pike.lua (1748B)
- -- Copyright 2006-2024 Mitchell. See LICENSE.
- -- Pike 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('pike')
- -- Whitespace.
- lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
- -- Keywords.
- lex:add_rule('keyword', token(lexer.KEYWORD, word_match{
- 'break', 'case', 'catch', 'continue', 'default', 'do', 'else', 'for', 'foreach', 'gauge', 'if',
- 'lambda', 'return', 'sscanf', 'switch', 'while', 'import', 'inherit',
- -- Type modifiers.
- 'constant', 'extern', 'final', 'inline', 'local', 'nomask', 'optional', 'private', 'protected',
- 'public', 'static', 'variant'
- }))
- -- Types.
- lex:add_rule('type', token(lexer.TYPE, word_match(
- 'array class float function int mapping mixed multiset object program string void')))
- -- Identifiers.
- lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
- -- Strings.
- local sq_str = lexer.range("'", true)
- local dq_str = P('#')^-1 * lexer.range('"', true)
- lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
- -- Comments.
- local line_comment = lexer.to_eol('//', true)
- local block_comment = lexer.range('/*', '*/', false, false, true)
- lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
- -- Numbers.
- lex:add_rule('number', token(lexer.NUMBER, lexer.number * S('lLdDfF')^-1))
- -- Preprocessors.
- lex:add_rule('preprocessor', token(lexer.PREPROCESSOR, lexer.to_eol(lexer.starts_line('#'))))
- -- Operators.
- lex:add_rule('operator', token(lexer.OPERATOR, S('<>=!+-/*%&|^~@`.,:;()[]{}')))
- -- Fold points.
- lex:add_fold_point(lexer.OPERATOR, '{', '}')
- lex:add_fold_point(lexer.COMMENT, '/*', '*/')
- lexer.property['scintillua.comment'] = '//'
- return lex