forked from jasder/antlr
30 lines
754 B
Plaintext
30 lines
754 B
Plaintext
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grammar E;
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prog: classDef+ ; // match one or more class definitions
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classDef
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: 'class' ID '{' member+ '}' // a class has one or more members
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{System.out.println("class "+$ID.text);}
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;
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member
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: 'int' ID ';' // field definition
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{System.out.println("var "+$ID.text);}
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| 'int' f=ID '(' ID ')' '{' stat '}' // method definition
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{System.out.println("method: "+$f.text);}
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;
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stat: expr ';'
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{System.out.println("found expr: "+$stat.text);}
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| ID '=' expr ';'
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{System.out.println("found assign: "+$stat.text);}
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;
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expr: INT
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| ID '(' INT ')'
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;
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ID : ('a'..'z'|'A'..'Z')+ ;
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INT : '0'..'9'+ ;
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WS : (' '|'\t'|'\n'|'\r')+ {$channel=HIDDEN;} ;
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