97 lines
2.3 KiB
ANTLR
97 lines
2.3 KiB
ANTLR
grammar xlang;
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file : function+ EOF;
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function : Identifier LeftParen parameterList? RightParen Colon type block;
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parameterList : parameter (Comma parameter)*;
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parameter : Identifier Colon type;
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type : TypeInteger
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| TypeBoolean
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;
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block : LeftBrace statement* RightBrace;
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statement : If expr block (Else block)?
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| While expr block
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| For expr Semicolon expr Semicolon expr block
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| Break Integer? Semicolon
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| Continue Integer? Semicolon
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| Return expr Semicolon
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| Print expr Semicolon
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| expr Semicolon
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;
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expr : Identifier assignmentOp expr
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| booleanExpr
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;
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assignmentOp : Define | Assign | Increment | Decrement;
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booleanExpr : comparisonExpr (booleanOp comparisonExpr)*;
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booleanOp : And | Or | Xor;
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comparisonExpr : Not comparisonExpr
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| True
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| False
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| additiveExpr (comparisonOp additiveExpr)?
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;
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comparisonOp : Less | LessEqual | Greater | GreaterEqual | Equal | NotEqual;
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additiveExpr : multiplicativeExpr (additiveOp multiplicativeExpr)*;
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additiveOp : Plus | Minus | BitAnd | BitOr | BitXor | ShiftLeft | ShiftRight;
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multiplicativeExpr : factor (multiplicativeOp factor)*;
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multiplicativeOp : Mul | Div | Rem;
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factor : Minus factor
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| BitNot factor
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| Integer
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| Identifier
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| Identifier LeftParen argumentList? RightParen
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| LeftParen expr RightParen
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;
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argumentList : expr (Comma expr)*;
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TypeInteger : 'Int';
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TypeBoolean : 'Bool';
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If : 'if';
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Else : 'else';
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While : 'while';
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For : 'for';
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Break : 'break';
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Continue : 'continue';
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Return : 'return';
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Print : 'print';
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And : 'and';
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Or : 'or';
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Xor : 'xor';
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Not : 'not';
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True : 'true';
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False : 'false';
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LeftParen : '(';
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RightParen : ')';
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Colon : ':';
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LeftBrace : '{';
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RightBrace : '}';
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Define : ':=';
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Assign : '=';
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Less : '<';
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LessEqual : '<=';
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Greater : '>';
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GreaterEqual : '>=';
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Equal : '==';
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NotEqual : '!=';
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Plus : '+';
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Minus : '-';
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BitAnd : '&';
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BitOr : '|';
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BitXor : '^';
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ShiftLeft : '<<';
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ShiftRight : '>>';
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BitNot : '~';
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Mul : '*';
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Div : '/';
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Rem : '%';
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Increment : '=+';
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Decrement : '=-';
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Comma : ',';
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Semicolon : ';';
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Identifier : [a-z][_a-zA-Z0-9]*;
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Integer : [0-9]+;
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Comment : '//' ~[\n]* '\n' -> skip;
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Whitespace : [ \t\r\n]+ -> skip;
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Unknown : .;
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