objective_c.lua (2510B)
- -- Copyright 2006-2024 Mitchell. See LICENSE.
- -- Objective C LPeg lexer.
- local lexer = require('lexer')
- local token, word_match = lexer.token, lexer.word_match
- local P, S = lpeg.P, lpeg.S
- local lex = lexer.new('objective_c')
- -- Whitespace.
- lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
- -- Keywords.
- lex:add_rule('keyword', token(lexer.KEYWORD, word_match{
- -- From C.
- 'asm', 'auto', 'break', 'case', 'const', 'continue', 'default', 'do', 'else', 'extern', 'false',
- 'for', 'goto', 'if', 'inline', 'register', 'return', 'sizeof', 'static', 'switch', 'true',
- 'typedef', 'void', 'volatile', 'while', 'restrict', '_Bool', '_Complex', '_Pragma', '_Imaginary',
- -- Objective C.
- 'oneway', 'in', 'out', 'inout', 'bycopy', 'byref', 'self', 'super',
- -- Preprocessor directives.
- '@interface', '@implementation', '@protocol', '@end', '@private', '@protected', '@public',
- '@class', '@selector', '@encode', '@defs', '@synchronized', '@try', '@throw', '@catch',
- '@finally',
- -- Constants.
- 'TRUE', 'FALSE', 'YES', 'NO', 'NULL', 'nil', 'Nil', 'METHOD_NULL'
- }))
- -- Types.
- lex:add_rule('type', token(lexer.TYPE, word_match(
- 'apply_t id Class MetaClass Object Protocol retval_t SEL STR IMP BOOL TypedStream')))
- -- Strings.
- local sq_str = P('L')^-1 * lexer.range("'", true)
- local dq_str = P('L')^-1 * lexer.range('"', true)
- lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
- -- Identifiers.
- lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
- -- Comments.
- local line_comment = lexer.to_eol('//', true)
- local block_comment = lexer.range('/*', '*/')
- lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
- -- Numbers.
- lex:add_rule('number', token(lexer.NUMBER, lexer.number))
- -- Preprocessor.
- lex:add_rule('preprocessor',
- #lexer.starts_line('#') * token(lexer.PREPROCESSOR, '#' * S('\t ')^0 * word_match{
- 'define', 'elif', 'else', 'endif', 'error', 'if', 'ifdef', 'ifndef', 'import', 'include',
- 'line', 'pragma', 'undef', 'warning'
- }))
- -- Operators.
- lex:add_rule('operator', token(lexer.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}')))
- -- Fold symbols.
- lex:add_fold_point(lexer.PREPROCESSOR, 'region', 'endregion')
- lex:add_fold_point(lexer.PREPROCESSOR, 'if', 'endif')
- lex:add_fold_point(lexer.PREPROCESSOR, 'ifdef', 'endif')
- lex:add_fold_point(lexer.PREPROCESSOR, 'ifndef', 'endif')
- lex:add_fold_point(lexer.OPERATOR, '{', '}')
- lex:add_fold_point(lexer.COMMENT, '/*', '*/')
- lexer.property['scintillua.comment'] = '//'
- return lex