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|
/*
* Make sure to run antlr.Tool on the lexer.g file first!
*/
options {
mangleLiteralPrefix = "TK_";
}
class TinyCLexer extends Lexer;
options {
k=2;
exportVocab=TinyC;
charVocabulary = '\3'..'\377';
}
tokens {
"int"; "char"; "if"; "else"; "while";
}
WS : (' '
| '\t'
| '\n' {newline();}
| '\r')
{ _ttype = Token.SKIP; }
;
SL_COMMENT :
"//"
(~'\n')* '\n'
{ _ttype = Token.SKIP; newline(); }
;
ML_COMMENT
: "/*"
( { LA(2)!='/' }? '*'
| '\n' { newline(); }
| ~('*'|'\n')
)*
"*/"
{ $setType(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')*
;
|
