mirror of
https://github.com/leafo/moonscript.git
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123 lines
4.2 KiB
Lua
123 lines
4.2 KiB
Lua
-- Copyright 2006-2011 Mitchell mitchell<att>caladbolg.net. See LICENSE.
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-- Moonscript lexer by leaf corcoran <http://leafo.net>
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local l = lexer
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local token, word_match = l.token, l.word_match
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local P, S, R = l.lpeg.P, l.lpeg.S, l.lpeg.R
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module(...)
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-- Whitespace.
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local ws = token(l.WHITESPACE, l.space^1)
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local longstring = #('[[' + ('[' * P('=')^0 * '['))
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local longstring = longstring * P(function(input, index)
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local level = input:match('^%[(=*)%[', index)
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if level then
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local _, stop = input:find(']'..level..']', index, true)
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return stop and stop + 1 or #input + 1
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end
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end)
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-- Comments.
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local line_comment = '--' * l.nonnewline^0
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local block_comment = '--' * longstring
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local comment = token(l.COMMENT, block_comment + line_comment)
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-- Strings.
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local sq_str = l.delimited_range("'", '\\', true)
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local dq_str = l.delimited_range('"', '\\', true)
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local string = token(l.STRING, sq_str + dq_str + longstring)
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-- Numbers.
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local number = token(l.NUMBER, l.float + l.integer)
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-- Keywords.
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local keyword = token(l.KEYWORD, word_match {
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'return', 'break', 'for', 'while',
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'if', 'else', 'elseif', 'then', 'export',
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'import', 'from', 'with', 'in', 'and',
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'or', 'not', 'class', 'extends', 'super', 'do',
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'using', 'switch', 'when',
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})
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local special = token("special", word_match { "true", "false", "nil" })
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-- Functions.
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local builtin = token(l.FUNCTION, word_match({
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"_G","_VERSION","assert","collectgarbage","dofile","error","getfenv","getmetatable","ipairs","load",
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"loadfile","loadstring","module","next","pairs","pcall","print","rawequal","rawget","rawset","require",
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"select","setfenv","setmetatable","tonumber","tostring","type","unpack","xpcall",
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"coroutine.create","coroutine.resume","coroutine.running","coroutine.status","coroutine.wrap","coroutine.yield",
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"debug.debug","debug.getfenv","debug.gethook","debug.getinfo","debug.getlocal","debug.getmetatable",
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"debug.getregistry","debug.getupvalue","debug.setfenv","debug.sethook","debug.setlocal","debug.setmetatable",
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"debug.setupvalue","debug.traceback",
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"io.close","io.flush","io.input","io.lines","io.open","io.output","io.popen","io.read","io.stderr","io.stdin",
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"io.stdout","io.tmpfile","io.type","io.write",
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"math.abs","math.acos","math.asin","math.atan","math.atan2","math.ceil","math.cos","math.cosh","math.deg",
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"math.exp","math.floor","math.fmod","math.frexp","math.huge","math.ldexp","math.log","math.log10","math.max",
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"math.min","math.modf","math.pi","math.pow","math.rad","math.random","math.randomseed","math.sin","math.sinh",
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"math.sqrt","math.tan","math.tanh",
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"os.clock","os.date","os.difftime","os.execute","os.exit","os.getenv","os.remove","os.rename","os.setlocale",
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"os.time","os.tmpname",
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"package.cpath","package.loaded","package.loaders","package.loadlib","package.path","package.preload",
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"package.seeall",
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"string.byte","string.char","string.dump","string.find","string.format","string.gmatch","string.gsub",
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"string.len","string.lower","string.match","string.rep","string.reverse","string.sub","string.upper",
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"table.concat","table.insert","table.maxn","table.remove","table.sort"
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}, "%."))
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-- Identifiers.
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local identifier = token(l.IDENTIFIER, l.word)
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local fndef = token("fndef", P"->" + P"=>")
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local err = token(l.ERROR, word_match { "function", "end" })
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-- Operators.
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local symbol = token("symbol", S("(){}[]"))
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local operator = token(l.OPERATOR, '~=' + S('+-*!\\/%^#=<>;:,.'))
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-- self ref
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local self_var = token("self_ref", "@" * l.word + "self")
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local proper_ident = token("proper_ident", R("AZ") * l.word)
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local tbl_key = token("tbl_key", l.word * ":" + ":" * l.word )
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_rules = {
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{ 'whitespace', ws },
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{ 'error', err },
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{ 'self', self_var },
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{ 'special', special },
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{ 'keyword', keyword },
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{ 'builtin', builtin },
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{ 'identifier', proper_ident + tbl_key + identifier },
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{ 'comment', comment },
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{ 'number', number },
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{ 'string', string },
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{ 'fndef', fndef },
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{ 'symbol', symbol },
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{ 'operator', operator },
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{ 'any_char', l.any_char },
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}
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local style_special = { fore = l.colors.light_blue }
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local style_fndef = { fore = l.colors.green }
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_tokenstyles = {
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{ 'self_ref', style_special },
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{ 'proper_ident', l.style_class },
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{ 'fndef', style_fndef },
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{ 'symbol', style_fndef },
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{ 'special', style_special },
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{ 'tbl_key', { fore = l.colors.red } },
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}
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