1 files changed, 144 insertions, 0 deletions
diff --git a/lua/lexers/lua.lua b/lua/lexers/lua.lua
new file mode 100644
index 0000000..ff749ec
--- /dev/null
+++ b/lua/lexers/lua.lua
@@ -0,0 +1,144 @@
+-- Copyright 2006-2024 Mitchell. See LICENSE.
+-- Lua LPeg lexer.
+-- Original written by Peter Odding, 2007/04/04.
+
+local lexer = lexer
+local B, P, S = lpeg.B, lpeg.P, lpeg.S
+
+local lex = lexer.new(...)
+
+-- Keywords.
+lex:add_rule('keyword', lex:tag(lexer.KEYWORD, lex:word_match(lexer.KEYWORD)))
+
+-- Functions.
+local non_field = -B('.') + B('_G.') + B('..')
+local builtin_func = lex:word_match(lexer.FUNCTION_BUILTIN)
+local lib_func = lex:word_match(lexer.FUNCTION_BUILTIN .. '.library')
+local func = lex:tag(lexer.FUNCTION, lexer.word)
+local method = B(':') * lex:tag(lexer.FUNCTION_METHOD, lexer.word)
+lex:add_rule('function',
+  method + ((non_field * lex:tag(lexer.FUNCTION_BUILTIN, builtin_func + lib_func)) + func) *
+    #(lexer.space^0 * S('({\'"')))
+
+-- Constants.
+local builtin_const = lex:word_match(lexer.CONSTANT_BUILTIN)
+local lib_const = lex:word_match(lexer.CONSTANT_BUILTIN .. '.library')
+lex:add_rule('constant', non_field * lex:tag(lexer.CONSTANT_BUILTIN, builtin_const + lib_const))
+
+-- Identifiers.
+lex:add_rule('identifier', lex:tag(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+local sq_str = lexer.range("'")
+local dq_str = lexer.range('"')
+local longstring = lpeg.Cmt('[' * lpeg.C(P('=')^0) * '[', function(input, index, eq)
+  local _, e = input:find(']' .. eq .. ']', index, true)
+  return (e or #input) + 1
+end)
+lex:add_rule('string', lex:tag(lexer.STRING, sq_str + dq_str) +
+  lex:tag(lexer.STRING .. '.longstring', longstring))
+
+-- Comments.
+local line_comment = lexer.to_eol('--')
+local block_comment = '--' * longstring
+lex:add_rule('comment', lex:tag(lexer.COMMENT, block_comment + line_comment))
+
+-- Numbers.
+local lua_integer = P('-')^-1 * (lexer.hex_num + lexer.dec_num)
+lex:add_rule('number', lex:tag(lexer.NUMBER, lexer.float + lua_integer))
+
+-- Labels.
+lex:add_rule('label', lex:tag(lexer.LABEL, '::' * lexer.word * '::'))
+
+-- Attributes.
+lex:add_rule('attribute', lex:tag(lexer.ATTRIBUTE, '<' * lexer.space^0 *
+  lexer.word_match('const close') * lexer.space^0 * '>'))
+
+-- Operators.
+lex:add_rule('operator', lex:tag(lexer.OPERATOR, '..' + S('+-*/%^#=<>&|~;:,.{}[]()')))
+
+-- Fold points.
+local function fold_longcomment(text, pos, line, s, symbol)
+  if symbol == '[' then
+    if line:find('^%[=*%[', s) then return 1 end
+  elseif symbol == ']' then
+    if line:find('^%]=*%]', s) then return -1 end
+  end
+  return 0
+end
+lex:add_fold_point(lexer.KEYWORD, 'if', 'end')
+lex:add_fold_point(lexer.KEYWORD, 'do', 'end')
+lex:add_fold_point(lexer.KEYWORD, 'function', 'end')
+lex:add_fold_point(lexer.KEYWORD, 'repeat', 'until')
+lex:add_fold_point(lexer.COMMENT, '[', fold_longcomment)
+lex:add_fold_point(lexer.COMMENT, ']', fold_longcomment)
+lex:add_fold_point(lexer.FUNCTION .. '.longstring', '[', ']')
+lex:add_fold_point(lexer.OPERATOR, '(', ')')
+lex:add_fold_point(lexer.OPERATOR, '[', ']')
+lex:add_fold_point(lexer.OPERATOR, '{', '}')
+
+-- Word lists.
+lex:set_word_list(lexer.KEYWORD, {
+  'and', 'break', 'do', 'else', 'elseif', 'end', 'false', 'for', 'function', 'if', 'in', 'local',
+  'or', 'nil', 'not', 'repeat', 'return', 'then', 'true', 'until', 'while', --
+  'goto' -- 5.2
+})
+
+lex:set_word_list(lexer.FUNCTION_BUILTIN, {
+  'assert', 'collectgarbage', 'dofile', 'error', 'getmetatable', 'ipairs', 'load', 'loadfile',
+  'next', 'pairs', 'pcall', 'print', 'rawequal', 'rawget', 'rawset', 'require', 'select',
+  'setmetatable', 'tonumber', 'tostring', 'type', 'xpcall', --
+  'rawlen', -- 5.2
+  'warn' -- 5.4
+})
+
+lex:set_word_list(lexer.FUNCTION_BUILTIN .. '.library', {
+  'coroutine.create', 'coroutine.resume', 'coroutine.running', 'coroutine.status', 'coroutine.wrap',
+  'coroutine.yield', --
+  'coroutine.isyieldable', -- 5.3
+  'coroutine.close', -- 5.4
+  'package.loadlib', --
+  'package.searchpath', -- 5.2
+  'utf8.char', 'utf8.codepoint', 'utf8.codes', 'utf8.len', 'utf8.offset', -- 5.3
+  'string.byte', 'string.char', 'string.dump', 'string.find', 'string.format', 'string.gmatch',
+  'string.gsub', 'string.len', 'string.lower', 'string.match', 'string.rep', 'string.reverse',
+  'string.sub', 'string.upper', --
+  'string.pack', 'string.packsize', 'string.unpack', -- 5.3
+  'table.concat', 'table.insert', 'table.remove', 'table.sort', --
+  'table.pack', 'table.unpack', -- 5.2
+  'table.move', -- 5.3
+  'math.abs', 'math.acos', 'math.asin', 'math.atan', 'math.ceil', 'math.cos', 'math.deg',
+  'math.exp', 'math.floor', 'math.fmod', 'math.log', 'math.max', 'math.min', 'math.modf',
+  'math.rad', 'math.random', 'math.randomseed', 'math.sin', 'math.sqrt', 'math.tan', --
+  'math.tointeger', 'math.type', 'math.ult', -- 5.3
+  'io.close', 'io.flush', 'io.input', 'io.lines', 'io.open', 'io.output', 'io.popen', 'io.read',
+  'io.tmpfile', 'io.type', 'io.write', --
+  'os.clock', 'os.date', 'os.difftime', 'os.execute', 'os.exit', 'os.getenv', 'os.remove',
+  'os.rename', 'os.setlocale', 'os.time', 'os.tmpname', --
+  'debug', 'debug.debug', 'debug.gethook', 'debug.getinfo', 'debug.getlocal', 'debug.getmetatable',
+  'debug.getregistry', 'debug.getupvalue', 'debug.sethook', 'debug.setlocal', 'debug.setmetatable',
+  'debug.setupvalue', 'debug.traceback', --
+  'debug.getuservalue', 'debug.setuservalue', 'debug.upvalueid', 'debug.upvaluejoin' -- 5.2
+})
+
+lex:set_word_list(lexer.CONSTANT_BUILTIN, {
+  '_G', '_VERSION', --
+  '_ENV' -- 5.2
+})
+
+lex:set_word_list(lexer.CONSTANT_BUILTIN .. '.library', {
+  'coroutine', --
+  'package', 'package.cpath', 'package.loaded', 'package.path', 'package.preload', --
+  'package.config', 'package.searchers', -- 5.2
+  'utf8', 'utf8.charpattern', -- 5.3
+  'string', --
+  'table', --
+  'math', 'math.huge', 'math.pi', --
+  'math.maxinteger', 'math.mininteger', -- 5.3
+  'io', 'io.stderr', 'io.stdin', 'io.stdout', --
+  'os'
+})
+
+lexer.property['scintillua.comment'] = '--'
+
+return lex