toml.lua (1424B)
- -- Copyright 2015-2024 Alejandro Baez (https://keybase.io/baez). See LICENSE.
- -- TOML LPeg lexer.
- local lexer = lexer
- local P, S = lpeg.P, lpeg.S
- local lex = lexer.new(..., {fold_by_indentation = true})
- -- Keywords.
- lex:add_rule('keyword', lex:tag(lexer.KEYWORD, lexer.word_match('true false')))
- -- Identifiers.
- lex:add_rule('identifier', lex:tag(lexer.IDENTIFIER, lexer.word))
- -- Strings.
- local sq_str = lexer.range("'")
- local dq_str = lexer.range('"')
- lex:add_rule('string', lex:tag(lexer.STRING, sq_str + dq_str))
- -- Comments.
- lex:add_rule('comment', lex:tag(lexer.COMMENT, lexer.to_eol('#')))
- -- Operators.
- lex:add_rule('operator', lex:tag(lexer.OPERATOR, S('=+-,.{}[]()')))
- -- Datetime.
- local year = lexer.digit * lexer.digit * lexer.digit * lexer.digit
- local month = lexer.digit * lexer.digit^-1
- local day = lexer.digit * lexer.digit^-1
- local date = year * '-' * month * '-' * day
- local hours = lexer.digit * lexer.digit^-1
- local minutes = lexer.digit * lexer.digit
- local seconds = lexer.digit * lexer.digit
- local fraction = '.' * lexer.digit^0
- local time = hours * ':' * minutes * ':' * seconds * fraction^-1
- local zone = 'Z' + S(' \t')^0 * S('-+') * hours * (':' * minutes)^-1
- lex:add_rule('datetime', lex:tag(lexer.NUMBER .. '.timestamp', date * (S('tT \t') * time * zone^-1)))
- -- Numbers.
- lex:add_rule('number', lex:tag(lexer.NUMBER, lexer.number))
- lexer.property['scintillua.comment'] = '#'
- return lex