23 lines
433 B
ANTLR
23 lines
433 B
ANTLR
grammar ifcc;
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axiom: prog EOF ;
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prog: 'int' 'main' '(' ')' '{' stmt* '}' ;
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stmt: decl_stmt | set_stmt | return_stmt ;
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return_stmt: RETURN val ';' ;
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decl_stmt: 'int' (VAR_NAME ',')* VAR_NAME ';' ;
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set_stmt: VAR_NAME '=' val ';' ;
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val: CONST | VAR_NAME ;
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RETURN : 'return' ;
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CONST : [0-9]+ ;
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VAR_NAME : [0-9a-zA-Z_]+ ;
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COMMENT : '/*' .*? '*/' -> skip ;
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DIRECTIVE : '#' .*? '\n' -> skip ;
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WS : [ \t\r\n] -> channel(HIDDEN) ;
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