@@ 1,192 1,3616 @@
#!/usr/bin/env lua
-
-local fennel_dir = arg[0]:match("(.-)[^\\/]+$")
-package.path = fennel_dir .. "?.lua;" .. package.path
-local fennel = require('fennel')
-local unpack = unpack or table.unpack
-
-local help = [[
-Usage: fennel [FLAG] [FILE]
-
-Run fennel, a lisp programming language for the Lua runtime.
-
- --repl : Launch an interactive repl session
- --compile FILES : Compile files and write their Lua to stdout
-
- --no-searcher : Skip installing package.searchers entry
- --indent VAL : Indent compiler output with VAL
- --add-package-path PATH : Add PATH to package.path for finding Lua modules
- --add-fennel-path PATH : Add PATH to fennel.path for finding Fennel modules
- --globals G1[,G2...] : Allow these globals in addition to standard ones
- --globals-only G1[,G2] : Same as above, but exclude standard ones
- --require-as-include : Inline required modules in the output
- --metadata : Enable function metadata, even in compiled output
- --no-metadata : Disable function metadata, even in REPL
- --correlate : Make Lua output line numbers match Fennel input
-
- --eval SOURCE (-e) : Evaluate source code and print the result
-
- --help (-h) : Display this text
- --version (-v) : Show version
-
- Metadata is typically considered a development feature and is not recommended
- for production. It is used for docstrings and enabled by default in the REPL.
-
- When not given a flag, runs the file given as the first argument.
- When given neither flag nor file, launches a repl.
-
- If ~/.fennelrc exists, loads it before launching a repl.]]
-
+package.preload["fennel.binary"] = package.preload["fennel.binary"] or function(...)
+ local fennel = require("fennel")
+ local function shellout(command)
+ local f = io.popen(command)
+ local stdout = f:read("*all")
+ return (f:close() and stdout)
+ end
+ local function execute(cmd)
+ local _0_0 = os.execute(cmd)
+ if (_0_0 == 0) then
+ return true
+ elseif (_0_0 == true) then
+ return true
+ end
+ end
+ local function string__3ec_hex_literal(characters)
+ local hex = {}
+ for character in characters:gmatch(".") do
+ table.insert(hex, ("0x%02x"):format(string.byte(character)))
+ end
+ return table.concat(hex, ", ")
+ end
+ local c_shim = "#ifdef __cplusplus\nextern \"C\" {\n#endif\n#include <lauxlib.h>\n#include <lua.h>\n#include <lualib.h>\n#ifdef __cplusplus\n}\n#endif\n#include <signal.h>\n#include <stdio.h>\n#include <stdlib.h>\n#include <string.h>\n\n#if LUA_VERSION_NUM == 501\n #define LUA_OK 0\n#endif\n\n/* Copied from lua.c */\n\nstatic lua_State *globalL = NULL;\n\nstatic void lstop (lua_State *L, lua_Debug *ar) {\n (void)ar; /* unused arg. */\n lua_sethook(L, NULL, 0, 0); /* reset hook */\n luaL_error(L, \"interrupted!\");\n}\n\nstatic void laction (int i) {\n signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */\n lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);\n}\n\nstatic void createargtable (lua_State *L, char **argv, int argc, int script) {\n int i, narg;\n if (script == argc) script = 0; /* no script name? */\n narg = argc - (script + 1); /* number of positive indices */\n lua_createtable(L, narg, script + 1);\n for (i = 0; i < argc; i++) {\n lua_pushstring(L, argv[i]);\n lua_rawseti(L, -2, i - script);\n }\n lua_setglobal(L, \"arg\");\n}\n\nstatic int msghandler (lua_State *L) {\n const char *msg = lua_tostring(L, 1);\n if (msg == NULL) { /* is error object not a string? */\n if (luaL_callmeta(L, 1, \"__tostring\") && /* does it have a metamethod */\n lua_type(L, -1) == LUA_TSTRING) /* that produces a string? */\n return 1; /* that is the message */\n else\n msg = lua_pushfstring(L, \"(error object is a %%s value)\",\n luaL_typename(L, 1));\n }\n /* Call debug.traceback() instead of luaL_traceback() for Lua 5.1 compat. */\n lua_getglobal(L, \"debug\");\n lua_getfield(L, -1, \"traceback\");\n /* debug */\n lua_remove(L, -2);\n lua_pushstring(L, msg);\n /* original msg */\n lua_remove(L, -3);\n lua_pushinteger(L, 2); /* skip this function and traceback */\n lua_call(L, 2, 1); /* call debug.traceback */\n return 1; /* return the traceback */\n}\n\nstatic int docall (lua_State *L, int narg, int nres) {\n int status;\n int base = lua_gettop(L) - narg; /* function index */\n lua_pushcfunction(L, msghandler); /* push message handler */\n lua_insert(L, base); /* put it under function and args */\n globalL = L; /* to be available to 'laction' */\n signal(SIGINT, laction); /* set C-signal handler */\n status = lua_pcall(L, narg, nres, base);\n signal(SIGINT, SIG_DFL); /* reset C-signal handler */\n lua_remove(L, base); /* remove message handler from the stack */\n return status;\n}\n\nint main(int argc, char *argv[]) {\n lua_State *L = luaL_newstate();\n luaL_openlibs(L);\n createargtable(L, argv, argc, 0);\n\n static const unsigned char lua_loader_program[] = {\n%s\n};\n if(luaL_loadbuffer(L, (const char*)lua_loader_program,\n sizeof(lua_loader_program), \"%s\") != LUA_OK) {\n fprintf(stderr, \"luaL_loadbuffer: %%s\\n\", lua_tostring(L, -1));\n lua_close(L);\n return 1;\n }\n\n /* lua_bundle */\n lua_newtable(L);\n static const unsigned char lua_require_1[] = {\n %s\n };\n lua_pushlstring(L, (const char*)lua_require_1, sizeof(lua_require_1));\n lua_setfield(L, -2, \"%s\");\n\n%s\n\n if (docall(L, 1, LUA_MULTRET)) {\n const char *errmsg = lua_tostring(L, 1);\n if (errmsg) {\n fprintf(stderr, \"%%s\\n\", errmsg);\n }\n lua_close(L);\n return 1;\n }\n lua_close(L);\n return 0;\n}"
+ local function compile_fennel(filename, options)
+ local f = nil
+ if (filename == "-") then
+ f = io.stdin
+ else
+ f = assert(io.open(filename, "rb"))
+ end
+ local lua_code = fennel["compile-string"](f:read("*a"), options)
+ f:close()
+ return lua_code
+ end
+ local function native_loader(native)
+ local nm = (os.getenv("NM") or "nm")
+ local out = {" /* native libraries */"}
+ for _, path in ipairs(native) do
+ for open in shellout((nm .. " " .. path)):gmatch("[^dDt] _?luaopen_([%a%p%d]+)") do
+ table.insert(out, (" int luaopen_%s(lua_State *L);"):format(open))
+ table.insert(out, (" lua_pushcfunction(L, luaopen_%s);"):format(open))
+ table.insert(out, (" lua_setfield(L, -2, \"%s\");\n"):format((open:sub(1, 1) .. open:sub(2):gsub("_", "."))))
+ end
+ end
+ return table.concat(out, "\n")
+ end
+ local function fennel__3ec(filename, native, options)
+ local basename = filename:gsub("(.*[\\/])(.*)", "%2")
+ local basename_noextension = (basename:match("(.+)%.") or basename)
+ local dotpath = filename:gsub("^%.%/", ""):gsub("[\\/]", ".")
+ local dotpath_noextension = (dotpath:match("(.+)%.") or dotpath)
+ local fennel_loader = nil
+ local _0_
+ do
+ _0_ = "(do (local bundle_0_ ...) (fn loader_0_ [name_0_] (match (or (. bundle_0_ name_0_) (. bundle_0_ (.. name_0_ \".init\"))) (mod_0_ ? (= \"function\" (type mod_0_))) mod_0_ (mod_0_ ? (= \"string\" (type mod_0_))) (assert (if (= _VERSION \"Lua 5.1\") (loadstring mod_0_ name_0_) (load mod_0_ name_0_))) nil (values nil (: \"\\n\\tmodule '%%s' not found in fennel bundle\" \"format\" name_0_)))) (table.insert (or package.loaders package.searchers) 2 loader_0_) ((assert (loader_0_ \"%s\")) ((or unpack table.unpack) arg)))"
+ end
+ fennel_loader = _0_:format(dotpath_noextension)
+ local lua_loader = fennel["compile-string"](fennel_loader)
+ return c_shim:format(string__3ec_hex_literal(lua_loader), basename_noextension, string__3ec_hex_literal(compile_fennel(filename, options)), dotpath_noextension, native_loader(native))
+ end
+ local function write_c(filename, native, options)
+ local out_filename = (filename .. "_binary.c")
+ local f = assert(io.open(out_filename, "w+"))
+ f:write(fennel__3ec(filename, native, options))
+ f:close()
+ return out_filename
+ end
+ local function compile_binary(lua_c_path, executable_name, static_lua, lua_include_dir, native)
+ local cc = (os.getenv("CC") or "cc")
+ local rdynamic, bin_extension, ldl_3f = nil, nil, nil
+ if shellout((cc .. " -dumpmachine")):match("mingw") then
+ rdynamic, bin_extension, ldl_3f = "", ".exe", false
+ else
+ rdynamic, bin_extension, ldl_3f = "-rdynamic", "", true
+ end
+ local compile_command = nil
+ local _1_
+ if ldl_3f then
+ _1_ = "-ldl"
+ else
+ _1_ = ""
+ end
+ compile_command = {cc, "-Os", lua_c_path, table.concat(native, " "), static_lua, rdynamic, "-lm", _1_, "-o", (executable_name .. bin_extension), "-I", lua_include_dir, os.getenv("CC_OPTS")}
+ if os.getenv("FENNEL_DEBUG") then
+ print("Compiling with", table.concat(compile_command, " "))
+ end
+ if not execute(table.concat(compile_command, " ")) then
+ print("failed:", table.concat(compile_command, " "))
+ os.exit(1)
+ end
+ if not os.getenv("FENNEL_DEBUG") then
+ os.remove(lua_c_path)
+ end
+ return os.exit(0)
+ end
+ local function native_path_3f(path)
+ local _0_0 = path:match("%.(%a+)$")
+ if (_0_0 == "a") then
+ return path
+ elseif (_0_0 == "o") then
+ return path
+ elseif (_0_0 == "so") then
+ return path
+ elseif (_0_0 == "dylib") then
+ return path
+ else
+ local _ = _0_0
+ return false
+ end
+ end
+ local function extract_native_args(args)
+ local native = {libraries = {}, modules = {}}
+ for i = #args, 1, -1 do
+ if ("--native-module" == args[i]) then
+ local path = assert(native_path_3f(table.remove(args, (i + 1))))
+ table.insert(native.modules, 1, path)
+ table.insert(native.libraries, 1, path)
+ table.remove(args, i)
+ end
+ if ("--native-library" == args[i]) then
+ table.insert(native.libraries, 1, assert(native_path_3f(table.remove(args, (i + 1)))))
+ table.remove(args, i)
+ end
+ end
+ if (0 < #args) then
+ print(table.concat(args, " "))
+ error(("Unknown args: " .. table.concat(args, " ")))
+ end
+ return native
+ end
+ local function compile(filename, executable_name, static_lua, lua_include_dir, options, args)
+ local _0_ = extract_native_args(args)
+ local libraries = _0_["libraries"]
+ local modules = _0_["modules"]
+ return compile_binary(write_c(filename, modules, options), executable_name, static_lua, lua_include_dir, libraries)
+ end
+ local help = ("\nUsage: %s --compile-binary FILE OUT STATIC_LUA_LIB LUA_INCLUDE_DIR\n\nCompile a binary from your Fennel program. This functionality is VERY\nexperimental and subject to change in future versions!\n\nRequires a C compiler, a copy of liblua, and Lua's dev headers. Implies\nthe --require-as-include option.\n\n FILE: the Fennel source being compiled.\n OUT: the name of the executable to generate\n STATIC_LUA_LIB: the path to the Lua library to use in the executable\n LUA_INCLUDE_DIR: the path to the directory of Lua C header files\n\nFor example, on a Debian system, to compile a file called program.fnl using\nLua 5.3, you would use this:\n\n $ %s --compile-binary program.fnl program \\\n /usr/lib/x86_64-linux-gnu/liblua5.3.a /usr/include/lua5.3\n\nThe program will be compiled to Lua, then compiled to C, then compiled to\nmachine code. You can set the CC environment variable to change the compiler\nused (default: cc) or set CC_OPTS to pass in compiler options. For example\nset CC_OPTS=-static to generate a binary with static linking.\n\nTo include C libraries that contain Lua modules, add --native-module path/to.so,\nand to include C libraries without modules, use --native-library path/to.so.\nThese options are unstable, barely tested, and even more likely to break.\n\nThis method is currently limited to programs do not transitively require Lua\nmodules. Requiring a Lua module directly will work, but requiring a Lua module\nwhich requires another will fail."):format(arg[0], arg[0])
+ return {compile = compile, help = help}
+end
+package.preload["fennelview"] = package.preload["fennelview"] or function(...)
+ local function view_quote(str)
+ return ("\"" .. str:gsub("\"", "\\\"") .. "\"")
+ end
+ local short_control_char_escapes = {["\11"] = "\\v", ["\12"] = "\\f", ["\13"] = "\\r", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\n"] = "\\n"}
+ local long_control_char_escapes = nil
+ do
+ local long = {}
+ for i = 0, 31 do
+ local ch = string.char(i)
+ if not short_control_char_escapes[ch] then
+ short_control_char_escapes[ch] = ("\\" .. i)
+ long[ch] = ("\\%03d"):format(i)
+ end
+ end
+ long_control_char_escapes = long
+ end
+ local function escape(str)
+ return str:gsub("\\", "\\\\"):gsub("(%c)%f[0-9]", long_control_char_escapes):gsub("%c", short_control_char_escapes)
+ end
+ local function sequence_key_3f(k, len)
+ return ((type(k) == "number") and (1 <= k) and (k <= len) and (math.floor(k) == k))
+ end
+ local type_order = {["function"] = 5, boolean = 2, number = 1, string = 3, table = 4, thread = 7, userdata = 6}
+ local function sort_keys(a, b)
+ local ta = type(a)
+ local tb = type(b)
+ if ((ta == tb) and (ta ~= "boolean") and ((ta == "string") or (ta == "number"))) then
+ return (a < b)
+ else
+ local dta = type_order[a]
+ local dtb = type_order[b]
+ if (dta and dtb) then
+ return (dta < dtb)
+ elseif dta then
+ return true
+ elseif dtb then
+ return false
+ elseif "else" then
+ return (ta < tb)
+ end
+ end
+ end
+ local function get_sequence_length(t)
+ local len = 1
+ for i in ipairs(t) do
+ len = i
+ end
+ return len
+ end
+ local function get_nonsequential_keys(t)
+ local keys = {}
+ local sequence_length = get_sequence_length(t)
+ for k in pairs(t) do
+ if not sequence_key_3f(k, sequence_length) then
+ table.insert(keys, k)
+ end
+ end
+ table.sort(keys, sort_keys)
+ return keys, sequence_length
+ 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
+ end
+ else
+ if (t and (t == t)) then
+ appearances[t] = ((appearances[t] or 0) + 1)
+ end
+ end
+ return appearances
+ end
+ local put_value = nil
+ local function puts(self, ...)
+ for _, v in ipairs({...}) do
+ table.insert(self.buffer, v)
+ end
+ return nil
+ end
+ local function tabify(self)
+ return puts(self, "\n", (self.indent):rep(self.level))
+ end
+ local function already_visited_3f(self, v)
+ return (self.ids[v] ~= nil)
+ end
+ local function get_id(self, v)
+ local id = self.ids[v]
+ if not id then
+ local tv = type(v)
+ id = ((self["max-ids"][tv] or 0) + 1)
+ self["max-ids"][tv] = id
+ self.ids[v] = id
+ end
+ return tostring(id)
+ end
+ local function put_sequential_table(self, t, len)
+ puts(self, "[")
+ self.level = (self.level + 1)
+ for i = 1, len do
+ local _0_ = (1 + len)
+ if ((1 < i) and (i < _0_)) then
+ puts(self, " ")
+ end
+ put_value(self, t[i])
+ end
+ self.level = (self.level - 1)
+ return puts(self, "]")
+ end
+ local function put_key(self, k)
+ if ((type(k) == "string") and k:find("^[-%w?\\^_!$%&*+./@:|<=>]+$")) then
+ return puts(self, ":", k)
+ else
+ return put_value(self, k)
+ end
+ end
+ local function put_kv_table(self, t, ordered_keys)
+ puts(self, "{")
+ self.level = (self.level + 1)
+ for i, k in ipairs(ordered_keys) do
+ if (self["table-edges"] or (i ~= 1)) then
+ tabify(self)
+ end
+ put_key(self, k)
+ puts(self, " ")
+ put_value(self, t[k])
+ end
+ for i, v in ipairs(t) do
+ tabify(self)
+ put_key(self, i)
+ puts(self, " ")
+ put_value(self, v)
+ end
+ self.level = (self.level - 1)
+ if self["table-edges"] then
+ tabify(self)
+ end
+ return puts(self, "}")
+ end
+ local function put_table(self, t)
+ local metamethod = nil
+ local function _1_()
+ local _0_0 = t
+ if _0_0 then
+ local _2_0 = getmetatable(_0_0)
+ if _2_0 then
+ return _2_0.__fennelview
+ else
+ return _2_0
+ end
+ else
+ return _0_0
+ end
+ end
+ metamethod = (self["metamethod?"] and _1_())
+ if (already_visited_3f(self, t) and self["detect-cycles?"]) then
+ return puts(self, "#<table ", get_id(self, t), ">")
+ elseif (self.level >= self.depth) then
+ return puts(self, "{...}")
+ elseif metamethod then
+ return puts(self, metamethod(t, self.fennelview))
+ elseif "else" then
+ local non_seq_keys, len = get_nonsequential_keys(t)
+ local id = get_id(self, t)
+ if ((1 < (self.appearances[t] or 0)) and self["detect-cycles?"]) then
+ return puts(self, "#<table", id, ">")
+ elseif ((#non_seq_keys == 0) and (#t == 0)) then
+ local function _2_()
+ if self["empty-as-square"] then
+ return "[]"
+ else
+ return "{}"
+ end
+ end
+ return puts(self, _2_())
+ elseif (#non_seq_keys == 0) then
+ return put_sequential_table(self, t, len)
+ elseif "else" then
+ return put_kv_table(self, t, non_seq_keys)
+ end
+ end
+ end
+ local function _0_(self, v)
+ local tv = type(v)
+ if (tv == "string") then
+ return puts(self, view_quote(escape(v)))
+ elseif ((tv == "number") or (tv == "boolean") or (tv == "nil")) then
+ return puts(self, tostring(v))
+ elseif (tv == "table") then
+ return put_table(self, v)
+ elseif "else" then
+ return puts(self, "#<", tostring(v), ">")
+ end
+ end
+ put_value = _0_
+ local function one_line(str)
+ local ret = str:gsub("\n", " "):gsub("%[ ", "["):gsub(" %]", "]"):gsub("%{ ", "{"):gsub(" %}", "}"):gsub("%( ", "("):gsub(" %)", ")")
+ return ret
+ end
+ local function fennelview(x, options)
+ local options0 = (options or {})
+ local inspector = nil
+ local function _1_(_241)
+ return fennelview(_241, options0)
+ end
+ local function _2_()
+ if options0["one-line"] then
+ return ""
+ else
+ return " "
+ end
+ end
+ inspector = {["detect-cycles?"] = not (false == options0["detect-cycles?"]), ["empty-as-square"] = options0["empty-as-square"], ["max-ids"] = {}, ["metamethod?"] = not (false == options0["metamethod?"]), ["table-edges"] = (options0["table-edges"] ~= false), appearances = count_table_appearances(x, {}), buffer = {}, depth = (options0.depth or 128), fennelview = _1_, ids = {}, indent = (options0.indent or _2_()), level = 0}
+ put_value(inspector, x)
+ local str = table.concat(inspector.buffer)
+ if options0["one-line"] then
+ return one_line(str)
+ else
+ return str
+ end
+ end
+ return fennelview
+end
+local fennel = nil
+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(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 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 = utils["wrap-env"](options.env)
+ else
+ env = setmetatable({}, {__index = (_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)
+ chars[(#chars + 1)] = 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 loop()
+ for k in pairs(chars) do
+ chars[k] = nil
+ end
+ local ok, parse_ok_3f, x = pcall(read)
+ local src_string = string.char((_G.unpack or table.unpack)(chars))
+ utils.root.options = opts
+ if not ok then
+ on_error("Parse", parse_ok_3f)
+ clear_stream()
+ reset()
+ return loop()
+ 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 source = _5_0
+ local source0 = nil
+ if save_locals_3f then
+ source0 = splice_save_locals(env, source)
+ else
+ source0 = source
+ end
+ local lua_ok_3f, loader = pcall(specials["load-code"], source0, env)
+ if not lua_ok_3f then
+ clear_stream()
+ on_error("Lua Compile", loader, source0)
+ else
+ local _7_0, _8_0 = nil, nil
+ local function _9_()
+ return {loader()}
+ end
+ local function _10_(...)
+ return on_error("Runtime", ...)
+ end
+ _7_0, _8_0 = xpcall(_9_, _10_)
+ if ((_7_0 == true) and (nil ~= _8_0)) then
+ local ret = _8_0
+ env._ = ret[1]
+ env.__ = ret
+ on_values(utils.map(ret, pp))
+ end
+ end
+ end
+ end
+ utils.root.options = old_root_options
+ return loop()
+ end
+ end
+ end
+ return loop()
+ end
+ return repl
+end
+package.preload["fennel.specials"] = package.preload["fennel.specials"] or function(...)
+ local utils = require("fennel.utils")
+ local parser = require("fennel.parser")
+ local compiler = require("fennel.compiler")
+ local unpack = (_G.unpack or table.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 _ENV) or _G)
+ if (_G.setfenv and _G.loadstring) then
+ local f = assert(_G.loadstring(code, filename))
+ _G.setfenv(f, environment0)
+ return f
+ else
+ return assert(load(code, filename, "t", environment0))
+ end
+ end
+ local function doc_2a(tgt, name)
+ if not tgt then
+ return (name .. " not found")
+ else
+ local docstring = (((compiler.metadata):get(tgt, "fnl/docstring") or "#<undocumented>")):gsub("\n$", ""):gsub("\n", "\n ")
+ if (type(tgt) == "function") then
+ local arglist = table.concat(((compiler.metadata):get(tgt, "fnl/arglist") or {"#<unknown-arguments>"}), " ")
+ local _0_
+ if (#arglist > 0) then
+ _0_ = " "
+ else
+ _0_ = ""
+ end
+ return string.format("(%s%s%s)\n %s", name, _0_, arglist, docstring)
+ else
+ return string.format("%s\n %s", name, docstring)
+ end
+ end
+ end
+ local function doc_special(name, arglist, docstring)
+ 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 outer_target = opts.target
+ local outer_tail = opts.tail
+ local retexprs = {returned = true}
+ if (not outer_target and (opts.nval ~= 0) and not outer_tail) then
+ if opts.nval then
+ local syms = {}
+ for i = 1, opts.nval, 1 do
+ local s = ((pre_syms and pre_syms[i]) or compiler.gensym(scope))
+ syms[i] = s
+ retexprs[i] = utils.expr(s, "sym")
+ end
+ outer_target = table.concat(syms, ", ")
+ compiler.emit(parent, ("local %s"):format(outer_target), ast)
+ compiler.emit(parent, "do", ast)
+ else
+ local fname = compiler.gensym(scope)
+ local fargs = ((scope.vararg and "...") or "")
+ compiler.emit(parent, ("local function %s(%s)"):format(fname, fargs), ast)
+ retexprs = utils.expr((fname .. "(" .. fargs .. ")"), "statement")
+ outer_tail = true
+ outer_target = nil
+ end
+ else
+ compiler.emit(parent, "do", ast)
+ end
+ 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)}
+ 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 retexprs
+ 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)})
+ exprs[(#exprs + 1)] = subexprs[1]
+ if (i == len) then
+ for j = 2, #subexprs, 1 do
+ exprs[(#exprs + 1)] = subexprs[j]
+ end
+ end
+ end
+ return exprs
+ end
+ doc_special("values", {"..."}, "Return multiple values from a function. Must be in tail position.")
+ SPECIALS.fn = function(ast, scope, parent)
+ local index, fn_name, is_local_fn, docstring = 2, utils["is-sym"](ast[2])
+ 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 multi = (fn_name and utils["is-multi-sym"](fn_name[1]))
+ compiler.assert((not multi or not multi["multi-sym-method-call"]), ("unexpected multi symbol " .. tostring(fn_name)), ast[index])
+ if (fn_name and (fn_name[1] ~= "nil")) then
+ is_local_fn = not multi
+ if is_local_fn then
+ fn_name = compiler["declare-local"](fn_name, {}, scope, ast)
+ else
+ fn_name = compiler["symbol-to-expression"](fn_name, scope)[1]
+ end
+ index = (index + 1)
+ else
+ is_local_fn = true
+ fn_name = compiler.gensym(scope)
+ end
+ do
+ local arg_list = nil
+ local function _2_()
+ if (type(ast[index]) == "table") then
+ return ast[index]
+ else
+ return ast
+ end
+ end
+ arg_list = compiler.assert(utils["is-table"](ast[index]), "expected parameters", _2_())
+ local function get_arg_name(i, name)
+ if utils["is-varg"](name) then
+ compiler.assert((i == #arg_list), "expected vararg as last parameter", ast[2])
+ f_scope.vararg = true
+ return "..."
+ elseif (utils["is-sym"](name) and (utils.deref(name) ~= "nil") and not utils["is-multi-sym"](utils.deref(name))) then
+ return compiler["declare-local"](name, {}, f_scope, ast)
+ elseif utils["is-table"](name) then
+ local raw = utils.sym(compiler.gensym(scope))
+ local declared = compiler["declare-local"](raw, {}, f_scope, ast)
+ compiler.destructure(name, raw, ast, f_scope, f_chunk, {declaration = true, nomulti = true})
+ return declared
+ else
+ return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(name)), ast[2])
+ end
+ end
+ local arg_name_list = utils.kvmap(arg_list, get_arg_name)
+ if ((type(ast[(index + 1)]) == "string") and ((index + 1) < #ast)) then
+ index = (index + 1)
+ docstring = ast[index]
+ end
+ for i = (index + 1), #ast, 1 do
+ compiler.compile1(ast[i], f_scope, f_chunk, {nval = (((i ~= #ast) and 0) or nil), tail = (i == #ast)})
+ end
+ if is_local_fn then
+ compiler.emit(parent, ("local function %s(%s)"):format(fn_name, table.concat(arg_name_list, ", ")), ast)
+ else
+ compiler.emit(parent, ("%s = function(%s)"):format(fn_name, table.concat(arg_name_list, ", ")), ast)
+ end
+ compiler.emit(parent, f_chunk, ast)
+ compiler.emit(parent, "end", ast)
+ if utils.root.options.useMetadata then
+ local args = nil
+ local function _5_(v)
+ if utils["is-table"](v) then
+ return "\"#<table>\""
+ else
+ return ("\"%s\""):format(tostring(v))
+ end
+ end
+ args = utils.map(arg_list, _5_)
+ 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"))
+ compiler.emit(parent, ("pcall(function() %s:setall(%s, %s) end)"):format(meta_str, fn_name, table.concat(meta_fields, ", ")))
+ end
+ end
+ return utils.expr(fn_name, "sym")
+ 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) 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([[%s]])"):format(doc_2a(special_or_macro, target))
+ else
+ local value = tostring(compiler.compile1(ast[2], scope, parent, {nval = 1})[1])
+ return ("print(require('%s').doc(%s, '%s'))"):format((utils.root.options.moduleName or "fennel"), 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 lhs = compiler.compile1(ast[2], scope, parent, {nval = 1})
+ if (len == 2) then
+ return tostring(lhs[1])
+ else
+ local indices = {}
+ for i = 3, len, 1 do
+ local index = ast[i]
+ if ((type(index) == "string") and utils["is-valid-lua-identifier"](index)) then
+ table.insert(indices, ("." .. index))
+ else
+ index = compiler.compile1(index, scope, parent, {nval = 1})[1]
+ table.insert(indices, ("[" .. tostring(index) .. "]"))
+ end
+ end
+ if utils["is-table"](ast[2]) then
+ return ("(" .. tostring(lhs[1]) .. ")" .. table.concat(indices))
+ else
+ return (tostring(lhs[1]) .. 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})
+ 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})
+ 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})
+ 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})
+ 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})
+ 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["is-list"](bindings) or utils["is-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), 1 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})
+ 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), 1 do
+ local key = compiler.compile1(ast[i], scope, parent, {nval = 1})[1]
+ keys[(#keys + 1)] = 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 if_2a(ast, scope, parent, opts)
+ local do_scope = compiler["make-scope"](scope)
+ local branches = {}
+ local has_else = ((#ast > 3) and ((#ast % 2) == 0))
+ local else_branch = nil
+ local wrapper, inner_tail, inner_target, target_exprs = nil
+ if (opts.tail or opts.target or opts.nval) then
+ if (opts.nval and (opts.nval ~= 0) and not opts.target) then
+ local accum = {}
+ target_exprs = {}
+ for i = 1, opts.nval, 1 do
+ local s = compiler.gensym(scope)
+ accum[i] = s
+ target_exprs[i] = utils.expr(s, "sym")
+ end
+ wrapper, inner_tail, inner_target = "target", opts.tail, table.concat(accum, ", ")
+ else
+ wrapper, inner_tail, inner_target = "none", opts.tail, opts.target
+ end
+ else
+ wrapper, inner_tail, inner_target = "iife", true, nil
+ end
+ 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
+ if has_else then
+ else_branch = compile_body(#ast)
+ end
+ 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)) 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 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, 1 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, 1 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.")
+ SPECIALS.each = function(ast, scope, parent)
+ compiler.assert((#ast >= 3), "expected body expression", ast[1])
+ local binding = compiler.assert(utils["is-table"](ast[2]), "expected binding table", ast)
+ 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["is-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})
+ end
+ compiler["apply-manglings"](sub_scope, new_manglings, ast)
+ 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, 1 do
+ sub_chunk[(#sub_chunk + 1)] = 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["is-table"](ast[2]), "expected binding table", ast)
+ local binding_sym = table.remove(ast[2], 1)
+ local sub_scope = compiler["make-scope"](scope)
+ local range_args = {}
+ local chunk = {}
+ compiler.assert(utils["is-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), 1 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_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 once(val, ast, scope, parent)
+ if ((val.type == "statement") or (val.type == "expression")) then
+ local s = compiler.gensym(scope)
+ compiler.emit(parent, ("local %s = %s"):format(s, tostring(val)), ast)
+ return utils.expr(s, "sym")
+ else
+ return val
+ end
+ end
+ local function method_call(ast, scope, parent)
+ compiler.assert((#ast >= 3), "expected at least 2 arguments", ast)
+ local objectexpr = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
+ local methodident, methodstring = false
+ if ((type(ast[3]) == "string") and utils["is-valid-lua-identifier"](ast[3])) then
+ methodident = true
+ methodstring = ast[3]
+ else
+ methodstring = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1])
+ objectexpr = once(objectexpr, ast[2], scope, parent)
+ end
+ local args = {}
+ for i = 4, #ast, 1 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
+ local fstring = nil
+ if not methodident then
+ table.insert(args, 1, tostring(objectexpr))
+ if (objectexpr.type == "sym") then
+ fstring = "%s[%s](%s)"
+ else
+ fstring = "(%s)[%s](%s)"
+ end
+ elseif ((objectexpr.type == "literal") or (objectexpr.type == "expression")) then
+ fstring = "(%s):%s(%s)"
+ else
+ fstring = "%s:%s(%s)"
+ end
+ return utils.expr(fstring:format(tostring(objectexpr), methodstring, table.concat(args, ", ")), "statement")
+ 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, 1 do
+ els[(#els + 1)] = tostring(ast[i]):gsub("\n", " ")
+ end
+ return compiler.emit(parent, ("-- " .. table.concat(els, " ")), ast)
+ end
+ doc_special("comment", {"..."}, "Comment which will be emitted in Lua output.")
+ 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)
+ compiler["declare-local"](symbol, {}, scope, ast)
+ local args = {}
+ 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["is-sym"](node) and (utils.deref(node) == "$...")) then
+ parent_node[idx] = utils.varg()
+ f_scope.vararg = true
+ return nil
+ else
+ return (utils["is-list"](node) or utils["is-table"](node))
+ end
+ end
+ utils["walk-tree"](ast[2], walker)
+ compiler.compile1(ast[2], f_scope, f_chunk, {tail = true})
+ local max_used = 0
+ for i = 1, 9, 1 do
+ if f_scope.symmeta[("$" .. i)].used then
+ max_used = i
+ end
+ end
+ if f_scope.vararg then
+ compiler.assert((max_used == 0), "$ and $... in hashfn are mutually exclusive", ast)
+ args = {utils.deref(utils.varg())}
+ max_used = 1
+ end
+ local arg_str = table.concat(args, ", ", 1, max_used)
+ compiler.emit(parent, ("local function %s(%s)"):format(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 define_arithmetic_special(name, zero_arity, unary_prefix, lua_name)
+ do
+ local padded_op = (" " .. (lua_name or name) .. " ")
+ local function _0_(ast, scope, parent)
+ local len = #ast
+ if (len == 1) then
+ compiler.assert((zero_arity ~= nil), "Expected more than 0 arguments", ast)
+ return utils.expr(zero_arity, "literal")
+ else
+ local operands = {}
+ for i = 2, len, 1 do
+ local subexprs = nil
+ local _1_
+ if (i == 1) then
+ _1_ = 1
+ else
+ _1_ = nil
+ end
+ subexprs = compiler.compile1(ast[i], scope, parent, {nval = _1_})
+ 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
+ SPECIALS[name] = _0_
+ end
+ 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")
+ define_arithmetic_special("lshift", nil, "1", "<<")
+ define_arithmetic_special("rshift", nil, "1", ">>")
+ define_arithmetic_special("band", "0", "0", "&")
+ define_arithmetic_special("bor", "0", "0", "|")
+ define_arithmetic_special("bxor", "0", "0", "~")
+ doc_special("lshift", {"x", "n"}, "Bitwise logical left shift of x by n bits; only works in Lua 5.3+.")
+ doc_special("rshift", {"x", "n"}, "Bitwise logical right shift of x by n bits; only works in Lua 5.3+.")
+ doc_special("band", {"x1", "x2"}, "Bitwise AND of arguments; only works in Lua 5.3+.")
+ doc_special("bor", {"x1", "x2"}, "Bitwise OR of arguments; only works in Lua 5.3+.")
+ doc_special("bxor", {"x1", "x2"}, "Bitwise XOR of arguments; only works in Lua 5.3+.")
+ 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 define_comparator_special(name, realop, chain_op)
+ do
+ local op = (realop or name)
+ local function opfn(ast, scope, parent)
+ local len = #ast
+ compiler.assert((len > 2), "expected at least two arguments", ast)
+ local lhs = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
+ local lastval = compiler.compile1(ast[3], scope, parent, {nval = 1})[1]
+ if (len > 3) then
+ lastval = once(lastval, ast[3], scope, parent)
+ end
+ local out = ("(%s %s %s)"):format(tostring(lhs), op, tostring(lastval))
+ if (len > 3) then
+ for i = 4, len do
+ local nextval = once(compiler.compile1(ast[i], scope, parent, {nval = 1})[1], ast[i], scope, parent)
+ out = ((out .. " %s (%s %s %s)")):format((chain_op or "and"), tostring(lastval), op, tostring(nextval))
+ lastval = nextval
+ end
+ out = ("(" .. out .. ")")
+ end
+ return out
+ 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")
+ SPECIALS["~="] = SPECIALS["not="]
+ 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+.")
+ define_unary_special("length", "#")
+ doc_special("length", {"x"}, "Returns the length of a table or string.")
+ 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 function make_compiler_env(ast, scope, parent)
+ local function _0_()
+ return compiler.scopes.macro
+ end
+ local function _1_(symbol)
+ compiler.assert(compiler.scopes.macro, "must call from macro", ast)
+ return compiler.scopes.macro.manglings[tostring(symbol)]
+ end
+ local function _2_()
+ return utils.sym(compiler.gensym((compiler.scopes.macro or scope)))
+ end
+ local function _3_(form)
+ compiler.assert(compiler.scopes.macro, "must call from macro", ast)
+ return compiler.macroexpand(form, compiler.scopes.macro)
+ end
+ return setmetatable({["get-scope"] = _0_, ["in-scope?"] = _1_, ["list?"] = utils["is-list"], ["multi-sym?"] = utils["is-multi-sym"], ["sequence?"] = utils["is-sequence"], ["sym?"] = utils["is-sym"], ["table?"] = utils["is-table"], ["varg?"] = utils["is-varg"], _AST = ast, _CHUNK = parent, _IS_COMPILER = true, _SCOPE = scope, _SPECIALS = compiler.scopes.global.specials, _VARARG = utils.varg(), fennel = utils["fennel-module"], gensym = _2_, list = utils.list, macroexpand = _3_, sequence = utils.sequence, sym = utils.sym, unpack = unpack}, {__index = (_ENV or _G)})
+ 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 _0_0 = (io.open(filename) or io.open(filename2))
+ if (nil ~= _0_0) then
+ local file = _0_0
+ file:close()
+ return filename
+ end
+ end
+ local function find_in_path(start)
+ local _0_0 = fullpath:match(pattern, start)
+ if (nil ~= _0_0) then
+ local path = _0_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 opts = utils.copy(utils.root.options)
+ for k, v in pairs((options or {})) do
+ opts[k] = v
+ end
+ local function _0_(module_name)
+ local filename = search_module(module_name)
+ if filename then
+ local function _1_(mod_name)
+ return utils["fennel-module"].dofile(filename, opts, mod_name)
+ end
+ return _1_
+ end
+ end
+ return _0_
+ 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 add_macros(macros_2a, ast, scope)
+ compiler.assert(utils["is-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
+ local function load_macros(modname, ast, scope, parent)
+ local filename = compiler.assert(search_module(modname), (modname .. " module not found."), ast)
+ local env = make_compiler_env(ast, scope, parent)
+ local globals = macro_globals(env, current_global_names())
+ return utils["fennel-module"].dofile(filename, {allowedGlobals = globals, env = env, scope = compiler.scopes.compiler, useMetadata = utils.root.options.useMetadata})
+ end
+ local macro_loaded = {}
+ SPECIALS["require-macros"] = function(ast, scope, parent)
+ compiler.assert((#ast == 2), "Expected one module name argument", ast)
+ local modname = ast[2]
+ if not macro_loaded[modname] then
+ macro_loaded[modname] = load_macros(modname, ast, scope, parent)
+ 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_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 = {nval = 1, 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 _0_()
+ return f:read("*all"):gsub("[\13\n]*$", "")
+ end
+ src = close_handlers_0_(xpcall(_0_, (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_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 _1_()
+ local _0_0 = search_module(mod)
+ if (nil ~= _0_0) then
+ local fennel_path = _0_0
+ return include_path(ast, opts, fennel_path, mod, true)
+ else
+ local _ = _0_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 _1_())
+ 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 scope0 = compiler["make-scope"](compiler.scopes.compiler)
+ local luasrc = compiler.compile(ast, {scope = scope0, useMetadata = utils.root.options.useMetadata})
+ local loader = load_code(luasrc, wrap_env(make_compiler_env(ast, scope0, parent)))
+ return loader()
+ 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, ["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 = (_G.unpack or table.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_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
+ local m = getmetatable(ast)
+ local filename = ((m and m.filename) or ast.filename or "unknown")
+ local line = ((m and m.line) or ast.line or "?")
+ local target = nil
+ local function _1_()
+ if utils["is-sym"](ast[1]) then
+ return utils.deref(ast[1])
+ else
+ return (ast[1] or "()")
+ end
+ end
+ target = tostring(_1_())
+ error(string.format("Compile error in '%s' %s:%s: %s", target, filename, line, 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 ("%q"):format(str):gsub(".", serialize_subst):gsub("[\128-\255]", _0_)
+ end
+ local function global_mangling(str)
+ if utils["is-valid-lua-identifier"](str) then
+ return str
+ else
+ local function _0_(_241)
+ return ("_%02x"):format(_241:byte())
+ end
+ return ("__fnl_global__" .. str:gsub("[^%w]", _0_))
+ end
+ end
+ local function global_unmangling(identifier)
+ local _0_0 = identifier:match("^__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 = rest:gsub("_[%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)
+ local found_3f = not allowed_globals
+ if not allowed_globals then
+ return true
+ else
+ for _, g in ipairs(allowed_globals) do
+ if (g == name) then
+ found_3f = true
+ end
+ end
+ return found_3f
+ end
+ end
+ local function local_mangling(str, scope, ast, temp_manglings)
+ local append = 0
+ local mangling = str
+ assert_compile(not utils["is-multi-sym"](str), ("unexpected multi symbol " .. str), ast)
+ if (utils["lua-keywords"][mangling] or mangling:match("^%d")) then
+ mangling = ("_" .. mangling)
+ end
+ local function _1_(_241)
+ return ("_%02x"):format(_241:byte())
+ end
+ mangling = mangling:gsub("-", "_"):gsub("[^%w_]", _1_)
+ local raw = mangling
+ while scope.unmanglings[mangling] do
+ mangling = (raw .. append)
+ append = (append + 1)
+ end
+ scope.unmanglings[mangling] = str
+ do
+ local manglings = (temp_manglings or scope.manglings)
+ manglings[str] = mangling
+ end
+ return mangling
+ 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, 1 do
+ if utils["is-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] = true
+ return mangling
+ end
+ local function autogensym(base, scope)
+ local _0_0 = utils["is-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 function check_binding_valid(symbol, scope, ast)
+ local name = utils.deref(symbol)
+ 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["is-quoted"](symbol), ("macro tried to bind %s without gensym"):format(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["is-multi-sym"](name), ("unexpected multi symbol " .. name), ast)
+ scope.symmeta[name] = meta
+ return local_mangling(name, scope, ast, temp_manglings)
+ end
+ local function symbol_to_expression(symbol, scope, is_reference)
+ local name = symbol[1]
+ local multi_sym_parts = utils["is-multi-sym"](name)
+ if scope.hashfn then
+ if (name == "$") then
+ name = "$1"
+ end
+ if multi_sym_parts then
+ if (multi_sym_parts[1] == "$") then
+ multi_sym_parts[1] = "$1"
+ name = table.concat(multi_sym_parts, ".")
+ end
+ end
+ end
+ local parts = (multi_sym_parts or {name})
+ local etype = (((#parts > 1) and "expression") or "sym")
+ local is_local = scope.manglings[parts[1]]
+ if (is_local and scope.symmeta[parts[1]]) then
+ scope.symmeta[parts[1]]["used"] = true
+ end
+ assert_compile((not is_reference or is_local or global_allowed(parts[1])), ("unknown global in strict mode: " .. parts[1]), symbol)
+ if (allowed_globals and not is_local) 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), 1 do
+ table.insert(new_chunk, peephole(chunk[i]))
+ end
+ for i = 1, #kid, 1 do
+ table.insert(new_chunk, kid[i])
+ end
+ return new_chunk
+ else
+ return utils.map(chunk, peephole)
+ end
+ end
+ local function flatten_chunk_correlated(main_chunk)
+ 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
+ if (subchunk.ast and (file == subchunk.ast.file)) then
+ last_line0 = math.max(last_line0, (subchunk.ast.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
+ sm[(#sm + 1)] = ((info and info.line) or ( - 1))
+ 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
+ sub = (tab0 .. sub:gsub("\n", ("\n" .. tab0)))
+ end
+ return sub
+ 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
+ local key, short_src = nil
+ if options.filename then
+ short_src = options.filename
+ key = ("@" .. short_src)
+ else
+ key = ret
+ short_src = make_short_src((options.source or ret))
+ end
+ sm.short_src = short_src
+ sm.key = key
+ fennel_sourcemap[key] = sm
+ end
+ return ret, sm
+ end
+ end
+ local function make_metadata()
+ local function _0_(self, tgt, key)
+ if self[tgt] then
+ return self[tgt][key]
+ end
+ end
+ local function _1_(self, tgt, key, value)
+ self[tgt] = (self[tgt] or {})
+ self[tgt][key] = value
+ return tgt
+ end
+ local function _2_(self, tgt, ...)
+ local kv_len = select("#", ...)
+ local kvs = {...}
+ if ((kv_len % 2) ~= 0) then
+ error("metadata:setall() expected even number of k/v pairs")
+ end
+ self[tgt] = (self[tgt] or {})
+ for i = 1, kv_len, 2 do
+ self[tgt][kvs[i]] = kvs[(i + 1)]
+ end
+ return tgt
+ end
+ return setmetatable({}, {__index = {get = _0_, set = _1_, setall = _2_}, __mode = "k"})
+ end
+ local function exprs1(exprs)
+ return table.concat(utils.map(exprs, 1), ", ")
+ end
+ local function keep_side_effects(exprs, chunk, start, ast)
+ local start0 = (start or 1)
+ for j = start0, #exprs, 1 do
+ local se = exprs[j]
+ if ((se.type == "expression") and (se[1] ~= "nil")) then
+ emit(chunk, ("do local _ = %s end"):format(tostring(se)), ast)
+ elseif (se.type == "statement") then
+ local code = tostring(se)
+ emit(chunk, (((code:byte() == 40) and ("do end " .. code)) or 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, 1 do
+ exprs[i] = nil
+ end
+ else
+ for i = (#exprs + 1), n, 1 do
+ exprs[i] = utils.expr("nil", "literal")
+ end
+ end
+ end
+ end
+ if opts.tail then
+ emit(parent, ("return %s"):format(exprs1(exprs)), ast)
+ end
+ if opts.target then
+ local result = exprs1(exprs)
+ if (result == "") then
+ result = "nil"
+ end
+ emit(parent, ("%s = %s"):format(opts.target, result), ast)
+ end
+ if (opts.tail or opts.target) then
+ return {}
+ else
+ return exprs
+ end
+ end
+ local function macroexpand_2a(ast, scope, once)
+ if not utils["is-list"](ast) then
+ return ast
+ else
+ local multi_sym_parts = utils["is-multi-sym"](ast[1])
+ local macro_2a = (utils["is-sym"](ast[1]) and scope.macros[utils.deref(ast[1])])
+ if (not macro_2a and multi_sym_parts) then
+ local in_macro_module = nil
+ macro_2a = scope.macros
+ for i = 1, #multi_sym_parts, 1 do
+ macro_2a = (utils["is-table"](macro_2a) and macro_2a[multi_sym_parts[i]])
+ if macro_2a then
+ in_macro_module = true
+ end
+ end
+ assert_compile((not in_macro_module or (type(macro_2a) == "function")), "macro not found in imported macro module", ast)
+ end
+ if not macro_2a then
+ return ast
+ else
+ local old_scope = scopes.macro
+ local _ = nil
+ scopes.macro = scope
+ _ = nil
+ local ok, transformed = pcall(macro_2a, unpack(ast, 2))
+ scopes.macro = old_scope
+ assert_compile(ok, transformed, ast)
+ if (once or not transformed) then
+ return transformed
+ else
+ return macroexpand_2a(transformed, scope)
+ end
+ end
+ end
+ end
+ local function compile1(ast, scope, parent, opts)
+ local opts0 = (opts or {})
+ local ast0 = macroexpand_2a(ast, scope)
+ local exprs = {}
+ if utils["is-list"](ast0) then
+ local len = #ast0
+ local first = ast0[1]
+ local multi_sym_parts = utils["is-multi-sym"](first)
+ local special = (utils["is-sym"](first) and scope.specials[utils.deref(first)])
+ assert_compile((#ast0 > 0), "expected a function, macro, or special to call", ast0)
+ if special then
+ exprs = (special(ast0, scope, parent, opts0) or utils.expr("nil", "literal"))
+ if (type(exprs) == "string") then
+ exprs = utils.expr(exprs, "expression")
+ end
+ if utils["is-expr"](exprs) then
+ exprs = {exprs}
+ end
+ if not exprs.returned then
+ exprs = handle_compile_opts(exprs, parent, opts0, ast0)
+ elseif (opts0.tail or opts0.target) then
+ exprs = {}
+ end
+ 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(":", scope), utils.sym(table_with_method, scope), method_to_call)
+ for i = 2, len, 1 do
+ new_ast[(#new_ast + 1)] = ast0[i]
+ end
+ exprs = compile1(new_ast, scope, parent, opts0)
+ else
+ local fargs = {}
+ local fcallee = compile1(ast0[1], scope, parent, {nval = 1})[1]
+ assert_compile((fcallee.type ~= "literal"), ("cannot call literal value " .. tostring(ast0[1])), ast0)
+ fcallee = tostring(fcallee)
+ for i = 2, len, 1 do
+ local subexprs = compile1(ast0[i], scope, parent, {nval = (((i ~= len) and 1) or nil)})
+ fargs[(#fargs + 1)] = (subexprs[1] or utils.expr("nil", "literal"))
+ if (i == len) then
+ for j = 2, #subexprs, 1 do
+ fargs[(#fargs + 1)] = subexprs[j]
+ end
+ else
+ keep_side_effects(subexprs, parent, 2, ast0[i])
+ end
+ end
+ local call = ("%s(%s)"):format(tostring(fcallee), exprs1(fargs))
+ exprs = handle_compile_opts({utils.expr(call, "statement")}, parent, opts0, ast0)
+ end
+ elseif utils["is-varg"](ast0) then
+ assert_compile(scope.vararg, "unexpected vararg", ast0)
+ exprs = handle_compile_opts({utils.expr("...", "varg")}, parent, opts0, ast0)
+ elseif utils["is-sym"](ast0) then
+ local multi_sym_parts = utils["is-multi-sym"](ast0)
+ local e = nil
+ assert_compile(not (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]), "multisym method calls may only be in call position", ast0)
+ if (ast0[1] == "nil") then
+ e = utils.expr("nil", "literal")
+ else
+ e = symbol_to_expression(ast0, scope, true)
+ end
+ exprs = handle_compile_opts({e}, parent, opts0, ast0)
+ elseif ((type(ast0) == "nil") or (type(ast0) == "boolean")) then
+ exprs = handle_compile_opts({utils.expr(tostring(ast0), "literal")}, parent, opts0)
+ elseif (type(ast0) == "number") then
+ local n = ("%.17g"):format(ast0)
+ exprs = handle_compile_opts({utils.expr(n, "literal")}, parent, opts0)
+ elseif (type(ast0) == "string") then
+ local s = serialize_string(ast0)
+ exprs = handle_compile_opts({utils.expr(s, "literal")}, parent, opts0)
+ elseif (type(ast0) == "table") then
+ local buffer = {}
+ for i = 1, #ast0, 1 do
+ local nval = ((i ~= #ast0) and 1)
+ buffer[(#buffer + 1)] = exprs1(compile1(ast0[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 > #ast0)) then
+ if ((type(k) == "string") and utils["is-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(ast0, 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_(k)
+ local v = tostring(compile1(ast0[k[2]], scope, parent, {nval = 1})[1])
+ return ("%s = %s"):format(k[1], v)
+ end
+ utils.map(keys, _1_, buffer)
+ end
+ exprs = handle_compile_opts({utils.expr(("{" .. table.concat(buffer, ", ") .. "}"), "expression")}, parent, opts0, ast0)
+ else
+ assert_compile(false, ("could not compile value of type " .. type(ast0)), ast0)
+ end
+ exprs.returned = true
+ return exprs
+ 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 nomulti = _0_["nomulti"]
+ local noundef = _0_["noundef"]
+ 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 (nomulti and utils["is-multi-sym"](raw)), ("unexpected multi symbol " .. raw), up1)
+ if declaration then
+ return declare_local(symbol, {var = isvar}, scope, symbol, new_manglings)
+ else
+ local parts = (utils["is-multi-sym"](raw) or {raw})
+ local meta = scope.symmeta[parts[1]]
+ if ((#parts == 1) and not forceset) then
+ assert_compile(not (forceglobal and meta), ("global %s conflicts with local"):format(tostring(symbol)), symbol)
+ assert_compile(not (meta and not meta.var), ("expected var " .. raw), symbol)
+ assert_compile((meta or not 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)
+ else
+ table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue .. " = " .. init)})
+ end
+ end
+ return ret
+ end
+ local function destructure1(left, rightexprs, up1, top)
+ if (utils["is-sym"](left) and (left[1] ~= "nil")) then
+ local lname = getname(left, up1)
+ check_binding_valid(left, scope, left)
+ if top then
+ compile_top_target({lname})
+ else
+ emit(parent, setter:format(lname, exprs1(rightexprs)), left)
+ end
+ elseif utils["is-table"](left) then
+ local s = gensym(scope)
+ local right = nil
+ if top then
+ right = exprs1(compile1(from, scope, parent))
+ else
+ right = exprs1(rightexprs)
+ end
+ if (right == "") then
+ right = "nil"
+ end
+ emit(parent, ("local %s = %s"):format(s, right), left)
+ for k, v in utils.stablepairs(left) do
+ if (utils["is-sym"](left[k]) and (left[k][1] == "&")) then
+ assert_compile(((type(k) == "number") and not left[(k + 2)]), "expected rest argument before last parameter", left)
+ local formatted = ("{(table.unpack or unpack)(%s, %s)}"):format(s, k)
+ local subexpr = utils.expr(formatted, "expression")
+ destructure1(left[(k + 1)], {subexpr}, left)
+ return
+ else
+ if (utils["is-sym"](k) and (tostring(k) == ":") and utils["is-sym"](v)) then
+ k = tostring(v)
+ end
+ if (type(k) ~= "number") then
+ k = serialize_string(k)
+ end
+ local subexpr = utils.expr(("%s[%s]"):format(s, k), "expression")
+ destructure1(v, {subexpr}, left)
+ end
+ end
+ elseif utils["is-list"](left) then
+ local left_names, tables = {}, {}
+ for i, name in ipairs(left) do
+ local symname = nil
+ if utils["is-sym"](name) then
+ symname = getname(name, up1)
+ else
+ symname = gensym(scope)
+ tables[i] = {name, utils.expr(symname, "sym")}
+ end
+ table.insert(left_names, symname)
+ end
+ if top then
+ compile_top_target(left_names)
+ else
+ local lvalue = table.concat(left_names, ", ")
+ local setting = setter:format(lvalue, exprs1(rightexprs))
+ emit(parent, setting, left)
+ end
+ for _, pair in utils.stablepairs(tables) do
+ destructure1(pair[1], {pair[2]}, left)
+ end
+ else
+ assert_compile(false, ("unable to bind %s %s"):format(type(left), tostring(left)), (((type(up1[2]) == "table") and up1[2]) or up1))
+ end
+ if top then
+ return {returned = true}
+ end
+ end
+ local ret = destructure1(to, nil, ast, true)
+ apply_manglings(scope, new_manglings, ast)
+ return ret
+ end
+ local function require_include(ast, scope, parent, opts)
+ opts.fallback = function(e)
+ return utils.expr(("require(%s)"):format(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 ok, val in parser.parser(strm, opts.filename, opts) do
+ vals[(#vals + 1)] = val
+ end
+ for i = 1, #vals, 1 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 (" [C]: in function '%s'"):format(info.name)
+ elseif (info.what == "C") then
+ return " [C]: in ?"
+ else
+ local remap = fennel_sourcemap[info.source]
+ if (remap and remap[info.currentline]) then
+ info["short-src"] = remap["short-src"]
+ info.currentline = remap[info.currentline]
+ 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 no()
+ return nil
+ 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)
+ local function q(x)
+ return do_quote(x, scope, parent, runtime)
+ end
+ if utils["is-varg"](form) then
+ assert_compile(not runtime, "quoted ... may only be used at compile time", form)
+ return "_VARARG"
+ elseif utils["is-sym"](form) then
+ local filename = nil
+ if form.filename then
+ filename = ("%q"):format(form.filename)
+ else
+ filename = "nil"
+ end
+ local symstr = utils.deref(form)
+ assert_compile(not runtime, "symbols may only be used at compile time", form)
+ if (symstr:find("#$") or symstr:find("#[:.]")) then
+ return ("sym('%s', nil, {filename=%s, line=%s})"):format(autogensym(symstr, scope), filename, (form.line or "nil"))
+ else
+ return ("sym('%s', nil, {quoted=true, filename=%s, line=%s})"):format(symstr, filename, (form.line or "nil"))
+ end
+ elseif (utils["is-list"](form) and utils["is-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["is-list"](form) then
+ local mapped = utils.kvmap(form, entry_transform(no, q))
+ local filename = nil
+ if form.filename then
+ filename = ("%q"):format(form.filename)
+ else
+ filename = "nil"
+ end
+ assert_compile(not runtime, "lists may only be used at compile time", form)
+ return (("setmetatable({filename=%s, line=%s, bytestart=%s, %s}" .. ", getmetatable(list()))")):format(filename, (form.line or "nil"), (form.bytestart or "nil"), mixed_concat(mapped, ", "))
+ 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 = ("%q"):format(source.filename)
+ else
+ filename = "nil"
+ end
+ local function _1_()
+ if source then
+ return source.line
+ else
+ return "nil"
+ end
+ end
+ return ("setmetatable({%s}, {filename=%s, line=%s})"):format(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)
+ if (m and m.line and m) then
+ return m
+ else
+ return ast
+ end
+ 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 not to return a coroutine or userdata"}, ["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 = (_G.unpack or table.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_source(source, line)
+ local lines, bytes, codeline = 0, 0
+ for this_line, newline in string.gmatch((source .. "\n"), "(.-)(\13?\n)") do
+ lines = (lines + 1)
+ if (lines == line) then
+ codeline = this_line
+ break
+ end
+ bytes = (bytes + #newline + #this_line)
+ end
+ return codeline, bytes
+ end
+ local function read_line(filename, line, source)
+ if source then
+ return read_line_from_source(source, 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, eol = 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 = (_G.unpack or table.unpack)
+ local function granulate(getchunk)
+ local c = ""
+ local index = 1
+ local done = false
+ local function _0_(parser_state)
+ if not done then
+ if (index <= #c) then
+ local b = c:byte(index)
+ index = (index + 1)
+ return b
+ else
+ c = getchunk(parser_state)
+ if (not c or (c == "")) then
+ done = true
+ return nil
+ end
+ index = 2
+ return c:byte(1)
+ end
+ end
+ end
+ local function _1_()
+ c = ""
+ return nil
+ end
+ return _0_, _1_
+ end
+ local function string_stream(str)
+ local str0 = str:gsub("^#![^\n]*\n", "")
+ 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 iswhitespace(b)
+ return ((b == 32) or ((b >= 9) and (b <= 13)))
+ end
+ local function issymbolchar(b)
+ return ((b > 32) and not delims[b] and (b ~= 127) and (b ~= 34) and (b ~= 39) and (b ~= 126) and (b ~= 59) and (b ~= 44) and (b ~= 64) and (b ~= 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
+ local function parse_error(msg)
+ local _0_ = (utils.root.options or {})
+ local source = _0_["source"]
+ local unfriendly = _0_["unfriendly"]
+ utils.root.reset()
+ if unfriendly then
+ return error(("Parse error in %s:%s: %s"):format((filename or "unknown"), (line or "?"), msg), 0)
+ else
+ return friend["parse-error"](msg, (filename or "unknown"), (line or "?"), byteindex, source)
+ end
+ end
+ local function parse_stream()
+ local whitespace_since_dispatch, done, retval = true
+ local function dispatch(v)
+ if (#stack == 0) then
+ retval = v
+ done = true
+ whitespace_since_dispatch = false
+ return nil
+ elseif stack[#stack].prefix then
+ local stacktop = stack[#stack]
+ stack[#stack] = nil
+ return dispatch(utils.list(utils.sym(stacktop.prefix), v))
+ else
+ whitespace_since_dispatch = false
+ return table.insert(stack[#stack], v)
+ end
+ end
+ local function badend()
+ local accum = utils.map(stack, "closer")
+ return parse_error(("expected closing delimiter%s %s"):format((((#stack == 1) and "") or "s"), string.char(unpack(accum))))
+ end
+ while true do
+ local b = nil
+ while true do
+ b = getb()
+ if (b and iswhitespace(b)) then
+ whitespace_since_dispatch = true
+ end
+ if (not b or not iswhitespace(b)) then
+ break
+ end
+ end
+ if not b then
+ if (#stack > 0) then
+ badend()
+ end
+ return nil
+ end
+ if (b == 59) then
+ while true do
+ b = getb()
+ if (not b or (b == 10)) then
+ break
+ end
+ end
+ elseif (type(delims[b]) == "number") then
+ if not whitespace_since_dispatch then
+ parse_error(("expected whitespace before opening delimiter " .. string.char(b)))
+ end
+ table.insert(stack, setmetatable({bytestart = byteindex, closer = delims[b], filename = filename, line = line}, getmetatable(utils.list())))
+ elseif delims[b] then
+ if (#stack == 0) then
+ parse_error(("unexpected closing delimiter " .. string.char(b)))
+ end
+ local last = stack[#stack]
+ local val = nil
+ if (last.closer ~= b) then
+ parse_error(("mismatched closing delimiter " .. string.char(b) .. ", expected " .. string.char(last.closer)))
+ end
+ last.byteend = byteindex
+ if (b == 41) then
+ val = last
+ elseif (b == 93) then
+ val = utils.sequence(unpack(last))
+ for k, v in pairs(last) do
+ getmetatable(val)[k] = v
+ end
+ else
+ if ((#last % 2) ~= 0) then
+ byteindex = (byteindex - 1)
+ parse_error("expected even number of values in table literal")
+ end
+ val = {}
+ setmetatable(val, last)
+ for i = 1, #last, 2 do
+ if ((tostring(last[i]) == ":") and utils["is-sym"](last[(i + 1)]) and utils["is-sym"](last[i])) then
+ last[i] = tostring(last[(i + 1)])
+ end
+ val[last[i]] = last[(i + 1)]
+ end
+ end
+ stack[#stack] = nil
+ dispatch(val)
+ elseif (b == 34) then
+ local state = "base"
+ local chars = {34}
+ stack[(#stack + 1)] = {closer = 34}
+ while true do
+ b = getb()
+ chars[(#chars + 1)] = b
+ if (state == "base") then
+ if (b == 92) then
+ state = "backslash"
+ elseif (b == 34) then
+ state = "done"
+ end
+ else
+ state = "base"
+ end
+ if (not b or (state == "done")) then
+ break
+ end
+ end
+ if not b then
+ badend()
+ end
+ stack[#stack] = nil
+ local raw = string.char(unpack(chars))
+ local formatted = nil
+ local function _2_(c)
+ return ("\\" .. c:byte())
+ end
+ formatted = raw:gsub("[\1-\31]", _2_)
+ local load_fn = (_G.loadstring or load)(("return %s"):format(formatted))
+ dispatch(load_fn())
+ elseif prefixes[b] then
+ table.insert(stack, {prefix = prefixes[b]})
+ local nextb = getb()
+ if iswhitespace(nextb) then
+ if (b ~= 35) then
+ parse_error("invalid whitespace after quoting prefix")
+ end
+ stack[#stack] = nil
+ dispatch(utils.sym("#"))
+ end
+ ungetb(nextb)
+ elseif (issymbolchar(b) or (b == string.byte("~"))) then
+ local chars = {}
+ local bytestart = byteindex
+ while true do
+ chars[(#chars + 1)] = b
+ b = getb()
+ if (not b or not issymbolchar(b)) then
+ break
+ end
+ end
+ if b then
+ ungetb(b)
+ end
+ local rawstr = string.char(unpack(chars))
+ if (rawstr == "true") then
+ dispatch(true)
+ elseif (rawstr == "false") then
+ dispatch(false)
+ elseif (rawstr == "...") then
+ dispatch(utils.varg())
+ elseif rawstr:match("^:.+$") then
+ dispatch(rawstr:sub(2))
+ elseif (rawstr:match("^~") and (rawstr ~= "~=")) then
+ parse_error("illegal character: ~")
+ else
+ local force_number = rawstr:match("^%d")
+ local number_with_stripped_underscores = rawstr:gsub("_", "")
+ local x = nil
+ if force_number then
+ x = (tonumber(number_with_stripped_underscores) or parse_error(("could not read number \"" .. rawstr .. "\"")))
+ else
+ x = tonumber(number_with_stripped_underscores)
+ if not x then
+ if rawstr:match("%.[0-9]") then
+ byteindex = (((byteindex - #rawstr) + rawstr:find("%.[0-9]")) + 1)
+ parse_error(("can't start multisym segment " .. "with a digit: " .. rawstr))
+ elseif (rawstr:match("[%.:][%.:]") and (rawstr ~= "..") and (rawstr ~= "$...")) then
+ byteindex = ((byteindex - #rawstr) + 1 + rawstr:find("[%.:][%.:]"))
+ parse_error(("malformed multisym: " .. rawstr))
+ elseif rawstr:match(":.+[%.:]") then
+ byteindex = ((byteindex - #rawstr) + rawstr:find(":.+[%.:]"))
+ parse_error(("method must be last component " .. "of multisym: " .. rawstr))
+ else
+ x = utils.sym(rawstr, nil, {byteend = byteindex, bytestart = bytestart, filename = filename, line = line})
+ end
+ end
+ end
+ dispatch(x)
+ end
+ else
+ parse_error(("illegal character: " .. string.char(b)))
+ end
+ if done then
+ break
+ end
+ end
+ return true, retval
+ end
+ local function _0_()
+ stack = {}
+ return nil
+ end
+ return parse_stream, _0_
+ end
+ return {["string-stream"] = string_stream, granulate = granulate, parser = parser}
+end
+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_(a, b)
+ return (tostring(a) < tostring(b))
+ end
+ table.sort(keys, _0_)
+ for i, k in ipairs(keys) do
+ succ[k] = keys[(i + 1)]
+ end
+ local function stablenext(tbl, idx)
+ if (idx == nil) then
+ return keys[1], tbl[keys[1]]
+ else
+ return succ[idx], tbl[succ[idx]]
+ end
+ 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 s = f
+ local function _0_(x)
+ return x[s]
+ 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 s = f
+ local function _0_(x)
+ return x[s]
+ end
+ f0 = _0_
+ end
+ for k, x in stablepairs(t) do
+ local korv, v = f0(k, x)
+ if (korv and not v) then
+ table.insert(out0, korv)
+ end
+ if (korv and v) then
+ out0[korv] = v
+ end
+ end
+ return out0
+ end
+ local function copy(from)
+ local to = {}
+ for k, v in pairs((from or {})) do
+ to[k] = v
+ end
+ return to
+ 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_to_string(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, 1 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 SYMBOL_MT = {"SYMBOL", __fennelview = deref, __tostring = deref}
+ local EXPR_MT = {"EXPR", __tostring = deref}
+ local LIST_MT = {"LIST", __fennelview = list_to_string, __tostring = list_to_string}
+ 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(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, scope, source)
+ local s = {str, scope = scope}
+ for k, v in pairs((source 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 varg()
+ return VARARG
+ end
+ local function is_expr(x)
+ return ((type(x) == "table") and (getmetatable(x) == EXPR_MT) and x)
+ end
+ local function is_varg(x)
+ return ((x == VARARG) and x)
+ end
+ local function is_list(x)
+ return ((type(x) == "table") and (getmetatable(x) == LIST_MT) and x)
+ end
+ local function is_sym(x)
+ return ((type(x) == "table") and (getmetatable(x) == SYMBOL_MT) and x)
+ end
+ local function is_table(x)
+ return ((type(x) == "table") and (x ~= VARARG) and (getmetatable(x) ~= LIST_MT) and (getmetatable(x) ~= SYMBOL_MT) and x)
+ end
+ local function is_sequence(x)
+ local mt = ((type(x) == "table") and getmetatable(x))
+ return (mt and (mt.sequence == SEQUENCE_MARKER) and x)
+ end
+ local function is_multi_sym(str)
+ if is_sym(str) then
+ return is_multi_sym(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 is_quoted(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"}
+ for i, v in ipairs(lua_keywords) do
+ lua_keywords[v] = i
+ end
+ local function is_valid_lua_identifier(str)
+ return (str:match("^[%a_][%w_]*$") and not lua_keywords[str])
+ end
+ local propagated_options = {"allowedGlobals", "indent", "correlate", "useMetadata", "env"}
+ 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(new_root)
+ root.reset = function()
+ root.chunk, root.scope, root.options, root.reset = new_root.chunk, new_root.scope, new_root.options, new_root.reset
+ return nil
+ end
+ return root.reset
+ end
+ local _3_
+ do
+ local _2_0 = {"./?.fnl", "./?/init.fnl"}
+ table.insert(_2_0, getenv("FENNEL_PATH"))
+ _3_ = _2_0
+ end
+ return {["debug-on"] = debug_on, ["is-expr"] = is_expr, ["is-list"] = is_list, ["is-multi-sym"] = is_multi_sym, ["is-quoted"] = is_quoted, ["is-sequence"] = is_sequence, ["is-sym"] = is_sym, ["is-table"] = is_table, ["is-valid-lua-identifier"] = is_valid_lua_identifier, ["is-varg"] = is_varg, ["lua-keywords"] = lua_keywords, ["propagate-options"] = propagate_options, ["walk-tree"] = walk_tree, allpairs = allpairs, copy = copy, deref = deref, expr = expr, kvmap = kvmap, list = list, map = map, path = table.concat(_3_, ";"), root = root, sequence = sequence, stablepairs = stablepairs, sym = sym, varg = varg}
+end
+package.preload["fennel"] = package.preload["fennel"] or function(...)
+ local 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 function eval(str, options, ...)
+ local opts = utils.copy(options)
+ local _ = nil
+ if ((opts.allowedGlobals == nil) and not getmetatable(opts.env)) then
+ opts.allowedGlobals = specials["current-global-names"](opts.env)
+ _ = nil
+ else
+ _ = nil
+ end
+ local env = (opts.env and specials["wrap-env"](opts.env))
+ local lua_source = compiler["compile-string"](str, opts)
+ local loader = nil
+ local function _1_(...)
+ if opts.filename then
+ return ("@" .. opts.filename)
+ else
+ return str
+ end
+ end
+ loader = specials["load-code"](lua_source, env, _1_(...))
+ 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 = f:read("*all")
+ f:close()
+ opts.filename = filename
+ return eval(source, opts, ...)
+ end
+ local mod = {["compile-stream"] = compiler["compile-stream"], ["compile-string"] = compiler["compile-string"], ["load-code"] = specials["load-code"], ["macro-loaded"] = specials["macro-loaded"], ["make-searcher"] = specials["make-searcher"], ["search-module"] = specials["search-module"], ["string-stream"] = parser["string-stream"], 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"](), stringStream = parser["string-stream"], sym = utils.sym, traceback = compiler.traceback, unmangle = compiler["global-unmangling"], varg = utils.varg, version = "0.5.0"}
+ utils["fennel-module"] = mod
+ do
+ local builtin_macros = [===[;; The code for these macros is somewhat idiosyncratic because it cannot use any
+ ;; macros which have not yet been defined.
+
+ (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 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 (# 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 partial [f ...]
+ "Returns a function with all arguments partially applied to f."
+ (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.")
+ (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")
+ (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 (> (# 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? (< (# args) arity-check-position)]
+ (fn check! [a]
+ (if (table? a)
+ (each [_ a (pairs a)]
+ (check! a))
+ (and (not (: (tostring a) :match "^?"))
+ (not= (tostring a) "&")
+ (not= (tostring a) "..."))
+ (table.insert args arity-check-position
+ `(assert (not= nil ,a)
+ (: "Missing argument %s on %s:%s"
+ :format ,(tostring a)
+ ,(or a.filename "unknown")
+ ,(or a.line "?"))))))
+ (assert (= :table (type arglist)) "expected arg list")
+ (each [_ a (ipairs arglist)]
+ (check! a))
+ (if empty-body?
+ (table.insert args (sym :nil)))
+ `(fn ,(unpack args))))
+
+ (fn macro [name ...]
+ "Define a single macro."
+ (assert (sym? name) "expected symbol for macro name")
+ (local args [...])
+ `(macros { ,(tostring name) (fn ,name ,(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 [(ok view) (pcall require :fennelview)
+ handle (if return? `do `print)]
+ `(,handle ,((if ok view tostring) (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]
+ (local (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.
+ (local scope (get-scope))
+ (local subscope (fennel.scope scope))
+ (fennel.compile-string (string.format "(require-macros %q)"
+ modname)
+ {:scope subscope})
+ (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 " modname))
+ (tset scope.macros import-key (. subscope.macros macro-name)))))
+ nil)
+
+ ;;; Pattern matching
+
+ (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) "_")]
+ (if (not wildcard?) (tset unifications (tostring pattern) val))
+ (values (if (or wildcard? (: (tostring pattern) :find "^?"))
+ true `(not= ,(sym :nil) ,val))
+ [pattern val]))
+ ;; guard clause
+ (and (list? pattern) (sym? (. pattern 2)) (= :? (tostring (. pattern 2))))
+ (let [(pcondition bindings) (match-pattern vals (. pattern 1)
+ unifications)
+ condition `(and ,pcondition)]
+ (for [i 3 (# pattern)] ; splice in guard clauses
+ (table.insert condition (. pattern i)))
+ (values `(let ,bindings ,condition) bindings))
+
+ ;; multi-valued patterns (represented as lists)
+ (list? 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))
+ ;; table patterns
+ (= (type pattern) :table)
+ (let [condition `(and (= (type ,val) :table))
+ bindings []]
+ (each [k pat (pairs pattern)]
+ (if (and (sym? pat) (= "&" (tostring pat)))
+ (do (assert (not (. pattern (+ k 2)))
+ "expected rest argument before last parameter")
+ (table.insert bindings (. pattern (+ k 1)))
+ (table.insert bindings [`(select ,k ((or _G.unpack
+ table.unpack)
+ ,val))]))
+ (and (= :number (type k))
+ (= "&" (tostring (. pattern (- k 1)))))
+ nil ; don't process the pattern right after &; already got it
+ (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))
+ ;; 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 ...]
+ "Perform pattern matching on val. See reference for details."
+ (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))))
+
+ {: -> : ->> : -?> : -?>>
+ : doto : when : with-open
+ : partial : lambda
+ : pick-args : pick-values
+ : macro : macrodebug : import-macros
+ : match}
+ ]===]
+ local module_name = "fennel.macros"
+ local _ = nil
+ local function _0_()
+ return mod
+ end
+ package.preload[module_name] = _0_
+ _ = nil
+ local env = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
+ 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
+end
+fennel = require("fennel")
+local unpack = (_G.unpack or table.unpack)
+local help = "\nUsage: fennel [FLAG] [FILE]\n\nRun fennel, a lisp programming language for the Lua runtime.\n\n --repl : Command to launch an interactive repl session\n --compile FILES : Command to compile files and write Lua to stdout\n --eval SOURCE (-e) : Command to evaluate source code and print the result\n\n --no-searcher : Skip installing package.searchers entry\n --indent VAL : Indent compiler output with VAL\n --add-package-path PATH : Add PATH to package.path for finding Lua modules\n --add-fennel-path PATH : Add PATH to fennel.path for finding Fennel modules\n --globals G1[,G2...] : Allow these globals in addition to standard ones\n --globals-only G1[,G2] : Same as above, but exclude standard ones\n --require-as-include : Inline required modules in the output\n --metadata : Enable function metadata, even in compiled output\n --no-metadata : Disable function metadata, even in REPL\n --correlate : Make Lua output line numbers match Fennel input\n --load FILE (-l) : Load the specified FILE before executing the command\n --no-fennelrc : Skip loading ~/.fennelrc when launching repl\n --compile-binary FILE\n OUT LUA_LIB LUA_DIR : Compile FILE to standalone binary OUT (experimental)\n --compile-binary --help : Display further help for compiling binaries\n\n --help (-h) : Display this text\n --version (-v) : Show version\n\n Metadata is typically considered a development feature and is not recommended\n for production. It is used for docstrings and enabled by default in the REPL.\n\n When not given a command, runs the file given as the first argument.\n When given neither command nor file, launches a repl.\n\n If ~/.fennelrc exists, loads it before launching a repl."
local options = {}
-
-local function dosafe(filename, opts, args)
- local ok, val = xpcall(function()
- return fennel.dofile(filename, opts, unpack(args))
- end, fennel.traceback)
- if not ok then
- io.stderr:write(val .. "\n")
- os.exit(1)
+local function dosafely(f, ...)
+ local args = {...}
+ local ok, val = nil, nil
+ local function _0_()
+ return f(unpack(args))
+ end
+ ok, val = xpcall(_0_, fennel.traceback)
+ if not ok then
+ do end (io.stderr):write((val .. "\n"))
+ os.exit(1)
+ end
+ return val
+end
+local function allow_globals(global_names)
+ options.allowedGlobals = {}
+ for g in global_names:gmatch("([^,]+),?") do
+ table.insert(options.allowedGlobals, g)
+ end
+ return nil
+end
+local function handle_load(i)
+ local file = table.remove(arg, (i + 1))
+ dosafely(fennel.dofile, file, options)
+ return table.remove(arg, i)
+end
+for i = #arg, 1, -1 do
+ local _0_0 = arg[i]
+ if (_0_0 == "--no-searcher") then
+ options.no_searcher = true
+ table.remove(arg, i)
+ elseif (_0_0 == "--indent") then
+ options.indent = table.remove(arg, (i + 1))
+ if (options.indent == "false") then
+ options.indent = false
end
- return val
+ table.remove(arg, i)
+ elseif (_0_0 == "--add-package-path") then
+ local entry = table.remove(arg, (i + 1))
+ package.path = (entry .. ";" .. package.path)
+ table.remove(arg, i)
+ elseif (_0_0 == "--add-fennel-path") then
+ local entry = table.remove(arg, (i + 1))
+ fennel.path = (entry .. ";" .. fennel.path)
+ table.remove(arg, i)
+ elseif (_0_0 == "--load") then
+ handle_load(i)
+ elseif (_0_0 == "-l") then
+ handle_load(i)
+ elseif (_0_0 == "--no-fennelrc") then
+ options.fennelrc = false
+ table.remove(arg, i)
+ elseif (_0_0 == "--correlate") then
+ options.correlate = true
+ table.remove(arg, i)
+ elseif (_0_0 == "--check-unused-locals") then
+ options.checkUnusedLocals = true
+ table.remove(arg, i)
+ elseif (_0_0 == "--globals") then
+ allow_globals(table.remove(arg, (i + 1)))
+ for global_name in pairs(_G) do
+ table.insert(options.allowedGlobals, global_name)
+ end
+ table.remove(arg, i)
+ elseif (_0_0 == "--globals-only") then
+ allow_globals(table.remove(arg, (i + 1)))
+ table.remove(arg, i)
+ elseif (_0_0 == "--require-as-include") then
+ options.requireAsInclude = true
+ table.remove(arg, i)
+ elseif (_0_0 == "--metadata") then
+ options.useMetadata = true
+ table.remove(arg, i)
+ elseif (_0_0 == "--no-metadata") then
+ options.useMetadata = false
+ table.remove(arg, i)
+ end
end
-
-local function allowGlobals(globalNames)
- options.allowedGlobals = {}
- for g in globalNames:gmatch("([^,]+),?") do
- table.insert(options.allowedGlobals, g)
- end
-end
-
-for i=#arg, 1, -1 do
- if arg[i] == "--no-searcher" then
- options.no_searcher = true
- table.remove(arg, i)
- elseif arg[i] == "--indent" then
- options.indent = table.remove(arg, i+1)
- if options.indent == "false" then options.indent = false end
- table.remove(arg, i)
- elseif arg[i] == "--add-package-path" then
- local entry = table.remove(arg, i+1)
- package.path = entry .. ";" .. package.path
- table.remove(arg, i)
- elseif arg[i] == "--add-fennel-path" then
- local entry = table.remove(arg, i+1)
- fennel.path = entry .. ";" .. fennel.path
- table.remove(arg, i)
- elseif arg[i] == "--correlate" then
- options.correlate = true
- table.remove(arg, i)
- elseif arg[i] == "--globals" then
- allowGlobals(table.remove(arg, i+1))
- for globalName in pairs(_G) do
- table.insert(options.allowedGlobals, globalName)
- end
- table.remove(arg, i)
- elseif arg[i] == "--globals-only" then
- allowGlobals(table.remove(arg, i+1))
- table.remove(arg, i)
- elseif arg[i] == "--require-as-include" then
- options.requireAsInclude = true
- table.remove(arg, i)
- elseif arg[i] == "--metadata" then
- options.useMetadata = true
- table.remove(arg, i)
- elseif arg[i] == "--no-metadata" then
- options.useMetadata = false
- table.remove(arg, i)
- end
-end
-
if not options.no_searcher then
- local opts = {}
- for k,v in pairs(options) do opts[k] = v end
- table.insert((package.loaders or package.searchers), fennel.make_searcher(opts))
+ local opts = {}
+ for k, v in pairs(options) do
+ opts[k] = v
+ end
+ table.insert((package.loaders or package.searchers), fennel["make-searcher"](opts))
+end
+local function try_readline(ok, readline)
+ if ok then
+ if readline.set_readline_name then
+ readline.set_readline_name("fennel")
+ end
+ readline.set_options({histfile = "", keeplines = 1000})
+ options.readChunk = function(parser_state)
+ local prompt = nil
+ if (0 < parser_state["stack-size"]) then
+ prompt = ".. "
+ else
+ prompt = ">> "
+ end
+ local str = readline.readline(prompt)
+ if str then
+ return (str .. "\n")
+ end
+ end
+ local completer = nil
+ options.registerCompleter = function(repl_completer)
+ completer = repl_completer
+ return nil
+ end
+ local function repl_completer(text, from, to)
+ if completer then
+ readline.set_completion_append_character("")
+ return completer(text:sub(from, to))
+ else
+ return {}
+ end
+ end
+ readline.set_complete_function(repl_completer)
+ return readline
+ end
+end
+local function load_initfile()
+ local home = (os.getenv("HOME") or "/")
+ local xdg_config_home = (os.getenv("XDG_CONFIG_HOME") or (home .. "/.config"))
+ local xdg_initfile = (xdg_config_home .. "/fennel/fennelrc")
+ local home_initfile = (home .. "/.fennelrc")
+ local init = io.open(xdg_initfile, "rb")
+ local init_filename = nil
+ if init then
+ init_filename = xdg_initfile
+ else
+ init_filename = home_initfile
+ end
+ local init0 = (init or io.open(home_initfile, "rb"))
+ if init0 then
+ init0:close()
+ return dosafely(fennel.dofile, init_filename, options, options, fennel)
+ end
+end
+local function repl()
+ local readline = try_readline(pcall(require, "readline"))
+ options.pp = require("fennelview")
+ if (false ~= options.fennelrc) then
+ load_initfile()
+ end
+ print(("Welcome to Fennel " .. fennel.version .. " on " .. _VERSION .. "!"))
+ if (options.useMetadata ~= false) then
+ print("Use (doc something) to view documentation.")
+ end
+ if not readline then
+ print("Try installing readline via luarocks for a better repl experience.")
+ end
+ fennel.repl(options)
+ if readline then
+ return readline.save_history()
+ end
end
-
--- Try to load readline library
-local function tryReadline(opts)
- local ok, readline = pcall(require, "readline")
+local function eval(form)
+ local _1_
+ if (form == "-") then
+ _1_ = (io.stdin):read("*a")
+ else
+ _1_ = form
+ end
+ return print(dosafely(fennel.eval, _1_, options))
+end
+local _1_0, _2_0, _3_0 = arg
+local _4_
+do
+ _4_ = ((type(_1_0) == "table") and (0 == #arg))
+end
+if _4_ then
+ return repl()
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--repl")) then
+ return repl()
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--compile")) then
+ local files = {select(2, (_G.unpack or table.unpack)(_1_0))}
+ for _, filename in ipairs(files) do
+ options.filename = filename
+ local f = nil
+ if (filename == "-") then
+ f = io.stdin
+ else
+ f = assert(io.open(filename, "rb"))
+ end
+ local ok, val = nil, nil
+ local function _6_()
+ return fennel["compile-string"](f:read("*a"), options)
+ end
+ ok, val = xpcall(_6_, fennel.traceback)
if ok then
- readline.set_options({
- keeplines = 1000
- })
- function opts.readChunk(parserState)
- local prompt = parserState.stackSize > 0 and '.. ' or '>> '
- local str = readline.readline(prompt)
- if str then
- return str .. "\n"
- end
- end
-
- -- completer is registered by the repl, until then returns empty list
- local completer
- function opts.registerCompleter(replCompleter)
- completer = replCompleter
- end
- local function replCompleter(text, from, to)
- if completer then return completer(text:sub(from, to)) else return {} end
- end
- readline.set_complete_function(replCompleter)
- end
-end
-
-if arg[1] == "--repl" or #arg == 0 then
- local ppok, pp = pcall(fennel.dofile, fennel_dir .. "fennelview.fnl", options)
- if ppok then
- options.pp = pp
- else
- ppok, pp = pcall(require, "fennelview")
- if ppok then
- options.pp = pp
- end
- end
- local initFilename = (os.getenv("HOME") or "") .. "/.fennelrc"
- local init = io.open(initFilename, "rb")
-
- tryReadline(options)
-
- if init then
- init:close()
- -- pass in options so fennerlrc can make changes to it
- dosafe(initFilename, options, options)
- end
- print("Welcome to Fennel " .. fennel.version .. "!")
- if options.useMetadata ~= false then
- print("Use (doc something) to view documentation.")
- end
- fennel.repl(options)
-elseif arg[1] == "--compile" then
- for i = 2, #arg do
- local f = arg[i] == "-" and io.stdin or assert(io.open(arg[i], "rb"))
- options.filename=arg[i]
- local ok, val = xpcall(function()
- return fennel.compileString(f:read("*all"), options)
- end, fennel.traceback)
- if ok then
- print(val)
- else
- io.stderr:write(val .. "\n")
- os.exit(1)
- end
- f:close()
+ print(val)
+ else
+ do end (io.stderr):write((val .. "\n"))
+ os.exit(1)
end
-elseif arg[1] == "--eval" or arg[1] == "-e" then
- if arg[2] and arg[2] ~= "-" then
- print(fennel.eval(arg[2], options))
- else
- local source = io.stdin:read("*a")
- print(fennel.eval(source, options))
- end
-elseif arg[1] == "--version" or arg[1] == "-v" then
- print("Fennel " .. fennel.version)
-elseif #arg >= 1 and arg[1] ~= "--help" and arg[1] ~= "-h" then
- local filename = table.remove(arg, 1) -- let the script have remaining args
- if filename == "-" then
- local source = io.stdin:read("*a")
- fennel.eval(source, options)
- else
- dosafe(filename, options, arg)
- end
-else
- print(help)
+ f:close()
+ end
+ return nil
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--compile-binary") and (nil ~= _1_0[2]) and (nil ~= _1_0[3]) and (nil ~= _1_0[4]) and (nil ~= _1_0[5])) then
+ local filename = _1_0[2]
+ local out = _1_0[3]
+ local static_lua = _1_0[4]
+ local lua_include_dir = _1_0[5]
+ local args = {select(6, (_G.unpack or table.unpack)(_1_0))}
+ local bin = require("fennel.binary")
+ options.filename = filename
+ options.requireAsInclude = true
+ return bin.compile(filename, out, static_lua, lua_include_dir, options, args)
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--compile-binary")) then
+ return print(require("fennel.binary").help)
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--eval") and (nil ~= _1_0[2])) then
+ local form = _1_0[2]
+ return eval(form)
+elseif ((type(_1_0) == "table") and (_1_0[1] == "-e") and (nil ~= _1_0[2])) then
+ local form = _1_0[2]
+ return eval(form)
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--version")) then
+ return print(("Fennel " .. fennel.version .. " on " .. _VERSION))
+elseif ((type(_1_0) == "table") and (_1_0[1] == "--help")) then
+ return print(help)
+elseif ((type(_1_0) == "table") and (_1_0[1] == "-h")) then
+ return print(help)
+elseif ((type(_1_0) == "table") and (_1_0[1] == "-")) then
+ local args = {select(2, (_G.unpack or table.unpack)(_1_0))}
+ return dosafely(fennel.eval, (io.stdin):read("*a"))
+elseif ((type(_1_0) == "table") and (nil ~= _1_0[1])) then
+ local filename = _1_0[1]
+ local args = {select(2, (_G.unpack or table.unpack)(_1_0))}
+ arg[-2] = arg[-1]
+ arg[-1] = arg[0]
+ arg[0] = table.remove(arg, 1)
+ return dosafely(fennel.dofile, filename, options, unpack(args))
end
@@ 1,2749 1,2892 @@
---[[
-Copyright (c) 2016-2019 Calvin Rose and contributors
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-]]
-
--- Make global variables local.
-local setmetatable = setmetatable
-local getmetatable = getmetatable
-local type = type
-local assert = assert
-local pairs = pairs
-local ipairs = ipairs
-local tostring = tostring
-local unpack = unpack or table.unpack
-
---
--- Main Types and support functions
---
-
-local function deref(self) return self[1] end
-
-local SYMBOL_MT = { 'SYMBOL', __tostring = deref }
-local EXPR_MT = { 'EXPR', __tostring = deref }
-local VARARG = setmetatable({ '...' }, { 'VARARG', __tostring = deref })
-local LIST_MT = { 'LIST',
- __tostring = function (self)
- local strs = {}
- for _, s in ipairs(self) do
- table.insert(strs, tostring(s))
- end
- return '(' .. table.concat(strs, ' ', 1, #self) .. ')'
- end
-}
-local SEQUENCE_MT = { 'SEQUENCE' }
-
--- Load code with an environment in all recent Lua versions
-local function loadCode(code, environment, filename)
- environment = environment or _ENV or _G
- if setfenv and loadstring then
- local f = assert(loadstring(code, filename))
- setfenv(f, environment)
- return f
+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(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 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 = utils["wrap-env"](options.env)
else
- return assert(load(code, filename, "t", environment))
+ env = setmetatable({}, {__index = (_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)
+ chars[(#chars + 1)] = 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
-end
-
--- Create a new list
-local function list(...)
- return setmetatable({...}, LIST_MT)
-end
-
--- Create a new symbol
-local function sym(str, scope, meta)
- local s = {str, scope = scope}
- if meta then
- for k, v in pairs(meta) do
- if type(k) == 'string' then s[k] = v 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((_G.unpack or table.unpack)(chars))
+ utils.root.options = opts
+ if not ok then
+ on_error("Parse", parse_ok_3f)
+ clear_stream()
+ reset()
+ return loop()
+ 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 source = _5_0
+ local source0 = nil
+ if save_locals_3f then
+ source0 = splice_save_locals(env, source)
+ else
+ source0 = source
+ end
+ local lua_ok_3f, loader = pcall(specials["load-code"], source0, env)
+ if not lua_ok_3f then
+ clear_stream()
+ on_error("Lua Compile", loader, source0)
+ else
+ local _7_0, _8_0 = nil, nil
+ local function _9_()
+ return {loader()}
+ end
+ local function _10_(...)
+ return on_error("Runtime", ...)
+ end
+ _7_0, _8_0 = xpcall(_9_, _10_)
+ if ((_7_0 == true) and (nil ~= _8_0)) then
+ local ret = _8_0
+ env._ = ret[1]
+ env.__ = ret
+ on_values(utils.map(ret, pp))
+ end
+ end
+ end
+ end
+ utils.root.options = old_root_options
+ return loop()
end
+ end
end
- return setmetatable(s, SYMBOL_MT)
-end
-
--- Create a new sequence
-local function sequence(...)
- return setmetatable({...}, SEQUENCE_MT)
-end
-
--- Create a new expr
--- etype should be one of
--- "literal", -- literals like numbers, strings, nil, true, false
--- "expression", -- Complex strings of Lua code, may have side effects, etc, but is an expression
--- "statement", -- Same as expression, but is also a valid statement (function calls).
--- "vargs", -- varargs symbol
--- "sym", -- symbol reference
-local function expr(strcode, etype)
- return setmetatable({ strcode, type = etype }, EXPR_MT)
-end
-
-local function varg()
- return VARARG
-end
-
-local function isVarg(x)
- return x == VARARG and x
-end
-
--- Checks if an object is a List. Returns the object if is a List.
-local function isList(x)
- return type(x) == 'table' and getmetatable(x) == LIST_MT and x
-end
-
--- Checks if an object is a symbol. Returns the object if it is a symbol.
-local function isSym(x)
- return type(x) == 'table' and getmetatable(x) == SYMBOL_MT and x
-end
-
--- Checks if an object any kind of table, EXCEPT list or symbol
-local function isTable(x)
- return type(x) == 'table' and
- x ~= VARARG and
- getmetatable(x) ~= LIST_MT and getmetatable(x) ~= SYMBOL_MT and x
-end
-
--- Checks if an object is a sequence (created with a [] literal)
-local function isSequence(x)
- return type(x) == 'table' and getmetatable(x) == SEQUENCE_MT and x
-end
-
---
--- Parser
---
-
--- Convert a stream of chunks to a stream of bytes.
--- Also returns a second function to clear the buffer in the byte stream
-local function granulate(getchunk)
- local c = ''
- local index = 1
- local done = false
- return function (parserState)
- if done then return nil end
- if index <= #c then
- local b = c:byte(index)
- index = index + 1
- return b
+ return loop()
+ end
+ return repl
+end
+package.preload["fennel.specials"] = package.preload["fennel.specials"] or function(...)
+ local utils = require("fennel.utils")
+ local parser = require("fennel.parser")
+ local compiler = require("fennel.compiler")
+ local unpack = (_G.unpack or table.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
- c = getchunk(parserState)
- if not c or c == '' then
- done = true
- return nil
- end
- index = 2
- return c:byte(1)
+ _3_ = k
end
- end, function ()
- c = ''
+ 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 _ENV) or _G)
+ if (_G.setfenv and _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
-
--- Convert a string into a stream of bytes
-local function stringStream(str)
- local index = 1
- return function()
- local r = str:byte(index)
- index = index + 1
- return r
+ end
+ local function doc_2a(tgt, name)
+ if not tgt then
+ return (name .. " not found")
+ else
+ local docstring = (((compiler.metadata):get(tgt, "fnl/docstring") or "#<undocumented>")):gsub("\n$", ""):gsub("\n", "\n ")
+ if (type(tgt) == "function") then
+ local arglist = table.concat(((compiler.metadata):get(tgt, "fnl/arglist") or {"#<unknown-arguments>"}), " ")
+ local _0_
+ if (#arglist > 0) then
+ _0_ = " "
+ else
+ _0_ = ""
+ end
+ return string.format("(%s%s%s)\n %s", name, _0_, arglist, docstring)
+ else
+ return string.format("%s\n %s", name, docstring)
+ end
end
-end
-
--- Table of delimiter bytes - (, ), [, ], {, }
--- Opener keys have closer as the value, and closers keys
--- have true as their value.
-local delims = {
- [40] = 41, -- (
- [41] = true, -- )
- [91] = 93, -- [
- [93] = true, -- ]
- [123] = 125, -- {
- [125] = true -- }
-}
-
-local function iswhitespace(b)
- return b == 32 or (b >= 9 and b <= 13)
-end
-
-local function issymbolchar(b)
- return b > 32 and
- not delims[b] and
- b ~= 127 and -- "<BS>"
- b ~= 34 and -- "\""
- b ~= 39 and -- "'"
- b ~= 126 and -- "~"
- b ~= 59 and -- ";"
- b ~= 44 and -- ","
- b ~= 64 and -- "@"
- b ~= 96 -- "`"
-end
-
-local prefixes = { -- prefix chars substituted while reading
- [96] = 'quote', -- `
- [44] = 'unquote', -- ,
- [39] = 'quote', -- '
- [35] = 'hashfn' -- #
-}
-
--- Parse one value given a function that
--- returns sequential bytes. Will throw an error as soon
--- as possible without getting more bytes on bad input. Returns
--- if a value was read, and then the value read. Will return nil
--- when input stream is finished.
-local function parser(getbyte, filename)
-
- -- Stack of unfinished values
- local stack = {}
-
- -- Provide one character buffer and keep
- -- track of current line and byte index
- local line = 1
- local byteindex = 0
- local lastb
- local function ungetb(ub)
- if ub == 10 then line = line - 1 end
- byteindex = byteindex - 1
- lastb = ub
+ 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 outer_target = opts.target
+ local outer_tail = opts.tail
+ local retexprs = {returned = true}
+ if (not outer_target and (opts.nval ~= 0) and not outer_tail) then
+ if opts.nval then
+ local syms = {}
+ for i = 1, opts.nval, 1 do
+ local s = ((pre_syms and pre_syms[i]) or compiler.gensym(scope))
+ syms[i] = s
+ retexprs[i] = utils.expr(s, "sym")
+ end
+ outer_target = table.concat(syms, ", ")
+ compiler.emit(parent, ("local %s"):format(outer_target), ast)
+ compiler.emit(parent, "do", ast)
+ else
+ local fname = compiler.gensym(scope)
+ local fargs = ((scope.vararg and "...") or "")
+ compiler.emit(parent, ("local function %s(%s)"):format(fname, fargs), ast)
+ retexprs = utils.expr((fname .. "(" .. fargs .. ")"), "statement")
+ outer_tail = true
+ outer_target = nil
+ end
+ else
+ compiler.emit(parent, "do", ast)
end
- local function getb()
- local r
- if lastb then
- r, lastb = lastb, nil
+ 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)}
+ 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 retexprs
+ 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)})
+ exprs[(#exprs + 1)] = subexprs[1]
+ if (i == len) then
+ for j = 2, #subexprs, 1 do
+ exprs[(#exprs + 1)] = subexprs[j]
+ end
+ end
+ end
+ return exprs
+ end
+ doc_special("values", {"..."}, "Return multiple values from a function. Must be in tail position.")
+ SPECIALS.fn = function(ast, scope, parent)
+ local index, fn_name, is_local_fn, docstring = 2, utils["is-sym"](ast[2])
+ 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 multi = (fn_name and utils["is-multi-sym"](fn_name[1]))
+ compiler.assert((not multi or not multi["multi-sym-method-call"]), ("unexpected multi symbol " .. tostring(fn_name)), ast[index])
+ if (fn_name and (fn_name[1] ~= "nil")) then
+ is_local_fn = not multi
+ if is_local_fn then
+ fn_name = compiler["declare-local"](fn_name, {}, scope, ast)
+ else
+ fn_name = compiler["symbol-to-expression"](fn_name, scope)[1]
+ end
+ index = (index + 1)
+ else
+ is_local_fn = true
+ fn_name = compiler.gensym(scope)
+ end
+ do
+ local arg_list = nil
+ local function _2_()
+ if (type(ast[index]) == "table") then
+ return ast[index]
+ else
+ return ast
+ end
+ end
+ arg_list = compiler.assert(utils["is-table"](ast[index]), "expected parameters", _2_())
+ local function get_arg_name(i, name)
+ if utils["is-varg"](name) then
+ compiler.assert((i == #arg_list), "expected vararg as last parameter", ast[2])
+ f_scope.vararg = true
+ return "..."
+ elseif (utils["is-sym"](name) and (utils.deref(name) ~= "nil") and not utils["is-multi-sym"](utils.deref(name))) then
+ return compiler["declare-local"](name, {}, f_scope, ast)
+ elseif utils["is-table"](name) then
+ local raw = utils.sym(compiler.gensym(scope))
+ local declared = compiler["declare-local"](raw, {}, f_scope, ast)
+ compiler.destructure(name, raw, ast, f_scope, f_chunk, {declaration = true, nomulti = true})
+ return declared
else
- r = getbyte({ stackSize = #stack })
- end
- byteindex = byteindex + 1
- if r == 10 then line = line + 1 end
- return r
- end
- local function parseError(msg)
- return error(msg .. ' in ' .. (filename or 'unknown') .. ':' .. line, 0)
- end
-
- -- Parse stream
- return function()
-
- -- Dispatch when we complete a value
- local done, retval
- local whitespaceSinceDispatch = true
- local function dispatch(v)
- if #stack == 0 then
- retval = v
- done = true
- elseif stack[#stack].prefix then
- local stacktop = stack[#stack]
- stack[#stack] = nil
- return dispatch(list(sym(stacktop.prefix), v))
+ return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(name)), ast[2])
+ end
+ end
+ local arg_name_list = utils.kvmap(arg_list, get_arg_name)
+ if ((type(ast[(index + 1)]) == "string") and ((index + 1) < #ast)) then
+ index = (index + 1)
+ docstring = ast[index]
+ end
+ for i = (index + 1), #ast, 1 do
+ compiler.compile1(ast[i], f_scope, f_chunk, {nval = (((i ~= #ast) and 0) or nil), tail = (i == #ast)})
+ end
+ if is_local_fn then
+ compiler.emit(parent, ("local function %s(%s)"):format(fn_name, table.concat(arg_name_list, ", ")), ast)
+ else
+ compiler.emit(parent, ("%s = function(%s)"):format(fn_name, table.concat(arg_name_list, ", ")), ast)
+ end
+ compiler.emit(parent, f_chunk, ast)
+ compiler.emit(parent, "end", ast)
+ if utils.root.options.useMetadata then
+ local args = nil
+ local function _5_(v)
+ if utils["is-table"](v) then
+ return "\"#<table>\""
+ else
+ return ("\"%s\""):format(tostring(v))
+ end
+ end
+ args = utils.map(arg_list, _5_)
+ 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"))
+ compiler.emit(parent, ("pcall(function() %s:setall(%s, %s) end)"):format(meta_str, fn_name, table.concat(meta_fields, ", ")))
+ end
+ end
+ return utils.expr(fn_name, "sym")
+ 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) 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([[%s]])"):format(doc_2a(special_or_macro, target))
+ else
+ local value = tostring(compiler.compile1(ast[2], scope, parent, {nval = 1})[1])
+ return ("print(require('%s').doc(%s, '%s'))"):format((utils.root.options.moduleName or "fennel"), 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 lhs = compiler.compile1(ast[2], scope, parent, {nval = 1})
+ if (len == 2) then
+ return tostring(lhs[1])
+ else
+ local indices = {}
+ for i = 3, len, 1 do
+ local index = ast[i]
+ if ((type(index) == "string") and utils["is-valid-lua-identifier"](index)) then
+ table.insert(indices, ("." .. index))
+ else
+ index = compiler.compile1(index, scope, parent, {nval = 1})[1]
+ table.insert(indices, ("[" .. tostring(index) .. "]"))
+ end
+ end
+ if utils["is-table"](ast[2]) then
+ return ("(" .. tostring(lhs[1]) .. ")" .. table.concat(indices))
+ else
+ return (tostring(lhs[1]) .. 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})
+ 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})
+ 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})
+ 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})
+ 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})
+ 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["is-list"](bindings) or utils["is-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), 1 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})
+ 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), 1 do
+ local key = compiler.compile1(ast[i], scope, parent, {nval = 1})[1]
+ keys[(#keys + 1)] = 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 if_2a(ast, scope, parent, opts)
+ local do_scope = compiler["make-scope"](scope)
+ local branches = {}
+ local has_else = ((#ast > 3) and ((#ast % 2) == 0))
+ local else_branch = nil
+ local wrapper, inner_tail, inner_target, target_exprs = nil
+ if (opts.tail or opts.target or opts.nval) then
+ if (opts.nval and (opts.nval ~= 0) and not opts.target) then
+ local accum = {}
+ target_exprs = {}
+ for i = 1, opts.nval, 1 do
+ local s = compiler.gensym(scope)
+ accum[i] = s
+ target_exprs[i] = utils.expr(s, "sym")
+ end
+ wrapper, inner_tail, inner_target = "target", opts.tail, table.concat(accum, ", ")
+ else
+ wrapper, inner_tail, inner_target = "none", opts.tail, opts.target
+ end
+ else
+ wrapper, inner_tail, inner_target = "iife", true, nil
+ end
+ 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
+ if has_else then
+ else_branch = compile_body(#ast)
+ end
+ 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)) 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 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, 1 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, 1 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.")
+ SPECIALS.each = function(ast, scope, parent)
+ compiler.assert((#ast >= 3), "expected body expression", ast[1])
+ local binding = compiler.assert(utils["is-table"](ast[2]), "expected binding table", ast)
+ 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["is-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})
+ end
+ compiler["apply-manglings"](sub_scope, new_manglings, ast)
+ 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, 1 do
+ sub_chunk[(#sub_chunk + 1)] = 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["is-table"](ast[2]), "expected binding table", ast)
+ local binding_sym = table.remove(ast[2], 1)
+ local sub_scope = compiler["make-scope"](scope)
+ local range_args = {}
+ local chunk = {}
+ compiler.assert(utils["is-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), 1 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_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 once(val, ast, scope, parent)
+ if ((val.type == "statement") or (val.type == "expression")) then
+ local s = compiler.gensym(scope)
+ compiler.emit(parent, ("local %s = %s"):format(s, tostring(val)), ast)
+ return utils.expr(s, "sym")
+ else
+ return val
+ end
+ end
+ local function method_call(ast, scope, parent)
+ compiler.assert((#ast >= 3), "expected at least 2 arguments", ast)
+ local objectexpr = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
+ local methodident, methodstring = false
+ if ((type(ast[3]) == "string") and utils["is-valid-lua-identifier"](ast[3])) then
+ methodident = true
+ methodstring = ast[3]
+ else
+ methodstring = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1])
+ objectexpr = once(objectexpr, ast[2], scope, parent)
+ end
+ local args = {}
+ for i = 4, #ast, 1 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
+ local fstring = nil
+ if not methodident then
+ table.insert(args, 1, tostring(objectexpr))
+ if (objectexpr.type == "sym") then
+ fstring = "%s[%s](%s)"
+ else
+ fstring = "(%s)[%s](%s)"
+ end
+ elseif ((objectexpr.type == "literal") or (objectexpr.type == "expression")) then
+ fstring = "(%s):%s(%s)"
+ else
+ fstring = "%s:%s(%s)"
+ end
+ return utils.expr(fstring:format(tostring(objectexpr), methodstring, table.concat(args, ", ")), "statement")
+ 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, 1 do
+ els[(#els + 1)] = tostring(ast[i]):gsub("\n", " ")
+ end
+ return compiler.emit(parent, ("-- " .. table.concat(els, " ")), ast)
+ end
+ doc_special("comment", {"..."}, "Comment which will be emitted in Lua output.")
+ 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)
+ compiler["declare-local"](symbol, {}, scope, ast)
+ local args = {}
+ 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["is-sym"](node) and (utils.deref(node) == "$...")) then
+ parent_node[idx] = utils.varg()
+ f_scope.vararg = true
+ return nil
+ else
+ return (utils["is-list"](node) or utils["is-table"](node))
+ end
+ end
+ utils["walk-tree"](ast[2], walker)
+ compiler.compile1(ast[2], f_scope, f_chunk, {tail = true})
+ local max_used = 0
+ for i = 1, 9, 1 do
+ if f_scope.symmeta[("$" .. i)].used then
+ max_used = i
+ end
+ end
+ if f_scope.vararg then
+ compiler.assert((max_used == 0), "$ and $... in hashfn are mutually exclusive", ast)
+ args = {utils.deref(utils.varg())}
+ max_used = 1
+ end
+ local arg_str = table.concat(args, ", ", 1, max_used)
+ compiler.emit(parent, ("local function %s(%s)"):format(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 define_arithmetic_special(name, zero_arity, unary_prefix, lua_name)
+ do
+ local padded_op = (" " .. (lua_name or name) .. " ")
+ local function _0_(ast, scope, parent)
+ local len = #ast
+ if (len == 1) then
+ compiler.assert((zero_arity ~= nil), "Expected more than 0 arguments", ast)
+ return utils.expr(zero_arity, "literal")
+ else
+ local operands = {}
+ for i = 2, len, 1 do
+ local subexprs = nil
+ local _1_
+ if (i == 1) then
+ _1_ = 1
else
- table.insert(stack[#stack], v)
- end
- whitespaceSinceDispatch = false
- end
-
- -- Throw nice error when we expect more characters
- -- but reach end of stream.
- local function badend()
- local accum = {}
- for _, item in ipairs(stack) do
- accum[#accum + 1] = item.closer
+ _1_ = nil
end
- parseError(('expected closing delimiter%s %s'):format(
- #stack == 1 and "" or "s",
- string.char(unpack(accum))))
- end
-
- -- The main parse loop
- repeat
- local b
-
- -- Skip whitespace
- repeat
- b = getb()
- if b and iswhitespace(b) then
- whitespaceSinceDispatch = true
- end
- until not b or not iswhitespace(b)
- if not b then
- if #stack > 0 then badend() end
- return nil
- end
-
- if b == 59 then -- ; Comment
- repeat
- b = getb()
- until not b or b == 10 -- newline
- elseif type(delims[b]) == 'number' then -- Opening delimiter
- if not whitespaceSinceDispatch then
- parseError('expected whitespace before opening delimiter '
- .. string.char(b))
- end
- table.insert(stack, setmetatable({
- closer = delims[b],
- line = line,
- filename = filename,
- bytestart = byteindex
- }, LIST_MT))
- elseif delims[b] then -- Closing delimiter
- if #stack == 0 then parseError('unexpected closing delimiter '
- .. string.char(b)) end
- local last = stack[#stack]
- local val
- if last.closer ~= b then
- parseError('unexpected delimiter ' .. string.char(b) ..
- ', expected ' .. string.char(last.closer))
- end
- last.byteend = byteindex -- Set closing byte index
- if b == 41 then -- ; )
- val = last
- elseif b == 93 then -- ; ]
- val = sequence()
- for i = 1, #last do
- val[i] = last[i]
- end
- else -- ; }
- if #last % 2 ~= 0 then
- parseError('expected even number of values in table literal')
- end
- val = {}
- for i = 1, #last, 2 do
- if tostring(last[i]) == ":" and isSym(last[i + 1]) then
- last[i] = tostring(last[i + 1])
- end
- val[last[i]] = last[i + 1]
- end
- end
- stack[#stack] = nil
- dispatch(val)
- elseif b == 34 then -- Quoted string
- local state = "base"
- local chars = {34}
- stack[#stack + 1] = {closer = 34}
- repeat
- b = getb()
- chars[#chars + 1] = b
- if state == "base" then
- if b == 92 then
- state = "backslash"
- elseif b == 34 then
- state = "done"
- end
- else
- -- state == "backslash"
- state = "base"
- end
- until not b or (state == "done")
- if not b then badend() end
- stack[#stack] = nil
- local raw = string.char(unpack(chars))
- local formatted = raw:gsub("[\1-\31]", function (c) return '\\' .. c:byte() end)
- local loadFn = loadCode(('return %s'):format(formatted), nil, filename)
- dispatch(loadFn())
- elseif prefixes[b] then
- -- expand prefix byte into wrapping form eg. '`a' into '(quote a)'
- table.insert(stack, {
- prefix = prefixes[b]
- })
- local nextb = getb()
- if iswhitespace(nextb) then
- if b == 35 then
- stack[#stack] = nil
- dispatch(sym('#'))
- else
- parseError('invalid whitespace after quoting prefix')
- end
- end
- ungetb(nextb)
- elseif issymbolchar(b) or b == string.byte("~") then -- Try symbol
- local chars = {}
- local bytestart = byteindex
- repeat
- chars[#chars + 1] = b
- b = getb()
- until not b or not issymbolchar(b)
- if b then ungetb(b) end
- local rawstr = string.char(unpack(chars))
- if rawstr == 'true' then dispatch(true)
- elseif rawstr == 'false' then dispatch(false)
- elseif rawstr == '...' then dispatch(VARARG)
- elseif rawstr:match('^:.+$') then -- keyword style strings
- dispatch(rawstr:sub(2))
- elseif rawstr:match("^~") and rawstr ~= "~=" then
- -- for backwards-compatibility, special-case allowance of ~=
- -- but all other uses of ~ are disallowed
- parseError("illegal character: ~")
- else
- local forceNumber = rawstr:match('^%d')
- local numberWithStrippedUnderscores = rawstr:gsub("_", "")
- local x
- if forceNumber then
- x = tonumber(numberWithStrippedUnderscores) or
- parseError('could not read token "' .. rawstr .. '"')
- else
- x = tonumber(numberWithStrippedUnderscores) or
- (rawstr:match("%.[0-9]") and
- parseError("can't start multisym segment " ..
- "with digit: ".. rawstr)) or
- ((rawstr:match(":%.") or
- rawstr:match("%.:") or
- rawstr:match("::") or
- (rawstr:match("%.%.") and rawstr ~= "..")) and
- parseError("malformed multisym: " .. rawstr)) or
- (rawstr:match(":.+:") and
- parseError("method call must be last component " ..
- "of multisym: " .. rawstr)) or
- sym(rawstr, nil, { line = line,
- filename = filename,
- bytestart = bytestart,
- byteend = byteindex, })
- end
- dispatch(x)
- end
+ subexprs = compiler.compile1(ast[i], scope, parent, {nval = _1_})
+ utils.map(subexprs, tostring, operands)
+ end
+ if (#operands == 1) then
+ if unary_prefix then
+ return ("(" .. unary_prefix .. padded_op .. operands[1] .. ")")
else
- parseError("illegal character: " .. string.char(b))
+ return operands[1]
end
- until done
- return true, retval
- end, function ()
- stack = {}
+ else
+ return ("(" .. table.concat(operands, padded_op) .. ")")
+ end
+ end
+ end
+ SPECIALS[name] = _0_
+ end
+ 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")
+ define_arithmetic_special("lshift", nil, "1", "<<")
+ define_arithmetic_special("rshift", nil, "1", ">>")
+ define_arithmetic_special("band", "0", "0", "&")
+ define_arithmetic_special("bor", "0", "0", "|")
+ define_arithmetic_special("bxor", "0", "0", "~")
+ doc_special("lshift", {"x", "n"}, "Bitwise logical left shift of x by n bits; only works in Lua 5.3+.")
+ doc_special("rshift", {"x", "n"}, "Bitwise logical right shift of x by n bits; only works in Lua 5.3+.")
+ doc_special("band", {"x1", "x2"}, "Bitwise AND of arguments; only works in Lua 5.3+.")
+ doc_special("bor", {"x1", "x2"}, "Bitwise OR of arguments; only works in Lua 5.3+.")
+ doc_special("bxor", {"x1", "x2"}, "Bitwise XOR of arguments; only works in Lua 5.3+.")
+ 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 define_comparator_special(name, realop, chain_op)
+ do
+ local op = (realop or name)
+ local function opfn(ast, scope, parent)
+ local len = #ast
+ compiler.assert((len > 2), "expected at least two arguments", ast)
+ local lhs = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
+ local lastval = compiler.compile1(ast[3], scope, parent, {nval = 1})[1]
+ if (len > 3) then
+ lastval = once(lastval, ast[3], scope, parent)
+ end
+ local out = ("(%s %s %s)"):format(tostring(lhs), op, tostring(lastval))
+ if (len > 3) then
+ for i = 4, len do
+ local nextval = once(compiler.compile1(ast[i], scope, parent, {nval = 1})[1], ast[i], scope, parent)
+ out = ((out .. " %s (%s %s %s)")):format((chain_op or "and"), tostring(lastval), op, tostring(nextval))
+ lastval = nextval
+ end
+ out = ("(" .. out .. ")")
+ end
+ return out
+ 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")
+ SPECIALS["~="] = SPECIALS["not="]
+ 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+.")
+ define_unary_special("length", "#")
+ doc_special("length", {"x"}, "Returns the length of a table or string.")
+ 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
-end
-
---
--- Compilation
---
-
--- Top level compilation bindings.
-local rootChunk
-local rootScope
-local rootOptions
-
--- Create a new Scope, optionally under a parent scope. Scopes are compile time constructs
--- that are responsible for keeping track of local variables, name mangling, and macros.
--- They are accessible to user code via the '*compiler' special form (may change). They
--- use metatables to implement nesting via inheritance.
-local function makeScope(parent)
- return {
- unmanglings = setmetatable({}, {
- __index = parent and parent.unmanglings
- }),
- manglings = setmetatable({}, {
- __index = parent and parent.manglings
- }),
- specials = setmetatable({}, {
- __index = parent and parent.specials
- }),
- symmeta = setmetatable({}, {
- __index = parent and parent.symmeta
- }),
- includes = setmetatable({}, {
- __index = parent and parent.includes
- }),
- autogensyms = {},
- parent = parent,
- vararg = parent and parent.vararg,
- depth = parent and ((parent.depth or 0) + 1) or 0,
- hashfn = parent and parent.hashfn
- }
-end
-
--- Assert a condition and raise a compile error with line numbers. The ast arg
--- should be unmodified so that its first element is the form being called.
-local function assertCompile(condition, msg, ast)
- -- if we use regular `assert' we can't provide the `level' argument of zero
- if not condition then
- error(string.format("Compile error in '%s' %s:%s: %s",
- isSym(ast[1]) and ast[1][1] or ast[1] or '()',
- ast.filename or "unknown", ast.line or '?', msg), 0)
+ 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 function make_compiler_env(ast, scope, parent)
+ local function _0_()
+ return compiler.scopes.macro
+ end
+ local function _1_(symbol)
+ compiler.assert(compiler.scopes.macro, "must call from macro", ast)
+ return compiler.scopes.macro.manglings[tostring(symbol)]
+ end
+ local function _2_()
+ return utils.sym(compiler.gensym((compiler.scopes.macro or scope)))
+ end
+ local function _3_(form)
+ compiler.assert(compiler.scopes.macro, "must call from macro", ast)
+ return compiler.macroexpand(form, compiler.scopes.macro)
+ end
+ return setmetatable({["get-scope"] = _0_, ["in-scope?"] = _1_, ["list?"] = utils["is-list"], ["multi-sym?"] = utils["is-multi-sym"], ["sequence?"] = utils["is-sequence"], ["sym?"] = utils["is-sym"], ["table?"] = utils["is-table"], ["varg?"] = utils["is-varg"], _AST = ast, _CHUNK = parent, _IS_COMPILER = true, _SCOPE = scope, _SPECIALS = compiler.scopes.global.specials, _VARARG = utils.varg(), fennel = utils["fennel-module"], gensym = _2_, list = utils.list, macroexpand = _3_, sequence = utils.sequence, sym = utils.sym, unpack = unpack}, {__index = (_ENV or _G)})
+ 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 _0_0 = (io.open(filename) or io.open(filename2))
+ if (nil ~= _0_0) then
+ local file = _0_0
+ file:close()
+ return filename
+ end
end
- return condition
-end
-
-local GLOBAL_SCOPE = makeScope()
-GLOBAL_SCOPE.vararg = true
-local SPECIALS = GLOBAL_SCOPE.specials
-local COMPILER_SCOPE = makeScope(GLOBAL_SCOPE)
-
-local luaKeywords = {
- 'and', 'break', 'do', 'else', 'elseif', 'end', 'false', 'for', 'function',
- 'if', 'in', 'local', 'nil', 'not', 'or', 'repeat', 'return', 'then', 'true',
- 'until', 'while'
-}
-for i, v in ipairs(luaKeywords) do
- luaKeywords[v] = i
-end
-
-local function isValidLuaIdentifier(str)
- return (str:match('^[%a_][%w_]*$') and not luaKeywords[str])
-end
-
--- Allow printing a string to Lua, also keep as 1 line.
-local serializeSubst = {
- ['\a'] = '\\a',
- ['\b'] = '\\b',
- ['\f'] = '\\f',
- ['\n'] = 'n',
- ['\t'] = '\\t',
- ['\v'] = '\\v'
-}
-local function serializeString(str)
- local s = ("%q"):format(str)
- s = s:gsub('.', serializeSubst):gsub("[\128-\255]", function(c)
- return "\\" .. c:byte()
- end)
- return s
-end
-
--- A multi symbol is a symbol that is actually composed of
--- two or more symbols using the dot syntax. The main differences
--- from normal symbols is that they cannot be declared local, and
--- they may have side effects on invocation (metatables)
-local function isMultiSym(str)
- if isSym(str) then
- return isMultiSym(tostring(str))
- end
- if type(str) ~= 'string' then return end
- local parts = {}
- for part in str:gmatch('[^%.%:]+[%.%:]?') do
- local lastChar = part:sub(-1)
- if lastChar == ":" then
- parts.multiSymMethodCall = true
- end
- if lastChar == ":" or lastChar == "." then
- parts[#parts + 1] = part:sub(1, -2)
+ local function find_in_path(start)
+ local _0_0 = fullpath:match(pattern, start)
+ if (nil ~= _0_0) then
+ local path = _0_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 opts = utils.copy(utils.root.options)
+ for k, v in pairs((options or {})) do
+ opts[k] = v
+ end
+ local function _0_(module_name)
+ local filename = search_module(module_name)
+ if filename then
+ local function _1_(mod_name)
+ return utils["fennel-module"].dofile(filename, opts, mod_name)
+ end
+ return _1_
+ end
+ end
+ return _0_
+ 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 add_macros(macros_2a, ast, scope)
+ compiler.assert(utils["is-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
+ local function load_macros(modname, ast, scope, parent)
+ local filename = compiler.assert(search_module(modname), (modname .. " module not found."), ast)
+ local env = make_compiler_env(ast, scope, parent)
+ local globals = macro_globals(env, current_global_names())
+ return utils["fennel-module"].dofile(filename, {allowedGlobals = globals, env = env, scope = compiler.scopes.compiler, useMetadata = utils.root.options.useMetadata})
+ end
+ local macro_loaded = {}
+ SPECIALS["require-macros"] = function(ast, scope, parent)
+ compiler.assert((#ast == 2), "Expected one module name argument", ast)
+ local modname = ast[2]
+ if not macro_loaded[modname] then
+ macro_loaded[modname] = load_macros(modname, ast, scope, parent)
+ 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_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 = {nval = 1, 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
- parts[#parts + 1] = part
+ return error(..., 0)
end
+ end
+ local function _0_()
+ return f:read("*all"):gsub("[\13\n]*$", "")
+ end
+ src = close_handlers_0_(xpcall(_0_, (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_fennel(src, path, opts, sub_chunk)
+ else
+ compiler.emit(sub_chunk, src, ast)
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
-
-local function isQuoted(symbol) return symbol.quoted end
-
--- Mangler for global symbols. Does not protect against collisions,
--- but makes them unlikely. This is the mangling that is exposed to
--- to the world.
-local function globalMangling(str)
- if isValidLuaIdentifier(str) then
- return str
- end
- -- Use underscore as escape character
- return '__fnl_global__' .. str:gsub('[^%w]', function (c)
- return ('_%02x'):format(c:byte())
- end)
-end
-
--- Reverse a global mangling. Takes a Lua identifier and
--- returns the fennel symbol string that created it.
-local function globalUnmangling(identifier)
- local rest = identifier:match('^__fnl_global__(.*)$')
- if rest then
- return rest:gsub('_[%da-f][%da-f]', function (code)
- return string.char(tonumber(code:sub(2), 16))
- 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 _1_()
+ local _0_0 = search_module(mod)
+ if (nil ~= _0_0) then
+ local fennel_path = _0_0
+ return include_path(ast, opts, fennel_path, mod, true)
+ else
+ local _ = _0_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 _1_())
+ 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 scope0 = compiler["make-scope"](compiler.scopes.compiler)
+ local luasrc = compiler.compile(ast, {scope = scope0, useMetadata = utils.root.options.useMetadata})
+ local loader = load_code(luasrc, wrap_env(make_compiler_env(ast, scope0, parent)))
+ return loader()
+ 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, ["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 = (_G.unpack or table.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
- return identifier
+ _0_ = 0
end
-end
-
--- Creates a symbol from a string by mangling it.
--- ensures that the generated symbol is unique
--- if the input string is unique in the scope.
-local function localMangling(str, scope, ast)
- if scope.manglings[str] then
- return scope.manglings[str]
+ 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_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
+ local m = getmetatable(ast)
+ local filename = ((m and m.filename) or ast.filename or "unknown")
+ local line = ((m and m.line) or ast.line or "?")
+ local target = nil
+ local function _1_()
+ if utils["is-sym"](ast[1]) then
+ return utils.deref(ast[1])
+ else
+ return (ast[1] or "()")
+ end
+ end
+ target = tostring(_1_())
+ error(string.format("Compile error in '%s' %s:%s: %s", target, filename, line, 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 ("%q"):format(str):gsub(".", serialize_subst):gsub("[\128-\255]", _0_)
+ end
+ local function global_mangling(str)
+ if utils["is-valid-lua-identifier"](str) then
+ return str
+ else
+ local function _0_(_241)
+ return ("_%02x"):format(_241:byte())
+ end
+ return ("__fnl_global__" .. str:gsub("[^%w]", _0_))
+ end
+ end
+ local function global_unmangling(identifier)
+ local _0_0 = identifier:match("^__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 = rest:gsub("_[%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)
+ local found_3f = not allowed_globals
+ if not allowed_globals then
+ return true
+ else
+ for _, g in ipairs(allowed_globals) do
+ if (g == name) then
+ found_3f = true
+ end
+ end
+ return found_3f
end
+ end
+ local function local_mangling(str, scope, ast, temp_manglings)
local append = 0
local mangling = str
- assertCompile(not isMultiSym(str), 'did not expect multi symbol ' .. str, ast)
-
- -- Mapping mangling to a valid Lua identifier
- if luaKeywords[mangling] or mangling:match('^%d') then
- mangling = '_' .. mangling
- end
- mangling = mangling:gsub('-', '_')
- mangling = mangling:gsub('[^%w_]', function (c)
- return ('_%02x'):format(c:byte())
- end)
-
+ assert_compile(not utils["is-multi-sym"](str), ("unexpected multi symbol " .. str), ast)
+ if (utils["lua-keywords"][mangling] or mangling:match("^%d")) then
+ mangling = ("_" .. mangling)
+ end
+ local function _1_(_241)
+ return ("_%02x"):format(_241:byte())
+ end
+ mangling = mangling:gsub("-", "_"):gsub("[^%w_]", _1_)
local raw = mangling
while scope.unmanglings[mangling] do
- mangling = raw .. append
- append = append + 1
+ mangling = (raw .. append)
+ append = (append + 1)
end
scope.unmanglings[mangling] = str
- scope.manglings[str] = mangling
+ do
+ local manglings = (temp_manglings or scope.manglings)
+ manglings[str] = mangling
+ end
return mangling
-end
-
--- Combine parts of a symbol
-local function combineParts(parts, scope)
- local ret = scope.manglings[parts[1]] or globalMangling(parts[1])
- for i = 2, #parts do
- if isValidLuaIdentifier(parts[i]) then
- if parts.multiSymMethodCall and i == #parts then
- ret = ret .. ':' .. parts[i]
- else
- ret = ret .. '.' .. parts[i]
- end
+ 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, 1 do
+ if utils["is-valid-lua-identifier"](parts[i]) then
+ if (parts["multi-sym-method-call"] and (i == #parts)) then
+ ret = (ret .. ":" .. parts[i])
else
- ret = ret .. '[' .. serializeString(parts[i]) .. ']'
+ ret = (ret .. "." .. parts[i])
end
+ else
+ ret = (ret .. "[" .. serialize_string(parts[i]) .. "]")
+ end
end
return ret
-end
-
--- Generates a unique symbol in the scope.
-local function gensym(scope, base)
- local mangling
- local append = 0
- repeat
- mangling = (base or '') .. '_' .. append .. '_'
- append = append + 1
- until not scope.unmanglings[mangling]
+ 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] = true
return mangling
-end
-
--- Generates a unique symbol in the scope based on the base name. Calling
--- repeatedly with the same base and same scope will return existing symbol
--- rather than generating new one.
-local function autogensym(base, scope)
- if scope.autogensyms[base] then return scope.autogensyms[base] end
- local mangling = gensym(scope, base)
- scope.autogensyms[base] = mangling
- return mangling
-end
-
--- Check if a binding is valid
-local function checkBindingValid(symbol, scope, ast)
- -- Check if symbol will be over shadowed by special
- local name = symbol[1]
- assertCompile(not scope.specials[name],
- ("symbol %s may be overshadowed by a special form or macro"):format(name), ast)
- assertCompile(not isQuoted(symbol), 'macro tried to bind ' .. name ..
- ' without gensym; try ' .. name .. '# instead', ast)
-
-end
-
--- Declare a local symbol
-local function declareLocal(symbol, meta, scope, ast)
- checkBindingValid(symbol, scope, ast)
- local name = symbol[1]
- assertCompile(not isMultiSym(name), "did not expect mutltisym", ast)
- local mangling = localMangling(name, scope, ast)
+ end
+ local function autogensym(base, scope)
+ local _0_0 = utils["is-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