smalltalk.lua (1246B)
- -- Copyright 2006-2024 Mitchell. See LICENSE.
- -- Smalltalk 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('smalltalk')
- -- Whitespace.
- lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
- -- Keywords.
- lex:add_rule('keyword', token(lexer.KEYWORD, word_match(
- 'true false nil self super isNil not Smalltalk Transcript')))
- -- Types.
- lex:add_rule('type', token(lexer.TYPE, word_match(
- 'Date Time Boolean True False Character String Array Symbol Integer Object')))
- -- Identifiers.
- lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
- -- Strings.
- local sq_str = lexer.range("'")
- local word_str = '$' * lexer.word
- lex:add_rule('string', token(lexer.STRING, sq_str + word_str))
- -- Comments.
- lex:add_rule('comment', token(lexer.COMMENT, lexer.range('"', false, false)))
- -- Numbers.
- lex:add_rule('number', token(lexer.NUMBER, lexer.number))
- -- Operators.
- lex:add_rule('operator', token(lexer.OPERATOR, S(':=_<>+-/*!()[]')))
- -- Labels.
- lex:add_rule('label', token(lexer.LABEL, '#' * lexer.word))
- -- Fold points.
- lex:add_fold_point(lexer.OPERATOR, '[', ']')
- lexer.property['scintillua.comment'] = '"|"'
- return lex