| CompilationUnit | ::= | ( Statement )* <EOF> |
| Expression | ::= | AdditiveExpression |
| AdditiveExpression | ::= | MultiplicativeExpression ( "+" MultiplicativeExpression | "-" MultiplicativeExpression )* |
| MultiplicativeExpression | ::= | UnaryExpression ( "*" UnaryExpression | "/" UnaryExpression | "%" UnaryExpression )* |
| UnaryExpression | ::= | "~" UnaryExpression |
| | | PrimaryExpression | |
| PrimaryExpression | ::= | <INTEGER_LITERAL> |
| | | "(" Expression ")" | |
| Statement | ::= | ";" |
| | | StatementExpression | |
| | | IOStatement | |
| StatementExpression | ::= | Expression ";" |
| IOStatement | ::= | WriteStatement |
| WriteStatement | ::= | "write" Expression |