not whitespace_since_dispatch then parse_error(("expected whitespace before opening delimiter " .. string.char(b))) end return table.insert(stack, {bytestart = byteindex, closer = delims[b], filename = filename, line = line}) end local function close_list(list) return dispatch(setmetatable(list, getmetatable(utils.list()))) end local function close_sequence(tbl) local val = utils.sequence(unpack(tbl)) for k, v in pairs(tbl) do getmetatable(val)[k] = v end return dispatch(val) end local function add_comment_at(comments, index, node) local _0_0 = comments[index] if (nil ~= _0_0) then local existing = _0_0 return table.insert(existing, node) else local _ = _0_0 comments[index] = {node} return nil end end local function next_noncomment(tbl, i) if utils["comment?"](tbl[i]) then return next_noncomment(tbl, (i + 1)) else return tbl[i] end end local function extract_comments(tbl) local comments = {keys = {}, last = {}, values = {}} while utils["comment?"](tbl[#tbl]) do table.insert(comments.last, 1, table.remove(tbl)) end local last_key_3f = false for i, node in ipairs(tbl) do if not utils["comment?"](node) then last_key_3f = not last_key_3f elseif last_key_3f then add_comment_at(comments.values, next_noncomment(tbl, i), node) else add_comment_at(comments.keys, next_noncomment(tbl, i), node) end end for i = #tbl, 1, -1 do if utils["comment?"](tbl[i]) then table.remove(tbl, i) end end return comments end local function close_curly_table(tbl) local comments = extract_comments(tbl) local keys = {} local val = {} if ((#tbl % 2) ~= 0) then byteindex = (byteindex - 1) parse_error("expected even number of values in table literal") end setmetatable(val, tbl) for i = 1, #tbl, 2 do if ((tostring(tbl[i]) == ":") and utils["sym?"](tbl[(i + 1)]) and utils["sym?"](tbl[i])) then tbl[i] = tostring(tbl[(i + 1)]) end val[tbl[i]] = tbl[(i + 1)] table.insert(keys, tbl[i]) end tbl.comments = comments tbl.keys = keys return dispatch(val) end local function close_table(b) local top = table.remove(stack) if (top == nil) then parse_error(("unexpected closing delimiter " .. string.char(b))) end if (top.closer and (top.closer ~= b)) then parse_error(("mismatched closing delimiter " .. string.char(b) .. ", expected " .. string.char(top.closer))) end top.byteend = byteindex if (b == 41) then return close_list(top) elseif (b == 93) then return close_sequence(top) else return close_curly_table(top) end end local function parse_string_loop(chars, b, state) table.insert(chars, b) local state0 = nil do local _0_0 = {state, b} if ((type(_0_0) == "table") and (_0_0[1] == "base") and (_0_0[2] == 92)) then state0 = "backslash" elseif ((type(_0_0) == "table") and (_0_0[1] == "base") and (_0_0[2] == 34)) then state0 = "done" else local _ = _0_0 state0 = "base" end end if (b and (state0 ~= "done")) then return parse_string_loop(chars, getb(), state0) else return b end end local function escape_char(c) return ({[10] = "\\n", [11] = "\\v", [12] = "\\f", [13] = "\\r", [7] = "\\a", [8] = "\\b", [9] = "\\t"})[c:byte()] end local function parse_string() table.insert(stack, {closer = 34}) local chars = {34} if not parse_string_loop(chars, getb(), "base") then badend() end table.remove(stack) local raw = string.char(unpack(chars)) local formatted = raw:gsub("[\7-\13]", escape_char) local load_fn = (rawget(_G, "loadstring") or load)(("return " .. formatted)) return dispatch(load_fn()) end local function parse_prefix(b) table.insert(stack, {bytestart = byteindex, filename = filename, line = line, prefix = prefixes[b]}) local nextb = getb() if (whitespace_3f(nextb) or (true == delims[nextb])) then if (b ~= 35) then parse_error("invalid whitespace after quoting prefix") end table.remove(stack) dispatch(utils.sym("#")) end return ungetb(nextb) end local function parse_sym_loop(chars, b) if (b and sym_char_3f(b)) then table.insert(chars, b) return parse_sym_loop(chars, getb()) else if b then ungetb(b) end return chars end end local function parse_number(rawstr) local number_with_stripped_underscores = (not rawstr:find("^_") and rawstr:gsub("_", "")) if rawstr:match("^%d") then dispatch((tonumber(number_with_stripped_underscores) or parse_error(("could not read number \"" .. rawstr .. "\"")))) return true else local _0_0 = tonumber(number_with_stripped_underscores) if (nil ~= _0_0) then local x = _0_0 dispatch(x) return true else local _ = _0_0 return false end end end local function check_malformed_sym(rawstr) if (rawstr:match("^~") and (rawstr ~= "~=")) then return parse_error("illegal character: ~") elseif rawstr:match("%.[0-9]") then return parse_error(("can't start multisym segment with a digit: " .. rawstr), (((byteindex - #rawstr) + rawstr:find("%.[0-9]")) + 1)) elseif (rawstr:match("[%.:][%.:]") and (rawstr ~= "..") and (rawstr ~= "$...")) then return parse_error(("malformed multisym: " .. rawstr), ((byteindex - #rawstr) + 1 + rawstr:find("[%.:][%.:]"))) elseif rawstr:match(":.+[%.:]") then return parse_error(("method must be last component of multisym: " .. rawstr), ((byteindex - #rawstr) + rawstr:find(":.+[%.:]"))) else return rawstr end end local function parse_sym(b) local bytestart = byteindex local rawstr = string.char(unpack(parse_sym_loop({b}, getb()))) if (rawstr == "true") then return dispatch(true) elseif (rawstr == "false") then return dispatch(false) elseif (rawstr == "...") then return dispatch(utils.varg()) elseif rawstr:match("^:.+$") then return dispatch(rawstr:sub(2)) elseif not parse_number(rawstr) then return dispatch(utils.sym(check_malformed_sym(rawstr), {byteend = byteindex, bytestart = bytestart, filename = filename, line = line})) end end local function parse_loop(b) if not b then elseif (b == 59) then parse_comment(getb(), {";"}) elseif (type(delims[b]) == "number") then open_table(b) elseif delims[b] then close_table(b) elseif (b == 34) then parse_string(b) elseif prefixes[b] then parse_prefix(b) elseif (sym_char_3f(b) or (b == string.byte("~"))) then parse_sym(b) else parse_error(("illegal character: " .. string.char(b))) end if not b then return nil elseif done_3f then return true, retval else return parse_loop(skip_whitespace(getb())) end end return parse_loop(skip_whitespace(getb())) end local function _0_() stack = {} return nil end return parse_stream, _0_ end return {["string-stream"] = string_stream, ["sym-char?"] = sym_char_3f, granulate = granulate, parser = parser} end local utils = nil package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(...) local function stablepairs(t) local keys = {} local succ = {} for k in pairs(t) do table.insert(keys, k) end local function _0_(_241, _242) return (tostring(_241) < tostring(_242)) end table.sort(keys, _0_) for i, k in ipairs(keys) do succ[k] = keys[(i + 1)] end local function stablenext(tbl, idx) local key = nil if (idx == nil) then key = keys[1] else key = succ[idx] end local value = nil if (key == nil) then value = nil else value = tbl[key] end return key, value end return stablenext, t, nil end local function map(t, f, out) local out0 = (out or {}) local f0 = nil if (type(f) == "function") then f0 = f else local function _0_(_241) return _241[f] end f0 = _0_ end for _, x in ipairs(t) do local _1_0 = f0(x) if (nil ~= _1_0) then local v = _1_0 table.insert(out0, v) end end return out0 end local function kvmap(t, f, out) local out0 = (out or {}) local f0 = nil if (type(f) == "function") then f0 = f else local function _0_(_241) return _241[f] end f0 = _0_ end for k, x in stablepairs(t) do local _1_0, _2_0 = f0(k, x) if ((nil ~= _1_0) and (nil ~= _2_0)) then local key = _1_0 local value = _2_0 out0[key] = value elseif (nil ~= _1_0) then local value = _1_0 table.insert(out0, value) end end return out0 end local function copy(from, to) local to0 = (to or {}) for k, v in pairs((from or {})) do to0[k] = v end return to0 end local function member_3f(x, tbl, n) local _0_0 = tbl[(n or 1)] if (_0_0 == x) then return true elseif (_0_0 == nil) then return false else local _ = _0_0 return member_3f(x, tbl, ((n or 1) + 1)) end end local function allpairs(tbl) assert((type(tbl) == "table"), "allpairs expects a table") local t = tbl local seen = {} local function allpairs_next(_, state) local next_state, value = next(t, state) if seen[next_state] then return allpairs_next(nil, next_state) elseif next_state then seen[next_state] = true return next_state, value else local meta = getmetatable(t) if (meta and meta.__index) then t = meta.__index return allpairs_next(t) end end end return allpairs_next end local function deref(self) return self[1] end local nil_sym = nil local function list__3estring(self, tostring2) local safe, max = {}, 0 for k in pairs(self) do if ((type(k) == "number") and (k > max)) then max = k end end for i = 1, max do safe[i] = (((self[i] == nil) and nil_sym) or self[i]) end return ("(" .. table.concat(map(safe, (tostring2 or tostring)), " ", 1, max) .. ")") end local function comment_view(c) return c, true end local function sym_3d(a, b) return ((deref(a) == deref(b)) and (getmetatable(a) == getmetatable(b))) end local function sym_3c(a, b) return (a[1] < tostring(b)) end local symbol_mt = {"SYMBOL", __eq = sym_3d, __fennelview = deref, __lt = sym_3c, __tostring = deref} local expr_mt = {"EXPR", __tostring = deref} local list_mt = {"LIST", __fennelview = list__3estring, __tostring = list__3estring} local comment_mt = {"COMMENT", __eq = sym_3d, __fennelview = comment_view, __lt = sym_3c, __tostring = deref} local sequence_marker = {"SEQUENCE"} local vararg = setmetatable({"..."}, {"VARARG", __fennelview = deref, __tostring = deref}) local getenv = nil local function _0_() return nil end getenv = ((os and os.getenv) or _0_) local function debug_on_3f(flag) local level = (getenv("FENNEL_DEBUG") or "") return ((level == "all") or level:find(flag)) end local function list(...) return setmetatable({...}, list_mt) end local function sym(str, _3fsource, _3fscope) local s = {str, ["?scope"] = _3fscope} for k, v in pairs((_3fsource or {})) do if (type(k) == "string") then s[k] = v end end return setmetatable(s, symbol_mt) end nil_sym = sym("nil") local function sequence(...) return setmetatable({...}, {sequence = sequence_marker}) end local function expr(strcode, etype) return setmetatable({strcode, type = etype}, expr_mt) end local function comment_2a(contents, _3fsource) local _1_ = (_3fsource or {}) local filename = _1_["filename"] local line = _1_["line"] return setmetatable({contents, filename = filename, line = line}, comment_mt) end local function varg() return vararg end local function expr_3f(x) return ((type(x) == "table") and (getmetatable(x) == expr_mt) and x) end local function varg_3f(x) return ((x == vararg) and x) end local function list_3f(x) return ((type(x) == "table") and (getmetatable(x) == list_mt) and x) end local function sym_3f(x) return ((type(x) == "table") and (getmetatable(x) == symbol_mt) and x) end local function sequence_3f(x) local mt = ((type(x) == "table") and getmetatable(x)) return (mt and (mt.sequence == sequence_marker) and x) end local function comment_3f(x) return ((type(x) == "table") and (getmetatable(x) == comment_mt) and x) end local function table_3f(x) return ((type(x) == "table") and (x ~= vararg) and (getmetatable(x) ~= list_mt) and (getmetatable(x) ~= symbol_mt) and not comment_3f(x) and x) end local function multi_sym_3f(str) if sym_3f(str) then return multi_sym_3f(tostring(str)) elseif (type(str) ~= "string") then return false else local parts = {} for part in str:gmatch("[^%.%:]+[%.%:]?") do local last_char = part:sub(( - 1)) if (last_char == ":") then parts["multi-sym-method-call"] = true end if ((last_char == ":") or (last_char == ".")) then parts[(#parts + 1)] = part:sub(1, ( - 2)) else parts[(#parts + 1)] = part end end return ((#parts > 0) and (str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and parts) end end local function quoted_3f(symbol) return symbol.quoted end local function walk_tree(root, f, custom_iterator) local function walk(iterfn, parent, idx, node) if f(idx, node, parent) then for k, v in iterfn(node) do walk(iterfn, node, k, v) end return nil end end walk((custom_iterator or pairs), nil, nil, root) return root end local lua_keywords = {"and", "break", "do", "else", "elseif", "end", "false", "for", "function", "if", "in", "local", "nil", "not", "or", "repeat", "return", "then", "true", "until", "while", "goto"} for i, v in ipairs(lua_keywords) do lua_keywords[v] = i end local function valid_lua_identifier_3f(str) return (str:match("^[%a_][%w_]*$") and not lua_keywords[str]) end local propagated_options = {"allowedGlobals", "indent", "correlate", "useMetadata", "env", "compiler-env", "compilerEnv"} local function propagate_options(options, subopts) for _, name in ipairs(propagated_options) do subopts[name] = options[name] end return subopts end local root = nil local function _1_() end root = {chunk = nil, options = nil, reset = _1_, scope = nil} root["set-reset"] = function(_2_0) local _3_ = _2_0 local chunk = _3_["chunk"] local options = _3_["options"] local reset = _3_["reset"] local scope = _3_["scope"] root.reset = function() root.chunk, root.scope, root.options, root.reset = chunk, scope, options, reset return nil end return root.reset end local function hook(event, ...) if (root.options and root.options.plugins) then for _, plugin in ipairs(root.options.plugins) do local _3_0 = plugin[event] if (nil ~= _3_0) then local f = _3_0 f(...) end end return nil end end return {["comment?"] = comment_3f, ["debug-on?"] = debug_on_3f, ["expr?"] = expr_3f, ["list?"] = list_3f, ["lua-keywords"] = lua_keywords, ["member?"] = member_3f, ["multi-sym?"] = multi_sym_3f, ["propagate-options"] = propagate_options, ["quoted?"] = quoted_3f, ["sequence?"] = sequence_3f, ["sym?"] = sym_3f, ["table?"] = table_3f, ["valid-lua-identifier?"] = valid_lua_identifier_3f, ["varg?"] = varg_3f, ["walk-tree"] = walk_tree, allpairs = allpairs, comment = comment_2a, copy = copy, deref = deref, expr = expr, hook = hook, kvmap = kvmap, list = list, map = map, path = table.concat({"./?.fnl", "./?/init.fnl", getenv("FENNEL_PATH")}, ";"), root = root, sequence = sequence, stablepairs = stablepairs, sym = sym, varg = varg} end utils = require("fennel.utils") local parser = require("fennel.parser") local compiler = require("fennel.compiler") local specials = require("fennel.specials") local repl = require("fennel.repl") local view = require("fennel.view") local function eval_env(env) if (env == "_COMPILER") then local env0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {}) local mt = getmetatable(env0) mt.__index = _G return specials["wrap-env"](env0) else return (env and specials["wrap-env"](env)) end end local function eval_opts(options, str) local opts = utils.copy(options) if ((opts.allowedGlobals == nil) and not getmetatable(opts.env)) then opts.allowedGlobals = specials["current-global-names"](opts.env) end if (not opts.filename and not opts.source) then opts.source = str end if (opts.env == "_COMPILER") then opts.scope = compiler["make-scope"](compiler.scopes.compiler) end return opts end local function eval(str, options, ...) local opts = eval_opts(options, str) local env = eval_env(opts.env) local lua_source = compiler["compile-string"](str, opts) local loader = nil local function _0_(...) if opts.filename then return ("@" .. opts.filename) else return str end end loader = specials["load-code"](lua_source, env, _0_(...)) opts.filename = nil return loader(...) end local function dofile_2a(filename, options, ...) local opts = utils.copy(options) local f = assert(io.open(filename, "rb")) local source = assert(f:read("*all"), ("Could not read " .. filename)) f:close() opts.filename = filename return eval(source, opts, ...) end local mod = {["comment?"] = utils["comment?"], ["compile-stream"] = compiler["compile-stream"], ["compile-string"] = compiler["compile-string"], ["list?"] = utils["list?"], ["load-code"] = specials["load-code"], ["macro-loaded"] = specials["macro-loaded"], ["macro-searchers"] = specials["macro-searchers"], ["make-searcher"] = specials["make-searcher"], ["search-module"] = specials["search-module"], ["sequence?"] = utils["sequence?"], ["string-stream"] = parser["string-stream"], ["sym-char?"] = parser["sym-char?"], ["sym?"] = utils["sym?"], comment = utils.comment, compile = compiler.compile, compile1 = compiler.compile1, compileStream = compiler["compile-stream"], compileString = compiler["compile-string"], doc = specials.doc, dofile = dofile_2a, eval = eval, gensym = compiler.gensym, granulate = parser.granulate, list = utils.list, loadCode = specials["load-code"], macroLoaded = specials["macro-loaded"], makeSearcher = specials["make-searcher"], make_searcher = specials["make-searcher"], mangle = compiler["global-mangling"], metadata = compiler.metadata, parser = parser.parser, path = utils.path, repl = repl, scope = compiler["make-scope"], searchModule = specials["search-module"], searcher = specials["make-searcher"](), sequence = utils.sequence, stringStream = parser["string-stream"], sym = utils.sym, traceback = compiler.traceback, unmangle = compiler["global-unmangling"], varg = utils.varg, version = "0.9.0", view = view} utils["fennel-module"] = mod do local builtin_macros = [===[;; This module contains all the built-in Fennel macros. Unlike all the other ;; modules that are loaded by the old bootstrap compiler, this runs in the ;; compiler scope of the version of the compiler being defined. ;; The code for these macros is somewhat idiosyncratic because it cannot use any ;; macros which have not yet been defined. ;; TODO: some of these macros modify their arguments; we should stop doing that, ;; but in a way that preserves file/line metadata. (fn ->* [val ...] "Thread-first macro. Take the first value and splice it into the second form as its first argument. The value of the second form is spliced into the first arg of the third, etc." (var x val) (each [_ e (ipairs [...])] (let [elt (if (list? e) e (list e))] (table.insert elt 2 x) (set x elt))) x) (fn ->>* [val ...] "Thread-last macro. Same as ->, except splices the value into the last position of each form rather than the first." (var x val) (each [_ e (pairs [...])] (let [elt (if (list? e) e (list e))] (table.insert elt x) (set x elt))) x) (fn -?>* [val ...] "Nil-safe thread-first macro. Same as -> except will short-circuit with nil when it encounters a nil value." (if (= 0 (select "#" ...)) val (let [els [...] e (table.remove els 1) el (if (list? e) e (list e)) tmp (gensym)] (table.insert el 2 tmp) `(let [,tmp ,val] (if ,tmp (-?> ,el ,(unpack els)) ,tmp))))) (fn -?>>* [val ...] "Nil-safe thread-last macro. Same as ->> except will short-circuit with nil when it encounters a nil value." (if (= 0 (select "#" ...)) val (let [els [...] e (table.remove els 1) el (if (list? e) e (list e)) tmp (gensym)] (table.insert el tmp) `(let [,tmp ,val] (if ,tmp (-?>> ,el ,(unpack els)) ,tmp))))) (fn ?dot [tbl k ...] "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." (if (= nil k) tbl `(let [res# (. ,tbl ,k)] (and res# (?. res# ,...))))) (fn doto* [val ...] "Evaluates val and splices it into the first argument of subsequent forms." (let [name (gensym) form `(let [,name ,val])] (each [_ elt (pairs [...])] (table.insert elt 2 name) (table.insert form elt)) (table.insert form name) form)) (fn when* [condition body1 ...] "Evaluate body for side-effects only when condition is truthy." (assert body1 "expected body") `(if ,condition (do ,body1 ,...))) (fn with-open* [closable-bindings ...] "Like `let`, but invokes (v:close) on each binding after evaluating the body. The body is evaluated inside `xpcall` so that bound values will be closed upon encountering an error before propagating it." (let [bodyfn `(fn [] ,...) closer `(fn close-handlers# [ok# ...] (if ok# ... (error ... 0))) traceback `(. (or package.loaded.fennel debug) :traceback)] (for [i 1 (length closable-bindings) 2] (assert (sym? (. closable-bindings i)) "with-open only allows symbols in bindings") (table.insert closer 4 `(: ,(. closable-bindings i) :close))) `(let ,closable-bindings ,closer (close-handlers# (xpcall ,bodyfn ,traceback))))) (fn collect* [iter-tbl key-value-expr ...] "Returns a table made by running an iterator and evaluating an expression that returns key-value pairs to be inserted sequentially into the table. This can be thought of as a \"table comprehension\". The provided key-value expression must return either 2 values, or nil. For example, (collect [k v (pairs {:apple \"red\" :orange \"orange\"})] (values v k)) returns {:red \"apple\" :orange \"orange\"}" (assert (and (sequence? iter-tbl) (>= (length iter-tbl) 2)) "expected iterator binding table") (assert (not= nil key-value-expr) "expected key-value expression") (assert (= nil ...) "expected exactly one body expression. Wrap multiple expressions with do") `(let [tbl# {}] (each ,iter-tbl (match ,key-value-expr (k# v#) (tset tbl# k# v#))) tbl#)) (fn icollect* [iter-tbl value-expr ...] "Returns a sequential table made by running an iterator and evaluating an expression that returns values to be inserted sequentially into the table. This can be thought of as a \"list comprehension\". For example, (icollect [_ v (ipairs [1 2 3 4 5])] (when (> v 2) (* v v))) returns [9 16 25]" (assert (and (sequence? iter-tbl) (>= (length iter-tbl) 2)) "expected iterator binding table") (assert (not= nil value-expr) "expected table value expression") (assert (= nil ...) "expected exactly one body expression. Wrap multiple expressions with do") `(let [tbl# []] (each ,iter-tbl (tset tbl# (+ (length tbl#) 1) ,value-expr)) tbl#)) (fn partial* [f ...] "Returns a function with all arguments partially applied to f." (assert f "expected a function to partially apply") (let [body (list f ...)] (table.insert body _VARARG) `(fn [,_VARARG] ,body))) (fn pick-args* [n f] "Creates a function of arity n that applies its arguments to f. For example, (pick-args 2 func) expands to (fn [_0_ _1_] (func _0_ _1_))" (assert (and (= (type n) :number) (= n (math.floor n)) (>= n 0)) (.. "Expected n to be an integer literal >= 0, got " (tostring n))) (let [bindings []] (for [i 1 n] (tset bindings i (gensym))) `(fn ,bindings (,f ,(unpack bindings))))) (fn pick-values* [n ...] "Like the `values` special, but emits exactly n values. For example, (pick-values 2 ...) expands to (let [(_0_ _1_) ...] (values _0_ _1_))" (assert (and (= :number (type n)) (>= n 0) (= n (math.floor n))) (.. "Expected n to be an integer >= 0, got " (tostring n))) (let [let-syms (list) let-values (if (= 1 (select "#" ...)) ... `(values ,...))] (for [i 1 n] (table.insert let-syms (gensym))) (if (= n 0) `(values) `(let [,let-syms ,let-values] (values ,(unpack let-syms)))))) (fn lambda* [...] "Function literal with arity checking. Will throw an exception if a declared argument is passed in as nil, unless that argument name begins with ?." (let [args [...] has-internal-name? (sym? (. args 1)) arglist (if has-internal-name? (. args 2) (. args 1)) docstring-position (if has-internal-name? 3 2) has-docstring? (and (> (length args) docstring-position) (= :string (type (. args docstring-position)))) arity-check-position (- 4 (if has-internal-name? 0 1) (if has-docstring? 0 1)) empty-body? (< (length args) arity-check-position)] (fn check! [a] (if (table? a) (each [_ a (pairs a)] (check! a)) (let [as (tostring a)] (and (not (as:match "^?")) (not= as "&") (not= as "_") (not= as "..."))) (table.insert args arity-check-position `(assert (not= nil ,a) (string.format "Missing argument %s on %s:%s" ,(tostring a) ,(or a.filename :unknown) ,(or a.line "?")))))) (assert (= :table (type arglist)) "expected arg list") (each [_ a (ipairs arglist)] (check! a)) (if empty-body? (table.insert args (sym :nil))) `(fn ,(unpack args)))) (fn macro* [name ...] "Define a single macro." (assert (sym? name) "expected symbol for macro name") (local args [...]) `(macros {,(tostring name) (fn ,(unpack args))})) (fn macrodebug* [form return?] "Print the resulting form after performing macroexpansion. With a second argument, returns expanded form as a string instead of printing." (let [handle (if return? `do `print)] `(,handle ,(view (macroexpand form _SCOPE))))) (fn import-macros* [binding1 module-name1 ...] "Binds a table of macros from each macro module according to a binding form. Each binding form can be either a symbol or a k/v destructuring table. Example: (import-macros mymacros :my-macros ; bind to symbol {:macro1 alias : macro2} :proj.macros) ; import by name" (assert (and binding1 module-name1 (= 0 (% (select "#" ...) 2))) "expected even number of binding/modulename pairs") (for [i 1 (select "#" binding1 module-name1 ...) 2] (let [(binding modname) (select i binding1 module-name1 ...) ;; generate a subscope of current scope, use require-macros ;; to bring in macro module. after that, we just copy the ;; macros from subscope to scope. scope (get-scope) subscope (fennel.scope scope)] (_SPECIALS.require-macros `(require-macros ,modname) subscope {} ast) (if (sym? binding) ;; bind whole table of macros to table bound to symbol (do (tset scope.macros (. binding 1) {}) (each [k v (pairs subscope.macros)] (tset (. scope.macros (. binding 1)) k v))) ;; 1-level table destructuring for importing individual macros (table? binding) (each [macro-name [import-key] (pairs binding)] (assert (= :function (type (. subscope.macros macro-name))) (.. "macro " macro-name " not found in module " (tostring modname))) (tset scope.macros import-key (. subscope.macros macro-name)))))) nil) ;;; Pattern matching (fn match-values [vals pattern unifications match-pattern] (let [condition `(and) bindings []] (each [i pat (ipairs pattern)] (let [(subcondition subbindings) (match-pattern [(. vals i)] pat unifications)] (table.insert condition subcondition) (each [_ b (ipairs subbindings)] (table.insert bindings b)))) (values condition bindings))) (fn match-table [val pattern unifications match-pattern] (let [condition `(and (= (type ,val) :table)) bindings []] (each [k pat (pairs pattern)] (if (= pat `&) (do (assert (= nil (. pattern (+ k 2))) "expected & rest argument before last parameter") (table.insert bindings (. pattern (+ k 1))) (table.insert bindings [`(select ,k ((or table.unpack _G.unpack) ,val))])) (= k `&as) (do (table.insert bindings pat) (table.insert bindings val)) (and (= :number (type k)) (= `&as pat)) (do (assert (= nil (. pattern (+ k 2))) "expected &as argument before last parameter") (table.insert bindings (. pattern (+ k 1))) (table.insert bindings val)) ;; don't process the pattern right after &/&as; already got it (or (not= :number (type k)) (and (not= `&as (. pattern (- k 1))) (not= `& (. pattern (- k 1))))) (let [subval `(. ,val ,k) (subcondition subbindings) (match-pattern [subval] pat unifications)] (table.insert condition subcondition) (each [_ b (ipairs subbindings)] (table.insert bindings b))))) (values condition bindings))) (fn match-pattern [vals pattern unifications] "Takes the AST of values and a single pattern and returns a condition to determine if it matches as well as a list of bindings to introduce for the duration of the body if it does match." ;; we have to assume we're matching against multiple values here until we ;; know we're either in a multi-valued clause (in which case we know the # ;; of vals) or we're not, in which case we only care about the first one. (let [[val] vals] (if (or (and (sym? pattern) ; unification with outer locals (or nil) (not= "_" (tostring pattern)) ; never unify _ (or (in-scope? pattern) (= :nil (tostring pattern)))) (and (multi-sym? pattern) (in-scope? (. (multi-sym? pattern) 1)))) (values `(= ,val ,pattern) []) ;; unify a local we've seen already (and (sym? pattern) (. unifications (tostring pattern))) (values `(= ,(. unifications (tostring pattern)) ,val) []) ;; bind a fresh local (sym? pattern) (let [wildcard? (: (tostring pattern) :find "^_")] (if (not wildcard?) (tset unifications (tostring pattern) val)) (values (if (or wildcard? (string.find (tostring pattern) "^?")) true `(not= ,(sym :nil) ,val)) [pattern val])) ;; guard clause (and (list? pattern) (= (. pattern 2) `?)) (let [(pcondition bindings) (match-pattern vals (. pattern 1) unifications) condition `(and ,pcondition)] (for [i 3 (length pattern)] ; splice in guard clauses (table.insert condition (. pattern i))) (values `(let ,bindings ,condition) bindings)) ;; multi-valued patterns (represented as lists) (list? pattern) (match-values vals pattern unifications match-pattern) ;; table patterns (= (type pattern) :table) (match-table val pattern unifications match-pattern) ;; literal value (values `(= ,val ,pattern) [])))) (fn match-condition [vals clauses] "Construct the actual `if` AST for the given match values and clauses." (if (not= 0 (% (length clauses) 2)) ; treat odd final clause as default (table.insert clauses (length clauses) (sym "_"))) (let [out `(if)] (for [i 1 (length clauses) 2] (let [pattern (. clauses i) body (. clauses (+ i 1)) (condition bindings) (match-pattern vals pattern {})] (table.insert out condition) (table.insert out `(let ,bindings ,body)))) out)) (fn match-val-syms [clauses] "How many multi-valued clauses are there? return a list of that many gensyms." (let [syms (list (gensym))] (for [i 1 (length clauses) 2] (if (list? (. clauses i)) (each [valnum (ipairs (. clauses i))] (if (not (. syms valnum)) (tset syms valnum (gensym)))))) syms)) (fn match* [val ...] ;; Old implementation of match macro, which doesn't directly support ;; `where' and `or'. New syntax is implemented in `match-where', ;; which simply generates old syntax and feeds it to `match*'. (let [clauses [...] vals (match-val-syms clauses)] ;; protect against multiple evaluation of the value, bind against as ;; many values as we ever match against in the clauses. (list `let [vals val] (match-condition vals clauses)))) ;; Construction of old match syntax from new syntax (fn partition-2 [seq] ;; Partition `seq` by 2. ;; If `seq` has odd amount of elements, the last one is dropped. ;; ;; Input: [1 2 3 4 5] ;; Output: [[1 2] [3 4]] (let [firsts [] seconds [] res []] (for [i 1 (length seq) 2] (let [first (. seq i) second (. seq (+ i 1))] (table.insert firsts (if (not= nil first) first `nil)) (table.insert seconds (if (not= nil second) second `nil)))) (each [i v1 (ipairs firsts)] (let [v2 (. seconds i)] (if (not= nil v2) (table.insert res [v1 v2])))) res)) (fn transform-or [[_ & pats] guards] ;; Transforms `(or pat pats*)` lists into match `guard` patterns. ;; ;; (or pat1 pat2), guard => [(pat1 ? guard) (pat2 ? guard)] (let [res []] (each [_ pat (ipairs pats)] (table.insert res (list pat `? (unpack guards)))) res)) (fn transform-cond [cond] ;; Transforms `where` cond into sequence of `match` guards. ;; ;; pat => [pat] ;; (where pat guard) => [(pat ? guard)] ;; (where (or pat1 pat2) guard) => [(pat1 ? guard) (pat2 ? guard)] (if (and (list? cond) (= (. cond 1) `where)) (let [second (. cond 2)] (if (and (list? second) (= (. second 1) `or)) (transform-or second [(unpack cond 3)]) :else [(list second `? (unpack cond 3))])) :else [cond])) (fn match-where [val ...] "Perform pattern matching on val. See reference for details. Syntax: (match data-expression pattern body (where pattern guard guards*) body (where (or pattern patterns*) guard guards*) body)" (let [conds-bodies (partition-2 [...]) else-branch (if (not= 0 (% (select "#" ...) 2)) (select (select "#" ...) ...)) match-body []] (each [_ [cond body] (ipairs conds-bodies)] (each [_ cond (ipairs (transform-cond cond))] (table.insert match-body cond) (table.insert match-body body))) (if else-branch (table.insert match-body else-branch)) (match* val (unpack match-body)))) {:-> ->* :->> ->>* :-?> -?>* :-?>> -?>>* :?. ?dot :doto doto* :when when* :with-open with-open* :collect collect* :icollect icollect* :partial partial* :lambda lambda* :pick-args pick-args* :pick-values pick-values* :macro macro* :macrodebug macrodebug* :import-macros import-macros* :match match-where} ]===] local module_name = "fennel.macros" local _ = nil local function _0_() return mod end package.preload[module_name] = _0_ _ = nil local env = nil do local _1_0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {}) _1_0["utils"] = utils _1_0["fennel"] = mod env = _1_0 end local built_ins = eval(builtin_macros, {allowedGlobals = false, env = env, filename = "src/fennel/macros.fnl", moduleName = module_name, scope = compiler.scopes.compiler, useMetadata = true}) for k, v in pairs(built_ins) do compiler.scopes.global.macros[k] = v end compiler.scopes.global.macros["\206\187"] = compiler.scopes.global.macros.lambda package.preload[module_name] = nil end return mod