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lexer.g
Package: antlr-2_7_0.zip [view]
Upload User: afrynkmhm
Upload Date: 2007-01-06
Package Size: 1262k
Code Size: 1k
Category:
Compiler program
Development Platform:
Others
- /*
- * Make sure to run antlr.Tool on the lexer.g file first!
- */
- options {
- mangleLiteralPrefix = "TK_";
- language="Cpp";
- }
- class TinyCLexer extends Lexer;
- options {
- k=2;
- exportVocab=TinyC;
- charVocabulary = '3'..'377';
- }
- tokens {
- "int"; "char"; "if"; "else"; "while";
- }
- WS_ : (' '
- | 't'
- | 'n' {newline();}
- | 'r')
- { _ttype = antlr::Token::SKIP; }
- ;
- SL_COMMENT :
- "//"
- (~'n')* 'n'
- { _ttype = antlr::Token::SKIP; newline(); }
- ;
- ML_COMMENT
- : "/*"
- ( { LA(2)!='/' }? '*'
- | 'n' { newline(); }
- | ~('*'|'n')
- )*
- "*/"
- { $setType(antlr::Token::SKIP); }
- ;
- LPAREN
- options {
- paraphrase="'('";
- }
- : '('
- ;
- RPAREN
- options {
- paraphrase="')'";
- }
- : ')'
- ;
- LCURLY: '{'
- ;
- RCURLY: '}'
- ;
- STAR: '*'
- ;
- PLUS: '+'
- ;
- ASSIGN
- : '='
- ;
- SEMI: ';'
- ;
- COMMA
- : ','
- ;
- CHAR_LITERAL
- : ''' (ESC|~''') '''
- ;
- STRING_LITERAL
- : '"' (ESC|~'"')* '"'
- ;
- protected
- ESC : '\'
- ( 'n'
- | 'r'
- | 't'
- | 'b'
- | 'f'
- | '"'
- | '''
- | '\'
- | '0'..'3'
- (
- options {
- warnWhenFollowAmbig = false;
- }
- : DIGIT
- (
- options {
- warnWhenFollowAmbig = false;
- }
- : DIGIT
- )?
- )?
- | '4'..'7'
- (
- options {
- warnWhenFollowAmbig = false;
- }
- : DIGIT
- )?
- )
- ;
- protected
- DIGIT
- : '0'..'9'
- ;
- INT : (DIGIT)+
- ;
- ID
- options {
- testLiterals = true;
- paraphrase = "an identifier";
- }
- : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'_'|'0'..'9')*
- ;