790 lines
36 KiB
Plaintext
790 lines
36 KiB
Plaintext
-- This file contains the source code of the Nomsu compiler.
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-- Nomsu is a programming language that cross-compiles to Lua. It was designed to be good
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-- at natural-language-like code that is highly self-modifying and flexible.
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-- The only dependency is LPEG, which can be installed using "luarocks install lpeg"
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-- File usage:
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-- Either, in a lua/moonscript file:
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-- Nomsu = require "nomsu"
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-- nomsu = Nomsu()
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-- nomsu:run(your_nomsu_code)
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-- Or from the command line:
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-- lua nomsu.lua your_file.nom
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lpeg = require 'lpeg'
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re = require 're'
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utils = require 'utils'
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files = require 'files'
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{:repr, :stringify, :equivalent} = utils
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export colors, colored
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colors = require 'consolecolors'
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colored = setmetatable({}, {__index:(_,color)-> ((msg)-> colors[color]..tostring(msg or '')..colors.reset)})
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{:insert, :remove, :concat} = table
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unpack or= table.unpack
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{:match, :sub, :gsub, :format, :byte, :find} = string
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{:NomsuCode, :LuaCode, :Source} = require "code_obj"
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AST = require "nomsu_tree"
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Parser = require("parser")
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-- Mapping from source string (e.g. "@core/metaprogramming.nom[1:100]") to a mapping
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-- from lua line number to nomsu line number
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export SOURCE_MAP
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SOURCE_MAP = {}
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string.as_lua_id = (str)->
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argnum = 0
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-- Cut up escape-sequence-like chunks
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str = gsub str, "x([0-9A-F][0-9A-F])", "x\0%1"
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-- Alphanumeric unchanged, spaces to underscores, and everything else to hex escape sequences
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str = gsub str, "%W", (c)->
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if c == ' ' then '_'
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elseif c == '%' then
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argnum += 1
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tostring(argnum)
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else format("x%02X", byte(c))
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return '_'..str
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table.map = (fn)=> [fn(v) for _,v in ipairs(@)]
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table.fork = (t, values)-> setmetatable(values or {}, {__index:t})
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-- TODO:
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-- consider non-linear codegen, rather than doing thunks for things like comprehensions
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-- Add a ((%x foo %y) where {x:"asdf", y:"fdsa"}) compile-time action for substitution
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-- Re-implement nomsu-to-lua comment translation?
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-- Use + operator for string coercive concatenation (note: "asdf" + 3 == "asdf3")
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-- Use [] for accessing string characters, or s[{3,4}] for s:sub(3,4)
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-- Note: This globally affects all strings in this instance of Lua!
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do
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STRING_METATABLE = getmetatable("")
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STRING_METATABLE.__add = (other)=> @ .. stringify(other)
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STRING_METATABLE.__index = (i)=>
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ret = string[i]
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if ret != nil then return ret
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if type(i) == 'number' then return sub(@, i, i)
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elseif type(i) == 'table' then return sub(@, i[1], i[2])
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-- List and Dict classes to provide basic equality/tostring functionality for the tables
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-- used in Nomsu. This way, they retain a notion of whether they were originally lists or dicts.
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_list_mt =
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__eq:equivalent
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-- Could consider adding a __newindex to enforce list-ness, but would hurt performance
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__tostring: =>
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"["..concat([repr(b) for b in *@], ", ").."]"
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__lt: (other)=>
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assert type(@) == 'table' and type(other) == 'table', "Incompatible types for comparison"
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for i=1,math.max(#@, #other)
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if @[i] < other[i] then return true
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elseif @[i] > other[i] then return false
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return false
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__le: (other)=>
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assert type(@) == 'table' and type(other) == 'table', "Incompatible types for comparison"
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for i=1,math.max(#@, #other)
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if @[i] < other[i] then return true
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elseif @[i] > other[i] then return false
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return true
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list = (t)-> setmetatable(t, _list_mt)
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_dict_mt =
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__eq:equivalent
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__tostring: =>
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"{"..concat(["#{repr(k)}: #{repr(v)}" for k,v in pairs @], ", ").."}"
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dict = (t)-> setmetatable(t, _dict_mt)
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MAX_LINE = 80 -- For beautification purposes, try not to make lines much longer than this value
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NomsuCompiler = setmetatable({}, {__index: (k)=> if _self = rawget(@, "self") then _self[k] else nil})
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with NomsuCompiler
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.NOMSU_COMPILER_VERSION = 3
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.NOMSU_SYNTAX_VERSION = Parser.version
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._ENV = NomsuCompiler
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.nomsu = NomsuCompiler
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.parse = (...)=> Parser.parse(...)
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.can_optimize = -> false
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-- Discretionary/convenience stuff
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to_add = {
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repr:repr, stringify:stringify, utils:utils, lpeg:lpeg, re:re, files:files,
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-- Lua stuff:
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:next, :unpack, :setmetatable, :coroutine, :rawequal, :getmetatable, :pcall,
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:error, :package, :os, :require, :tonumber, :tostring, :string, :xpcall, :module,
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:print, :loadfile, :rawset, :_VERSION, :collectgarbage, :rawget, :rawlen,
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:table, :assert, :dofile, :loadstring, :type, :select, :debug, :math, :io, :load,
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:pairs, :ipairs,
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-- Nomsu types:
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:list, :dict,
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}
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for k,v in pairs(to_add) do NomsuCompiler[k] = v
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for k,v in pairs(AST) do NomsuCompiler[k] = v
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.LuaCode = LuaCode
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.NomsuCode = NomsuCode
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.Source = Source
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.ALIASES = setmetatable({}, {__mode:"k"})
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.LOADED = {}
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.AST = AST
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.compile_error = (tok, err_format_string, ...)=>
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file = files.read(tok.source.filename)
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line_starts = files.get_line_starts(file)
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line_no = files.get_line_number(file, tok.source.start)
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line_start = line_starts[line_no]
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src = colored.dim(file\sub(line_start, tok.source.start-1))
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src ..= colored.underscore colored.bright colored.red(file\sub(tok.source.start, tok.source.stop-1))
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end_of_line = (line_starts[files.get_line_number(file, tok.source.stop) + 1] or 0) - 1
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src ..= colored.dim(file\sub(tok.source.stop, end_of_line-1))
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src = ' '..src\gsub('\n', '\n ')
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err_msg = err_format_string\format(src, ...)
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error("#{tok.source.filename}:#{line_no}: "..err_msg, 0)
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-- This is a bit of a hack, but this code handles arbitrarily complex
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-- math expressions like 2*x + 3^2 without having to define a single
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-- action for every possibility.
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math_expression = re.compile [[ ([+-] " ")* "%" (" " [*/^+-] (" " [+-])* " %")+ !. ]]
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add_lua_bits = (lua, code)=>
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for bit in *code
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if type(bit) == "string"
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lua\append bit
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else
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bit_lua = @compile(bit)
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unless bit_lua.is_value
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@compile_error bit,
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"Cannot use:\n%s\nas a string interpolation value, since it's not an expression."
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lua\append bit_lua
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return lua
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add_lua_string_bits = (lua, code)=>
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line_len = 0
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if code.type != "Text"
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lua\append ", ", @compile(code)
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return
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for bit in *code
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bit_lua = if type(bit) == "string"
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repr(bit)
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else
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bit_lua = @compile(bit)
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unless bit_lua.is_value
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@compile_error bit,
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"Cannot use:\n%s\nas a string interpolation value, since it's not an expression."
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bit_lua
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line_len += #tostring(bit_lua)
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if line_len > MAX_LINE
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lua\append ",\n "
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line_len = 4
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else
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lua\append ", "
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lua\append bit_lua
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.COMPILE_ACTIONS = setmetatable {
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["# compile math expr #"]: (tree, ...)=>
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lua = LuaCode.Value(tree.source)
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for i,tok in ipairs tree
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if type(tok) == 'string'
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lua\append tok
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else
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tok_lua = @compile(tok)
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unless tok_lua.is_value
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@compile_error tok, "Non-expression value inside math expression:\n%s"
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if tok.type == "Action"
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tok_lua\parenthesize!
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lua\append tok_lua
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if i < #tree
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lua\append " "
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return lua
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["Lua %"]: (tree, _code)=>
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lua = LuaCode.Value(_code.source, "LuaCode(", repr(tostring _code.source))
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add_lua_string_bits(@, lua, _code)
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lua\append ")"
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return lua
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["Lua value %"]: (tree, _code)=>
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lua = LuaCode.Value(_code.source, "LuaCode.Value(", repr(tostring _code.source))
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add_lua_string_bits(@, lua, _code)
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lua\append ")"
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return lua
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["lua > %"]: (tree, _code)=>
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if _code.type != "Text"
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return LuaCode tree.source, "nomsu:run_lua(", @compile(_code), ");"
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return add_lua_bits(@, LuaCode(tree.source), _code)
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["= lua %"]: (tree, _code)=>
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if _code.type != "Text"
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return LuaCode.Value tree.source, "nomsu:run_lua(", @compile(_code), ":as_statements('return '))"
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return add_lua_bits(@, LuaCode.Value(tree.source), _code)
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["use %"]: (tree, _path)=>
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if _path.type == 'Text' and #_path == 1 and type(_path[1]) == 'string'
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path = _path[1]
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for f in files.walk(path)
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@run_file(f)
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return LuaCode(tree.source, "for f in files.walk(", @compile(_path), ") do nomsu:run_file(f) end")
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}, {
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__index: (stub)=>
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if math_expression\match(stub)
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return @["# compile math expr #"]
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}
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.run = (to_run, source=nil)=>
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source or= to_run.source or Source(to_run, 1, #to_run)
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if not files.read(source.filename) then files.spoof(source.filename, to_run)
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tree = if AST.is_syntax_tree(to_run) then to_run else @parse(to_run, source)
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if tree == nil -- Happens if pattern matches, but there are no captures, e.g. an empty string
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return nil
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if tree.type == "FileChunks"
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-- Each chunk's compilation is affected by the code in the previous chunks
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-- (typically), so each chunk needs to compile and run before the next one
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-- compiles.
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ret = nil
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all_lua = {}
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for chunk in *tree
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lua = @compile(chunk)\as_statements("return ")
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lua\declare_locals!
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lua\prepend "-- File: #{source.filename\gsub("\n.*", "...")}\n"
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insert all_lua, tostring(lua)
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ret = @run_lua(lua)
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return ret
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else
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lua = @compile(tree)\as_statements("return ")
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lua\declare_locals!
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lua\prepend "-- File: #{source.filename\gsub("\n.*", "...")}\n"
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return @run_lua(lua)
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_running_files = {} -- For detecting circular imports
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.run_file = (filename)=>
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if @LOADED[filename]
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return @LOADED[filename]
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-- Check for circular import
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-- TODO: optimize?
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for i,running in ipairs _running_files
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if running == filename
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loop = [_running_files[j] for j=i,#_running_files]
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insert loop, filename
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error("Circular import, this loops forever: #{concat loop, " -> "}...")
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insert _running_files, filename
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ret = nil
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if match(filename, "%.lua$")
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file = assert(files.read(filename), "Could not find file: #{filename}")
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ret = @run_lua file, Source(filename, 1, #file)
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elseif match(filename, "%.nom$") or match(filename, "^/dev/fd/[012]$")
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ran_lua = if @.can_optimize(filename) -- Look for precompiled version
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lua_filename = gsub(filename, "%.nom$", ".lua")
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if file = files.read(lua_filename)
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ret = @run_lua file, Source(lua_filename, 1, #file)
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true
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unless ran_lua
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file = files.read(filename)
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if not file
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error("File does not exist: #{filename}", 0)
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ret = @run file, Source(filename,1,#file)
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else
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error("Invalid filetype for #{filename}", 0)
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@LOADED[filename] = ret or true
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remove _running_files
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@LOADED[filename] = ret or true
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return ret
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.run_lua = (lua, source=nil)=>
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lua_string = tostring(lua)
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run_lua_fn, err = load(lua_string, nil and tostring(source or lua.source), "t", self)
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if not run_lua_fn
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line_numbered_lua = concat(
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[format("%3d|%s",i,line) for i, line in ipairs files.get_lines(lua_string)],
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"\n")
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error("Failed to compile generated code:\n#{colored.bright colored.blue colored.onblack line_numbered_lua}\n\n#{err}", 0)
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source_key = tostring(source or lua.source)
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unless SOURCE_MAP[source_key]
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map = {}
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offset = 1
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source or= lua.source
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file = files.read(source.filename)
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if not file
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error "Failed to find file: #{source.filename}"
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nomsu_str = tostring(file\sub(source.start, source.stop))
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lua_line = 1
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nomsu_line = files.get_line_number(nomsu_str, source.start)
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fn = (s)->
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if type(s) == 'string'
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for nl in s\gmatch("\n")
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map[lua_line] or= nomsu_line
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lua_line += 1
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else
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old_line = nomsu_line
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if s.source
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nomsu_line = files.get_line_number(nomsu_str, s.source.start)
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for b in *s.bits do fn(b)
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fn(lua)
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map[lua_line] or= nomsu_line
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map[0] = 0
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-- Mapping from lua line number to nomsu line numbers
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SOURCE_MAP[source_key] = map
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return run_lua_fn!
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.compile = (tree)=>
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if tree.version
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if upgrade = @['A'..string.as_lua_id("upgrade 1 from 2")]
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tree = upgrade(tree, tree.version)
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switch tree.type
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when "Action"
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stub = tree.stub
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if compile_action = @COMPILE_ACTIONS[stub]
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args = [arg for arg in *tree when type(arg) != "string"]
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-- Force Lua to avoid tail call optimization for debugging purposes
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-- TODO: use tail call?
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ret = compile_action(@, tree, unpack(args))
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if not ret
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@compile_error tree,
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"Compile-time action:\n%s\nfailed to produce any Lua"
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return ret
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lua = LuaCode.Value(tree.source, "A",string.as_lua_id(stub),"(")
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args = {}
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for i, tok in ipairs tree
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if type(tok) == "string" then continue
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arg_lua = @compile(tok)
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unless arg_lua.is_value
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@compile_error tok,
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"Cannot use:\n%s\nas an argument to %s, since it's not an expression, it produces: %s",
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stub, repr arg_lua
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insert args, arg_lua
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lua\concat_append args, ", "
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lua\append ")"
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return lua
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when "EscapedNomsu"
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make_tree = (t)->
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unless AST.is_syntax_tree(t)
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return repr(t)
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bits = [make_tree(bit) for bit in *t]
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return t.type.."("..repr(tostring t.source)..", "..table.concat(bits, ", ")..")"
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return LuaCode.Value tree.source, make_tree(tree[1])
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when "Block"
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lua = LuaCode(tree.source)
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lua\concat_append([@compile(line)\as_statements! for line in *tree], "\n")
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return lua
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when "Text"
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lua = LuaCode.Value(tree.source)
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string_buffer = ""
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for i, bit in ipairs tree
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if type(bit) == "string"
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string_buffer ..= bit
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continue
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if string_buffer ~= ""
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if #lua.bits > 0 then lua\append ".."
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lua\append repr(string_buffer)
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string_buffer = ""
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bit_lua = @compile(bit)
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unless bit_lua.is_value
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src = ' '..gsub(tostring(recurse(bit)), '\n','\n ')
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line = "#{bit.source.filename}:#{files.get_line_number(files.read(bit.source.filename), bit.source.start)}"
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@compile_error bit,
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"Cannot use:\n%s\nas a string interpolation value, since it's not an expression."
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if #lua.bits > 0 then lua\append ".."
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if bit.type != "Text"
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bit_lua = LuaCode.Value(bit.source, "stringify(",bit_lua,")")
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lua\append bit_lua
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if string_buffer ~= "" or #lua.bits == 0
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if #lua.bits > 0 then lua\append ".."
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lua\append repr(string_buffer)
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if #lua.bits > 1
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lua\parenthesize!
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return lua
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when "List"
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lua = LuaCode.Value tree.source, "list{"
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items = {}
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for i, item in ipairs tree
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item_lua = @compile(item)
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unless item_lua.is_value
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@compile_error item,
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"Cannot use:\n%s\nas a list item, since it's not an expression."
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items[i] = item_lua
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lua\concat_append(items, ", ", ",\n ")
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lua\append "}"
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return lua
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when "Dict"
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lua = LuaCode.Value tree.source, "dict{"
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lua\concat_append([@compile(e) for e in *tree], ", ", ",\n ")
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lua\append "}"
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return lua
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when "DictEntry"
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key, value = tree[1], tree[2]
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key_lua = @compile(key)
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unless key_lua.is_value
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@compile_error tree[1],
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"Cannot use:\n%s\nas a dict key, since it's not an expression."
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value_lua = value and @compile(value) or LuaCode.Value(key.source, "true")
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unless value_lua.is_value
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@compile_error tree[2],
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"Cannot use:\n%s\nas a dict value, since it's not an expression."
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-- TODO: support arbitrary words here, like operators and unicode
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key_str = match(tostring(key_lua), [=[["']([a-zA-Z_][a-zA-Z0-9_]*)['"]]=])
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return if key_str
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LuaCode tree.source, key_str,"=",value_lua
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elseif sub(tostring(key_lua),1,1) == "["
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-- NOTE: this *must* use a space after the [ to avoid freaking out
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-- Lua's parser if the inner expression is a long string. Lua
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-- parses x[[[y]]] as x("[y]"), not as x["y"]
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LuaCode tree.source, "[ ",key_lua,"]=",value_lua
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else
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LuaCode tree.source, "[",key_lua,"]=",value_lua
|
|
|
|
when "IndexChain"
|
|
lua = @compile(tree[1])
|
|
unless lua.is_value
|
|
@compile_error tree[1],
|
|
"Cannot index:\n%s\nsince it's not an expression."
|
|
first_char = sub(tostring(lua),1,1)
|
|
if first_char == "{" or first_char == '"' or first_char == "["
|
|
lua\parenthesize!
|
|
|
|
for i=2,#tree
|
|
key = tree[i]
|
|
key_lua = @compile(key)
|
|
unless key_lua.is_value
|
|
@compile_error key,
|
|
"Cannot use:\n%s\nas an index, since it's not an expression."
|
|
key_lua_str = tostring(key_lua)
|
|
if lua_id = match(key_lua_str, "^['\"]([a-zA-Z_][a-zA-Z0-9_]*)['\"]$")
|
|
lua\append ".#{lua_id}"
|
|
elseif sub(key_lua_str,1,1) == '['
|
|
-- NOTE: this *must* use a space after the [ to avoid freaking out
|
|
-- Lua's parser if the inner expression is a long string. Lua
|
|
-- parses x[[[y]]] as x("[y]"), not as x["y"]
|
|
lua\append "[ ",key_lua," ]"
|
|
else
|
|
lua\append "[",key_lua,"]"
|
|
return lua
|
|
|
|
when "Number"
|
|
return LuaCode.Value(tree.source, tostring(tree[1]))
|
|
|
|
when "Var"
|
|
return LuaCode.Value(tree.source, string.as_lua_id(tree[1]))
|
|
|
|
when "FileChunks"
|
|
error("Cannot convert FileChunks to a single block of lua, since each chunk's "..
|
|
"compilation depends on the earlier chunks")
|
|
|
|
else
|
|
error("Unknown type: #{tree.type}")
|
|
|
|
.tree_to_nomsu = (tree, options)=>
|
|
options or= {}
|
|
comments = options.comments
|
|
if comments == nil and tree.comments
|
|
comments = [{comment:c, pos:p} for p,c in pairs tree.comments]
|
|
table.sort comments, (a,b)-> a.pos > b.pos
|
|
recurse = (t, opts)->
|
|
opts or= {}
|
|
opts.comments = comments
|
|
return @tree_to_nomsu(t, opts)
|
|
pop_comments = (pos)->
|
|
return '' unless comments
|
|
nomsu = NomsuCode(tree.source)
|
|
while #comments > 0 and comments[#comments].pos <= pos
|
|
comment = table.remove comments
|
|
nomsu\append "#"..(gsub(comment.comment, "\n", "\n ")).."\n"
|
|
if #nomsu.bits == 0 then return ''
|
|
return nomsu
|
|
|
|
inline, can_use_colon = options.inline, options.can_use_colon
|
|
switch tree.type
|
|
when "FileChunks"
|
|
return nil if inline
|
|
nomsu = NomsuCode(tree.source)
|
|
for i, chunk in ipairs tree
|
|
if i > 1
|
|
nomsu\append "\n\n#{("~")\rep(80)}\n\n"
|
|
nomsu\append pop_comments(chunk.source.start)
|
|
nomsu\append recurse(chunk)
|
|
return nomsu
|
|
|
|
when "Action"
|
|
if inline
|
|
nomsu = NomsuCode(tree.source)
|
|
for i,bit in ipairs tree
|
|
if type(bit) == "string"
|
|
if i > 1
|
|
nomsu\append " "
|
|
nomsu\append bit
|
|
else
|
|
arg_nomsu = recurse(bit,inline:true)
|
|
return nil unless arg_nomsu
|
|
unless i == 1
|
|
nomsu\append " "
|
|
if bit.type == "Action" or bit.type == "Block"
|
|
arg_nomsu\parenthesize!
|
|
nomsu\append arg_nomsu
|
|
return nomsu
|
|
else
|
|
nomsu = NomsuCode(tree.source)
|
|
next_space = ""
|
|
line_len, last_colon = 0, nil
|
|
for i,bit in ipairs tree
|
|
if type(bit) == "string"
|
|
line_len += #next_space + #bit
|
|
nomsu\append next_space, bit
|
|
next_space = " "
|
|
else
|
|
arg_nomsu = if last_colon == i-1 and bit.type == "Action" then nil
|
|
elseif bit.type == "Block" then nil
|
|
else recurse(bit,inline:true)
|
|
|
|
if arg_nomsu and line_len + #tostring(arg_nomsu) < MAX_LINE
|
|
if bit.type == "Action"
|
|
if can_use_colon and i > 1
|
|
nomsu\append match(next_space,"[^ ]*"), ": ", arg_nomsu
|
|
next_space = "\n.."
|
|
line_len = 2
|
|
last_colon = i
|
|
else
|
|
nomsu\append next_space, "(", arg_nomsu, ")"
|
|
line_len += #next_space + 2 + #tostring(arg_nomsu)
|
|
next_space = " "
|
|
else
|
|
nomsu\append next_space, arg_nomsu
|
|
line_len += #next_space + #tostring(arg_nomsu)
|
|
next_space = " "
|
|
else
|
|
arg_nomsu = recurse(bit, can_use_colon:true)
|
|
return nil unless arg_nomsu
|
|
-- These types carry their own indentation
|
|
if bit.type != "List" and bit.type != "Dict" and bit.type != "Text"
|
|
if i == 1
|
|
arg_nomsu = NomsuCode(bit.source, "(..)\n ", pop_comments(bit.source.start), arg_nomsu)
|
|
else
|
|
arg_nomsu = NomsuCode(bit.source, "\n ", pop_comments(bit.source.start), arg_nomsu)
|
|
|
|
if last_colon == i-1 and (bit.type == "Action" or bit.type == "Block")
|
|
next_space = ""
|
|
nomsu\append next_space, arg_nomsu
|
|
next_space = "\n.."
|
|
line_len = 2
|
|
|
|
if next_space == " " and #(match(tostring(nomsu),"[^\n]*$")) > MAX_LINE
|
|
next_space = "\n.."
|
|
return nomsu
|
|
|
|
when "EscapedNomsu"
|
|
nomsu = recurse(tree[1], inline:true)
|
|
if nomsu == nil and not inline
|
|
nomsu = recurse(tree[1])
|
|
return nomsu and NomsuCode tree.source, "\\:\n ", pop_comments(tree.source.start), nomsu
|
|
return nomsu and NomsuCode tree.source, "\\(", nomsu, ")"
|
|
|
|
when "Block"
|
|
if inline
|
|
nomsu = NomsuCode(tree.source)
|
|
for i,line in ipairs tree
|
|
if i > 1
|
|
nomsu\append "; "
|
|
line_nomsu = recurse(line,inline:true)
|
|
return nil unless line_nomsu
|
|
nomsu\append line_nomsu
|
|
return nomsu
|
|
nomsu = NomsuCode(tree.source)
|
|
for i, line in ipairs tree
|
|
nomsu\append pop_comments(line.source.start)
|
|
line = assert(recurse(line, can_use_colon:true), "Could not convert line to nomsu")
|
|
nomsu\append line
|
|
if i < #tree
|
|
nomsu\append "\n"
|
|
if match(tostring(line), "\n")
|
|
nomsu\append "\n"
|
|
return nomsu
|
|
|
|
when "Text"
|
|
if inline
|
|
nomsu = NomsuCode(tree.source, '"')
|
|
for bit in *tree
|
|
if type(bit) == 'string'
|
|
-- TODO: unescape better?
|
|
nomsu\append (gsub(gsub(gsub(bit,"\\","\\\\"),"\n","\\n"),'"','\\"'))
|
|
else
|
|
interp_nomsu = recurse(bit, inline:true)
|
|
if interp_nomsu
|
|
if bit.type != "Var" and bit.type != "List" and bit.type != "Dict" and bit.type != "Text"
|
|
interp_nomsu\parenthesize!
|
|
nomsu\append "\\", interp_nomsu
|
|
else return nil
|
|
nomsu\append '"'
|
|
return nomsu
|
|
else
|
|
inline_version = recurse(tree, inline:true)
|
|
if inline_version and #inline_version <= MAX_LINE
|
|
return inline_version
|
|
nomsu = NomsuCode(tree.source, '".."\n ')
|
|
for i, bit in ipairs tree
|
|
if type(bit) == 'string'
|
|
bit_lines = files.get_lines(bit)
|
|
for j, line in ipairs bit_lines
|
|
if j > 1 then nomsu\append "\n "
|
|
if #line > 1.25*MAX_LINE
|
|
remainder = line
|
|
while #remainder > 0
|
|
split = find(remainder, " ", MAX_LINE, true)
|
|
if split
|
|
chunk, remainder = sub(remainder, 1, split), sub(remainder, split+1, -1)
|
|
nomsu\append chunk
|
|
elseif #remainder > 1.75*MAX_LINE
|
|
split = math.floor(1.5*MAX_LINE)
|
|
chunk, remainder = sub(remainder, 1, split), sub(remainder, split+1, -1)
|
|
nomsu\append chunk
|
|
else
|
|
nomsu\append remainder
|
|
break
|
|
if #remainder > 0 then nomsu\append "\\\n .."
|
|
else
|
|
nomsu\append line
|
|
else
|
|
interp_nomsu = recurse(bit, inline:true)
|
|
if interp_nomsu
|
|
if bit.type != "Var" and bit.type != "List" and bit.type != "Dict" and bit.type != "Text"
|
|
interp_nomsu\parenthesize!
|
|
nomsu\append "\\", interp_nomsu
|
|
else
|
|
interp_nomsu = assert(recurse(bit))
|
|
return nil unless interp_nomsu
|
|
nomsu\append "\\\n ", interp_nomsu
|
|
if i < #tree
|
|
nomsu\append "\n .."
|
|
return nomsu
|
|
|
|
when "List"
|
|
if inline
|
|
nomsu = NomsuCode(tree.source, "[")
|
|
for i, item in ipairs tree
|
|
item_nomsu = recurse(item, inline:true)
|
|
return nil unless item_nomsu
|
|
if i > 1
|
|
nomsu\append ", "
|
|
nomsu\append item_nomsu
|
|
nomsu\append "]"
|
|
return nomsu
|
|
else
|
|
inline_version = recurse(tree, inline:true)
|
|
if inline_version and #inline_version <= MAX_LINE
|
|
return inline_version
|
|
nomsu = NomsuCode(tree.source, "[..]")
|
|
line = NomsuCode(tree.source, "\n ")
|
|
line_comments = if #tree > 0
|
|
pop_comments(tree[1].source.start)
|
|
else ''
|
|
for i, item in ipairs tree
|
|
item_nomsu = recurse(item, inline:true)
|
|
if item_nomsu and #tostring(line) + #", " + #item_nomsu <= MAX_LINE
|
|
if #line.bits > 1
|
|
line\append ", "
|
|
line\append item_nomsu
|
|
else
|
|
unless item_nomsu
|
|
item_nomsu = recurse(item)
|
|
return nil unless item_nomsu
|
|
if #line.bits > 1
|
|
if #tostring(line_comments) > 0
|
|
nomsu\append '\n ', line_comments
|
|
nomsu\append line
|
|
line = NomsuCode(line.source, "\n ")
|
|
line_comments = if i < #tree
|
|
pop_comments(tree[i+1].source.start)
|
|
else ''
|
|
line\append item_nomsu
|
|
if #line.bits > 1
|
|
nomsu\append line
|
|
return nomsu
|
|
|
|
when "Dict"
|
|
if inline
|
|
nomsu = NomsuCode(tree.source, "{")
|
|
for i, entry in ipairs tree
|
|
entry_nomsu = recurse(entry, inline:true)
|
|
return nil unless entry_nomsu
|
|
if i > 1
|
|
nomsu\append ", "
|
|
nomsu\append entry_nomsu
|
|
nomsu\append "}"
|
|
return nomsu
|
|
else
|
|
inline_version = recurse(tree, inline:true)
|
|
if inline_version then return inline_version
|
|
nomsu = NomsuCode(tree.source, "{..}")
|
|
line = NomsuCode(tree.source, "\n ")
|
|
line_comments = if #tree > 0
|
|
pop_comments(tree[1].source.start)
|
|
else ''
|
|
for i, entry in ipairs tree
|
|
entry_nomsu = recurse(entry)
|
|
return nil unless entry_nomsu
|
|
if #line + #tostring(entry_nomsu) <= MAX_LINE
|
|
if #line.bits > 1
|
|
line\append ", "
|
|
line\append entry_nomsu
|
|
else
|
|
if #line.bits > 1
|
|
if #tostring(line_comments) > 0
|
|
nomsu\append "\n ", line_comments
|
|
nomsu\append line
|
|
line = NomsuCode(line.source, "\n ")
|
|
line_comments = if i < #tree
|
|
pop_comments(tree[1].source.start)
|
|
else ''
|
|
line\append entry_nomsu
|
|
if #line.bits > 1
|
|
nomsu\append line
|
|
return nomsu
|
|
|
|
when "DictEntry"
|
|
key, value = tree[1], tree[2]
|
|
key_nomsu = recurse(key, inline:true)
|
|
return nil unless key_nomsu
|
|
if key.type == "Action" or key.type == "Block"
|
|
key_nomsu\parenthesize!
|
|
value_nomsu = if value
|
|
recurse(value, inline:true)
|
|
else NomsuCode(tree.source, "")
|
|
if inline and not value_nomsu then return nil
|
|
if not value_nomsu
|
|
return nil if inline
|
|
value_nomsu = recurse(value)
|
|
return nil unless value_nomsu
|
|
return NomsuCode tree.source, key_nomsu, ":", value_nomsu
|
|
|
|
when "IndexChain"
|
|
nomsu = NomsuCode(tree.source)
|
|
for i, bit in ipairs tree
|
|
if i > 1
|
|
nomsu\append "."
|
|
local bit_nomsu
|
|
if bit.type == "Text" and #bit == 1 and type(bit[1]) == 'string'
|
|
-- TODO: support arbitrary words here, including operators and unicode
|
|
if bit[1]\match("[_a-zA-Z][_a-zA-Z0-9]*")
|
|
bit_nomsu = bit[1]
|
|
unless bit_nomsu then bit_nomsu = recurse(bit, inline:true)
|
|
return nil unless bit_nomsu
|
|
switch bit.type
|
|
when "Action", "Block", "IndexChain"
|
|
bit_nomsu\parenthesize!
|
|
when "Number"
|
|
if i < #tree
|
|
bit_nomsu\parenthesize!
|
|
nomsu\append bit_nomsu
|
|
return nomsu
|
|
|
|
when "Number"
|
|
return NomsuCode(tree.source, tostring(tree[1]))
|
|
|
|
when "Var"
|
|
return NomsuCode(tree.source, "%", tree[1])
|
|
|
|
else
|
|
error("Unknown type: #{tree.type}")
|
|
|
|
return NomsuCompiler
|