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| 1 | +grammar Crit; |
| 2 | + |
| 3 | + |
| 4 | +program: line* EOF; |
| 5 | + |
| 6 | +line: statement | ifBlock | whileBlock; |
| 7 | + |
| 8 | +statement: (assignment|functionCall) ';'; |
| 9 | + |
| 10 | +ifBlock: 'if' expression block ('else' elseIfBlock); |
| 11 | + |
| 12 | +elseIfBlock: block | ifBlock; |
| 13 | + |
| 14 | +whileBlock: WHILE expression block ('else' elseIfBlock); |
| 15 | + |
| 16 | +WHILE: 'while' | 'until'; |
| 17 | + |
| 18 | +assignment: IDENTIFIER '=' expression; |
| 19 | + |
| 20 | +functionCall: IDENTIFIER '(' (expression (',' expression)*)? ')'; |
| 21 | + |
| 22 | +expression |
| 23 | + : constant #constantExpression |
| 24 | + | IDENTIFIER #identifierExpression |
| 25 | + | functionCall #functionCallExpression |
| 26 | + | '(' expression ')' #parenthesizedExpression |
| 27 | + | '!' expression #notExpression |
| 28 | + | expression multOp expression #multiplicativeExpression |
| 29 | + | expression addOp expression #additiveExpression |
| 30 | + | expression compareOp expression #comparisonExpression |
| 31 | + | expression boolOp expression #booleanExpression |
| 32 | + ; |
| 33 | + |
| 34 | + |
| 35 | + |
| 36 | +multOp: '*' | '/' | '%'; |
| 37 | +addOp: '+' | '-'; |
| 38 | +compareOp: '==' | '!=' | '<' | '>' | '<=' | '>='; |
| 39 | +boolOp: BOOL_OPERATOR; |
| 40 | + |
| 41 | +BOOL_OPERATOR: 'and' | 'or' | 'xor'; |
| 42 | + |
| 43 | +constant: INTEGER | FLOAT | STRING | BOOL | NULL; |
| 44 | + |
| 45 | +INTEGER: [0-9]+; |
| 46 | +FLOAT: [0-9]+ '.' [0-9]+; |
| 47 | +STRING: ('"' ~'"'* '"') | ('\'' ~'\''* '\''); |
| 48 | +BOOL: 'true' | 'false'; |
| 49 | +NULL: 'null'; |
| 50 | + |
| 51 | + |
| 52 | +block: '{' line* '}'; |
| 53 | + |
| 54 | +WS: [ \t\r\n]+ -> skip; |
| 55 | +IDENTIFIER: [a-zA-Z_][a-zA-Z0-9_]*; |
| 56 | + |
| 57 | +Comment |
| 58 | + : '#' ~( '\r' | '\n' )* |
| 59 | + ; |
| 60 | + |
| 61 | + |
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