4202 lines
159 KiB
Lua
4202 lines
159 KiB
Lua
package.preload["fennel.repl"] = package.preload["fennel.repl"] or function(...)
|
|
local utils = require("fennel.utils")
|
|
local parser = require("fennel.parser")
|
|
local compiler = require("fennel.compiler")
|
|
local specials = require("fennel.specials")
|
|
local function default_read_chunk(parser_state)
|
|
local function _0_()
|
|
if (0 < parser_state["stack-size"]) then
|
|
return ".."
|
|
else
|
|
return ">> "
|
|
end
|
|
end
|
|
io.write(_0_())
|
|
io.flush()
|
|
local input = io.read()
|
|
return (input and (input .. "\n"))
|
|
end
|
|
local function default_on_values(xs)
|
|
io.write(table.concat(xs, "\9"))
|
|
return io.write("\n")
|
|
end
|
|
local function default_on_error(errtype, err, lua_source)
|
|
local function _1_()
|
|
local _0_0 = errtype
|
|
if (_0_0 == "Lua Compile") then
|
|
return ("Bad code generated - likely a bug with the compiler:\n" .. "--- Generated Lua Start ---\n" .. lua_source .. "--- Generated Lua End ---\n")
|
|
elseif (_0_0 == "Runtime") then
|
|
return (compiler.traceback(tostring(err), 4) .. "\n")
|
|
else
|
|
local _ = _0_0
|
|
return ("%s error: %s\n"):format(errtype, tostring(err))
|
|
end
|
|
end
|
|
return io.write(_1_())
|
|
end
|
|
local save_source = table.concat({"local ___i___ = 1", "while true do", " local name, value = debug.getlocal(1, ___i___)", " if(name and name ~= \"___i___\") then", " ___replLocals___[name] = value", " ___i___ = ___i___ + 1", " else break end end"}, "\n")
|
|
local function splice_save_locals(env, lua_source)
|
|
env.___replLocals___ = (env.___replLocals___ or {})
|
|
local spliced_source = {}
|
|
local bind = "local %s = ___replLocals___['%s']"
|
|
for line in lua_source:gmatch("([^\n]+)\n?") do
|
|
table.insert(spliced_source, line)
|
|
end
|
|
for name in pairs(env.___replLocals___) do
|
|
table.insert(spliced_source, 1, bind:format(name, name))
|
|
end
|
|
if ((1 < #spliced_source) and (spliced_source[#spliced_source]):match("^ *return .*$")) then
|
|
table.insert(spliced_source, #spliced_source, save_source)
|
|
end
|
|
return table.concat(spliced_source, "\n")
|
|
end
|
|
local commands = {}
|
|
local function command_3f(input)
|
|
return input:match("^%s*,")
|
|
end
|
|
local function command_docs()
|
|
local _0_
|
|
do
|
|
local tbl_0_ = {}
|
|
for name, f in pairs(commands) do
|
|
tbl_0_[(#tbl_0_ + 1)] = (" ,%s - %s"):format(name, ((compiler.metadata):get(f, "fnl/docstring") or "undocumented"))
|
|
end
|
|
_0_ = tbl_0_
|
|
end
|
|
return table.concat(_0_, "\n")
|
|
end
|
|
commands.help = function(_, _0, on_values)
|
|
return on_values({("Welcome to Fennel.\nThis is the REPL where you can enter code to be evaluated.\nYou can also run these repl commands:\n\n" .. command_docs() .. "\n ,exit - Leave the repl.\n\nUse (doc something) to see descriptions for individual macros and special forms.\n\nFor more information about the language, see https://fennel-lang.org/reference")})
|
|
end
|
|
do end (compiler.metadata):set(commands.help, "fnl/docstring", "Show this message.")
|
|
local function reload(module_name, env, on_values, on_error)
|
|
local _0_0, _1_0 = pcall(specials["load-code"]("return require(...)", env), module_name)
|
|
if ((_0_0 == true) and (nil ~= _1_0)) then
|
|
local old = _1_0
|
|
local _ = nil
|
|
package.loaded[module_name] = nil
|
|
_ = nil
|
|
local ok, new = pcall(require, module_name)
|
|
local new0 = nil
|
|
if not ok then
|
|
on_values({new})
|
|
new0 = old
|
|
else
|
|
new0 = new
|
|
end
|
|
if ((type(old) == "table") and (type(new0) == "table")) then
|
|
for k, v in pairs(new0) do
|
|
old[k] = v
|
|
end
|
|
for k in pairs(old) do
|
|
if (nil == new0[k]) then
|
|
old[k] = nil
|
|
end
|
|
end
|
|
package.loaded[module_name] = old
|
|
end
|
|
return on_values({"ok"})
|
|
elseif ((_0_0 == false) and (nil ~= _1_0)) then
|
|
local msg = _1_0
|
|
local function _3_()
|
|
local _2_0 = msg:gsub("\n.*", "")
|
|
return _2_0
|
|
end
|
|
return on_error("Runtime", _3_())
|
|
end
|
|
end
|
|
commands.reload = function(env, read, on_values, on_error)
|
|
local _0_0, _1_0, _2_0 = pcall(read)
|
|
if ((_0_0 == true) and (_1_0 == true) and (nil ~= _2_0)) then
|
|
local module_sym = _2_0
|
|
return reload(tostring(module_sym), env, on_values, on_error)
|
|
elseif ((_0_0 == false) and true and true) then
|
|
local _3fparse_ok = _1_0
|
|
local _3fmsg = _2_0
|
|
return on_error("Parse", (_3fmsg or _3fparse_ok))
|
|
end
|
|
end
|
|
do end (compiler.metadata):set(commands.reload, "fnl/docstring", "Reload the specified module.")
|
|
commands.reset = function(env, _, on_values)
|
|
env.___replLocals___ = {}
|
|
return on_values({"ok"})
|
|
end
|
|
do end (compiler.metadata):set(commands.reset, "fnl/docstring", "Erase all repl-local scope.")
|
|
local function load_plugin_commands()
|
|
if (utils.root and utils.root.options and utils.root.options.plugins) then
|
|
for _, plugin in ipairs(utils.root.options.plugins) do
|
|
for name, f in pairs(plugin) do
|
|
local _0_0 = name:match("^repl%-command%-(.*)")
|
|
if (nil ~= _0_0) then
|
|
local cmd_name = _0_0
|
|
commands[cmd_name] = (commands[cmd_name] or f)
|
|
end
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
end
|
|
local function run_command(input, read, loop, env, on_values, on_error)
|
|
load_plugin_commands()
|
|
local command_name = input:match(",([^%s/]+)")
|
|
do
|
|
local _0_0 = commands[command_name]
|
|
if (nil ~= _0_0) then
|
|
local command = _0_0
|
|
command(env, read, on_values, on_error)
|
|
else
|
|
local _ = _0_0
|
|
if ("exit" ~= command_name) then
|
|
on_values({"Unknown command", command_name})
|
|
end
|
|
end
|
|
end
|
|
if ("exit" ~= command_name) then
|
|
return loop()
|
|
end
|
|
end
|
|
local function completer(env, scope, text)
|
|
local matches = {}
|
|
local input_fragment = text:gsub(".*[%s)(]+", "")
|
|
local function add_partials(input, tbl, prefix)
|
|
for k in utils.allpairs(tbl) do
|
|
local k0 = nil
|
|
if ((tbl == env) or (tbl == env.___replLocals___)) then
|
|
k0 = scope.unmanglings[k]
|
|
else
|
|
k0 = k
|
|
end
|
|
if ((#matches < 2000) and (type(k0) == "string") and (input == k0:sub(0, #input))) then
|
|
table.insert(matches, (prefix .. k0))
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
local function add_matches(input, tbl, prefix)
|
|
local prefix0 = nil
|
|
if prefix then
|
|
prefix0 = (prefix .. ".")
|
|
else
|
|
prefix0 = ""
|
|
end
|
|
if not input:find("%.") then
|
|
return add_partials(input, tbl, prefix0)
|
|
else
|
|
local head, tail = input:match("^([^.]+)%.(.*)")
|
|
local raw_head = nil
|
|
if ((tbl == env) or (tbl == env.___replLocals___)) then
|
|
raw_head = scope.manglings[head]
|
|
else
|
|
raw_head = head
|
|
end
|
|
if (type(tbl[raw_head]) == "table") then
|
|
return add_matches(tail, tbl[raw_head], (prefix0 .. head))
|
|
end
|
|
end
|
|
end
|
|
add_matches(input_fragment, (scope.specials or {}))
|
|
add_matches(input_fragment, (scope.macros or {}))
|
|
add_matches(input_fragment, (env.___replLocals___ or {}))
|
|
add_matches(input_fragment, env)
|
|
add_matches(input_fragment, (env._ENV or env._G or {}))
|
|
return matches
|
|
end
|
|
local function repl(options)
|
|
local old_root_options = utils.root.options
|
|
local env = nil
|
|
if options.env then
|
|
env = specials["wrap-env"](options.env)
|
|
else
|
|
env = setmetatable({}, {__index = (rawget(_G, "_ENV") or _G)})
|
|
end
|
|
local save_locals_3f = ((options.saveLocals ~= false) and env.debug and env.debug.getlocal)
|
|
local opts = {}
|
|
local _ = nil
|
|
for k, v in pairs(options) do
|
|
opts[k] = v
|
|
end
|
|
_ = nil
|
|
local read_chunk = (opts.readChunk or default_read_chunk)
|
|
local on_values = (opts.onValues or default_on_values)
|
|
local on_error = (opts.onError or default_on_error)
|
|
local pp = (opts.pp or tostring)
|
|
local byte_stream, clear_stream = parser.granulate(read_chunk)
|
|
local chars = {}
|
|
local read, reset = nil, nil
|
|
local function _1_(parser_state)
|
|
local c = byte_stream(parser_state)
|
|
table.insert(chars, c)
|
|
return c
|
|
end
|
|
read, reset = parser.parser(_1_)
|
|
local scope = compiler["make-scope"]()
|
|
opts.useMetadata = (options.useMetadata ~= false)
|
|
if (opts.allowedGlobals == nil) then
|
|
opts.allowedGlobals = specials["current-global-names"](opts.env)
|
|
end
|
|
if opts.registerCompleter then
|
|
local function _3_(...)
|
|
return completer(env, scope, ...)
|
|
end
|
|
opts.registerCompleter(_3_)
|
|
end
|
|
local function print_values(...)
|
|
local vals = {...}
|
|
local out = {}
|
|
env._, env.__ = vals[1], vals
|
|
for i = 1, select("#", ...) do
|
|
table.insert(out, pp(vals[i]))
|
|
end
|
|
return on_values(out)
|
|
end
|
|
local function loop()
|
|
for k in pairs(chars) do
|
|
chars[k] = nil
|
|
end
|
|
local ok, parse_ok_3f, x = pcall(read)
|
|
local src_string = string.char((table.unpack or _G.unpack)(chars))
|
|
utils.root.options = opts
|
|
if not ok then
|
|
on_error("Parse", parse_ok_3f)
|
|
clear_stream()
|
|
reset()
|
|
return loop()
|
|
elseif command_3f(src_string) then
|
|
return run_command(src_string, read, loop, env, on_values, on_error)
|
|
else
|
|
if parse_ok_3f then
|
|
do
|
|
local _4_0, _5_0 = pcall(compiler.compile, x, {["assert-compile"] = opts["assert-compile"], ["parse-error"] = opts["parse-error"], correlate = opts.correlate, moduleName = opts.moduleName, scope = scope, source = src_string, useMetadata = opts.useMetadata})
|
|
if ((_4_0 == false) and (nil ~= _5_0)) then
|
|
local msg = _5_0
|
|
clear_stream()
|
|
on_error("Compile", msg)
|
|
elseif ((_4_0 == true) and (nil ~= _5_0)) then
|
|
local src = _5_0
|
|
local src0 = nil
|
|
if save_locals_3f then
|
|
src0 = splice_save_locals(env, src)
|
|
else
|
|
src0 = src
|
|
end
|
|
local _7_0, _8_0 = pcall(specials["load-code"], src0, env)
|
|
if ((_7_0 == false) and (nil ~= _8_0)) then
|
|
local msg = _8_0
|
|
clear_stream()
|
|
on_error("Lua Compile", msg, src0)
|
|
elseif (true and (nil ~= _8_0)) then
|
|
local _0 = _7_0
|
|
local chunk = _8_0
|
|
local function _9_()
|
|
return print_values(chunk())
|
|
end
|
|
local function _10_(...)
|
|
return on_error("Runtime", ...)
|
|
end
|
|
xpcall(_9_, _10_)
|
|
end
|
|
end
|
|
end
|
|
utils.root.options = old_root_options
|
|
return loop()
|
|
end
|
|
end
|
|
end
|
|
return loop()
|
|
end
|
|
return repl
|
|
end
|
|
package.preload["fennel.view"] = package.preload["fennel.view"] or function(...)
|
|
local type_order = {["function"] = 5, boolean = 2, number = 1, string = 3, table = 4, thread = 7, userdata = 6}
|
|
local function sort_keys(_0_0, _1_0)
|
|
local _1_ = _0_0
|
|
local a = _1_[1]
|
|
local _2_ = _1_0
|
|
local b = _2_[1]
|
|
local ta = type(a)
|
|
local tb = type(b)
|
|
if ((ta == tb) and ((ta == "string") or (ta == "number"))) then
|
|
return (a < b)
|
|
else
|
|
local dta = type_order[ta]
|
|
local dtb = type_order[tb]
|
|
if (dta and dtb) then
|
|
return (dta < dtb)
|
|
elseif dta then
|
|
return true
|
|
elseif dtb then
|
|
return false
|
|
else
|
|
return (ta < tb)
|
|
end
|
|
end
|
|
end
|
|
local function table_kv_pairs(t)
|
|
local assoc_3f = false
|
|
local i = 1
|
|
local kv = {}
|
|
local insert = table.insert
|
|
for k, v in pairs(t) do
|
|
if ((type(k) ~= "number") or (k ~= i)) then
|
|
assoc_3f = true
|
|
end
|
|
i = (i + 1)
|
|
insert(kv, {k, v})
|
|
end
|
|
table.sort(kv, sort_keys)
|
|
if (#kv == 0) then
|
|
return kv, "empty"
|
|
else
|
|
local function _2_()
|
|
if assoc_3f then
|
|
return "table"
|
|
else
|
|
return "seq"
|
|
end
|
|
end
|
|
return kv, _2_()
|
|
end
|
|
end
|
|
local function count_table_appearances(t, appearances)
|
|
if (type(t) == "table") then
|
|
if not appearances[t] then
|
|
appearances[t] = 1
|
|
for k, v in pairs(t) do
|
|
count_table_appearances(k, appearances)
|
|
count_table_appearances(v, appearances)
|
|
end
|
|
else
|
|
appearances[t] = ((appearances[t] or 0) + 1)
|
|
end
|
|
end
|
|
return appearances
|
|
end
|
|
local function save_table(t, seen)
|
|
local seen0 = (seen or {len = 0})
|
|
local id = (seen0.len + 1)
|
|
if not seen0[t] then
|
|
seen0[t] = id
|
|
seen0.len = id
|
|
end
|
|
return seen0
|
|
end
|
|
local function detect_cycle(t, seen, _3fk)
|
|
if ("table" == type(t)) then
|
|
seen[t] = true
|
|
local _2_0, _3_0 = next(t, _3fk)
|
|
if ((nil ~= _2_0) and (nil ~= _3_0)) then
|
|
local k = _2_0
|
|
local v = _3_0
|
|
return (seen[k] or detect_cycle(k, seen) or seen[v] or detect_cycle(v, seen) or detect_cycle(t, seen, k))
|
|
end
|
|
end
|
|
end
|
|
local function visible_cycle_3f(t, options)
|
|
return (options["detect-cycles?"] and detect_cycle(t, {}) and save_table(t, options.seen) and (1 < (options.appearances[t] or 0)))
|
|
end
|
|
local function table_indent(t, indent, id)
|
|
local opener_length = nil
|
|
if id then
|
|
opener_length = (#tostring(id) + 2)
|
|
else
|
|
opener_length = 1
|
|
end
|
|
return (indent + opener_length)
|
|
end
|
|
local pp = nil
|
|
local function concat_table_lines(elements, options, multiline_3f, indent, table_type, prefix)
|
|
local indent_str = ("\n" .. string.rep(" ", indent))
|
|
local open = nil
|
|
local function _2_()
|
|
if ("seq" == table_type) then
|
|
return "["
|
|
else
|
|
return "{"
|
|
end
|
|
end
|
|
open = ((prefix or "") .. _2_())
|
|
local close = nil
|
|
if ("seq" == table_type) then
|
|
close = "]"
|
|
else
|
|
close = "}"
|
|
end
|
|
local oneline = (open .. table.concat(elements, " ") .. close)
|
|
if (not options["one-line?"] and (multiline_3f or ((indent + #oneline) > options["line-length"]))) then
|
|
return (open .. table.concat(elements, indent_str) .. close)
|
|
else
|
|
return oneline
|
|
end
|
|
end
|
|
local function pp_associative(t, kv, options, indent, key_3f)
|
|
local multiline_3f = false
|
|
local id = options.seen[t]
|
|
if (options.level >= options.depth) then
|
|
return "{...}"
|
|
elseif (id and options["detect-cycles?"]) then
|
|
return ("@" .. id .. "{...}")
|
|
else
|
|
local visible_cycle_3f0 = visible_cycle_3f(t, options)
|
|
local id0 = (visible_cycle_3f0 and options.seen[t])
|
|
local indent0 = table_indent(t, indent, id0)
|
|
local slength = nil
|
|
local function _3_()
|
|
local _2_0 = rawget(_G, "utf8")
|
|
if _2_0 then
|
|
return _2_0.len
|
|
else
|
|
return _2_0
|
|
end
|
|
end
|
|
local function _4_(_241)
|
|
return #_241
|
|
end
|
|
slength = ((options["utf8?"] and _3_()) or _4_)
|
|
local prefix = nil
|
|
if visible_cycle_3f0 then
|
|
prefix = ("@" .. id0)
|
|
else
|
|
prefix = ""
|
|
end
|
|
local items = nil
|
|
do
|
|
local tbl_0_ = {}
|
|
for _, _6_0 in pairs(kv) do
|
|
local _7_ = _6_0
|
|
local k = _7_[1]
|
|
local v = _7_[2]
|
|
local _8_
|
|
do
|
|
local k0 = pp(k, options, (indent0 + 1), true)
|
|
local v0 = pp(v, options, (indent0 + slength(k0) + 1))
|
|
multiline_3f = (multiline_3f or k0:find("\n") or v0:find("\n"))
|
|
_8_ = (k0 .. " " .. v0)
|
|
end
|
|
tbl_0_[(#tbl_0_ + 1)] = _8_
|
|
end
|
|
items = tbl_0_
|
|
end
|
|
return concat_table_lines(items, options, multiline_3f, indent0, "table", prefix)
|
|
end
|
|
end
|
|
local function pp_sequence(t, kv, options, indent)
|
|
local multiline_3f = false
|
|
local id = options.seen[t]
|
|
if (options.level >= options.depth) then
|
|
return "[...]"
|
|
elseif (id and options["detect-cycles?"]) then
|
|
return ("@" .. id .. "[...]")
|
|
else
|
|
local visible_cycle_3f0 = visible_cycle_3f(t, options)
|
|
local id0 = (visible_cycle_3f0 and options.seen[t])
|
|
local indent0 = table_indent(t, indent, id0)
|
|
local prefix = nil
|
|
if visible_cycle_3f0 then
|
|
prefix = ("@" .. id0)
|
|
else
|
|
prefix = ""
|
|
end
|
|
local items = nil
|
|
do
|
|
local tbl_0_ = {}
|
|
for _, _3_0 in pairs(kv) do
|
|
local _4_ = _3_0
|
|
local _0 = _4_[1]
|
|
local v = _4_[2]
|
|
local _5_
|
|
do
|
|
local v0 = pp(v, options, indent0)
|
|
multiline_3f = (multiline_3f or v0:find("\n"))
|
|
_5_ = v0
|
|
end
|
|
tbl_0_[(#tbl_0_ + 1)] = _5_
|
|
end
|
|
items = tbl_0_
|
|
end
|
|
return concat_table_lines(items, options, multiline_3f, indent0, "seq", prefix)
|
|
end
|
|
end
|
|
local function concat_lines(lines, options, indent, force_multi_line_3f)
|
|
if (#lines == 0) then
|
|
if options["empty-as-sequence?"] then
|
|
return "[]"
|
|
else
|
|
return "{}"
|
|
end
|
|
else
|
|
local oneline = nil
|
|
local _2_
|
|
do
|
|
local tbl_0_ = {}
|
|
for _, line in ipairs(lines) do
|
|
tbl_0_[(#tbl_0_ + 1)] = line:gsub("^%s+", "")
|
|
end
|
|
_2_ = tbl_0_
|
|
end
|
|
oneline = table.concat(_2_, " ")
|
|
if (not options["one-line?"] and (force_multi_line_3f or oneline:find("\n") or ((indent + #oneline) > options["line-length"]))) then
|
|
return table.concat(lines, ("\n" .. string.rep(" ", indent)))
|
|
else
|
|
return oneline
|
|
end
|
|
end
|
|
end
|
|
local function pp_metamethod(t, metamethod, options, indent)
|
|
if (options.level >= options.depth) then
|
|
if options["empty-as-sequence?"] then
|
|
return "[...]"
|
|
else
|
|
return "{...}"
|
|
end
|
|
else
|
|
local _ = nil
|
|
local function _2_(_241)
|
|
return visible_cycle_3f(_241, options)
|
|
end
|
|
options["visible-cycle?"] = _2_
|
|
_ = nil
|
|
local lines, force_multi_line_3f = metamethod(t, pp, options, indent)
|
|
options["visible-cycle?"] = nil
|
|
local _3_0 = type(lines)
|
|
if (_3_0 == "string") then
|
|
return lines
|
|
elseif (_3_0 == "table") then
|
|
return concat_lines(lines, options, indent, force_multi_line_3f)
|
|
else
|
|
local _0 = _3_0
|
|
return error("__fennelview metamethod must return a table of lines")
|
|
end
|
|
end
|
|
end
|
|
local function pp_table(x, options, indent)
|
|
options.level = (options.level + 1)
|
|
local x0 = nil
|
|
do
|
|
local _2_0 = nil
|
|
if options["metamethod?"] then
|
|
local _3_0 = x
|
|
if _3_0 then
|
|
local _4_0 = getmetatable(_3_0)
|
|
if _4_0 then
|
|
_2_0 = _4_0.__fennelview
|
|
else
|
|
_2_0 = _4_0
|
|
end
|
|
else
|
|
_2_0 = _3_0
|
|
end
|
|
else
|
|
_2_0 = nil
|
|
end
|
|
if (nil ~= _2_0) then
|
|
local metamethod = _2_0
|
|
x0 = pp_metamethod(x, metamethod, options, indent)
|
|
else
|
|
local _ = _2_0
|
|
local _4_0, _5_0 = table_kv_pairs(x)
|
|
if (true and (_5_0 == "empty")) then
|
|
local _0 = _4_0
|
|
if options["empty-as-sequence?"] then
|
|
x0 = "[]"
|
|
else
|
|
x0 = "{}"
|
|
end
|
|
elseif ((nil ~= _4_0) and (_5_0 == "table")) then
|
|
local kv = _4_0
|
|
x0 = pp_associative(x, kv, options, indent)
|
|
elseif ((nil ~= _4_0) and (_5_0 == "seq")) then
|
|
local kv = _4_0
|
|
x0 = pp_sequence(x, kv, options, indent)
|
|
else
|
|
x0 = nil
|
|
end
|
|
end
|
|
end
|
|
options.level = (options.level - 1)
|
|
return x0
|
|
end
|
|
local function number__3estring(n)
|
|
local _2_0 = string.gsub(tostring(n), ",", ".")
|
|
return _2_0
|
|
end
|
|
local function colon_string_3f(s)
|
|
return s:find("^[-%w?^_!$%&*+./@|<=>]+$")
|
|
end
|
|
local function pp_string(str, options, indent)
|
|
local escs = nil
|
|
local _2_
|
|
if (options["escape-newlines?"] and (#str < (options["line-length"] - indent))) then
|
|
_2_ = "\\n"
|
|
else
|
|
_2_ = "\n"
|
|
end
|
|
local function _4_(_241, _242)
|
|
return ("\\%03d"):format(_242:byte())
|
|
end
|
|
escs = setmetatable({["\""] = "\\\"", ["\11"] = "\\v", ["\12"] = "\\f", ["\13"] = "\\r", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\\"] = "\\\\", ["\n"] = _2_}, {__index = _4_})
|
|
return ("\"" .. str:gsub("[%c\\\"]", escs) .. "\"")
|
|
end
|
|
local function make_options(t, options)
|
|
local defaults = {["detect-cycles?"] = true, ["empty-as-sequence?"] = false, ["escape-newlines?"] = false, ["line-length"] = 80, ["metamethod?"] = true, ["one-line?"] = false, ["prefer-colon?"] = false, ["utf8?"] = true, depth = 128}
|
|
local overrides = {appearances = count_table_appearances(t, {}), level = 0, seen = {len = 0}}
|
|
for k, v in pairs((options or {})) do
|
|
defaults[k] = v
|
|
end
|
|
for k, v in pairs(overrides) do
|
|
defaults[k] = v
|
|
end
|
|
return defaults
|
|
end
|
|
local function _2_(x, options, indent, colon_3f)
|
|
local indent0 = (indent or 0)
|
|
local options0 = (options or make_options(x))
|
|
local tv = type(x)
|
|
local function _4_()
|
|
local _3_0 = getmetatable(x)
|
|
if _3_0 then
|
|
return _3_0.__fennelview
|
|
else
|
|
return _3_0
|
|
end
|
|
end
|
|
if ((tv == "table") or ((tv == "userdata") and _4_())) then
|
|
return pp_table(x, options0, indent0)
|
|
elseif (tv == "number") then
|
|
return number__3estring(x)
|
|
else
|
|
local function _5_()
|
|
if (colon_3f ~= nil) then
|
|
return colon_3f
|
|
elseif ("function" == type(options0["prefer-colon?"])) then
|
|
return options0["prefer-colon?"](x)
|
|
else
|
|
return options0["prefer-colon?"]
|
|
end
|
|
end
|
|
if ((tv == "string") and colon_string_3f(x) and _5_()) then
|
|
return (":" .. x)
|
|
elseif (tv == "string") then
|
|
return pp_string(x, options0, indent0)
|
|
elseif ((tv == "boolean") or (tv == "nil")) then
|
|
return tostring(x)
|
|
else
|
|
return ("#<" .. tostring(x) .. ">")
|
|
end
|
|
end
|
|
end
|
|
pp = _2_
|
|
local function view(x, options)
|
|
return pp(x, make_options(x, options), 0)
|
|
end
|
|
return view
|
|
end
|
|
package.preload["fennel.specials"] = package.preload["fennel.specials"] or function(...)
|
|
local utils = require("fennel.utils")
|
|
local view = require("fennel.view")
|
|
local parser = require("fennel.parser")
|
|
local compiler = require("fennel.compiler")
|
|
local unpack = (table.unpack or _G.unpack)
|
|
local SPECIALS = compiler.scopes.global.specials
|
|
local function wrap_env(env)
|
|
local function _0_(_, key)
|
|
if (type(key) == "string") then
|
|
return env[compiler["global-unmangling"](key)]
|
|
else
|
|
return env[key]
|
|
end
|
|
end
|
|
local function _1_(_, key, value)
|
|
if (type(key) == "string") then
|
|
env[compiler["global-unmangling"](key)] = value
|
|
return nil
|
|
else
|
|
env[key] = value
|
|
return nil
|
|
end
|
|
end
|
|
local function _2_()
|
|
local function putenv(k, v)
|
|
local _3_
|
|
if (type(k) == "string") then
|
|
_3_ = compiler["global-unmangling"](k)
|
|
else
|
|
_3_ = k
|
|
end
|
|
return _3_, v
|
|
end
|
|
return next, utils.kvmap(env, putenv), nil
|
|
end
|
|
return setmetatable({}, {__index = _0_, __newindex = _1_, __pairs = _2_})
|
|
end
|
|
local function current_global_names(env)
|
|
return utils.kvmap((env or _G), compiler["global-unmangling"])
|
|
end
|
|
local function load_code(code, environment, filename)
|
|
local environment0 = (environment or rawget(_G, "_ENV") or _G)
|
|
if (rawget(_G, "setfenv") and rawget(_G, "loadstring")) then
|
|
local f = assert(_G.loadstring(code, filename))
|
|
_G.setfenv(f, environment0)
|
|
return f
|
|
else
|
|
return assert(load(code, filename, "t", environment0))
|
|
end
|
|
end
|
|
local function doc_2a(tgt, name)
|
|
if not tgt then
|
|
return (name .. " not found")
|
|
else
|
|
local docstring = (((compiler.metadata):get(tgt, "fnl/docstring") or "#<undocumented>")):gsub("\n$", ""):gsub("\n", "\n ")
|
|
local mt = getmetatable(tgt)
|
|
if ((type(tgt) == "function") or ((type(mt) == "table") and (type(mt.__call) == "function"))) then
|
|
local arglist = table.concat(((compiler.metadata):get(tgt, "fnl/arglist") or {"#<unknown-arguments>"}), " ")
|
|
local _0_
|
|
if (#arglist > 0) then
|
|
_0_ = " "
|
|
else
|
|
_0_ = ""
|
|
end
|
|
return string.format("(%s%s%s)\n %s", name, _0_, arglist, docstring)
|
|
else
|
|
return string.format("%s\n %s", name, docstring)
|
|
end
|
|
end
|
|
end
|
|
local function doc_special(name, arglist, docstring)
|
|
compiler.metadata[SPECIALS[name]] = {["fnl/arglist"] = arglist, ["fnl/docstring"] = docstring}
|
|
return nil
|
|
end
|
|
local function compile_do(ast, scope, parent, start)
|
|
local start0 = (start or 2)
|
|
local len = #ast
|
|
local sub_scope = compiler["make-scope"](scope)
|
|
for i = start0, len do
|
|
compiler.compile1(ast[i], sub_scope, parent, {nval = 0})
|
|
end
|
|
return nil
|
|
end
|
|
SPECIALS["do"] = function(ast, scope, parent, opts, start, chunk, sub_scope, pre_syms)
|
|
local start0 = (start or 2)
|
|
local sub_scope0 = (sub_scope or compiler["make-scope"](scope))
|
|
local chunk0 = (chunk or {})
|
|
local len = #ast
|
|
local retexprs = {returned = true}
|
|
local function compile_body(outer_target, outer_tail, outer_retexprs)
|
|
if (len < start0) then
|
|
compiler.compile1(nil, sub_scope0, chunk0, {tail = outer_tail, target = outer_target})
|
|
else
|
|
for i = start0, len do
|
|
local subopts = {nval = (((i ~= len) and 0) or opts.nval), tail = (((i == len) and outer_tail) or nil), target = (((i == len) and outer_target) or nil)}
|
|
local _ = utils["propagate-options"](opts, subopts)
|
|
local subexprs = compiler.compile1(ast[i], sub_scope0, chunk0, subopts)
|
|
if (i ~= len) then
|
|
compiler["keep-side-effects"](subexprs, parent, nil, ast[i])
|
|
end
|
|
end
|
|
end
|
|
compiler.emit(parent, chunk0, ast)
|
|
compiler.emit(parent, "end", ast)
|
|
return (outer_retexprs or retexprs)
|
|
end
|
|
if (opts.target or (opts.nval == 0) or opts.tail) then
|
|
compiler.emit(parent, "do", ast)
|
|
return compile_body(opts.target, opts.tail)
|
|
elseif opts.nval then
|
|
local syms = {}
|
|
for i = 1, opts.nval do
|
|
local s = ((pre_syms and pre_syms[i]) or compiler.gensym(scope))
|
|
syms[i] = s
|
|
retexprs[i] = utils.expr(s, "sym")
|
|
end
|
|
local outer_target = table.concat(syms, ", ")
|
|
compiler.emit(parent, string.format("local %s", outer_target), ast)
|
|
compiler.emit(parent, "do", ast)
|
|
return compile_body(outer_target, opts.tail)
|
|
else
|
|
local fname = compiler.gensym(scope)
|
|
local fargs = nil
|
|
if scope.vararg then
|
|
fargs = "..."
|
|
else
|
|
fargs = ""
|
|
end
|
|
compiler.emit(parent, string.format("local function %s(%s)", fname, fargs), ast)
|
|
utils.hook("do", ast, sub_scope0)
|
|
return compile_body(nil, true, utils.expr((fname .. "(" .. fargs .. ")"), "statement"))
|
|
end
|
|
end
|
|
doc_special("do", {"..."}, "Evaluate multiple forms; return last value.")
|
|
SPECIALS.values = function(ast, scope, parent)
|
|
local len = #ast
|
|
local exprs = {}
|
|
for i = 2, len do
|
|
local subexprs = compiler.compile1(ast[i], scope, parent, {nval = ((i ~= len) and 1)})
|
|
table.insert(exprs, subexprs[1])
|
|
if (i == len) then
|
|
for j = 2, #subexprs do
|
|
table.insert(exprs, subexprs[j])
|
|
end
|
|
end
|
|
end
|
|
return exprs
|
|
end
|
|
doc_special("values", {"..."}, "Return multiple values from a function. Must be in tail position.")
|
|
local function deep_tostring(x, key_3f)
|
|
local elems = {}
|
|
if utils["sequence?"](x) then
|
|
local _0_
|
|
do
|
|
local tbl_0_ = {}
|
|
for _, v in ipairs(x) do
|
|
tbl_0_[(#tbl_0_ + 1)] = deep_tostring(v)
|
|
end
|
|
_0_ = tbl_0_
|
|
end
|
|
return ("[" .. table.concat(_0_, " ") .. "]")
|
|
elseif utils["table?"](x) then
|
|
local _0_
|
|
do
|
|
local tbl_0_ = {}
|
|
for k, v in pairs(x) do
|
|
tbl_0_[(#tbl_0_ + 1)] = (deep_tostring(k, true) .. " " .. deep_tostring(v))
|
|
end
|
|
_0_ = tbl_0_
|
|
end
|
|
return ("{" .. table.concat(_0_, " ") .. "}")
|
|
elseif (key_3f and (type(x) == "string") and x:find("^[-%w?\\^_!$%&*+./@:|<=>]+$")) then
|
|
return (":" .. x)
|
|
elseif (type(x) == "string") then
|
|
return string.format("%q", x):gsub("\\\"", "\\\\\""):gsub("\"", "\\\"")
|
|
else
|
|
return tostring(x)
|
|
end
|
|
end
|
|
local function set_fn_metadata(arg_list, docstring, parent, fn_name)
|
|
if utils.root.options.useMetadata then
|
|
local args = nil
|
|
local function _0_(_241)
|
|
return ("\"%s\""):format(deep_tostring(_241))
|
|
end
|
|
args = utils.map(arg_list, _0_)
|
|
local meta_fields = {"\"fnl/arglist\"", ("{" .. table.concat(args, ", ") .. "}")}
|
|
if docstring then
|
|
table.insert(meta_fields, "\"fnl/docstring\"")
|
|
table.insert(meta_fields, ("\"" .. docstring:gsub("%s+$", ""):gsub("\\", "\\\\"):gsub("\n", "\\n"):gsub("\"", "\\\"") .. "\""))
|
|
end
|
|
local meta_str = ("require(\"%s\").metadata"):format((utils.root.options.moduleName or "fennel"))
|
|
return compiler.emit(parent, ("pcall(function() %s:setall(%s, %s) end)"):format(meta_str, fn_name, table.concat(meta_fields, ", ")))
|
|
end
|
|
end
|
|
local function get_fn_name(ast, scope, fn_name, multi)
|
|
if (fn_name and (fn_name[1] ~= "nil")) then
|
|
local _0_
|
|
if not multi then
|
|
_0_ = compiler["declare-local"](fn_name, {}, scope, ast)
|
|
else
|
|
_0_ = compiler["symbol-to-expression"](fn_name, scope)[1]
|
|
end
|
|
return _0_, not multi, 3
|
|
else
|
|
return nil, true, 2
|
|
end
|
|
end
|
|
local function compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, local_3f, arg_name_list, arg_list, docstring)
|
|
for i = (index + 1), #ast do
|
|
compiler.compile1(ast[i], f_scope, f_chunk, {nval = (((i ~= #ast) and 0) or nil), tail = (i == #ast)})
|
|
end
|
|
local _0_
|
|
if local_3f then
|
|
_0_ = "local function %s(%s)"
|
|
else
|
|
_0_ = "%s = function(%s)"
|
|
end
|
|
compiler.emit(parent, string.format(_0_, fn_name, table.concat(arg_name_list, ", ")), ast)
|
|
compiler.emit(parent, f_chunk, ast)
|
|
compiler.emit(parent, "end", ast)
|
|
set_fn_metadata(arg_list, docstring, parent, fn_name)
|
|
utils.hook("fn", ast, f_scope)
|
|
return utils.expr(fn_name, "sym")
|
|
end
|
|
local function compile_anonymous_fn(ast, f_scope, f_chunk, parent, index, arg_name_list, arg_list, docstring, scope)
|
|
local fn_name = compiler.gensym(scope)
|
|
return compile_named_fn(ast, f_scope, f_chunk, parent, index, fn_name, true, arg_name_list, arg_list, docstring)
|
|
end
|
|
SPECIALS.fn = function(ast, scope, parent)
|
|
local f_scope = nil
|
|
do
|
|
local _0_0 = compiler["make-scope"](scope)
|
|
_0_0["vararg"] = false
|
|
f_scope = _0_0
|
|
end
|
|
local f_chunk = {}
|
|
local fn_sym = utils["sym?"](ast[2])
|
|
local multi = (fn_sym and utils["multi-sym?"](fn_sym[1]))
|
|
local fn_name, local_3f, index = get_fn_name(ast, scope, fn_sym, multi)
|
|
local arg_list = compiler.assert(utils["table?"](ast[index]), "expected parameters table", ast)
|
|
compiler.assert((not multi or not multi["multi-sym-method-call"]), ("unexpected multi symbol " .. tostring(fn_name)), fn_sym)
|
|
local function get_arg_name(arg)
|
|
if utils["varg?"](arg) then
|
|
compiler.assert((arg == arg_list[#arg_list]), "expected vararg as last parameter", ast)
|
|
f_scope.vararg = true
|
|
return "..."
|
|
elseif (utils["sym?"](arg) and (utils.deref(arg) ~= "nil") and not utils["multi-sym?"](utils.deref(arg))) then
|
|
return compiler["declare-local"](arg, {}, f_scope, ast)
|
|
elseif utils["table?"](arg) then
|
|
local raw = utils.sym(compiler.gensym(scope))
|
|
local declared = compiler["declare-local"](raw, {}, f_scope, ast)
|
|
compiler.destructure(arg, raw, ast, f_scope, f_chunk, {declaration = true, nomulti = true, symtype = "arg"})
|
|
return declared
|
|
else
|
|
return compiler.assert(false, ("expected symbol for function parameter: %s"):format(tostring(arg)), ast[2])
|
|
end
|
|
end
|
|
local arg_name_list = utils.map(arg_list, get_arg_name)
|
|
local index0, docstring = nil, nil
|
|
if ((type(ast[(index + 1)]) == "string") and ((index + 1) < #ast)) then
|
|
index0, docstring = (index + 1), ast[(index + 1)]
|
|
else
|
|
index0, docstring = index, nil
|
|
end
|
|
if fn_name then
|
|
return compile_named_fn(ast, f_scope, f_chunk, parent, index0, fn_name, local_3f, arg_name_list, arg_list, docstring)
|
|
else
|
|
return compile_anonymous_fn(ast, f_scope, f_chunk, parent, index0, arg_name_list, arg_list, docstring, scope)
|
|
end
|
|
end
|
|
doc_special("fn", {"name?", "args", "docstring?", "..."}, "Function syntax. May optionally include a name and docstring.\nIf a name is provided, the function will be bound in the current scope.\nWhen called with the wrong number of args, excess args will be discarded\nand lacking args will be nil, use lambda for arity-checked functions.")
|
|
SPECIALS.lua = function(ast, _, parent)
|
|
compiler.assert(((#ast == 2) or (#ast == 3)), "expected 1 or 2 arguments", ast)
|
|
if (ast[2] ~= nil) then
|
|
table.insert(parent, {ast = ast, leaf = tostring(ast[2])})
|
|
end
|
|
if (ast[3] ~= nil) then
|
|
return tostring(ast[3])
|
|
end
|
|
end
|
|
SPECIALS.doc = function(ast, scope, parent)
|
|
assert(utils.root.options.useMetadata, "can't look up doc with metadata disabled.")
|
|
compiler.assert((#ast == 2), "expected one argument", ast)
|
|
local target = utils.deref(ast[2])
|
|
local special_or_macro = (scope.specials[target] or scope.macros[target])
|
|
if special_or_macro then
|
|
return ("print(%q)"):format(doc_2a(special_or_macro, target))
|
|
else
|
|
local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
|
|
local value = _0_[1]
|
|
return ("print(require('%s').doc(%s, '%s'))"):format((utils.root.options.moduleName or "fennel"), tostring(value), tostring(ast[2]))
|
|
end
|
|
end
|
|
doc_special("doc", {"x"}, "Print the docstring and arglist for a function, macro, or special form.")
|
|
local function dot(ast, scope, parent)
|
|
compiler.assert((1 < #ast), "expected table argument", ast)
|
|
local len = #ast
|
|
local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
|
|
local lhs = _0_[1]
|
|
if (len == 2) then
|
|
return tostring(lhs)
|
|
else
|
|
local indices = {}
|
|
for i = 3, len do
|
|
local index = ast[i]
|
|
if ((type(index) == "string") and utils["valid-lua-identifier?"](index)) then
|
|
table.insert(indices, ("." .. index))
|
|
else
|
|
local _1_ = compiler.compile1(index, scope, parent, {nval = 1})
|
|
local index0 = _1_[1]
|
|
table.insert(indices, ("[" .. tostring(index0) .. "]"))
|
|
end
|
|
end
|
|
if (tostring(lhs):find("[{\"0-9]") or ("nil" == tostring(lhs))) then
|
|
return ("(" .. tostring(lhs) .. ")" .. table.concat(indices))
|
|
else
|
|
return (tostring(lhs) .. table.concat(indices))
|
|
end
|
|
end
|
|
end
|
|
SPECIALS["."] = dot
|
|
doc_special(".", {"tbl", "key1", "..."}, "Look up key1 in tbl table. If more args are provided, do a nested lookup.")
|
|
SPECIALS.global = function(ast, scope, parent)
|
|
compiler.assert((#ast == 3), "expected name and value", ast)
|
|
compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceglobal = true, nomulti = true, symtype = "global"})
|
|
return nil
|
|
end
|
|
doc_special("global", {"name", "val"}, "Set name as a global with val.")
|
|
SPECIALS.set = function(ast, scope, parent)
|
|
compiler.assert((#ast == 3), "expected name and value", ast)
|
|
compiler.destructure(ast[2], ast[3], ast, scope, parent, {noundef = true, symtype = "set"})
|
|
return nil
|
|
end
|
|
doc_special("set", {"name", "val"}, "Set a local variable to a new value. Only works on locals using var.")
|
|
local function set_forcibly_21_2a(ast, scope, parent)
|
|
compiler.assert((#ast == 3), "expected name and value", ast)
|
|
compiler.destructure(ast[2], ast[3], ast, scope, parent, {forceset = true, symtype = "set"})
|
|
return nil
|
|
end
|
|
SPECIALS["set-forcibly!"] = set_forcibly_21_2a
|
|
local function local_2a(ast, scope, parent)
|
|
compiler.assert((#ast == 3), "expected name and value", ast)
|
|
compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, nomulti = true, symtype = "local"})
|
|
return nil
|
|
end
|
|
SPECIALS["local"] = local_2a
|
|
doc_special("local", {"name", "val"}, "Introduce new top-level immutable local.")
|
|
SPECIALS.var = function(ast, scope, parent)
|
|
compiler.assert((#ast == 3), "expected name and value", ast)
|
|
compiler.destructure(ast[2], ast[3], ast, scope, parent, {declaration = true, isvar = true, nomulti = true, symtype = "var"})
|
|
return nil
|
|
end
|
|
doc_special("var", {"name", "val"}, "Introduce new mutable local.")
|
|
SPECIALS.let = function(ast, scope, parent, opts)
|
|
local bindings = ast[2]
|
|
local pre_syms = {}
|
|
compiler.assert((utils["list?"](bindings) or utils["table?"](bindings)), "expected binding table", ast)
|
|
compiler.assert(((#bindings % 2) == 0), "expected even number of name/value bindings", ast[2])
|
|
compiler.assert((#ast >= 3), "expected body expression", ast[1])
|
|
for _ = 1, (opts.nval or 0) do
|
|
table.insert(pre_syms, compiler.gensym(scope))
|
|
end
|
|
local sub_scope = compiler["make-scope"](scope)
|
|
local sub_chunk = {}
|
|
for i = 1, #bindings, 2 do
|
|
compiler.destructure(bindings[i], bindings[(i + 1)], ast, sub_scope, sub_chunk, {declaration = true, nomulti = true, symtype = "let"})
|
|
end
|
|
return SPECIALS["do"](ast, scope, parent, opts, 3, sub_chunk, sub_scope, pre_syms)
|
|
end
|
|
doc_special("let", {"[name1 val1 ... nameN valN]", "..."}, "Introduces a new scope in which a given set of local bindings are used.")
|
|
SPECIALS.tset = function(ast, scope, parent)
|
|
compiler.assert((#ast > 3), "expected table, key, and value arguments", ast)
|
|
local root = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
|
|
local keys = {}
|
|
for i = 3, (#ast - 1) do
|
|
local _0_ = compiler.compile1(ast[i], scope, parent, {nval = 1})
|
|
local key = _0_[1]
|
|
table.insert(keys, tostring(key))
|
|
end
|
|
local value = compiler.compile1(ast[#ast], scope, parent, {nval = 1})[1]
|
|
local rootstr = tostring(root)
|
|
local fmtstr = nil
|
|
if rootstr:match("^{") then
|
|
fmtstr = "do end (%s)[%s] = %s"
|
|
else
|
|
fmtstr = "%s[%s] = %s"
|
|
end
|
|
return compiler.emit(parent, fmtstr:format(tostring(root), table.concat(keys, "]["), tostring(value)), ast)
|
|
end
|
|
doc_special("tset", {"tbl", "key1", "...", "keyN", "val"}, "Set the value of a table field. Can take additional keys to set\nnested values, but all parents must contain an existing table.")
|
|
local function calculate_target(scope, opts)
|
|
if not (opts.tail or opts.target or opts.nval) then
|
|
return "iife", true, nil
|
|
elseif (opts.nval and (opts.nval ~= 0) and not opts.target) then
|
|
local accum = {}
|
|
local target_exprs = {}
|
|
for i = 1, opts.nval do
|
|
local s = compiler.gensym(scope)
|
|
accum[i] = s
|
|
target_exprs[i] = utils.expr(s, "sym")
|
|
end
|
|
return "target", opts.tail, table.concat(accum, ", "), target_exprs
|
|
else
|
|
return "none", opts.tail, opts.target
|
|
end
|
|
end
|
|
local function if_2a(ast, scope, parent, opts)
|
|
local do_scope = compiler["make-scope"](scope)
|
|
local branches = {}
|
|
local wrapper, inner_tail, inner_target, target_exprs = calculate_target(scope, opts)
|
|
local body_opts = {nval = opts.nval, tail = inner_tail, target = inner_target}
|
|
local function compile_body(i)
|
|
local chunk = {}
|
|
local cscope = compiler["make-scope"](do_scope)
|
|
compiler["keep-side-effects"](compiler.compile1(ast[i], cscope, chunk, body_opts), chunk, nil, ast[i])
|
|
return {chunk = chunk, scope = cscope}
|
|
end
|
|
for i = 2, (#ast - 1), 2 do
|
|
local condchunk = {}
|
|
local res = compiler.compile1(ast[i], do_scope, condchunk, {nval = 1})
|
|
local cond = res[1]
|
|
local branch = compile_body((i + 1))
|
|
branch.cond = cond
|
|
branch.condchunk = condchunk
|
|
branch.nested = ((i ~= 2) and (next(condchunk, nil) == nil))
|
|
table.insert(branches, branch)
|
|
end
|
|
local has_else_3f = ((#ast > 3) and ((#ast % 2) == 0))
|
|
local else_branch = (has_else_3f and compile_body(#ast))
|
|
local s = compiler.gensym(scope)
|
|
local buffer = {}
|
|
local last_buffer = buffer
|
|
for i = 1, #branches do
|
|
local branch = branches[i]
|
|
local fstr = nil
|
|
if not branch.nested then
|
|
fstr = "if %s then"
|
|
else
|
|
fstr = "elseif %s then"
|
|
end
|
|
local cond = tostring(branch.cond)
|
|
local cond_line = nil
|
|
if ((cond == "true") and branch.nested and (i == #branches) and not has_else_3f) then
|
|
cond_line = "else"
|
|
else
|
|
cond_line = fstr:format(cond)
|
|
end
|
|
if branch.nested then
|
|
compiler.emit(last_buffer, branch.condchunk, ast)
|
|
else
|
|
for _, v in ipairs(branch.condchunk) do
|
|
compiler.emit(last_buffer, v, ast)
|
|
end
|
|
end
|
|
compiler.emit(last_buffer, cond_line, ast)
|
|
compiler.emit(last_buffer, branch.chunk, ast)
|
|
if (i == #branches) then
|
|
if has_else_3f then
|
|
compiler.emit(last_buffer, "else", ast)
|
|
compiler.emit(last_buffer, else_branch.chunk, ast)
|
|
elseif (inner_target and (cond_line ~= "else")) then
|
|
compiler.emit(last_buffer, "else", ast)
|
|
compiler.emit(last_buffer, ("%s = nil"):format(inner_target), ast)
|
|
end
|
|
compiler.emit(last_buffer, "end", ast)
|
|
elseif not branches[(i + 1)].nested then
|
|
local next_buffer = {}
|
|
compiler.emit(last_buffer, "else", ast)
|
|
compiler.emit(last_buffer, next_buffer, ast)
|
|
compiler.emit(last_buffer, "end", ast)
|
|
last_buffer = next_buffer
|
|
end
|
|
end
|
|
if (wrapper == "iife") then
|
|
local iifeargs = ((scope.vararg and "...") or "")
|
|
compiler.emit(parent, ("local function %s(%s)"):format(tostring(s), iifeargs), ast)
|
|
compiler.emit(parent, buffer, ast)
|
|
compiler.emit(parent, "end", ast)
|
|
return utils.expr(("%s(%s)"):format(tostring(s), iifeargs), "statement")
|
|
elseif (wrapper == "none") then
|
|
for i = 1, #buffer do
|
|
compiler.emit(parent, buffer[i], ast)
|
|
end
|
|
return {returned = true}
|
|
else
|
|
compiler.emit(parent, ("local %s"):format(inner_target), ast)
|
|
for i = 1, #buffer do
|
|
compiler.emit(parent, buffer[i], ast)
|
|
end
|
|
return target_exprs
|
|
end
|
|
end
|
|
SPECIALS["if"] = if_2a
|
|
doc_special("if", {"cond1", "body1", "...", "condN", "bodyN"}, "Conditional form.\nTakes any number of condition/body pairs and evaluates the first body where\nthe condition evaluates to truthy. Similar to cond in other lisps.")
|
|
local function remove_until_condition(bindings)
|
|
if ("until" == bindings[(#bindings - 1)]) then
|
|
table.remove(bindings, (#bindings - 1))
|
|
return table.remove(bindings)
|
|
end
|
|
end
|
|
local function compile_until(condition, scope, chunk)
|
|
if condition then
|
|
local _0_ = compiler.compile1(condition, scope, chunk, {nval = 1})
|
|
local condition_lua = _0_[1]
|
|
return compiler.emit(chunk, ("if %s then break end"):format(tostring(condition_lua)), condition)
|
|
end
|
|
end
|
|
SPECIALS.each = function(ast, scope, parent)
|
|
compiler.assert((#ast >= 3), "expected body expression", ast[1])
|
|
local binding = compiler.assert(utils["table?"](ast[2]), "expected binding table", ast)
|
|
local until_condition = remove_until_condition(binding)
|
|
local iter = table.remove(binding, #binding)
|
|
local destructures = {}
|
|
local new_manglings = {}
|
|
local sub_scope = compiler["make-scope"](scope)
|
|
local function destructure_binding(v)
|
|
if utils["sym?"](v) then
|
|
return compiler["declare-local"](v, {}, sub_scope, ast, new_manglings)
|
|
else
|
|
local raw = utils.sym(compiler.gensym(sub_scope))
|
|
destructures[raw] = v
|
|
return compiler["declare-local"](raw, {}, sub_scope, ast)
|
|
end
|
|
end
|
|
local bind_vars = utils.map(binding, destructure_binding)
|
|
local vals = compiler.compile1(iter, sub_scope, parent)
|
|
local val_names = utils.map(vals, tostring)
|
|
local chunk = {}
|
|
compiler.emit(parent, ("for %s in %s do"):format(table.concat(bind_vars, ", "), table.concat(val_names, ", ")), ast)
|
|
for raw, args in utils.stablepairs(destructures) do
|
|
compiler.destructure(args, raw, ast, sub_scope, chunk, {declaration = true, nomulti = true, symtype = "each"})
|
|
end
|
|
compiler["apply-manglings"](sub_scope, new_manglings, ast)
|
|
compile_until(until_condition, sub_scope, chunk)
|
|
compile_do(ast, sub_scope, chunk, 3)
|
|
compiler.emit(parent, chunk, ast)
|
|
return compiler.emit(parent, "end", ast)
|
|
end
|
|
doc_special("each", {"[key value (iterator)]", "..."}, "Runs the body once for each set of values provided by the given iterator.\nMost commonly used with ipairs for sequential tables or pairs for undefined\norder, but can be used with any iterator.")
|
|
local function while_2a(ast, scope, parent)
|
|
local len1 = #parent
|
|
local condition = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
|
|
local len2 = #parent
|
|
local sub_chunk = {}
|
|
if (len1 ~= len2) then
|
|
for i = (len1 + 1), len2 do
|
|
table.insert(sub_chunk, parent[i])
|
|
parent[i] = nil
|
|
end
|
|
compiler.emit(parent, "while true do", ast)
|
|
compiler.emit(sub_chunk, ("if not %s then break end"):format(condition[1]), ast)
|
|
else
|
|
compiler.emit(parent, ("while " .. tostring(condition) .. " do"), ast)
|
|
end
|
|
compile_do(ast, compiler["make-scope"](scope), sub_chunk, 3)
|
|
compiler.emit(parent, sub_chunk, ast)
|
|
return compiler.emit(parent, "end", ast)
|
|
end
|
|
SPECIALS["while"] = while_2a
|
|
doc_special("while", {"condition", "..."}, "The classic while loop. Evaluates body until a condition is non-truthy.")
|
|
local function for_2a(ast, scope, parent)
|
|
local ranges = compiler.assert(utils["table?"](ast[2]), "expected binding table", ast)
|
|
local until_condition = remove_until_condition(ast[2])
|
|
local binding_sym = table.remove(ast[2], 1)
|
|
local sub_scope = compiler["make-scope"](scope)
|
|
local range_args = {}
|
|
local chunk = {}
|
|
compiler.assert(utils["sym?"](binding_sym), ("unable to bind %s %s"):format(type(binding_sym), tostring(binding_sym)), ast[2])
|
|
compiler.assert((#ast >= 3), "expected body expression", ast[1])
|
|
for i = 1, math.min(#ranges, 3) do
|
|
range_args[i] = tostring(compiler.compile1(ranges[i], sub_scope, parent, {nval = 1})[1])
|
|
end
|
|
compiler.emit(parent, ("for %s = %s do"):format(compiler["declare-local"](binding_sym, {}, sub_scope, ast), table.concat(range_args, ", ")), ast)
|
|
compile_until(until_condition, sub_scope, chunk)
|
|
compile_do(ast, sub_scope, chunk, 3)
|
|
compiler.emit(parent, chunk, ast)
|
|
return compiler.emit(parent, "end", ast)
|
|
end
|
|
SPECIALS["for"] = for_2a
|
|
doc_special("for", {"[index start stop step?]", "..."}, "Numeric loop construct.\nEvaluates body once for each value between start and stop (inclusive).")
|
|
local function native_method_call(ast, _scope, _parent, target, args)
|
|
local _0_ = ast
|
|
local _ = _0_[1]
|
|
local _0 = _0_[2]
|
|
local method_string = _0_[3]
|
|
local call_string = nil
|
|
if ((target.type == "literal") or (target.type == "expression")) then
|
|
call_string = "(%s):%s(%s)"
|
|
else
|
|
call_string = "%s:%s(%s)"
|
|
end
|
|
return utils.expr(string.format(call_string, tostring(target), method_string, table.concat(args, ", ")), "statement")
|
|
end
|
|
local function nonnative_method_call(ast, scope, parent, target, args)
|
|
local method_string = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1])
|
|
local args0 = {tostring(target), unpack(args)}
|
|
return utils.expr(string.format("%s[%s](%s)", tostring(target), method_string, table.concat(args0, ", ")), "statement")
|
|
end
|
|
local function double_eval_protected_method_call(ast, scope, parent, target, args)
|
|
local method_string = tostring(compiler.compile1(ast[3], scope, parent, {nval = 1})[1])
|
|
local call = "(function(tgt, m, ...) return tgt[m](tgt, ...) end)(%s, %s)"
|
|
table.insert(args, 1, method_string)
|
|
return utils.expr(string.format(call, tostring(target), table.concat(args, ", ")), "statement")
|
|
end
|
|
local function method_call(ast, scope, parent)
|
|
compiler.assert((2 < #ast), "expected at least 2 arguments", ast)
|
|
local _0_ = compiler.compile1(ast[2], scope, parent, {nval = 1})
|
|
local target = _0_[1]
|
|
local args = {}
|
|
for i = 4, #ast do
|
|
local subexprs = nil
|
|
local _1_
|
|
if (i ~= #ast) then
|
|
_1_ = 1
|
|
else
|
|
_1_ = nil
|
|
end
|
|
subexprs = compiler.compile1(ast[i], scope, parent, {nval = _1_})
|
|
utils.map(subexprs, tostring, args)
|
|
end
|
|
if ((type(ast[3]) == "string") and utils["valid-lua-identifier?"](ast[3])) then
|
|
return native_method_call(ast, scope, parent, target, args)
|
|
elseif (target.type == "sym") then
|
|
return nonnative_method_call(ast, scope, parent, target, args)
|
|
else
|
|
return double_eval_protected_method_call(ast, scope, parent, target, args)
|
|
end
|
|
end
|
|
SPECIALS[":"] = method_call
|
|
doc_special(":", {"tbl", "method-name", "..."}, "Call the named method on tbl with the provided args.\nMethod name doesn't have to be known at compile-time; if it is, use\n(tbl:method-name ...) instead.")
|
|
SPECIALS.comment = function(ast, _, parent)
|
|
local els = {}
|
|
for i = 2, #ast do
|
|
local function _1_()
|
|
local _0_0 = tostring(ast[i]):gsub("\n", " ")
|
|
return _0_0
|
|
end
|
|
table.insert(els, _1_())
|
|
end
|
|
return compiler.emit(parent, ("-- " .. table.concat(els, " ")), ast)
|
|
end
|
|
doc_special("comment", {"..."}, "Comment which will be emitted in Lua output.")
|
|
local function hashfn_max_used(f_scope, i, max)
|
|
local max0 = nil
|
|
if f_scope.symmeta[("$" .. i)].used then
|
|
max0 = i
|
|
else
|
|
max0 = max
|
|
end
|
|
if (i < 9) then
|
|
return hashfn_max_used(f_scope, (i + 1), max0)
|
|
else
|
|
return max0
|
|
end
|
|
end
|
|
SPECIALS.hashfn = function(ast, scope, parent)
|
|
compiler.assert((#ast == 2), "expected one argument", ast)
|
|
local f_scope = nil
|
|
do
|
|
local _0_0 = compiler["make-scope"](scope)
|
|
_0_0["vararg"] = false
|
|
_0_0["hashfn"] = true
|
|
f_scope = _0_0
|
|
end
|
|
local f_chunk = {}
|
|
local name = compiler.gensym(scope)
|
|
local symbol = utils.sym(name)
|
|
local args = {}
|
|
compiler["declare-local"](symbol, {}, scope, ast)
|
|
for i = 1, 9 do
|
|
args[i] = compiler["declare-local"](utils.sym(("$" .. i)), {}, f_scope, ast)
|
|
end
|
|
local function walker(idx, node, parent_node)
|
|
if (utils["sym?"](node) and (utils.deref(node) == "$...")) then
|
|
parent_node[idx] = utils.varg()
|
|
f_scope.vararg = true
|
|
return nil
|
|
else
|
|
return (utils["list?"](node) or utils["table?"](node))
|
|
end
|
|
end
|
|
utils["walk-tree"](ast[2], walker)
|
|
compiler.compile1(ast[2], f_scope, f_chunk, {tail = true})
|
|
local max_used = hashfn_max_used(f_scope, 1, 0)
|
|
if f_scope.vararg then
|
|
compiler.assert((max_used == 0), "$ and $... in hashfn are mutually exclusive", ast)
|
|
end
|
|
local arg_str = nil
|
|
if f_scope.vararg then
|
|
arg_str = utils.deref(utils.varg())
|
|
else
|
|
arg_str = table.concat(args, ", ", 1, max_used)
|
|
end
|
|
compiler.emit(parent, string.format("local function %s(%s)", name, arg_str), ast)
|
|
compiler.emit(parent, f_chunk, ast)
|
|
compiler.emit(parent, "end", ast)
|
|
return utils.expr(name, "sym")
|
|
end
|
|
doc_special("hashfn", {"..."}, "Function literal shorthand; args are either $... OR $1, $2, etc.")
|
|
local function arithmetic_special(name, zero_arity, unary_prefix, ast, scope, parent)
|
|
local len = #ast
|
|
if (len == 1) then
|
|
compiler.assert(zero_arity, "Expected more than 0 arguments", ast)
|
|
return utils.expr(zero_arity, "literal")
|
|
else
|
|
local operands = {}
|
|
local padded_op = (" " .. name .. " ")
|
|
for i = 2, len do
|
|
local subexprs = nil
|
|
local _0_
|
|
if (i ~= len) then
|
|
_0_ = 1
|
|
else
|
|
_0_ = nil
|
|
end
|
|
subexprs = compiler.compile1(ast[i], scope, parent, {nval = _0_})
|
|
utils.map(subexprs, tostring, operands)
|
|
end
|
|
if (#operands == 1) then
|
|
if unary_prefix then
|
|
return ("(" .. unary_prefix .. padded_op .. operands[1] .. ")")
|
|
else
|
|
return operands[1]
|
|
end
|
|
else
|
|
return ("(" .. table.concat(operands, padded_op) .. ")")
|
|
end
|
|
end
|
|
end
|
|
local function define_arithmetic_special(name, zero_arity, unary_prefix, lua_name)
|
|
local function _0_(...)
|
|
return arithmetic_special((lua_name or name), zero_arity, unary_prefix, ...)
|
|
end
|
|
SPECIALS[name] = _0_
|
|
return doc_special(name, {"a", "b", "..."}, "Arithmetic operator; works the same as Lua but accepts more arguments.")
|
|
end
|
|
define_arithmetic_special("+", "0")
|
|
define_arithmetic_special("..", "''")
|
|
define_arithmetic_special("^")
|
|
define_arithmetic_special("-", nil, "")
|
|
define_arithmetic_special("*", "1")
|
|
define_arithmetic_special("%")
|
|
define_arithmetic_special("/", nil, "1")
|
|
define_arithmetic_special("//", nil, "1")
|
|
local function bitop_special(native_name, lib_name, zero_arity, unary_prefix, ast, scope, parent)
|
|
if (#ast == 1) then
|
|
return compiler.assert(zero_arity, "Expected more than 0 arguments.", ast)
|
|
else
|
|
local len = #ast
|
|
local operands = {}
|
|
local padded_native_name = (" " .. native_name .. " ")
|
|
local prefixed_lib_name = ("bit." .. lib_name)
|
|
for i = 2, len do
|
|
local subexprs = nil
|
|
local _0_
|
|
if (i ~= len) then
|
|
_0_ = 1
|
|
else
|
|
_0_ = nil
|
|
end
|
|
subexprs = compiler.compile1(ast[i], scope, parent, {nval = _0_})
|
|
utils.map(subexprs, tostring, operands)
|
|
end
|
|
if (#operands == 1) then
|
|
if utils.root.options.useBitLib then
|
|
return (prefixed_lib_name .. "(" .. unary_prefix .. ", " .. operands[1] .. ")")
|
|
else
|
|
return ("(" .. unary_prefix .. padded_native_name .. operands[1] .. ")")
|
|
end
|
|
else
|
|
if utils.root.options.useBitLib then
|
|
return (prefixed_lib_name .. "(" .. table.concat(operands, ", ") .. ")")
|
|
else
|
|
return ("(" .. table.concat(operands, padded_native_name) .. ")")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
local function define_bitop_special(name, zero_arity, unary_prefix, native)
|
|
local function _0_(...)
|
|
return bitop_special(native, name, zero_arity, unary_prefix, ...)
|
|
end
|
|
SPECIALS[name] = _0_
|
|
return nil
|
|
end
|
|
define_bitop_special("lshift", nil, "1", "<<")
|
|
define_bitop_special("rshift", nil, "1", ">>")
|
|
define_bitop_special("band", "0", "0", "&")
|
|
define_bitop_special("bor", "0", "0", "|")
|
|
define_bitop_special("bxor", "0", "0", "~")
|
|
doc_special("lshift", {"x", "n"}, "Bitwise logical left shift of x by n bits.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
|
|
doc_special("rshift", {"x", "n"}, "Bitwise logical right shift of x by n bits.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
|
|
doc_special("band", {"x1", "x2", "..."}, "Bitwise AND of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
|
|
doc_special("bor", {"x1", "x2", "..."}, "Bitwise OR of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
|
|
doc_special("bxor", {"x1", "x2", "..."}, "Bitwise XOR of any number of arguments.\nOnly works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
|
|
define_arithmetic_special("or", "false")
|
|
define_arithmetic_special("and", "true")
|
|
doc_special("and", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.")
|
|
doc_special("or", {"a", "b", "..."}, "Boolean operator; works the same as Lua but accepts more arguments.")
|
|
doc_special("..", {"a", "b", "..."}, "String concatenation operator; works the same as Lua but accepts more arguments.")
|
|
local function native_comparator(op, _0_0, scope, parent)
|
|
local _1_ = _0_0
|
|
local _ = _1_[1]
|
|
local lhs_ast = _1_[2]
|
|
local rhs_ast = _1_[3]
|
|
local _2_ = compiler.compile1(lhs_ast, scope, parent, {nval = 1})
|
|
local lhs = _2_[1]
|
|
local _3_ = compiler.compile1(rhs_ast, scope, parent, {nval = 1})
|
|
local rhs = _3_[1]
|
|
return string.format("(%s %s %s)", tostring(lhs), op, tostring(rhs))
|
|
end
|
|
local function double_eval_protected_comparator(op, chain_op, ast, scope, parent)
|
|
local arglist = {}
|
|
local comparisons = {}
|
|
local vals = {}
|
|
local chain = string.format(" %s ", (chain_op or "and"))
|
|
for i = 2, #ast do
|
|
table.insert(arglist, tostring(compiler.gensym(scope)))
|
|
table.insert(vals, tostring(compiler.compile1(ast[i], scope, parent, {nval = 1})[1]))
|
|
end
|
|
for i = 1, (#arglist - 1) do
|
|
table.insert(comparisons, string.format("(%s %s %s)", arglist[i], op, arglist[(i + 1)]))
|
|
end
|
|
return string.format("(function(%s) return %s end)(%s)", table.concat(arglist, ","), table.concat(comparisons, chain), table.concat(vals, ","))
|
|
end
|
|
local function define_comparator_special(name, lua_op, chain_op)
|
|
do
|
|
local op = (lua_op or name)
|
|
local function opfn(ast, scope, parent)
|
|
compiler.assert((2 < #ast), "expected at least two arguments", ast)
|
|
if (3 == #ast) then
|
|
return native_comparator(op, ast, scope, parent)
|
|
else
|
|
return double_eval_protected_comparator(op, chain_op, ast, scope, parent)
|
|
end
|
|
end
|
|
SPECIALS[name] = opfn
|
|
end
|
|
return doc_special(name, {"a", "b", "..."}, "Comparison operator; works the same as Lua but accepts more arguments.")
|
|
end
|
|
define_comparator_special(">")
|
|
define_comparator_special("<")
|
|
define_comparator_special(">=")
|
|
define_comparator_special("<=")
|
|
define_comparator_special("=", "==")
|
|
define_comparator_special("not=", "~=", "or")
|
|
local function define_unary_special(op, realop)
|
|
local function opfn(ast, scope, parent)
|
|
compiler.assert((#ast == 2), "expected one argument", ast)
|
|
local tail = compiler.compile1(ast[2], scope, parent, {nval = 1})
|
|
return ((realop or op) .. tostring(tail[1]))
|
|
end
|
|
SPECIALS[op] = opfn
|
|
return nil
|
|
end
|
|
define_unary_special("not", "not ")
|
|
doc_special("not", {"x"}, "Logical operator; works the same as Lua.")
|
|
define_unary_special("bnot", "~")
|
|
doc_special("bnot", {"x"}, "Bitwise negation; only works in Lua 5.3+ or LuaJIT with the --use-bit-lib flag.")
|
|
define_unary_special("length", "#")
|
|
doc_special("length", {"x"}, "Returns the length of a table or string.")
|
|
SPECIALS["~="] = SPECIALS["not="]
|
|
SPECIALS["#"] = SPECIALS.length
|
|
SPECIALS.quote = function(ast, scope, parent)
|
|
compiler.assert((#ast == 2), "expected one argument")
|
|
local runtime, this_scope = true, scope
|
|
while this_scope do
|
|
this_scope = this_scope.parent
|
|
if (this_scope == compiler.scopes.compiler) then
|
|
runtime = false
|
|
end
|
|
end
|
|
return compiler["do-quote"](ast[2], scope, parent, runtime)
|
|
end
|
|
doc_special("quote", {"x"}, "Quasiquote the following form. Only works in macro/compiler scope.")
|
|
local already_warned_3f = {}
|
|
local compile_env_warning = table.concat({"WARNING: Attempting to %s %s in compile scope.", "In future versions of Fennel this will not be allowed without the", "--no-compiler-sandbox flag or passing a :compilerEnv globals table", "in the options.\n"}, "\n")
|
|
local function compiler_env_warn(_, key)
|
|
local v = _G[key]
|
|
if (v and io and io.stderr and not already_warned_3f[key]) then
|
|
already_warned_3f[key] = true
|
|
do end (io.stderr):write(compile_env_warning:format("use global", key))
|
|
end
|
|
return v
|
|
end
|
|
local function safe_getmetatable(tbl)
|
|
local mt = getmetatable(tbl)
|
|
assert((mt ~= getmetatable("")), "Illegal metatable access!")
|
|
return mt
|
|
end
|
|
local safe_require = nil
|
|
local function safe_compiler_env(strict_3f)
|
|
local _1_
|
|
if strict_3f then
|
|
_1_ = nil
|
|
else
|
|
_1_ = compiler_env_warn
|
|
end
|
|
return setmetatable({assert = assert, bit = rawget(_G, "bit"), error = error, getmetatable = safe_getmetatable, ipairs = ipairs, math = utils.copy(math), next = next, pairs = pairs, pcall = pcall, print = print, rawequal = rawequal, rawget = rawget, rawlen = rawget(_G, "rawlen"), rawset = rawset, require = safe_require, select = select, setmetatable = setmetatable, string = utils.copy(string), table = utils.copy(table), tonumber = tonumber, tostring = tostring, type = type, xpcall = xpcall}, {__index = _1_})
|
|
end
|
|
local function make_compiler_env(ast, scope, parent, strict_3f)
|
|
local function _1_()
|
|
return compiler.scopes.macro
|
|
end
|
|
local function _2_(symbol)
|
|
compiler.assert(compiler.scopes.macro, "must call from macro", ast)
|
|
return compiler.scopes.macro.manglings[tostring(symbol)]
|
|
end
|
|
local function _3_(base)
|
|
return utils.sym(compiler.gensym((compiler.scopes.macro or scope), base))
|
|
end
|
|
local function _4_(form)
|
|
compiler.assert(compiler.scopes.macro, "must call from macro", ast)
|
|
return compiler.macroexpand(form, compiler.scopes.macro)
|
|
end
|
|
local _6_
|
|
do
|
|
local _5_0 = utils.root.options
|
|
if ((type(_5_0) == "table") and (_5_0["compiler-env"] == "strict")) then
|
|
_6_ = safe_compiler_env(true)
|
|
elseif ((type(_5_0) == "table") and (nil ~= _5_0.compilerEnv)) then
|
|
local compilerEnv = _5_0.compilerEnv
|
|
_6_ = compilerEnv
|
|
elseif ((type(_5_0) == "table") and (nil ~= _5_0["compiler-env"])) then
|
|
local compiler_env = _5_0["compiler-env"]
|
|
_6_ = compiler_env
|
|
else
|
|
local _ = _5_0
|
|
_6_ = safe_compiler_env(false)
|
|
end
|
|
end
|
|
return setmetatable({["assert-compile"] = compiler.assert, ["get-scope"] = _1_, ["in-scope?"] = _2_, ["list?"] = utils["list?"], ["multi-sym?"] = utils["multi-sym?"], ["sequence?"] = utils["sequence?"], ["sym?"] = utils["sym?"], ["table?"] = utils["table?"], ["varg?"] = utils["varg?"], _AST = ast, _CHUNK = parent, _IS_COMPILER = true, _SCOPE = scope, _SPECIALS = compiler.scopes.global.specials, _VARARG = utils.varg(), gensym = _3_, list = utils.list, macroexpand = _4_, sequence = utils.sequence, sym = utils.sym, unpack = unpack, view = view}, {__index = _6_})
|
|
end
|
|
local cfg = string.gmatch(package.config, "([^\n]+)")
|
|
local dirsep, pathsep, pathmark = (cfg() or "/"), (cfg() or ";"), (cfg() or "?")
|
|
local pkg_config = {dirsep = dirsep, pathmark = pathmark, pathsep = pathsep}
|
|
local function escapepat(str)
|
|
return string.gsub(str, "[^%w]", "%%%1")
|
|
end
|
|
local function search_module(modulename, pathstring)
|
|
local pathsepesc = escapepat(pkg_config.pathsep)
|
|
local pattern = ("([^%s]*)%s"):format(pathsepesc, pathsepesc)
|
|
local no_dot_module = modulename:gsub("%.", pkg_config.dirsep)
|
|
local fullpath = ((pathstring or utils["fennel-module"].path) .. pkg_config.pathsep)
|
|
local function try_path(path)
|
|
local filename = path:gsub(escapepat(pkg_config.pathmark), no_dot_module)
|
|
local filename2 = path:gsub(escapepat(pkg_config.pathmark), modulename)
|
|
local _1_0 = (io.open(filename) or io.open(filename2))
|
|
if (nil ~= _1_0) then
|
|
local file = _1_0
|
|
file:close()
|
|
return filename
|
|
end
|
|
end
|
|
local function find_in_path(start)
|
|
local _1_0 = fullpath:match(pattern, start)
|
|
if (nil ~= _1_0) then
|
|
local path = _1_0
|
|
return (try_path(path) or find_in_path((start + #path + 1)))
|
|
end
|
|
end
|
|
return find_in_path(1)
|
|
end
|
|
local function make_searcher(options)
|
|
local function _1_(module_name)
|
|
local opts = utils.copy(utils.root.options)
|
|
for k, v in pairs((options or {})) do
|
|
opts[k] = v
|
|
end
|
|
opts["module-name"] = module_name
|
|
local _2_0 = search_module(module_name)
|
|
if (nil ~= _2_0) then
|
|
local filename = _2_0
|
|
local function _3_(...)
|
|
return utils["fennel-module"].dofile(filename, opts, ...)
|
|
end
|
|
return _3_, filename
|
|
end
|
|
end
|
|
return _1_
|
|
end
|
|
local function macro_globals(env, globals)
|
|
local allowed = current_global_names(env)
|
|
for _, k in pairs((globals or {})) do
|
|
table.insert(allowed, k)
|
|
end
|
|
return allowed
|
|
end
|
|
local function default_macro_searcher(module_name)
|
|
local _1_0 = search_module(module_name)
|
|
if (nil ~= _1_0) then
|
|
local filename = _1_0
|
|
local function _2_(...)
|
|
return utils["fennel-module"].dofile(filename, {env = "_COMPILER"}, ...)
|
|
end
|
|
return _2_, filename
|
|
end
|
|
end
|
|
local macro_searchers = {default_macro_searcher}
|
|
local function search_macro_module(modname, n)
|
|
local _1_0 = macro_searchers[n]
|
|
if (nil ~= _1_0) then
|
|
local f = _1_0
|
|
local _2_0, _3_0 = f(modname)
|
|
if ((nil ~= _2_0) and true) then
|
|
local loader = _2_0
|
|
local _3ffilename = _3_0
|
|
return loader, _3ffilename
|
|
else
|
|
local _ = _2_0
|
|
return search_macro_module(modname, (n + 1))
|
|
end
|
|
end
|
|
end
|
|
local macro_loaded = {}
|
|
local function metadata_only_fennel(modname)
|
|
if ((modname == "fennel.macros") or (package and package.loaded and ("table" == type(package.loaded[modname])) and (package.loaded[modname].metadata == compiler.metadata))) then
|
|
return {metadata = compiler.metadata}
|
|
end
|
|
end
|
|
local function _1_(modname)
|
|
local function _2_()
|
|
local loader, filename = search_macro_module(modname, 1)
|
|
compiler.assert(loader, (modname .. " module not found."))
|
|
macro_loaded[modname] = loader(modname, filename)
|
|
return macro_loaded[modname]
|
|
end
|
|
return (macro_loaded[modname] or metadata_only_fennel(modname) or _2_())
|
|
end
|
|
safe_require = _1_
|
|
local function add_macros(macros_2a, ast, scope)
|
|
compiler.assert(utils["table?"](macros_2a), "expected macros to be table", ast)
|
|
for k, v in pairs(macros_2a) do
|
|
compiler.assert((type(v) == "function"), "expected each macro to be function", ast)
|
|
scope.macros[k] = v
|
|
end
|
|
return nil
|
|
end
|
|
SPECIALS["require-macros"] = function(ast, scope, parent, real_ast)
|
|
compiler.assert((#ast == 2), "Expected one module name argument", (real_ast or ast))
|
|
local filename = (ast[2].filename or ast.filename)
|
|
local modname_chunk = load_code(compiler.compile(ast[2]), nil, filename)
|
|
local modname = modname_chunk(utils.root.options["module-name"], filename)
|
|
compiler.assert((type(modname) == "string"), "module name must compile to string", (real_ast or ast))
|
|
if not macro_loaded[modname] then
|
|
local env = make_compiler_env(ast, scope, parent)
|
|
local loader, filename0 = search_macro_module(modname, 1)
|
|
compiler.assert(loader, (modname .. " module not found."), ast)
|
|
macro_loaded[modname] = loader(modname, filename0)
|
|
end
|
|
return add_macros(macro_loaded[modname], ast, scope, parent)
|
|
end
|
|
doc_special("require-macros", {"macro-module-name"}, "Load given module and use its contents as macro definitions in current scope.\nMacro module should return a table of macro functions with string keys.\nConsider using import-macros instead as it is more flexible.")
|
|
local function emit_included_fennel(src, path, opts, sub_chunk)
|
|
local subscope = compiler["make-scope"](utils.root.scope.parent)
|
|
local forms = {}
|
|
if utils.root.options.requireAsInclude then
|
|
subscope.specials.require = compiler["require-include"]
|
|
end
|
|
for _, val in parser.parser(parser["string-stream"](src), path) do
|
|
table.insert(forms, val)
|
|
end
|
|
for i = 1, #forms do
|
|
local subopts = nil
|
|
if (i == #forms) then
|
|
subopts = {tail = true}
|
|
else
|
|
subopts = {nval = 0}
|
|
end
|
|
utils["propagate-options"](opts, subopts)
|
|
compiler.compile1(forms[i], subscope, sub_chunk, subopts)
|
|
end
|
|
return nil
|
|
end
|
|
local function include_path(ast, opts, path, mod, fennel_3f)
|
|
utils.root.scope.includes[mod] = "fnl/loading"
|
|
local src = nil
|
|
do
|
|
local f = assert(io.open(path))
|
|
local function close_handlers_0_(ok_0_, ...)
|
|
f:close()
|
|
if ok_0_ then
|
|
return ...
|
|
else
|
|
return error(..., 0)
|
|
end
|
|
end
|
|
local function _2_()
|
|
return f:read("*all"):gsub("[\13\n]*$", "")
|
|
end
|
|
src = close_handlers_0_(xpcall(_2_, (package.loaded.fennel or debug).traceback))
|
|
end
|
|
local ret = utils.expr(("require(\"" .. mod .. "\")"), "statement")
|
|
local target = ("package.preload[%q]"):format(mod)
|
|
local preload_str = (target .. " = " .. target .. " or function(...)")
|
|
local temp_chunk, sub_chunk = {}, {}
|
|
compiler.emit(temp_chunk, preload_str, ast)
|
|
compiler.emit(temp_chunk, sub_chunk)
|
|
compiler.emit(temp_chunk, "end", ast)
|
|
for i, v in ipairs(temp_chunk) do
|
|
table.insert(utils.root.chunk, i, v)
|
|
end
|
|
if fennel_3f then
|
|
emit_included_fennel(src, path, opts, sub_chunk)
|
|
else
|
|
compiler.emit(sub_chunk, src, ast)
|
|
end
|
|
utils.root.scope.includes[mod] = ret
|
|
return ret
|
|
end
|
|
local function include_circular_fallback(mod, modexpr, fallback, ast)
|
|
if (utils.root.scope.includes[mod] == "fnl/loading") then
|
|
compiler.assert(fallback, "circular include detected", ast)
|
|
return fallback(modexpr)
|
|
end
|
|
end
|
|
SPECIALS.include = function(ast, scope, parent, opts)
|
|
compiler.assert((#ast == 2), "expected one argument", ast)
|
|
local modexpr = compiler.compile1(ast[2], scope, parent, {nval = 1})[1]
|
|
if ((modexpr.type ~= "literal") or ((modexpr[1]):byte() ~= 34)) then
|
|
if opts.fallback then
|
|
return opts.fallback(modexpr)
|
|
else
|
|
return compiler.assert(false, "module name must be string literal", ast)
|
|
end
|
|
else
|
|
local mod = load_code(("return " .. modexpr[1]))()
|
|
local function _3_()
|
|
local _2_0 = search_module(mod)
|
|
if (nil ~= _2_0) then
|
|
local fennel_path = _2_0
|
|
return include_path(ast, opts, fennel_path, mod, true)
|
|
else
|
|
local _ = _2_0
|
|
local lua_path = search_module(mod, package.path)
|
|
if lua_path then
|
|
return include_path(ast, opts, lua_path, mod, false)
|
|
elseif opts.fallback then
|
|
return opts.fallback(modexpr)
|
|
else
|
|
return compiler.assert(false, ("module not found " .. mod), ast)
|
|
end
|
|
end
|
|
end
|
|
return (include_circular_fallback(mod, modexpr, opts.fallback, ast) or utils.root.scope.includes[mod] or _3_())
|
|
end
|
|
end
|
|
doc_special("include", {"module-name-literal"}, "Like require but load the target module during compilation and embed it in the\nLua output. The module must be a string literal and resolvable at compile time.")
|
|
local function eval_compiler_2a(ast, scope, parent)
|
|
local env = make_compiler_env(ast, scope, parent)
|
|
local opts = utils.copy(utils.root.options)
|
|
opts.scope = compiler["make-scope"](compiler.scopes.compiler)
|
|
opts.allowedGlobals = macro_globals(env, current_global_names())
|
|
return load_code(compiler.compile(ast, opts), wrap_env(env))(opts["module-name"], ast.filename)
|
|
end
|
|
SPECIALS.macros = function(ast, scope, parent)
|
|
compiler.assert((#ast == 2), "Expected one table argument", ast)
|
|
return add_macros(eval_compiler_2a(ast[2], scope, parent), ast, scope, parent)
|
|
end
|
|
doc_special("macros", {"{:macro-name-1 (fn [...] ...) ... :macro-name-N macro-body-N}"}, "Define all functions in the given table as macros local to the current scope.")
|
|
SPECIALS["eval-compiler"] = function(ast, scope, parent)
|
|
local old_first = ast[1]
|
|
ast[1] = utils.sym("do")
|
|
local val = eval_compiler_2a(ast, scope, parent)
|
|
ast[1] = old_first
|
|
return val
|
|
end
|
|
doc_special("eval-compiler", {"..."}, "Evaluate the body at compile-time. Use the macro system instead if possible.")
|
|
return {["current-global-names"] = current_global_names, ["load-code"] = load_code, ["macro-loaded"] = macro_loaded, ["macro-searchers"] = macro_searchers, ["make-compiler-env"] = make_compiler_env, ["make-searcher"] = make_searcher, ["search-module"] = search_module, ["wrap-env"] = wrap_env, doc = doc_2a}
|
|
end
|
|
package.preload["fennel.compiler"] = package.preload["fennel.compiler"] or function(...)
|
|
local utils = require("fennel.utils")
|
|
local parser = require("fennel.parser")
|
|
local friend = require("fennel.friend")
|
|
local unpack = (table.unpack or _G.unpack)
|
|
local scopes = {}
|
|
local function make_scope(parent)
|
|
local parent0 = (parent or scopes.global)
|
|
local _0_
|
|
if parent0 then
|
|
_0_ = ((parent0.depth or 0) + 1)
|
|
else
|
|
_0_ = 0
|
|
end
|
|
return {autogensyms = {}, depth = _0_, hashfn = (parent0 and parent0.hashfn), includes = setmetatable({}, {__index = (parent0 and parent0.includes)}), macros = setmetatable({}, {__index = (parent0 and parent0.macros)}), manglings = setmetatable({}, {__index = (parent0 and parent0.manglings)}), parent = parent0, refedglobals = setmetatable({}, {__index = (parent0 and parent0.refedglobals)}), specials = setmetatable({}, {__index = (parent0 and parent0.specials)}), symmeta = setmetatable({}, {__index = (parent0 and parent0.symmeta)}), unmanglings = setmetatable({}, {__index = (parent0 and parent0.unmanglings)}), vararg = (parent0 and parent0.vararg)}
|
|
end
|
|
local function assert_msg(ast, msg)
|
|
local ast_tbl = nil
|
|
if ("table" == type(ast)) then
|
|
ast_tbl = ast
|
|
else
|
|
ast_tbl = {}
|
|
end
|
|
local m = getmetatable(ast)
|
|
local filename = ((m and m.filename) or ast_tbl.filename or "unknown")
|
|
local line = ((m and m.line) or ast_tbl.line or "?")
|
|
local target = nil
|
|
local function _1_()
|
|
if utils["sym?"](ast_tbl[1]) then
|
|
return utils.deref(ast_tbl[1])
|
|
else
|
|
return (ast_tbl[1] or "()")
|
|
end
|
|
end
|
|
target = tostring(_1_())
|
|
return string.format("Compile error in '%s' %s:%s: %s", target, filename, line, msg)
|
|
end
|
|
local function assert_compile(condition, msg, ast)
|
|
if not condition then
|
|
local _0_ = (utils.root.options or {})
|
|
local source = _0_["source"]
|
|
local unfriendly = _0_["unfriendly"]
|
|
utils.root.reset()
|
|
if unfriendly then
|
|
error(assert_msg(ast, msg), 0)
|
|
else
|
|
friend["assert-compile"](condition, msg, ast, source)
|
|
end
|
|
end
|
|
return condition
|
|
end
|
|
scopes.global = make_scope()
|
|
scopes.global.vararg = true
|
|
scopes.compiler = make_scope(scopes.global)
|
|
scopes.macro = scopes.global
|
|
local serialize_subst = {["\11"] = "\\v", ["\12"] = "\\f", ["\7"] = "\\a", ["\8"] = "\\b", ["\9"] = "\\t", ["\n"] = "n"}
|
|
local function serialize_string(str)
|
|
local function _0_(_241)
|
|
return ("\\" .. _241:byte())
|
|
end
|
|
return string.gsub(string.gsub(string.format("%q", str), ".", serialize_subst), "[\128-\255]", _0_)
|
|
end
|
|
local function global_mangling(str)
|
|
if utils["valid-lua-identifier?"](str) then
|
|
return str
|
|
else
|
|
local function _0_(_241)
|
|
return string.format("_%02x", _241:byte())
|
|
end
|
|
return ("__fnl_global__" .. str:gsub("[^%w]", _0_))
|
|
end
|
|
end
|
|
local function global_unmangling(identifier)
|
|
local _0_0 = string.match(identifier, "^__fnl_global__(.*)$")
|
|
if (nil ~= _0_0) then
|
|
local rest = _0_0
|
|
local _1_0 = nil
|
|
local function _2_(_241)
|
|
return string.char(tonumber(_241:sub(2), 16))
|
|
end
|
|
_1_0 = string.gsub(rest, "_[%da-f][%da-f]", _2_)
|
|
return _1_0
|
|
else
|
|
local _ = _0_0
|
|
return identifier
|
|
end
|
|
end
|
|
local allowed_globals = nil
|
|
local function global_allowed(name)
|
|
return (not allowed_globals or utils["member?"](name, allowed_globals))
|
|
end
|
|
local function unique_mangling(original, mangling, scope, append)
|
|
if scope.unmanglings[mangling] then
|
|
return unique_mangling(original, (original .. append), scope, (append + 1))
|
|
else
|
|
return mangling
|
|
end
|
|
end
|
|
local function local_mangling(str, scope, ast, temp_manglings)
|
|
assert_compile(not utils["multi-sym?"](str), ("unexpected multi symbol " .. str), ast)
|
|
local raw = nil
|
|
if (utils["lua-keywords"][str] or str:match("^%d")) then
|
|
raw = ("_" .. str)
|
|
else
|
|
raw = str
|
|
end
|
|
local mangling = nil
|
|
local function _1_(_241)
|
|
return string.format("_%02x", _241:byte())
|
|
end
|
|
mangling = string.gsub(string.gsub(raw, "-", "_"), "[^%w_]", _1_)
|
|
local unique = unique_mangling(mangling, mangling, scope, 0)
|
|
scope.unmanglings[unique] = str
|
|
do
|
|
local manglings = (temp_manglings or scope.manglings)
|
|
manglings[str] = unique
|
|
end
|
|
return unique
|
|
end
|
|
local function apply_manglings(scope, new_manglings, ast)
|
|
for raw, mangled in pairs(new_manglings) do
|
|
assert_compile(not scope.refedglobals[mangled], ("use of global " .. raw .. " is aliased by a local"), ast)
|
|
scope.manglings[raw] = mangled
|
|
end
|
|
return nil
|
|
end
|
|
local function combine_parts(parts, scope)
|
|
local ret = (scope.manglings[parts[1]] or global_mangling(parts[1]))
|
|
for i = 2, #parts do
|
|
if utils["valid-lua-identifier?"](parts[i]) then
|
|
if (parts["multi-sym-method-call"] and (i == #parts)) then
|
|
ret = (ret .. ":" .. parts[i])
|
|
else
|
|
ret = (ret .. "." .. parts[i])
|
|
end
|
|
else
|
|
ret = (ret .. "[" .. serialize_string(parts[i]) .. "]")
|
|
end
|
|
end
|
|
return ret
|
|
end
|
|
local function gensym(scope, base)
|
|
local append, mangling = 0, ((base or "") .. "_0_")
|
|
while scope.unmanglings[mangling] do
|
|
mangling = ((base or "") .. "_" .. append .. "_")
|
|
append = (append + 1)
|
|
end
|
|
scope.unmanglings[mangling] = (base or true)
|
|
return mangling
|
|
end
|
|
local function autogensym(base, scope)
|
|
local _0_0 = utils["multi-sym?"](base)
|
|
if (nil ~= _0_0) then
|
|
local parts = _0_0
|
|
parts[1] = autogensym(parts[1], scope)
|
|
return table.concat(parts, ((parts["multi-sym-method-call"] and ":") or "."))
|
|
else
|
|
local _ = _0_0
|
|
local function _1_()
|
|
local mangling = gensym(scope, base:sub(1, ( - 2)))
|
|
scope.autogensyms[base] = mangling
|
|
return mangling
|
|
end
|
|
return (scope.autogensyms[base] or _1_())
|
|
end
|
|
end
|
|
local already_warned = {}
|
|
local function check_binding_valid(symbol, scope, ast)
|
|
local name = utils.deref(symbol)
|
|
if (io and io.stderr and name:find("&") and not already_warned[symbol]) then
|
|
already_warned[symbol] = true
|
|
do end (io.stderr):write(("-- Warning: & will not be allowed in identifier names in " .. "future versions: " .. (symbol.filename or "unknown") .. ":" .. (symbol.line or "?") .. "\n"))
|
|
end
|
|
assert_compile(not (scope.specials[name] or scope.macros[name]), ("local %s was overshadowed by a special form or macro"):format(name), ast)
|
|
return assert_compile(not utils["quoted?"](symbol), string.format("macro tried to bind %s without gensym", name), symbol)
|
|
end
|
|
local function declare_local(symbol, meta, scope, ast, temp_manglings)
|
|
check_binding_valid(symbol, scope, ast)
|
|
local name = utils.deref(symbol)
|
|
assert_compile(not utils["multi-sym?"](name), ("unexpected multi symbol " .. name), ast)
|
|
scope.symmeta[name] = meta
|
|
return local_mangling(name, scope, ast, temp_manglings)
|
|
end
|
|
local function hashfn_arg_name(name, multi_sym_parts, scope)
|
|
if not scope.hashfn then
|
|
return nil
|
|
elseif (name == "$") then
|
|
return "$1"
|
|
elseif multi_sym_parts then
|
|
if (multi_sym_parts and (multi_sym_parts[1] == "$")) then
|
|
multi_sym_parts[1] = "$1"
|
|
end
|
|
return table.concat(multi_sym_parts, ".")
|
|
end
|
|
end
|
|
local function symbol_to_expression(symbol, scope, reference_3f)
|
|
utils.hook("symbol-to-expression", symbol, scope, reference_3f)
|
|
local name = symbol[1]
|
|
local multi_sym_parts = utils["multi-sym?"](name)
|
|
local name0 = (hashfn_arg_name(name, multi_sym_parts, scope) or name)
|
|
local parts = (multi_sym_parts or {name0})
|
|
local etype = (((#parts > 1) and "expression") or "sym")
|
|
local local_3f = scope.manglings[parts[1]]
|
|
if (local_3f and scope.symmeta[parts[1]]) then
|
|
scope.symmeta[parts[1]]["used"] = true
|
|
end
|
|
assert_compile((not reference_3f or local_3f or global_allowed(parts[1])), ("unknown global in strict mode: " .. tostring(parts[1])), symbol)
|
|
if (allowed_globals and not local_3f) then
|
|
utils.root.scope.refedglobals[parts[1]] = true
|
|
end
|
|
return utils.expr(combine_parts(parts, scope), etype)
|
|
end
|
|
local function emit(chunk, out, ast)
|
|
if (type(out) == "table") then
|
|
return table.insert(chunk, out)
|
|
else
|
|
return table.insert(chunk, {ast = ast, leaf = out})
|
|
end
|
|
end
|
|
local function peephole(chunk)
|
|
if chunk.leaf then
|
|
return chunk
|
|
elseif ((#chunk >= 3) and (chunk[(#chunk - 2)].leaf == "do") and not chunk[(#chunk - 1)].leaf and (chunk[#chunk].leaf == "end")) then
|
|
local kid = peephole(chunk[(#chunk - 1)])
|
|
local new_chunk = {ast = chunk.ast}
|
|
for i = 1, (#chunk - 3) do
|
|
table.insert(new_chunk, peephole(chunk[i]))
|
|
end
|
|
for i = 1, #kid do
|
|
table.insert(new_chunk, kid[i])
|
|
end
|
|
return new_chunk
|
|
else
|
|
return utils.map(chunk, peephole)
|
|
end
|
|
end
|
|
local function ast_source(ast)
|
|
local m = getmetatable(ast)
|
|
return ((m and m.line and m) or (("table" == type(ast)) and ast) or {})
|
|
end
|
|
local function flatten_chunk_correlated(main_chunk)
|
|
local function flatten(chunk, out, last_line, file)
|
|
local last_line0 = last_line
|
|
if chunk.leaf then
|
|
out[last_line0] = ((out[last_line0] or "") .. " " .. chunk.leaf)
|
|
else
|
|
for _, subchunk in ipairs(chunk) do
|
|
if (subchunk.leaf or (#subchunk > 0)) then
|
|
local source = ast_source(subchunk.ast)
|
|
if (file == source.file) then
|
|
last_line0 = math.max(last_line0, (source.line or 0))
|
|
end
|
|
last_line0 = flatten(subchunk, out, last_line0, file)
|
|
end
|
|
end
|
|
end
|
|
return last_line0
|
|
end
|
|
local out = {}
|
|
local last = flatten(main_chunk, out, 1, main_chunk.file)
|
|
for i = 1, last do
|
|
if (out[i] == nil) then
|
|
out[i] = ""
|
|
end
|
|
end
|
|
return table.concat(out, "\n")
|
|
end
|
|
local function flatten_chunk(sm, chunk, tab, depth)
|
|
if chunk.leaf then
|
|
local code = chunk.leaf
|
|
local info = chunk.ast
|
|
if sm then
|
|
table.insert(sm, {(info and info.filename), (info and info.line)})
|
|
end
|
|
return code
|
|
else
|
|
local tab0 = nil
|
|
do
|
|
local _0_0 = tab
|
|
if (_0_0 == true) then
|
|
tab0 = " "
|
|
elseif (_0_0 == false) then
|
|
tab0 = ""
|
|
elseif (_0_0 == tab) then
|
|
tab0 = tab
|
|
elseif (_0_0 == nil) then
|
|
tab0 = ""
|
|
else
|
|
tab0 = nil
|
|
end
|
|
end
|
|
local function parter(c)
|
|
if (c.leaf or (#c > 0)) then
|
|
local sub = flatten_chunk(sm, c, tab0, (depth + 1))
|
|
if (depth > 0) then
|
|
return (tab0 .. sub:gsub("\n", ("\n" .. tab0)))
|
|
else
|
|
return sub
|
|
end
|
|
end
|
|
end
|
|
return table.concat(utils.map(chunk, parter), "\n")
|
|
end
|
|
end
|
|
local fennel_sourcemap = {}
|
|
local function make_short_src(source)
|
|
local source0 = source:gsub("\n", " ")
|
|
if (#source0 <= 49) then
|
|
return ("[fennel \"" .. source0 .. "\"]")
|
|
else
|
|
return ("[fennel \"" .. source0:sub(1, 46) .. "...\"]")
|
|
end
|
|
end
|
|
local function flatten(chunk, options)
|
|
local chunk0 = peephole(chunk)
|
|
if options.correlate then
|
|
return flatten_chunk_correlated(chunk0), {}
|
|
else
|
|
local sm = {}
|
|
local ret = flatten_chunk(sm, chunk0, options.indent, 0)
|
|
if sm then
|
|
sm.short_src = (options.filename or make_short_src((options.source or ret)))
|
|
if options.filename then
|
|
sm.key = ("@" .. options.filename)
|
|
else
|
|
sm.key = ret
|
|
end
|
|
fennel_sourcemap[sm.key] = sm
|
|
end
|
|
return ret, sm
|
|
end
|
|
end
|
|
local function make_metadata()
|
|
local function _0_(self, tgt, key)
|
|
if self[tgt] then
|
|
return self[tgt][key]
|
|
end
|
|
end
|
|
local function _1_(self, tgt, key, value)
|
|
self[tgt] = (self[tgt] or {})
|
|
self[tgt][key] = value
|
|
return tgt
|
|
end
|
|
local function _2_(self, tgt, ...)
|
|
local kv_len = select("#", ...)
|
|
local kvs = {...}
|
|
if ((kv_len % 2) ~= 0) then
|
|
error("metadata:setall() expected even number of k/v pairs")
|
|
end
|
|
self[tgt] = (self[tgt] or {})
|
|
for i = 1, kv_len, 2 do
|
|
self[tgt][kvs[i]] = kvs[(i + 1)]
|
|
end
|
|
return tgt
|
|
end
|
|
return setmetatable({}, {__index = {get = _0_, set = _1_, setall = _2_}, __mode = "k"})
|
|
end
|
|
local function exprs1(exprs)
|
|
return table.concat(utils.map(exprs, 1), ", ")
|
|
end
|
|
local function disambiguate_parens(code, chunk)
|
|
if ((code:byte() == 40) and (1 < #chunk)) then
|
|
return ("; " .. code)
|
|
else
|
|
return code
|
|
end
|
|
end
|
|
local function keep_side_effects(exprs, chunk, start, ast)
|
|
for j = (start or 1), #exprs do
|
|
local se = exprs[j]
|
|
if ((se.type == "expression") and (se[1] ~= "nil")) then
|
|
emit(chunk, string.format("do local _ = %s end", tostring(se)), ast)
|
|
elseif (se.type == "statement") then
|
|
emit(chunk, disambiguate_parens(tostring(se), chunk), ast)
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
local function handle_compile_opts(exprs, parent, opts, ast)
|
|
if opts.nval then
|
|
local n = opts.nval
|
|
local len = #exprs
|
|
if (n ~= len) then
|
|
if (len > n) then
|
|
keep_side_effects(exprs, parent, (n + 1), ast)
|
|
for i = (n + 1), len do
|
|
exprs[i] = nil
|
|
end
|
|
else
|
|
for i = (#exprs + 1), n do
|
|
exprs[i] = utils.expr("nil", "literal")
|
|
end
|
|
end
|
|
end
|
|
end
|
|
if opts.tail then
|
|
emit(parent, string.format("return %s", exprs1(exprs)), ast)
|
|
end
|
|
if opts.target then
|
|
local result = exprs1(exprs)
|
|
local function _2_()
|
|
if (result == "") then
|
|
return "nil"
|
|
else
|
|
return result
|
|
end
|
|
end
|
|
emit(parent, string.format("%s = %s", opts.target, _2_()), ast)
|
|
end
|
|
if (opts.tail or opts.target) then
|
|
return {returned = true}
|
|
else
|
|
local _3_0 = exprs
|
|
_3_0["returned"] = true
|
|
return _3_0
|
|
end
|
|
end
|
|
local function find_macro(ast, scope, multi_sym_parts)
|
|
local function find_in_table(t, i)
|
|
if (i <= #multi_sym_parts) then
|
|
return find_in_table((utils["table?"](t) and t[multi_sym_parts[i]]), (i + 1))
|
|
else
|
|
return t
|
|
end
|
|
end
|
|
local macro_2a = (utils["sym?"](ast[1]) and scope.macros[utils.deref(ast[1])])
|
|
if (not macro_2a and multi_sym_parts) then
|
|
local nested_macro = find_in_table(scope.macros, 1)
|
|
assert_compile((not scope.macros[multi_sym_parts[1]] or (type(nested_macro) == "function")), "macro not found in imported macro module", ast)
|
|
return nested_macro
|
|
else
|
|
return macro_2a
|
|
end
|
|
end
|
|
local function macroexpand_2a(ast, scope, once)
|
|
local _0_0 = nil
|
|
if utils["list?"](ast) then
|
|
_0_0 = find_macro(ast, scope, utils["multi-sym?"](ast[1]))
|
|
else
|
|
_0_0 = nil
|
|
end
|
|
if (_0_0 == false) then
|
|
return ast
|
|
elseif (nil ~= _0_0) then
|
|
local macro_2a = _0_0
|
|
local old_scope = scopes.macro
|
|
local _ = nil
|
|
scopes.macro = scope
|
|
_ = nil
|
|
local ok, transformed = nil, nil
|
|
local function _2_()
|
|
return macro_2a(unpack(ast, 2))
|
|
end
|
|
ok, transformed = xpcall(_2_, debug.traceback)
|
|
scopes.macro = old_scope
|
|
assert_compile(ok, transformed, ast)
|
|
if (once or not transformed) then
|
|
return transformed
|
|
else
|
|
return macroexpand_2a(transformed, scope)
|
|
end
|
|
else
|
|
local _ = _0_0
|
|
return ast
|
|
end
|
|
end
|
|
local function compile_special(ast, scope, parent, opts, special)
|
|
local exprs = (special(ast, scope, parent, opts) or utils.expr("nil", "literal"))
|
|
local exprs0 = nil
|
|
if (type(exprs) == "string") then
|
|
exprs0 = utils.expr(exprs, "expression")
|
|
else
|
|
exprs0 = exprs
|
|
end
|
|
local exprs2 = nil
|
|
if utils["expr?"](exprs0) then
|
|
exprs2 = {exprs0}
|
|
else
|
|
exprs2 = exprs0
|
|
end
|
|
if not exprs2.returned then
|
|
return handle_compile_opts(exprs2, parent, opts, ast)
|
|
elseif (opts.tail or opts.target) then
|
|
return {returned = true}
|
|
else
|
|
return exprs2
|
|
end
|
|
end
|
|
local function compile_function_call(ast, scope, parent, opts, compile1, len)
|
|
local fargs = {}
|
|
local fcallee = compile1(ast[1], scope, parent, {nval = 1})[1]
|
|
assert_compile((fcallee.type ~= "literal"), ("cannot call literal value " .. tostring(ast[1])), ast)
|
|
for i = 2, len do
|
|
local subexprs = nil
|
|
local _0_
|
|
if (i ~= len) then
|
|
_0_ = 1
|
|
else
|
|
_0_ = nil
|
|
end
|
|
subexprs = compile1(ast[i], scope, parent, {nval = _0_})
|
|
table.insert(fargs, (subexprs[1] or utils.expr("nil", "literal")))
|
|
if (i == len) then
|
|
for j = 2, #subexprs do
|
|
table.insert(fargs, subexprs[j])
|
|
end
|
|
else
|
|
keep_side_effects(subexprs, parent, 2, ast[i])
|
|
end
|
|
end
|
|
local call = string.format("%s(%s)", tostring(fcallee), exprs1(fargs))
|
|
return handle_compile_opts({utils.expr(call, "statement")}, parent, opts, ast)
|
|
end
|
|
local function compile_call(ast, scope, parent, opts, compile1)
|
|
utils.hook("call", ast, scope)
|
|
local len = #ast
|
|
local first = ast[1]
|
|
local multi_sym_parts = utils["multi-sym?"](first)
|
|
local special = (utils["sym?"](first) and scope.specials[utils.deref(first)])
|
|
assert_compile((len > 0), "expected a function, macro, or special to call", ast)
|
|
if special then
|
|
return compile_special(ast, scope, parent, opts, special)
|
|
elseif (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]) then
|
|
local table_with_method = table.concat({unpack(multi_sym_parts, 1, (#multi_sym_parts - 1))}, ".")
|
|
local method_to_call = multi_sym_parts[#multi_sym_parts]
|
|
local new_ast = utils.list(utils.sym(":", nil, scope), utils.sym(table_with_method, nil, scope), method_to_call, select(2, unpack(ast)))
|
|
return compile1(new_ast, scope, parent, opts)
|
|
else
|
|
return compile_function_call(ast, scope, parent, opts, compile1, len)
|
|
end
|
|
end
|
|
local function compile_varg(ast, scope, parent, opts)
|
|
assert_compile(scope.vararg, "unexpected vararg", ast)
|
|
return handle_compile_opts({utils.expr("...", "varg")}, parent, opts, ast)
|
|
end
|
|
local function compile_sym(ast, scope, parent, opts)
|
|
local multi_sym_parts = utils["multi-sym?"](ast)
|
|
assert_compile(not (multi_sym_parts and multi_sym_parts["multi-sym-method-call"]), "multisym method calls may only be in call position", ast)
|
|
local e = nil
|
|
if (ast[1] == "nil") then
|
|
e = utils.expr("nil", "literal")
|
|
else
|
|
e = symbol_to_expression(ast, scope, true)
|
|
end
|
|
return handle_compile_opts({e}, parent, opts, ast)
|
|
end
|
|
local function serialize_number(n)
|
|
local _0_0 = string.gsub(tostring(n), ",", ".")
|
|
return _0_0
|
|
end
|
|
local function compile_scalar(ast, _scope, parent, opts)
|
|
local serialize = nil
|
|
do
|
|
local _0_0 = type(ast)
|
|
if (_0_0 == "nil") then
|
|
serialize = tostring
|
|
elseif (_0_0 == "boolean") then
|
|
serialize = tostring
|
|
elseif (_0_0 == "string") then
|
|
serialize = serialize_string
|
|
elseif (_0_0 == "number") then
|
|
serialize = serialize_number
|
|
else
|
|
serialize = nil
|
|
end
|
|
end
|
|
return handle_compile_opts({utils.expr(serialize(ast), "literal")}, parent, opts)
|
|
end
|
|
local function compile_table(ast, scope, parent, opts, compile1)
|
|
local buffer = {}
|
|
for i = 1, #ast do
|
|
local nval = ((i ~= #ast) and 1)
|
|
table.insert(buffer, exprs1(compile1(ast[i], scope, parent, {nval = nval})))
|
|
end
|
|
local function write_other_values(k)
|
|
if ((type(k) ~= "number") or (math.floor(k) ~= k) or (k < 1) or (k > #ast)) then
|
|
if ((type(k) == "string") and utils["valid-lua-identifier?"](k)) then
|
|
return {k, k}
|
|
else
|
|
local _0_ = compile1(k, scope, parent, {nval = 1})
|
|
local compiled = _0_[1]
|
|
local kstr = ("[" .. tostring(compiled) .. "]")
|
|
return {kstr, k}
|
|
end
|
|
end
|
|
end
|
|
do
|
|
local keys = nil
|
|
do
|
|
local _0_0 = utils.kvmap(ast, write_other_values)
|
|
local function _1_(a, b)
|
|
return (a[1] < b[1])
|
|
end
|
|
table.sort(_0_0, _1_)
|
|
keys = _0_0
|
|
end
|
|
local function _1_(_2_0)
|
|
local _3_ = _2_0
|
|
local k1 = _3_[1]
|
|
local k2 = _3_[2]
|
|
local _4_ = compile1(ast[k2], scope, parent, {nval = 1})
|
|
local v = _4_[1]
|
|
return string.format("%s = %s", k1, tostring(v))
|
|
end
|
|
utils.map(keys, _1_, buffer)
|
|
end
|
|
return handle_compile_opts({utils.expr(("{" .. table.concat(buffer, ", ") .. "}"), "expression")}, parent, opts, ast)
|
|
end
|
|
local function compile1(ast, scope, parent, opts)
|
|
local opts0 = (opts or {})
|
|
local ast0 = macroexpand_2a(ast, scope)
|
|
if utils["list?"](ast0) then
|
|
return compile_call(ast0, scope, parent, opts0, compile1)
|
|
elseif utils["varg?"](ast0) then
|
|
return compile_varg(ast0, scope, parent, opts0)
|
|
elseif utils["sym?"](ast0) then
|
|
return compile_sym(ast0, scope, parent, opts0)
|
|
elseif (type(ast0) == "table") then
|
|
return compile_table(ast0, scope, parent, opts0, compile1)
|
|
elseif ((type(ast0) == "nil") or (type(ast0) == "boolean") or (type(ast0) == "number") or (type(ast0) == "string")) then
|
|
return compile_scalar(ast0, scope, parent, opts0)
|
|
else
|
|
return assert_compile(false, ("could not compile value of type " .. type(ast0)), ast0)
|
|
end
|
|
end
|
|
local function destructure(to, from, ast, scope, parent, opts)
|
|
local opts0 = (opts or {})
|
|
local _0_ = opts0
|
|
local declaration = _0_["declaration"]
|
|
local forceglobal = _0_["forceglobal"]
|
|
local forceset = _0_["forceset"]
|
|
local isvar = _0_["isvar"]
|
|
local symtype = _0_["symtype"]
|
|
local symtype0 = ("_" .. (symtype or "dst"))
|
|
local setter = nil
|
|
if declaration then
|
|
setter = "local %s = %s"
|
|
else
|
|
setter = "%s = %s"
|
|
end
|
|
local new_manglings = {}
|
|
local function getname(symbol, up1)
|
|
local raw = symbol[1]
|
|
assert_compile(not (opts0.nomulti and utils["multi-sym?"](raw)), ("unexpected multi symbol " .. raw), up1)
|
|
if declaration then
|
|
return declare_local(symbol, nil, scope, symbol, new_manglings)
|
|
else
|
|
local parts = (utils["multi-sym?"](raw) or {raw})
|
|
local meta = scope.symmeta[parts[1]]
|
|
if ((#parts == 1) and not forceset) then
|
|
assert_compile(not (forceglobal and meta), string.format("global %s conflicts with local", tostring(symbol)), symbol)
|
|
assert_compile(not (meta and not meta.var), ("expected var " .. raw), symbol)
|
|
assert_compile((meta or not opts0.noundef), ("expected local " .. parts[1]), symbol)
|
|
end
|
|
if forceglobal then
|
|
assert_compile(not scope.symmeta[scope.unmanglings[raw]], ("global " .. raw .. " conflicts with local"), symbol)
|
|
scope.manglings[raw] = global_mangling(raw)
|
|
scope.unmanglings[global_mangling(raw)] = raw
|
|
if allowed_globals then
|
|
table.insert(allowed_globals, raw)
|
|
end
|
|
end
|
|
return symbol_to_expression(symbol, scope)[1]
|
|
end
|
|
end
|
|
local function compile_top_target(lvalues)
|
|
local inits = nil
|
|
local function _2_(_241)
|
|
if scope.manglings[_241] then
|
|
return _241
|
|
else
|
|
return "nil"
|
|
end
|
|
end
|
|
inits = utils.map(lvalues, _2_)
|
|
local init = table.concat(inits, ", ")
|
|
local lvalue = table.concat(lvalues, ", ")
|
|
local plen, plast = #parent, parent[#parent]
|
|
local ret = compile1(from, scope, parent, {target = lvalue})
|
|
if declaration then
|
|
for pi = plen, #parent do
|
|
if (parent[pi] == plast) then
|
|
plen = pi
|
|
end
|
|
end
|
|
if ((#parent == (plen + 1)) and parent[#parent].leaf) then
|
|
parent[#parent]["leaf"] = ("local " .. parent[#parent].leaf)
|
|
elseif (init == "nil") then
|
|
table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue)})
|
|
else
|
|
table.insert(parent, (plen + 1), {ast = ast, leaf = ("local " .. lvalue .. " = " .. init)})
|
|
end
|
|
end
|
|
return ret
|
|
end
|
|
local function destructure_sym(left, rightexprs, up1, top_3f)
|
|
local lname = getname(left, up1)
|
|
check_binding_valid(left, scope, left)
|
|
if top_3f then
|
|
compile_top_target({lname})
|
|
else
|
|
emit(parent, setter:format(lname, exprs1(rightexprs)), left)
|
|
end
|
|
if declaration then
|
|
scope.symmeta[utils.deref(left)] = {var = isvar}
|
|
return nil
|
|
end
|
|
end
|
|
local function destructure_table(left, rightexprs, top_3f, destructure1)
|
|
local s = gensym(scope, symtype0)
|
|
local right = nil
|
|
do
|
|
local _2_0 = nil
|
|
if top_3f then
|
|
_2_0 = exprs1(compile1(from, scope, parent))
|
|
else
|
|
_2_0 = exprs1(rightexprs)
|
|
end
|
|
if (_2_0 == "") then
|
|
right = "nil"
|
|
elseif (nil ~= _2_0) then
|
|
local right0 = _2_0
|
|
right = right0
|
|
else
|
|
right = nil
|
|
end
|
|
end
|
|
emit(parent, string.format("local %s = %s", s, right), left)
|
|
for k, v in utils.stablepairs(left) do
|
|
if not (("number" == type(k)) and tostring(left[(k - 1)]):find("^&")) then
|
|
if (utils["sym?"](v) and (utils.deref(v) == "&")) then
|
|
local unpack_str = "{(table.unpack or unpack)(%s, %s)}"
|
|
local formatted = string.format(unpack_str, s, k)
|
|
local subexpr = utils.expr(formatted, "expression")
|
|
assert_compile((utils["sequence?"](left) and (nil == left[(k + 2)])), "expected rest argument before last parameter", left)
|
|
destructure1(left[(k + 1)], {subexpr}, left)
|
|
elseif (utils["sym?"](k) and (utils.deref(k) == "&as")) then
|
|
destructure_sym(v, {utils.expr(tostring(s))}, left)
|
|
elseif (utils["sequence?"](left) and (utils.deref(v) == "&as")) then
|
|
local _, next_sym, trailing = select(k, unpack(left))
|
|
assert_compile((nil == trailing), "expected &as argument before last parameter", left)
|
|
destructure_sym(next_sym, {utils.expr(tostring(s))}, left)
|
|
else
|
|
local key = nil
|
|
if (type(k) == "string") then
|
|
key = serialize_string(k)
|
|
else
|
|
key = k
|
|
end
|
|
local subexpr = utils.expr(string.format("%s[%s]", s, key), "expression")
|
|
destructure1(v, {subexpr}, left)
|
|
end
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
local function destructure_values(left, up1, top_3f, destructure1)
|
|
local left_names, tables = {}, {}
|
|
for i, name in ipairs(left) do
|
|
if utils["sym?"](name) then
|
|
table.insert(left_names, getname(name, up1))
|
|
else
|
|
local symname = gensym(scope, symtype0)
|
|
table.insert(left_names, symname)
|
|
tables[i] = {name, utils.expr(symname, "sym")}
|
|
end
|
|
end
|
|
assert_compile(top_3f, "can't nest multi-value destructuring", left)
|
|
compile_top_target(left_names)
|
|
if declaration then
|
|
for _, sym in ipairs(left) do
|
|
scope.symmeta[utils.deref(sym)] = {var = isvar}
|
|
end
|
|
end
|
|
for _, pair in utils.stablepairs(tables) do
|
|
destructure1(pair[1], {pair[2]}, left)
|
|
end
|
|
return nil
|
|
end
|
|
local function destructure1(left, rightexprs, up1, top_3f)
|
|
if (utils["sym?"](left) and (left[1] ~= "nil")) then
|
|
destructure_sym(left, rightexprs, up1, top_3f)
|
|
elseif utils["table?"](left) then
|
|
destructure_table(left, rightexprs, top_3f, destructure1)
|
|
elseif utils["list?"](left) then
|
|
destructure_values(left, up1, top_3f, destructure1)
|
|
else
|
|
assert_compile(false, string.format("unable to bind %s %s", type(left), tostring(left)), (((type(up1[2]) == "table") and up1[2]) or up1))
|
|
end
|
|
if top_3f then
|
|
return {returned = true}
|
|
end
|
|
end
|
|
local ret = destructure1(to, nil, ast, true)
|
|
utils.hook("destructure", from, to, scope)
|
|
apply_manglings(scope, new_manglings, ast)
|
|
return ret
|
|
end
|
|
local function require_include(ast, scope, parent, opts)
|
|
opts.fallback = function(e)
|
|
return utils.expr(string.format("require(%s)", tostring(e)), "statement")
|
|
end
|
|
return scopes.global.specials.include(ast, scope, parent, opts)
|
|
end
|
|
local function compile_stream(strm, options)
|
|
local opts = utils.copy(options)
|
|
local old_globals = allowed_globals
|
|
local scope = (opts.scope or make_scope(scopes.global))
|
|
local vals = {}
|
|
local chunk = {}
|
|
local _0_ = utils.root
|
|
_0_["set-reset"](_0_)
|
|
allowed_globals = opts.allowedGlobals
|
|
if (opts.indent == nil) then
|
|
opts.indent = " "
|
|
end
|
|
if opts.requireAsInclude then
|
|
scope.specials.require = require_include
|
|
end
|
|
utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts
|
|
for _, val in parser.parser(strm, opts.filename, opts) do
|
|
table.insert(vals, val)
|
|
end
|
|
for i = 1, #vals do
|
|
local exprs = compile1(vals[i], scope, chunk, {nval = (((i < #vals) and 0) or nil), tail = (i == #vals)})
|
|
keep_side_effects(exprs, chunk, nil, vals[i])
|
|
end
|
|
allowed_globals = old_globals
|
|
utils.root.reset()
|
|
return flatten(chunk, opts)
|
|
end
|
|
local function compile_string(str, opts)
|
|
return compile_stream(parser["string-stream"](str), (opts or {}))
|
|
end
|
|
local function compile(ast, opts)
|
|
local opts0 = utils.copy(opts)
|
|
local old_globals = allowed_globals
|
|
local chunk = {}
|
|
local scope = (opts0.scope or make_scope(scopes.global))
|
|
local _0_ = utils.root
|
|
_0_["set-reset"](_0_)
|
|
allowed_globals = opts0.allowedGlobals
|
|
if (opts0.indent == nil) then
|
|
opts0.indent = " "
|
|
end
|
|
if opts0.requireAsInclude then
|
|
scope.specials.require = require_include
|
|
end
|
|
utils.root.chunk, utils.root.scope, utils.root.options = chunk, scope, opts0
|
|
local exprs = compile1(ast, scope, chunk, {tail = true})
|
|
keep_side_effects(exprs, chunk, nil, ast)
|
|
allowed_globals = old_globals
|
|
utils.root.reset()
|
|
return flatten(chunk, opts0)
|
|
end
|
|
local function traceback_frame(info)
|
|
if ((info.what == "C") and info.name) then
|
|
return string.format(" [C]: in function '%s'", info.name)
|
|
elseif (info.what == "C") then
|
|
return " [C]: in ?"
|
|
else
|
|
local remap = fennel_sourcemap[info.source]
|
|
if (remap and remap[info.currentline]) then
|
|
if remap[info.currentline][1] then
|
|
info.short_src = fennel_sourcemap[("@" .. remap[info.currentline][1])].short_src
|
|
else
|
|
info.short_src = remap.short_src
|
|
end
|
|
info.currentline = (remap[info.currentline][2] or -1)
|
|
end
|
|
if (info.what == "Lua") then
|
|
local function _1_()
|
|
if info.name then
|
|
return ("'" .. info.name .. "'")
|
|
else
|
|
return "?"
|
|
end
|
|
end
|
|
return string.format(" %s:%d: in function %s", info.short_src, info.currentline, _1_())
|
|
elseif (info.short_src == "(tail call)") then
|
|
return " (tail call)"
|
|
else
|
|
return string.format(" %s:%d: in main chunk", info.short_src, info.currentline)
|
|
end
|
|
end
|
|
end
|
|
local function traceback(msg, start)
|
|
local msg0 = (msg or "")
|
|
if ((msg0:find("^Compile error") or msg0:find("^Parse error")) and not utils["debug-on?"]("trace")) then
|
|
return msg0
|
|
else
|
|
local lines = {}
|
|
if (msg0:find("^Compile error") or msg0:find("^Parse error")) then
|
|
table.insert(lines, msg0)
|
|
else
|
|
local newmsg = msg0:gsub("^[^:]*:%d+:%s+", "runtime error: ")
|
|
table.insert(lines, newmsg)
|
|
end
|
|
table.insert(lines, "stack traceback:")
|
|
local done_3f, level = false, (start or 2)
|
|
while not done_3f do
|
|
do
|
|
local _1_0 = debug.getinfo(level, "Sln")
|
|
if (_1_0 == nil) then
|
|
done_3f = true
|
|
elseif (nil ~= _1_0) then
|
|
local info = _1_0
|
|
table.insert(lines, traceback_frame(info))
|
|
end
|
|
end
|
|
level = (level + 1)
|
|
end
|
|
return table.concat(lines, "\n")
|
|
end
|
|
end
|
|
local function entry_transform(fk, fv)
|
|
local function _0_(k, v)
|
|
if (type(k) == "number") then
|
|
return k, fv(v)
|
|
else
|
|
return fk(k), fv(v)
|
|
end
|
|
end
|
|
return _0_
|
|
end
|
|
local function mixed_concat(t, joiner)
|
|
local seen = {}
|
|
local ret, s = "", ""
|
|
for k, v in ipairs(t) do
|
|
table.insert(seen, k)
|
|
ret = (ret .. s .. v)
|
|
s = joiner
|
|
end
|
|
for k, v in utils.stablepairs(t) do
|
|
if not seen[k] then
|
|
ret = (ret .. s .. "[" .. k .. "]" .. "=" .. v)
|
|
s = joiner
|
|
end
|
|
end
|
|
return ret
|
|
end
|
|
local function do_quote(form, scope, parent, runtime_3f)
|
|
local function q(x)
|
|
return do_quote(x, scope, parent, runtime_3f)
|
|
end
|
|
if utils["varg?"](form) then
|
|
assert_compile(not runtime_3f, "quoted ... may only be used at compile time", form)
|
|
return "_VARARG"
|
|
elseif utils["sym?"](form) then
|
|
local filename = nil
|
|
if form.filename then
|
|
filename = string.format("%q", form.filename)
|
|
else
|
|
filename = "nil"
|
|
end
|
|
local symstr = utils.deref(form)
|
|
assert_compile(not runtime_3f, "symbols may only be used at compile time", form)
|
|
if (symstr:find("#$") or symstr:find("#[:.]")) then
|
|
return string.format("sym('%s', {filename=%s, line=%s})", autogensym(symstr, scope), filename, (form.line or "nil"))
|
|
else
|
|
return string.format("sym('%s', {quoted=true, filename=%s, line=%s})", symstr, filename, (form.line or "nil"))
|
|
end
|
|
elseif (utils["list?"](form) and utils["sym?"](form[1]) and (utils.deref(form[1]) == "unquote")) then
|
|
local payload = form[2]
|
|
local res = unpack(compile1(payload, scope, parent))
|
|
return res[1]
|
|
elseif utils["list?"](form) then
|
|
local mapped = nil
|
|
local function _0_()
|
|
return nil
|
|
end
|
|
mapped = utils.kvmap(form, entry_transform(_0_, q))
|
|
local filename = nil
|
|
if form.filename then
|
|
filename = string.format("%q", form.filename)
|
|
else
|
|
filename = "nil"
|
|
end
|
|
assert_compile(not runtime_3f, "lists may only be used at compile time", form)
|
|
return string.format(("setmetatable({filename=%s, line=%s, bytestart=%s, %s}" .. ", getmetatable(list()))"), filename, (form.line or "nil"), (form.bytestart or "nil"), mixed_concat(mapped, ", "))
|
|
elseif utils["sequence?"](form) then
|
|
local mapped = utils.kvmap(form, entry_transform(q, q))
|
|
local source = getmetatable(form)
|
|
local filename = nil
|
|
if source.filename then
|
|
filename = string.format("%q", source.filename)
|
|
else
|
|
filename = "nil"
|
|
end
|
|
local _1_
|
|
if source then
|
|
_1_ = source.line
|
|
else
|
|
_1_ = "nil"
|
|
end
|
|
return string.format("setmetatable({%s}, {filename=%s, line=%s, sequence=%s})", mixed_concat(mapped, ", "), filename, _1_, "(getmetatable(sequence()))['sequence']")
|
|
elseif (type(form) == "table") then
|
|
local mapped = utils.kvmap(form, entry_transform(q, q))
|
|
local source = getmetatable(form)
|
|
local filename = nil
|
|
if source.filename then
|
|
filename = string.format("%q", source.filename)
|
|
else
|
|
filename = "nil"
|
|
end
|
|
local function _1_()
|
|
if source then
|
|
return source.line
|
|
else
|
|
return "nil"
|
|
end
|
|
end
|
|
return string.format("setmetatable({%s}, {filename=%s, line=%s})", mixed_concat(mapped, ", "), filename, _1_())
|
|
elseif (type(form) == "string") then
|
|
return serialize_string(form)
|
|
else
|
|
return tostring(form)
|
|
end
|
|
end
|
|
return {["apply-manglings"] = apply_manglings, ["compile-stream"] = compile_stream, ["compile-string"] = compile_string, ["declare-local"] = declare_local, ["do-quote"] = do_quote, ["global-mangling"] = global_mangling, ["global-unmangling"] = global_unmangling, ["keep-side-effects"] = keep_side_effects, ["make-scope"] = make_scope, ["require-include"] = require_include, ["symbol-to-expression"] = symbol_to_expression, assert = assert_compile, autogensym = autogensym, compile = compile, compile1 = compile1, destructure = destructure, emit = emit, gensym = gensym, macroexpand = macroexpand_2a, metadata = make_metadata(), scopes = scopes, traceback = traceback}
|
|
end
|
|
package.preload["fennel.friend"] = package.preload["fennel.friend"] or function(...)
|
|
local function ast_source(ast)
|
|
local m = getmetatable(ast)
|
|
return ((m and m.line and m) or (("table" == type(ast)) and ast) or {})
|
|
end
|
|
local suggestions = {["$ and $... in hashfn are mutually exclusive"] = {"modifying the hashfn so it only contains $... or $, $1, $2, $3, etc"}, ["can't start multisym segment with a digit"] = {"removing the digit", "adding a non-digit before the digit"}, ["cannot call literal value"] = {"checking for typos", "checking for a missing function name"}, ["could not compile value of type "] = {"debugging the macro you're calling to return a list or table"}, ["could not read number (.*)"] = {"removing the non-digit character", "beginning the identifier with a non-digit if it is not meant to be a number"}, ["expected a function.* to call"] = {"removing the empty parentheses", "using square brackets if you want an empty table"}, ["expected binding table"] = {"placing a table here in square brackets containing identifiers to bind"}, ["expected body expression"] = {"putting some code in the body of this form after the bindings"}, ["expected each macro to be function"] = {"ensuring that the value for each key in your macros table contains a function", "avoid defining nested macro tables"}, ["expected even number of name/value bindings"] = {"finding where the identifier or value is missing"}, ["expected even number of values in table literal"] = {"removing a key", "adding a value"}, ["expected local"] = {"looking for a typo", "looking for a local which is used out of its scope"}, ["expected macros to be table"] = {"ensuring your macro definitions return a table"}, ["expected parameters"] = {"adding function parameters as a list of identifiers in brackets"}, ["expected rest argument before last parameter"] = {"moving & to right before the final identifier when destructuring"}, ["expected symbol for function parameter: (.*)"] = {"changing %s to an identifier instead of a literal value"}, ["expected var (.*)"] = {"declaring %s using var instead of let/local", "introducing a new local instead of changing the value of %s"}, ["expected vararg as last parameter"] = {"moving the \"...\" to the end of the parameter list"}, ["expected whitespace before opening delimiter"] = {"adding whitespace"}, ["global (.*) conflicts with local"] = {"renaming local %s"}, ["illegal character: (.)"] = {"deleting or replacing %s", "avoiding reserved characters like \", \\, ', ~, ;, @, `, and comma"}, ["local (.*) was overshadowed by a special form or macro"] = {"renaming local %s"}, ["macro not found in macro module"] = {"checking the keys of the imported macro module's returned table"}, ["macro tried to bind (.*) without gensym"] = {"changing to %s# when introducing identifiers inside macros"}, ["malformed multisym"] = {"ensuring each period or colon is not followed by another period or colon"}, ["may only be used at compile time"] = {"moving this to inside a macro if you need to manipulate symbols/lists", "using square brackets instead of parens to construct a table"}, ["method must be last component"] = {"using a period instead of a colon for field access", "removing segments after the colon", "making the method call, then looking up the field on the result"}, ["mismatched closing delimiter (.), expected (.)"] = {"replacing %s with %s", "deleting %s", "adding matching opening delimiter earlier"}, ["multisym method calls may only be in call position"] = {"using a period instead of a colon to reference a table's fields", "putting parens around this"}, ["unable to bind (.*)"] = {"replacing the %s with an identifier"}, ["unexpected closing delimiter (.)"] = {"deleting %s", "adding matching opening delimiter earlier"}, ["unexpected multi symbol (.*)"] = {"removing periods or colons from %s"}, ["unexpected vararg"] = {"putting \"...\" at the end of the fn parameters if the vararg was intended"}, ["unknown global in strict mode: (.*)"] = {"looking to see if there's a typo", "using the _G table instead, eg. _G.%s if you really want a global", "moving this code to somewhere that %s is in scope", "binding %s as a local in the scope of this code"}, ["unused local (.*)"] = {"fixing a typo so %s is used", "renaming the local to _%s"}, ["use of global (.*) is aliased by a local"] = {"renaming local %s", "refer to the global using _G.%s instead of directly"}}
|
|
local unpack = (table.unpack or _G.unpack)
|
|
local function suggest(msg)
|
|
local suggestion = nil
|
|
for pat, sug in pairs(suggestions) do
|
|
local matches = {msg:match(pat)}
|
|
if (0 < #matches) then
|
|
if ("table" == type(sug)) then
|
|
local out = {}
|
|
for _, s in ipairs(sug) do
|
|
table.insert(out, s:format(unpack(matches)))
|
|
end
|
|
suggestion = out
|
|
else
|
|
suggestion = sug(matches)
|
|
end
|
|
end
|
|
end
|
|
return suggestion
|
|
end
|
|
local function read_line_from_file(filename, line)
|
|
local bytes = 0
|
|
local f = assert(io.open(filename))
|
|
local _ = nil
|
|
for _0 = 1, (line - 1) do
|
|
bytes = (bytes + 1 + #f:read())
|
|
end
|
|
_ = nil
|
|
local codeline = f:read()
|
|
f:close()
|
|
return codeline, bytes
|
|
end
|
|
local function read_line_from_string(matcher, target_line, _3fcurrent_line, _3fbytes)
|
|
local this_line, newline = matcher()
|
|
local current_line = (_3fcurrent_line or 1)
|
|
local bytes = ((_3fbytes or 0) + #this_line + #newline)
|
|
if (target_line == current_line) then
|
|
return this_line, bytes
|
|
elseif this_line then
|
|
return read_line_from_string(matcher, target_line, (current_line + 1), bytes)
|
|
end
|
|
end
|
|
local function read_line(filename, line, source)
|
|
if source then
|
|
return read_line_from_string(string.gmatch((source .. "\n"), "(.-)(\13?\n)"), line)
|
|
else
|
|
return read_line_from_file(filename, line)
|
|
end
|
|
end
|
|
local function friendly_msg(msg, _0_0, source)
|
|
local _1_ = _0_0
|
|
local byteend = _1_["byteend"]
|
|
local bytestart = _1_["bytestart"]
|
|
local filename = _1_["filename"]
|
|
local line = _1_["line"]
|
|
local ok, codeline, bol = pcall(read_line, filename, line, source)
|
|
local suggestions0 = suggest(msg)
|
|
local out = {msg, ""}
|
|
if (ok and codeline) then
|
|
table.insert(out, codeline)
|
|
end
|
|
if (ok and codeline and bytestart and byteend) then
|
|
table.insert(out, (string.rep(" ", (bytestart - bol - 1)) .. "^" .. string.rep("^", math.min((byteend - bytestart), ((bol + #codeline) - bytestart)))))
|
|
end
|
|
if (ok and codeline and bytestart and not byteend) then
|
|
table.insert(out, (string.rep("-", (bytestart - bol - 1)) .. "^"))
|
|
table.insert(out, "")
|
|
end
|
|
if suggestions0 then
|
|
for _, suggestion in ipairs(suggestions0) do
|
|
table.insert(out, ("* Try %s."):format(suggestion))
|
|
end
|
|
end
|
|
return table.concat(out, "\n")
|
|
end
|
|
local function assert_compile(condition, msg, ast, source)
|
|
if not condition then
|
|
local _1_ = ast_source(ast)
|
|
local filename = _1_["filename"]
|
|
local line = _1_["line"]
|
|
error(friendly_msg(("Compile error in %s:%s\n %s"):format((filename or "unknown"), (line or "?"), msg), ast_source(ast), source), 0)
|
|
end
|
|
return condition
|
|
end
|
|
local function parse_error(msg, filename, line, bytestart, source)
|
|
return error(friendly_msg(("Parse error in %s:%s\n %s"):format(filename, line, msg), {bytestart = bytestart, filename = filename, line = line}, source), 0)
|
|
end
|
|
return {["assert-compile"] = assert_compile, ["parse-error"] = parse_error}
|
|
end
|
|
package.preload["fennel.parser"] = package.preload["fennel.parser"] or function(...)
|
|
local utils = require("fennel.utils")
|
|
local friend = require("fennel.friend")
|
|
local unpack = (table.unpack or _G.unpack)
|
|
local function granulate(getchunk)
|
|
local c, index, done_3f = "", 1, false
|
|
local function _0_(parser_state)
|
|
if not done_3f then
|
|
if (index <= #c) then
|
|
local b = c:byte(index)
|
|
index = (index + 1)
|
|
return b
|
|
else
|
|
local _1_0, _2_0, _3_0 = getchunk(parser_state)
|
|
local _4_
|
|
do
|
|
local char = _1_0
|
|
_4_ = ((nil ~= _1_0) and (char ~= ""))
|
|
end
|
|
if _4_ then
|
|
local char = _1_0
|
|
c = char
|
|
index = 2
|
|
return c:byte()
|
|
else
|
|
local _ = _1_0
|
|
done_3f = true
|
|
return nil
|
|
end
|
|
end
|
|
end
|
|
end
|
|
local function _1_()
|
|
c = ""
|
|
return nil
|
|
end
|
|
return _0_, _1_
|
|
end
|
|
local function string_stream(str)
|
|
local str0 = str:gsub("^#!", ";;")
|
|
local index = 1
|
|
local function _0_()
|
|
local r = str0:byte(index)
|
|
index = (index + 1)
|
|
return r
|
|
end
|
|
return _0_
|
|
end
|
|
local delims = {[123] = 125, [125] = true, [40] = 41, [41] = true, [91] = 93, [93] = true}
|
|
local function whitespace_3f(b)
|
|
return ((b == 32) or ((b >= 9) and (b <= 13)))
|
|
end
|
|
local function sym_char_3f(b)
|
|
local b0 = nil
|
|
if ("number" == type(b)) then
|
|
b0 = b
|
|
else
|
|
b0 = string.byte(b)
|
|
end
|
|
return ((b0 > 32) and not delims[b0] and (b0 ~= 127) and (b0 ~= 34) and (b0 ~= 39) and (b0 ~= 126) and (b0 ~= 59) and (b0 ~= 44) and (b0 ~= 64) and (b0 ~= 96))
|
|
end
|
|
local prefixes = {[35] = "hashfn", [39] = "quote", [44] = "unquote", [96] = "quote"}
|
|
local function parser(getbyte, filename, options)
|
|
local stack = {}
|
|
local line = 1
|
|
local byteindex = 0
|
|
local lastb = nil
|
|
local function ungetb(ub)
|
|
if (ub == 10) then
|
|
line = (line - 1)
|
|
end
|
|
byteindex = (byteindex - 1)
|
|
lastb = ub
|
|
return nil
|
|
end
|
|
local function getb()
|
|
local r = nil
|
|
if lastb then
|
|
r, lastb = lastb, nil
|
|
else
|
|
r = getbyte({["stack-size"] = #stack})
|
|
end
|
|
byteindex = (byteindex + 1)
|
|
if (r == 10) then
|
|
line = (line + 1)
|
|
end
|
|
return r
|
|
end
|
|
assert(((nil == filename) or ("string" == type(filename))), "expected filename as second argument to parser")
|
|
local function parse_error(msg, byteindex_override)
|
|
local _0_ = (options or utils.root.options or {})
|
|
local source = _0_["source"]
|
|
local unfriendly = _0_["unfriendly"]
|
|
utils.root.reset()
|
|
if unfriendly then
|
|
return error(string.format("Parse error in %s:%s: %s", (filename or "unknown"), (line or "?"), msg), 0)
|
|
else
|
|
return friend["parse-error"](msg, (filename or "unknown"), (line or "?"), (byteindex_override or byteindex), source)
|
|
end
|
|
end
|
|
local function parse_stream()
|
|
local whitespace_since_dispatch, done_3f, retval = true
|
|
local function dispatch(v)
|
|
local _0_0 = stack[#stack]
|
|
if (_0_0 == nil) then
|
|
retval, done_3f, whitespace_since_dispatch = v, true, false
|
|
return nil
|
|
elseif ((type(_0_0) == "table") and (nil ~= _0_0.prefix)) then
|
|
local prefix = _0_0.prefix
|
|
local source = nil
|
|
do
|
|
local _1_0 = table.remove(stack)
|
|
_1_0["byteend"] = byteindex
|
|
source = _1_0
|
|
end
|
|
local list = utils.list(utils.sym(prefix, source), v)
|
|
for k, v0 in pairs(source) do
|
|
list[k] = v0
|
|
end
|
|
return dispatch(list)
|
|
elseif (nil ~= _0_0) then
|
|
local top = _0_0
|
|
whitespace_since_dispatch = false
|
|
return table.insert(top, v)
|
|
end
|
|
end
|
|
local function badend()
|
|
local accum = utils.map(stack, "closer")
|
|
local _0_
|
|
if (#stack == 1) then
|
|
_0_ = ""
|
|
else
|
|
_0_ = "s"
|
|
end
|
|
return parse_error(string.format("expected closing delimiter%s %s", _0_, string.char(unpack(accum))))
|
|
end
|
|
local function skip_whitespace(b)
|
|
if (b and whitespace_3f(b)) then
|
|
whitespace_since_dispatch = true
|
|
return skip_whitespace(getb())
|
|
elseif (not b and (#stack > 0)) then
|
|
return badend()
|
|
else
|
|
return b
|
|
end
|
|
end
|
|
local function parse_comment(b, contents)
|
|
if (b and (10 ~= b)) then
|
|
local function _1_()
|
|
local _0_0 = contents
|
|
table.insert(_0_0, string.char(b))
|
|
return _0_0
|
|
end
|
|
return parse_comment(getb(), _1_())
|
|
elseif (options and options.comments) then
|
|
return dispatch(utils.comment(table.concat(contents), {filename = filename, line = (line - 1)}))
|
|
else
|
|
return b
|
|
end
|
|
end
|
|
local function open_table(b)
|
|
if not whitespace_since_dispatch then
|
|
parse_error(("expected whitespace before opening delimiter " .. string.char(b)))
|
|
end
|
|
return table.insert(stack, {bytestart = byteindex, closer = delims[b], filename = filename, line = line})
|
|
end
|
|
local function close_list(list)
|
|
return dispatch(setmetatable(list, getmetatable(utils.list())))
|
|
end
|
|
local function close_sequence(tbl)
|
|
local val = utils.sequence(unpack(tbl))
|
|
for k, v in pairs(tbl) do
|
|
getmetatable(val)[k] = v
|
|
end
|
|
return dispatch(val)
|
|
end
|
|
local function add_comment_at(comments, index, node)
|
|
local _0_0 = comments[index]
|
|
if (nil ~= _0_0) then
|
|
local existing = _0_0
|
|
return table.insert(existing, node)
|
|
else
|
|
local _ = _0_0
|
|
comments[index] = {node}
|
|
return nil
|
|
end
|
|
end
|
|
local function next_noncomment(tbl, i)
|
|
if utils["comment?"](tbl[i]) then
|
|
return next_noncomment(tbl, (i + 1))
|
|
else
|
|
return tbl[i]
|
|
end
|
|
end
|
|
local function extract_comments(tbl)
|
|
local comments = {keys = {}, last = {}, values = {}}
|
|
while utils["comment?"](tbl[#tbl]) do
|
|
table.insert(comments.last, 1, table.remove(tbl))
|
|
end
|
|
local last_key_3f = false
|
|
for i, node in ipairs(tbl) do
|
|
if not utils["comment?"](node) then
|
|
last_key_3f = not last_key_3f
|
|
elseif last_key_3f then
|
|
add_comment_at(comments.values, next_noncomment(tbl, i), node)
|
|
else
|
|
add_comment_at(comments.keys, next_noncomment(tbl, i), node)
|
|
end
|
|
end
|
|
for i = #tbl, 1, -1 do
|
|
if utils["comment?"](tbl[i]) then
|
|
table.remove(tbl, i)
|
|
end
|
|
end
|
|
return comments
|
|
end
|
|
local function close_curly_table(tbl)
|
|
local comments = extract_comments(tbl)
|
|
local keys = {}
|
|
local val = {}
|
|
if ((#tbl % 2) ~= 0) then
|
|
byteindex = (byteindex - 1)
|
|
parse_error("expected even number of values in table literal")
|
|
end
|
|
setmetatable(val, tbl)
|
|
for i = 1, #tbl, 2 do
|
|
if ((tostring(tbl[i]) == ":") and utils["sym?"](tbl[(i + 1)]) and utils["sym?"](tbl[i])) then
|
|
tbl[i] = tostring(tbl[(i + 1)])
|
|
end
|
|
val[tbl[i]] = tbl[(i + 1)]
|
|
table.insert(keys, tbl[i])
|
|
end
|
|
tbl.comments = comments
|
|
tbl.keys = keys
|
|
return dispatch(val)
|
|
end
|
|
local function close_table(b)
|
|
local top = table.remove(stack)
|
|
if (top == nil) then
|
|
parse_error(("unexpected closing delimiter " .. string.char(b)))
|
|
end
|
|
if (top.closer and (top.closer ~= b)) then
|
|
parse_error(("mismatched closing delimiter " .. string.char(b) .. ", expected " .. string.char(top.closer)))
|
|
end
|
|
top.byteend = byteindex
|
|
if (b == 41) then
|
|
return close_list(top)
|
|
elseif (b == 93) then
|
|
return close_sequence(top)
|
|
else
|
|
return close_curly_table(top)
|
|
end
|
|
end
|
|
local function parse_string_loop(chars, b, state)
|
|
table.insert(chars, b)
|
|
local state0 = nil
|
|
do
|
|
local _0_0 = {state, b}
|
|
if ((type(_0_0) == "table") and (_0_0[1] == "base") and (_0_0[2] == 92)) then
|
|
state0 = "backslash"
|
|
elseif ((type(_0_0) == "table") and (_0_0[1] == "base") and (_0_0[2] == 34)) then
|
|
state0 = "done"
|
|
else
|
|
local _ = _0_0
|
|
state0 = "base"
|
|
end
|
|
end
|
|
if (b and (state0 ~= "done")) then
|
|
return parse_string_loop(chars, getb(), state0)
|
|
else
|
|
return b
|
|
end
|
|
end
|
|
local function escape_char(c)
|
|
return ({[10] = "\\n", [11] = "\\v", [12] = "\\f", [13] = "\\r", [7] = "\\a", [8] = "\\b", [9] = "\\t"})[c:byte()]
|
|
end
|
|
local function parse_string()
|
|
table.insert(stack, {closer = 34})
|
|
local chars = {34}
|
|
if not parse_string_loop(chars, getb(), "base") then
|
|
badend()
|
|
end
|
|
table.remove(stack)
|
|
local raw = string.char(unpack(chars))
|
|
local formatted = raw:gsub("[\7-\13]", escape_char)
|
|
local load_fn = (rawget(_G, "loadstring") or load)(("return " .. formatted))
|
|
return dispatch(load_fn())
|
|
end
|
|
local function parse_prefix(b)
|
|
table.insert(stack, {bytestart = byteindex, filename = filename, line = line, prefix = prefixes[b]})
|
|
local nextb = getb()
|
|
if (whitespace_3f(nextb) or (true == delims[nextb])) then
|
|
if (b ~= 35) then
|
|
parse_error("invalid whitespace after quoting prefix")
|
|
end
|
|
table.remove(stack)
|
|
dispatch(utils.sym("#"))
|
|
end
|
|
return ungetb(nextb)
|
|
end
|
|
local function parse_sym_loop(chars, b)
|
|
if (b and sym_char_3f(b)) then
|
|
table.insert(chars, b)
|
|
return parse_sym_loop(chars, getb())
|
|
else
|
|
if b then
|
|
ungetb(b)
|
|
end
|
|
return chars
|
|
end
|
|
end
|
|
local function parse_number(rawstr)
|
|
local number_with_stripped_underscores = (not rawstr:find("^_") and rawstr:gsub("_", ""))
|
|
if rawstr:match("^%d") then
|
|
dispatch((tonumber(number_with_stripped_underscores) or parse_error(("could not read number \"" .. rawstr .. "\""))))
|
|
return true
|
|
else
|
|
local _0_0 = tonumber(number_with_stripped_underscores)
|
|
if (nil ~= _0_0) then
|
|
local x = _0_0
|
|
dispatch(x)
|
|
return true
|
|
else
|
|
local _ = _0_0
|
|
return false
|
|
end
|
|
end
|
|
end
|
|
local function check_malformed_sym(rawstr)
|
|
if (rawstr:match("^~") and (rawstr ~= "~=")) then
|
|
return parse_error("illegal character: ~")
|
|
elseif rawstr:match("%.[0-9]") then
|
|
return parse_error(("can't start multisym segment with a digit: " .. rawstr), (((byteindex - #rawstr) + rawstr:find("%.[0-9]")) + 1))
|
|
elseif (rawstr:match("[%.:][%.:]") and (rawstr ~= "..") and (rawstr ~= "$...")) then
|
|
return parse_error(("malformed multisym: " .. rawstr), ((byteindex - #rawstr) + 1 + rawstr:find("[%.:][%.:]")))
|
|
elseif rawstr:match(":.+[%.:]") then
|
|
return parse_error(("method must be last component of multisym: " .. rawstr), ((byteindex - #rawstr) + rawstr:find(":.+[%.:]")))
|
|
else
|
|
return rawstr
|
|
end
|
|
end
|
|
local function parse_sym(b)
|
|
local bytestart = byteindex
|
|
local rawstr = string.char(unpack(parse_sym_loop({b}, getb())))
|
|
if (rawstr == "true") then
|
|
return dispatch(true)
|
|
elseif (rawstr == "false") then
|
|
return dispatch(false)
|
|
elseif (rawstr == "...") then
|
|
return dispatch(utils.varg())
|
|
elseif rawstr:match("^:.+$") then
|
|
return dispatch(rawstr:sub(2))
|
|
elseif not parse_number(rawstr) then
|
|
return dispatch(utils.sym(check_malformed_sym(rawstr), {byteend = byteindex, bytestart = bytestart, filename = filename, line = line}))
|
|
end
|
|
end
|
|
local function parse_loop(b)
|
|
if not b then
|
|
elseif (b == 59) then
|
|
parse_comment(getb(), {";"})
|
|
elseif (type(delims[b]) == "number") then
|
|
open_table(b)
|
|
elseif delims[b] then
|
|
close_table(b)
|
|
elseif (b == 34) then
|
|
parse_string(b)
|
|
elseif prefixes[b] then
|
|
parse_prefix(b)
|
|
elseif (sym_char_3f(b) or (b == string.byte("~"))) then
|
|
parse_sym(b)
|
|
else
|
|
parse_error(("illegal character: " .. string.char(b)))
|
|
end
|
|
if not b then
|
|
return nil
|
|
elseif done_3f then
|
|
return true, retval
|
|
else
|
|
return parse_loop(skip_whitespace(getb()))
|
|
end
|
|
end
|
|
return parse_loop(skip_whitespace(getb()))
|
|
end
|
|
local function _0_()
|
|
stack = {}
|
|
return nil
|
|
end
|
|
return parse_stream, _0_
|
|
end
|
|
return {["string-stream"] = string_stream, ["sym-char?"] = sym_char_3f, granulate = granulate, parser = parser}
|
|
end
|
|
local utils = nil
|
|
package.preload["fennel.utils"] = package.preload["fennel.utils"] or function(...)
|
|
local function stablepairs(t)
|
|
local keys = {}
|
|
local succ = {}
|
|
for k in pairs(t) do
|
|
table.insert(keys, k)
|
|
end
|
|
local function _0_(_241, _242)
|
|
return (tostring(_241) < tostring(_242))
|
|
end
|
|
table.sort(keys, _0_)
|
|
for i, k in ipairs(keys) do
|
|
succ[k] = keys[(i + 1)]
|
|
end
|
|
local function stablenext(tbl, idx)
|
|
local key = nil
|
|
if (idx == nil) then
|
|
key = keys[1]
|
|
else
|
|
key = succ[idx]
|
|
end
|
|
local value = nil
|
|
if (key == nil) then
|
|
value = nil
|
|
else
|
|
value = tbl[key]
|
|
end
|
|
return key, value
|
|
end
|
|
return stablenext, t, nil
|
|
end
|
|
local function map(t, f, out)
|
|
local out0 = (out or {})
|
|
local f0 = nil
|
|
if (type(f) == "function") then
|
|
f0 = f
|
|
else
|
|
local function _0_(_241)
|
|
return _241[f]
|
|
end
|
|
f0 = _0_
|
|
end
|
|
for _, x in ipairs(t) do
|
|
local _1_0 = f0(x)
|
|
if (nil ~= _1_0) then
|
|
local v = _1_0
|
|
table.insert(out0, v)
|
|
end
|
|
end
|
|
return out0
|
|
end
|
|
local function kvmap(t, f, out)
|
|
local out0 = (out or {})
|
|
local f0 = nil
|
|
if (type(f) == "function") then
|
|
f0 = f
|
|
else
|
|
local function _0_(_241)
|
|
return _241[f]
|
|
end
|
|
f0 = _0_
|
|
end
|
|
for k, x in stablepairs(t) do
|
|
local _1_0, _2_0 = f0(k, x)
|
|
if ((nil ~= _1_0) and (nil ~= _2_0)) then
|
|
local key = _1_0
|
|
local value = _2_0
|
|
out0[key] = value
|
|
elseif (nil ~= _1_0) then
|
|
local value = _1_0
|
|
table.insert(out0, value)
|
|
end
|
|
end
|
|
return out0
|
|
end
|
|
local function copy(from, to)
|
|
local to0 = (to or {})
|
|
for k, v in pairs((from or {})) do
|
|
to0[k] = v
|
|
end
|
|
return to0
|
|
end
|
|
local function member_3f(x, tbl, n)
|
|
local _0_0 = tbl[(n or 1)]
|
|
if (_0_0 == x) then
|
|
return true
|
|
elseif (_0_0 == nil) then
|
|
return false
|
|
else
|
|
local _ = _0_0
|
|
return member_3f(x, tbl, ((n or 1) + 1))
|
|
end
|
|
end
|
|
local function allpairs(tbl)
|
|
assert((type(tbl) == "table"), "allpairs expects a table")
|
|
local t = tbl
|
|
local seen = {}
|
|
local function allpairs_next(_, state)
|
|
local next_state, value = next(t, state)
|
|
if seen[next_state] then
|
|
return allpairs_next(nil, next_state)
|
|
elseif next_state then
|
|
seen[next_state] = true
|
|
return next_state, value
|
|
else
|
|
local meta = getmetatable(t)
|
|
if (meta and meta.__index) then
|
|
t = meta.__index
|
|
return allpairs_next(t)
|
|
end
|
|
end
|
|
end
|
|
return allpairs_next
|
|
end
|
|
local function deref(self)
|
|
return self[1]
|
|
end
|
|
local nil_sym = nil
|
|
local function list__3estring(self, tostring2)
|
|
local safe, max = {}, 0
|
|
for k in pairs(self) do
|
|
if ((type(k) == "number") and (k > max)) then
|
|
max = k
|
|
end
|
|
end
|
|
for i = 1, max do
|
|
safe[i] = (((self[i] == nil) and nil_sym) or self[i])
|
|
end
|
|
return ("(" .. table.concat(map(safe, (tostring2 or tostring)), " ", 1, max) .. ")")
|
|
end
|
|
local function comment_view(c)
|
|
return c, true
|
|
end
|
|
local function sym_3d(a, b)
|
|
return ((deref(a) == deref(b)) and (getmetatable(a) == getmetatable(b)))
|
|
end
|
|
local function sym_3c(a, b)
|
|
return (a[1] < tostring(b))
|
|
end
|
|
local symbol_mt = {"SYMBOL", __eq = sym_3d, __fennelview = deref, __lt = sym_3c, __tostring = deref}
|
|
local expr_mt = {"EXPR", __tostring = deref}
|
|
local list_mt = {"LIST", __fennelview = list__3estring, __tostring = list__3estring}
|
|
local comment_mt = {"COMMENT", __eq = sym_3d, __fennelview = comment_view, __lt = sym_3c, __tostring = deref}
|
|
local sequence_marker = {"SEQUENCE"}
|
|
local vararg = setmetatable({"..."}, {"VARARG", __fennelview = deref, __tostring = deref})
|
|
local getenv = nil
|
|
local function _0_()
|
|
return nil
|
|
end
|
|
getenv = ((os and os.getenv) or _0_)
|
|
local function debug_on_3f(flag)
|
|
local level = (getenv("FENNEL_DEBUG") or "")
|
|
return ((level == "all") or level:find(flag))
|
|
end
|
|
local function list(...)
|
|
return setmetatable({...}, list_mt)
|
|
end
|
|
local function sym(str, _3fsource, _3fscope)
|
|
local s = {str, ["?scope"] = _3fscope}
|
|
for k, v in pairs((_3fsource or {})) do
|
|
if (type(k) == "string") then
|
|
s[k] = v
|
|
end
|
|
end
|
|
return setmetatable(s, symbol_mt)
|
|
end
|
|
nil_sym = sym("nil")
|
|
local function sequence(...)
|
|
return setmetatable({...}, {sequence = sequence_marker})
|
|
end
|
|
local function expr(strcode, etype)
|
|
return setmetatable({strcode, type = etype}, expr_mt)
|
|
end
|
|
local function comment_2a(contents, _3fsource)
|
|
local _1_ = (_3fsource or {})
|
|
local filename = _1_["filename"]
|
|
local line = _1_["line"]
|
|
return setmetatable({contents, filename = filename, line = line}, comment_mt)
|
|
end
|
|
local function varg()
|
|
return vararg
|
|
end
|
|
local function expr_3f(x)
|
|
return ((type(x) == "table") and (getmetatable(x) == expr_mt) and x)
|
|
end
|
|
local function varg_3f(x)
|
|
return ((x == vararg) and x)
|
|
end
|
|
local function list_3f(x)
|
|
return ((type(x) == "table") and (getmetatable(x) == list_mt) and x)
|
|
end
|
|
local function sym_3f(x)
|
|
return ((type(x) == "table") and (getmetatable(x) == symbol_mt) and x)
|
|
end
|
|
local function sequence_3f(x)
|
|
local mt = ((type(x) == "table") and getmetatable(x))
|
|
return (mt and (mt.sequence == sequence_marker) and x)
|
|
end
|
|
local function comment_3f(x)
|
|
return ((type(x) == "table") and (getmetatable(x) == comment_mt) and x)
|
|
end
|
|
local function table_3f(x)
|
|
return ((type(x) == "table") and (x ~= vararg) and (getmetatable(x) ~= list_mt) and (getmetatable(x) ~= symbol_mt) and not comment_3f(x) and x)
|
|
end
|
|
local function multi_sym_3f(str)
|
|
if sym_3f(str) then
|
|
return multi_sym_3f(tostring(str))
|
|
elseif (type(str) ~= "string") then
|
|
return false
|
|
else
|
|
local parts = {}
|
|
for part in str:gmatch("[^%.%:]+[%.%:]?") do
|
|
local last_char = part:sub(( - 1))
|
|
if (last_char == ":") then
|
|
parts["multi-sym-method-call"] = true
|
|
end
|
|
if ((last_char == ":") or (last_char == ".")) then
|
|
parts[(#parts + 1)] = part:sub(1, ( - 2))
|
|
else
|
|
parts[(#parts + 1)] = part
|
|
end
|
|
end
|
|
return ((#parts > 0) and (str:match("%.") or str:match(":")) and not str:match("%.%.") and (str:byte() ~= string.byte(".")) and (str:byte(( - 1)) ~= string.byte(".")) and parts)
|
|
end
|
|
end
|
|
local function quoted_3f(symbol)
|
|
return symbol.quoted
|
|
end
|
|
local function walk_tree(root, f, custom_iterator)
|
|
local function walk(iterfn, parent, idx, node)
|
|
if f(idx, node, parent) then
|
|
for k, v in iterfn(node) do
|
|
walk(iterfn, node, k, v)
|
|
end
|
|
return nil
|
|
end
|
|
end
|
|
walk((custom_iterator or pairs), nil, nil, root)
|
|
return root
|
|
end
|
|
local lua_keywords = {"and", "break", "do", "else", "elseif", "end", "false", "for", "function", "if", "in", "local", "nil", "not", "or", "repeat", "return", "then", "true", "until", "while", "goto"}
|
|
for i, v in ipairs(lua_keywords) do
|
|
lua_keywords[v] = i
|
|
end
|
|
local function valid_lua_identifier_3f(str)
|
|
return (str:match("^[%a_][%w_]*$") and not lua_keywords[str])
|
|
end
|
|
local propagated_options = {"allowedGlobals", "indent", "correlate", "useMetadata", "env", "compiler-env", "compilerEnv"}
|
|
local function propagate_options(options, subopts)
|
|
for _, name in ipairs(propagated_options) do
|
|
subopts[name] = options[name]
|
|
end
|
|
return subopts
|
|
end
|
|
local root = nil
|
|
local function _1_()
|
|
end
|
|
root = {chunk = nil, options = nil, reset = _1_, scope = nil}
|
|
root["set-reset"] = function(_2_0)
|
|
local _3_ = _2_0
|
|
local chunk = _3_["chunk"]
|
|
local options = _3_["options"]
|
|
local reset = _3_["reset"]
|
|
local scope = _3_["scope"]
|
|
root.reset = function()
|
|
root.chunk, root.scope, root.options, root.reset = chunk, scope, options, reset
|
|
return nil
|
|
end
|
|
return root.reset
|
|
end
|
|
local function hook(event, ...)
|
|
if (root.options and root.options.plugins) then
|
|
for _, plugin in ipairs(root.options.plugins) do
|
|
local _3_0 = plugin[event]
|
|
if (nil ~= _3_0) then
|
|
local f = _3_0
|
|
f(...)
|
|
end
|
|
end
|
|
return nil
|
|
end
|
|
end
|
|
return {["comment?"] = comment_3f, ["debug-on?"] = debug_on_3f, ["expr?"] = expr_3f, ["list?"] = list_3f, ["lua-keywords"] = lua_keywords, ["member?"] = member_3f, ["multi-sym?"] = multi_sym_3f, ["propagate-options"] = propagate_options, ["quoted?"] = quoted_3f, ["sequence?"] = sequence_3f, ["sym?"] = sym_3f, ["table?"] = table_3f, ["valid-lua-identifier?"] = valid_lua_identifier_3f, ["varg?"] = varg_3f, ["walk-tree"] = walk_tree, allpairs = allpairs, comment = comment_2a, copy = copy, deref = deref, expr = expr, hook = hook, kvmap = kvmap, list = list, map = map, path = table.concat({"./?.fnl", "./?/init.fnl", getenv("FENNEL_PATH")}, ";"), root = root, sequence = sequence, stablepairs = stablepairs, sym = sym, varg = varg}
|
|
end
|
|
utils = require("fennel.utils")
|
|
local parser = require("fennel.parser")
|
|
local compiler = require("fennel.compiler")
|
|
local specials = require("fennel.specials")
|
|
local repl = require("fennel.repl")
|
|
local view = require("fennel.view")
|
|
local function eval_env(env)
|
|
if (env == "_COMPILER") then
|
|
local env0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
|
|
local mt = getmetatable(env0)
|
|
mt.__index = _G
|
|
return specials["wrap-env"](env0)
|
|
else
|
|
return (env and specials["wrap-env"](env))
|
|
end
|
|
end
|
|
local function eval_opts(options, str)
|
|
local opts = utils.copy(options)
|
|
if ((opts.allowedGlobals == nil) and not getmetatable(opts.env)) then
|
|
opts.allowedGlobals = specials["current-global-names"](opts.env)
|
|
end
|
|
if (not opts.filename and not opts.source) then
|
|
opts.source = str
|
|
end
|
|
if (opts.env == "_COMPILER") then
|
|
opts.scope = compiler["make-scope"](compiler.scopes.compiler)
|
|
end
|
|
return opts
|
|
end
|
|
local function eval(str, options, ...)
|
|
local opts = eval_opts(options, str)
|
|
local env = eval_env(opts.env)
|
|
local lua_source = compiler["compile-string"](str, opts)
|
|
local loader = nil
|
|
local function _0_(...)
|
|
if opts.filename then
|
|
return ("@" .. opts.filename)
|
|
else
|
|
return str
|
|
end
|
|
end
|
|
loader = specials["load-code"](lua_source, env, _0_(...))
|
|
opts.filename = nil
|
|
return loader(...)
|
|
end
|
|
local function dofile_2a(filename, options, ...)
|
|
local opts = utils.copy(options)
|
|
local f = assert(io.open(filename, "rb"))
|
|
local source = assert(f:read("*all"), ("Could not read " .. filename))
|
|
f:close()
|
|
opts.filename = filename
|
|
return eval(source, opts, ...)
|
|
end
|
|
local mod = {["comment?"] = utils["comment?"], ["compile-stream"] = compiler["compile-stream"], ["compile-string"] = compiler["compile-string"], ["list?"] = utils["list?"], ["load-code"] = specials["load-code"], ["macro-loaded"] = specials["macro-loaded"], ["macro-searchers"] = specials["macro-searchers"], ["make-searcher"] = specials["make-searcher"], ["search-module"] = specials["search-module"], ["sequence?"] = utils["sequence?"], ["string-stream"] = parser["string-stream"], ["sym-char?"] = parser["sym-char?"], ["sym?"] = utils["sym?"], comment = utils.comment, compile = compiler.compile, compile1 = compiler.compile1, compileStream = compiler["compile-stream"], compileString = compiler["compile-string"], doc = specials.doc, dofile = dofile_2a, eval = eval, gensym = compiler.gensym, granulate = parser.granulate, list = utils.list, loadCode = specials["load-code"], macroLoaded = specials["macro-loaded"], makeSearcher = specials["make-searcher"], make_searcher = specials["make-searcher"], mangle = compiler["global-mangling"], metadata = compiler.metadata, parser = parser.parser, path = utils.path, repl = repl, scope = compiler["make-scope"], searchModule = specials["search-module"], searcher = specials["make-searcher"](), sequence = utils.sequence, stringStream = parser["string-stream"], sym = utils.sym, traceback = compiler.traceback, unmangle = compiler["global-unmangling"], varg = utils.varg, version = "0.9.1-dev", view = view}
|
|
utils["fennel-module"] = mod
|
|
do
|
|
local builtin_macros = [===[;; This module contains all the built-in Fennel macros. Unlike all the other
|
|
;; modules that are loaded by the old bootstrap compiler, this runs in the
|
|
;; compiler scope of the version of the compiler being defined.
|
|
|
|
;; The code for these macros is somewhat idiosyncratic because it cannot use any
|
|
;; macros which have not yet been defined.
|
|
|
|
;; TODO: some of these macros modify their arguments; we should stop doing that,
|
|
;; but in a way that preserves file/line metadata.
|
|
|
|
(fn ->* [val ...]
|
|
"Thread-first macro.
|
|
Take the first value and splice it into the second form as its first argument.
|
|
The value of the second form is spliced into the first arg of the third, etc."
|
|
(var x val)
|
|
(each [_ e (ipairs [...])]
|
|
(let [elt (if (list? e) e (list e))]
|
|
(table.insert elt 2 x)
|
|
(set x elt)))
|
|
x)
|
|
|
|
(fn ->>* [val ...]
|
|
"Thread-last macro.
|
|
Same as ->, except splices the value into the last position of each form
|
|
rather than the first."
|
|
(var x val)
|
|
(each [_ e (pairs [...])]
|
|
(let [elt (if (list? e) e (list e))]
|
|
(table.insert elt x)
|
|
(set x elt)))
|
|
x)
|
|
|
|
(fn -?>* [val ...]
|
|
"Nil-safe thread-first macro.
|
|
Same as -> except will short-circuit with nil when it encounters a nil value."
|
|
(if (= 0 (select "#" ...))
|
|
val
|
|
(let [els [...]
|
|
e (table.remove els 1)
|
|
el (if (list? e) e (list e))
|
|
tmp (gensym)]
|
|
(table.insert el 2 tmp)
|
|
`(let [,tmp ,val]
|
|
(if ,tmp
|
|
(-?> ,el ,(unpack els))
|
|
,tmp)))))
|
|
|
|
(fn -?>>* [val ...]
|
|
"Nil-safe thread-last macro.
|
|
Same as ->> except will short-circuit with nil when it encounters a nil value."
|
|
(if (= 0 (select "#" ...))
|
|
val
|
|
(let [els [...]
|
|
e (table.remove els 1)
|
|
el (if (list? e) e (list e))
|
|
tmp (gensym)]
|
|
(table.insert el tmp)
|
|
`(let [,tmp ,val]
|
|
(if ,tmp
|
|
(-?>> ,el ,(unpack els))
|
|
,tmp)))))
|
|
|
|
(fn ?dot [tbl k ...]
|
|
"Nil-safe table look up.
|
|
Same as . (dot), except will short-circuit with nil when it encounters
|
|
a nil value in any of subsequent keys."
|
|
(if (= nil k) tbl `(let [res# (. ,tbl ,k)]
|
|
(and res# (?. res# ,...)))))
|
|
|
|
(fn doto* [val ...]
|
|
"Evaluates val and splices it into the first argument of subsequent forms."
|
|
(let [name (gensym)
|
|
form `(let [,name ,val])]
|
|
(each [_ elt (pairs [...])]
|
|
(table.insert elt 2 name)
|
|
(table.insert form elt))
|
|
(table.insert form name)
|
|
form))
|
|
|
|
(fn when* [condition body1 ...]
|
|
"Evaluate body for side-effects only when condition is truthy."
|
|
(assert body1 "expected body")
|
|
`(if ,condition
|
|
(do
|
|
,body1
|
|
,...)))
|
|
|
|
(fn with-open* [closable-bindings ...]
|
|
"Like `let`, but invokes (v:close) on each binding after evaluating the body.
|
|
The body is evaluated inside `xpcall` so that bound values will be closed upon
|
|
encountering an error before propagating it."
|
|
(let [bodyfn `(fn []
|
|
,...)
|
|
closer `(fn close-handlers# [ok# ...]
|
|
(if ok# ... (error ... 0)))
|
|
traceback `(. (or package.loaded.fennel debug) :traceback)]
|
|
(for [i 1 (length closable-bindings) 2]
|
|
(assert (sym? (. closable-bindings i))
|
|
"with-open only allows symbols in bindings")
|
|
(table.insert closer 4 `(: ,(. closable-bindings i) :close)))
|
|
`(let ,closable-bindings
|
|
,closer
|
|
(close-handlers# (xpcall ,bodyfn ,traceback)))))
|
|
|
|
(fn collect* [iter-tbl key-value-expr ...]
|
|
"Returns a table made by running an iterator and evaluating an expression
|
|
that returns key-value pairs to be inserted sequentially into the table.
|
|
This can be thought of as a \"table comprehension\". The provided key-value
|
|
expression must return either 2 values, or nil.
|
|
|
|
For example,
|
|
(collect [k v (pairs {:apple \"red\" :orange \"orange\"})]
|
|
(values v k))
|
|
returns
|
|
{:red \"apple\" :orange \"orange\"}"
|
|
(assert (and (sequence? iter-tbl) (>= (length iter-tbl) 2))
|
|
"expected iterator binding table")
|
|
(assert (not= nil key-value-expr) "expected key-value expression")
|
|
(assert (= nil ...)
|
|
"expected exactly one body expression. Wrap multiple expressions with do")
|
|
`(let [tbl# {}]
|
|
(each ,iter-tbl
|
|
(match ,key-value-expr
|
|
(k# v#) (tset tbl# k# v#)))
|
|
tbl#))
|
|
|
|
(fn icollect* [iter-tbl value-expr ...]
|
|
"Returns a sequential table made by running an iterator and evaluating an
|
|
expression that returns values to be inserted sequentially into the table.
|
|
This can be thought of as a \"list comprehension\".
|
|
|
|
For example,
|
|
(icollect [_ v (ipairs [1 2 3 4 5])] (when (> v 2) (* v v)))
|
|
returns
|
|
[9 16 25]"
|
|
(assert (and (sequence? iter-tbl) (>= (length iter-tbl) 2))
|
|
"expected iterator binding table")
|
|
(assert (not= nil value-expr) "expected table value expression")
|
|
(assert (= nil ...)
|
|
"expected exactly one body expression. Wrap multiple expressions with do")
|
|
`(let [tbl# []]
|
|
(each ,iter-tbl
|
|
(tset tbl# (+ (length tbl#) 1) ,value-expr))
|
|
tbl#))
|
|
|
|
(fn partial* [f ...]
|
|
"Returns a function with all arguments partially applied to f."
|
|
(assert f "expected a function to partially apply")
|
|
(let [body (list f ...)]
|
|
(table.insert body _VARARG)
|
|
`(fn [,_VARARG]
|
|
,body)))
|
|
|
|
(fn pick-args* [n f]
|
|
"Creates a function of arity n that applies its arguments to f.
|
|
|
|
For example,
|
|
(pick-args 2 func)
|
|
expands to
|
|
(fn [_0_ _1_] (func _0_ _1_))"
|
|
(assert (and (= (type n) :number) (= n (math.floor n)) (>= n 0))
|
|
(.. "Expected n to be an integer literal >= 0, got " (tostring n)))
|
|
(let [bindings []]
|
|
(for [i 1 n]
|
|
(tset bindings i (gensym)))
|
|
`(fn ,bindings
|
|
(,f ,(unpack bindings)))))
|
|
|
|
(fn pick-values* [n ...]
|
|
"Like the `values` special, but emits exactly n values.
|
|
|
|
For example,
|
|
(pick-values 2 ...)
|
|
expands to
|
|
(let [(_0_ _1_) ...]
|
|
(values _0_ _1_))"
|
|
(assert (and (= :number (type n)) (>= n 0) (= n (math.floor n)))
|
|
(.. "Expected n to be an integer >= 0, got " (tostring n)))
|
|
(let [let-syms (list)
|
|
let-values (if (= 1 (select "#" ...)) ... `(values ,...))]
|
|
(for [i 1 n]
|
|
(table.insert let-syms (gensym)))
|
|
(if (= n 0) `(values)
|
|
`(let [,let-syms ,let-values]
|
|
(values ,(unpack let-syms))))))
|
|
|
|
(fn lambda* [...]
|
|
"Function literal with arity checking.
|
|
Will throw an exception if a declared argument is passed in as nil, unless
|
|
that argument name begins with ?."
|
|
(let [args [...]
|
|
has-internal-name? (sym? (. args 1))
|
|
arglist (if has-internal-name? (. args 2) (. args 1))
|
|
docstring-position (if has-internal-name? 3 2)
|
|
has-docstring? (and (> (length args) docstring-position)
|
|
(= :string (type (. args docstring-position))))
|
|
arity-check-position (- 4 (if has-internal-name? 0 1)
|
|
(if has-docstring? 0 1))
|
|
empty-body? (< (length args) arity-check-position)]
|
|
(fn check! [a]
|
|
(if (table? a)
|
|
(each [_ a (pairs a)]
|
|
(check! a))
|
|
(let [as (tostring a)]
|
|
(and (not (as:match "^?")) (not= as "&") (not= as "_")
|
|
(not= as "...")))
|
|
(table.insert args arity-check-position
|
|
`(assert (not= nil ,a)
|
|
(string.format "Missing argument %s on %s:%s"
|
|
,(tostring a)
|
|
,(or a.filename :unknown)
|
|
,(or a.line "?"))))))
|
|
|
|
(assert (= :table (type arglist)) "expected arg list")
|
|
(each [_ a (ipairs arglist)]
|
|
(check! a))
|
|
(if empty-body?
|
|
(table.insert args (sym :nil)))
|
|
`(fn ,(unpack args))))
|
|
|
|
(fn macro* [name ...]
|
|
"Define a single macro."
|
|
(assert (sym? name) "expected symbol for macro name")
|
|
(local args [...])
|
|
`(macros {,(tostring name) (fn ,(unpack args))}))
|
|
|
|
(fn macrodebug* [form return?]
|
|
"Print the resulting form after performing macroexpansion.
|
|
With a second argument, returns expanded form as a string instead of printing."
|
|
(let [handle (if return? `do `print)]
|
|
`(,handle ,(view (macroexpand form _SCOPE)))))
|
|
|
|
(fn import-macros* [binding1 module-name1 ...]
|
|
"Binds a table of macros from each macro module according to a binding form.
|
|
Each binding form can be either a symbol or a k/v destructuring table.
|
|
Example:
|
|
(import-macros mymacros :my-macros ; bind to symbol
|
|
{:macro1 alias : macro2} :proj.macros) ; import by name"
|
|
(assert (and binding1 module-name1 (= 0 (% (select "#" ...) 2)))
|
|
"expected even number of binding/modulename pairs")
|
|
(for [i 1 (select "#" binding1 module-name1 ...) 2]
|
|
(let [(binding modname) (select i binding1 module-name1 ...)
|
|
;; generate a subscope of current scope, use require-macros
|
|
;; to bring in macro module. after that, we just copy the
|
|
;; macros from subscope to scope.
|
|
scope (get-scope)
|
|
subscope (fennel.scope scope)]
|
|
(_SPECIALS.require-macros `(require-macros ,modname) subscope {} ast)
|
|
(if (sym? binding)
|
|
;; bind whole table of macros to table bound to symbol
|
|
(do
|
|
(tset scope.macros (. binding 1) {})
|
|
(each [k v (pairs subscope.macros)]
|
|
(tset (. scope.macros (. binding 1)) k v)))
|
|
;; 1-level table destructuring for importing individual macros
|
|
(table? binding)
|
|
(each [macro-name [import-key] (pairs binding)]
|
|
(assert (= :function (type (. subscope.macros macro-name)))
|
|
(.. "macro " macro-name " not found in module "
|
|
(tostring modname)))
|
|
(tset scope.macros import-key (. subscope.macros macro-name))))))
|
|
nil)
|
|
|
|
;;; Pattern matching
|
|
|
|
(fn match-values [vals pattern unifications match-pattern]
|
|
(let [condition `(and)
|
|
bindings []]
|
|
(each [i pat (ipairs pattern)]
|
|
(let [(subcondition subbindings) (match-pattern [(. vals i)] pat
|
|
unifications)]
|
|
(table.insert condition subcondition)
|
|
(each [_ b (ipairs subbindings)]
|
|
(table.insert bindings b))))
|
|
(values condition bindings)))
|
|
|
|
(fn match-table [val pattern unifications match-pattern]
|
|
(let [condition `(and (= (type ,val) :table))
|
|
bindings []]
|
|
(each [k pat (pairs pattern)]
|
|
(if (= pat `&)
|
|
(do
|
|
(assert (= nil (. pattern (+ k 2)))
|
|
"expected & rest argument before last parameter")
|
|
(table.insert bindings (. pattern (+ k 1)))
|
|
(table.insert bindings
|
|
[`(select ,k ((or table.unpack _G.unpack) ,val))]))
|
|
(= k `&as)
|
|
(do
|
|
(table.insert bindings pat)
|
|
(table.insert bindings val))
|
|
(and (= :number (type k)) (= `&as pat))
|
|
(do
|
|
(assert (= nil (. pattern (+ k 2)))
|
|
"expected &as argument before last parameter")
|
|
(table.insert bindings (. pattern (+ k 1)))
|
|
(table.insert bindings val))
|
|
;; don't process the pattern right after &/&as; already got it
|
|
(or (not= :number (type k)) (and (not= `&as (. pattern (- k 1)))
|
|
(not= `& (. pattern (- k 1)))))
|
|
(let [subval `(. ,val ,k)
|
|
(subcondition subbindings) (match-pattern [subval] pat
|
|
unifications)]
|
|
(table.insert condition subcondition)
|
|
(each [_ b (ipairs subbindings)]
|
|
(table.insert bindings b)))))
|
|
(values condition bindings)))
|
|
|
|
(fn match-pattern [vals pattern unifications]
|
|
"Takes the AST of values and a single pattern and returns a condition
|
|
to determine if it matches as well as a list of bindings to
|
|
introduce for the duration of the body if it does match."
|
|
;; we have to assume we're matching against multiple values here until we
|
|
;; know we're either in a multi-valued clause (in which case we know the #
|
|
;; of vals) or we're not, in which case we only care about the first one.
|
|
(let [[val] vals]
|
|
(if (or (and (sym? pattern) ; unification with outer locals (or nil)
|
|
(not= "_" (tostring pattern)) ; never unify _
|
|
(or (in-scope? pattern) (= :nil (tostring pattern))))
|
|
(and (multi-sym? pattern) (in-scope? (. (multi-sym? pattern) 1))))
|
|
(values `(= ,val ,pattern) [])
|
|
;; unify a local we've seen already
|
|
(and (sym? pattern) (. unifications (tostring pattern)))
|
|
(values `(= ,(. unifications (tostring pattern)) ,val) [])
|
|
;; bind a fresh local
|
|
(sym? pattern)
|
|
(let [wildcard? (: (tostring pattern) :find "^_")]
|
|
(if (not wildcard?) (tset unifications (tostring pattern) val))
|
|
(values (if (or wildcard? (string.find (tostring pattern) "^?")) true
|
|
`(not= ,(sym :nil) ,val)) [pattern val]))
|
|
;; guard clause
|
|
(and (list? pattern) (= (. pattern 2) `?))
|
|
(let [(pcondition bindings) (match-pattern vals (. pattern 1)
|
|
unifications)
|
|
condition `(and ,pcondition)]
|
|
(for [i 3 (length pattern)] ; splice in guard clauses
|
|
(table.insert condition (. pattern i)))
|
|
(values `(let ,bindings
|
|
,condition) bindings))
|
|
;; multi-valued patterns (represented as lists)
|
|
(list? pattern)
|
|
(match-values vals pattern unifications match-pattern)
|
|
;; table patterns
|
|
(= (type pattern) :table)
|
|
(match-table val pattern unifications match-pattern)
|
|
;; literal value
|
|
(values `(= ,val ,pattern) []))))
|
|
|
|
(fn match-condition [vals clauses]
|
|
"Construct the actual `if` AST for the given match values and clauses."
|
|
(if (not= 0 (% (length clauses) 2)) ; treat odd final clause as default
|
|
(table.insert clauses (length clauses) (sym "_")))
|
|
(let [out `(if)]
|
|
(for [i 1 (length clauses) 2]
|
|
(let [pattern (. clauses i)
|
|
body (. clauses (+ i 1))
|
|
(condition bindings) (match-pattern vals pattern {})]
|
|
(table.insert out condition)
|
|
(table.insert out `(let ,bindings
|
|
,body))))
|
|
out))
|
|
|
|
(fn match-val-syms [clauses]
|
|
"How many multi-valued clauses are there? return a list of that many gensyms."
|
|
(let [syms (list (gensym))]
|
|
(for [i 1 (length clauses) 2]
|
|
(if (list? (. clauses i))
|
|
(each [valnum (ipairs (. clauses i))]
|
|
(if (not (. syms valnum))
|
|
(tset syms valnum (gensym))))))
|
|
syms))
|
|
|
|
(fn match* [val ...]
|
|
;; Old implementation of match macro, which doesn't directly support
|
|
;; `where' and `or'. New syntax is implemented in `match-where',
|
|
;; which simply generates old syntax and feeds it to `match*'.
|
|
(let [clauses [...]
|
|
vals (match-val-syms clauses)]
|
|
;; protect against multiple evaluation of the value, bind against as
|
|
;; many values as we ever match against in the clauses.
|
|
(list `let [vals val] (match-condition vals clauses))))
|
|
|
|
;; Construction of old match syntax from new syntax
|
|
|
|
(fn partition-2 [seq]
|
|
;; Partition `seq` by 2.
|
|
;; If `seq` has odd amount of elements, the last one is dropped.
|
|
;;
|
|
;; Input: [1 2 3 4 5]
|
|
;; Output: [[1 2] [3 4]]
|
|
(let [firsts []
|
|
seconds []
|
|
res []]
|
|
(for [i 1 (length seq) 2]
|
|
(let [first (. seq i)
|
|
second (. seq (+ i 1))]
|
|
(table.insert firsts (if (not= nil first) first `nil))
|
|
(table.insert seconds (if (not= nil second) second `nil))))
|
|
(each [i v1 (ipairs firsts)]
|
|
(let [v2 (. seconds i)]
|
|
(if (not= nil v2)
|
|
(table.insert res [v1 v2]))))
|
|
res))
|
|
|
|
(fn transform-or [[_ & pats] guards]
|
|
;; Transforms `(or pat pats*)` lists into match `guard` patterns.
|
|
;;
|
|
;; (or pat1 pat2), guard => [(pat1 ? guard) (pat2 ? guard)]
|
|
(let [res []]
|
|
(each [_ pat (ipairs pats)]
|
|
(table.insert res (list pat `? (unpack guards))))
|
|
res))
|
|
|
|
(fn transform-cond [cond]
|
|
;; Transforms `where` cond into sequence of `match` guards.
|
|
;;
|
|
;; pat => [pat]
|
|
;; (where pat guard) => [(pat ? guard)]
|
|
;; (where (or pat1 pat2) guard) => [(pat1 ? guard) (pat2 ? guard)]
|
|
(if (and (list? cond) (= (. cond 1) `where))
|
|
(let [second (. cond 2)]
|
|
(if (and (list? second) (= (. second 1) `or))
|
|
(transform-or second [(unpack cond 3)])
|
|
:else
|
|
[(list second `? (unpack cond 3))]))
|
|
:else
|
|
[cond]))
|
|
|
|
(fn match-where [val ...]
|
|
"Perform pattern matching on val. See reference for details.
|
|
|
|
Syntax:
|
|
|
|
(match data-expression
|
|
pattern body
|
|
(where pattern guard guards*) body
|
|
(where (or pattern patterns*) guard guards*) body)"
|
|
(let [conds-bodies (partition-2 [...])
|
|
else-branch (if (not= 0 (% (select "#" ...) 2))
|
|
(select (select "#" ...) ...))
|
|
match-body []]
|
|
(each [_ [cond body] (ipairs conds-bodies)]
|
|
(each [_ cond (ipairs (transform-cond cond))]
|
|
(table.insert match-body cond)
|
|
(table.insert match-body body)))
|
|
(if else-branch
|
|
(table.insert match-body else-branch))
|
|
(match* val (unpack match-body))))
|
|
|
|
{:-> ->*
|
|
:->> ->>*
|
|
:-?> -?>*
|
|
:-?>> -?>>*
|
|
:?. ?dot
|
|
:doto doto*
|
|
:when when*
|
|
:with-open with-open*
|
|
:collect collect*
|
|
:icollect icollect*
|
|
:partial partial*
|
|
:lambda lambda*
|
|
:pick-args pick-args*
|
|
:pick-values pick-values*
|
|
:macro macro*
|
|
:macrodebug macrodebug*
|
|
:import-macros import-macros*
|
|
:match match-where}
|
|
]===]
|
|
local module_name = "fennel.macros"
|
|
local _ = nil
|
|
local function _0_()
|
|
return mod
|
|
end
|
|
package.preload[module_name] = _0_
|
|
_ = nil
|
|
local env = nil
|
|
do
|
|
local _1_0 = specials["make-compiler-env"](nil, compiler.scopes.compiler, {})
|
|
_1_0["utils"] = utils
|
|
_1_0["fennel"] = mod
|
|
env = _1_0
|
|
end
|
|
local built_ins = eval(builtin_macros, {allowedGlobals = false, env = env, filename = "src/fennel/macros.fnl", moduleName = module_name, scope = compiler.scopes.compiler, useMetadata = true})
|
|
for k, v in pairs(built_ins) do
|
|
compiler.scopes.global.macros[k] = v
|
|
end
|
|
compiler.scopes.global.macros["\206\187"] = compiler.scopes.global.macros.lambda
|
|
package.preload[module_name] = nil
|
|
end
|
|
return mod
|