before
Statements := ( ( BlockStatement | ExpressionStatement ";" | ";" ) )*
ExpressionStatement := Expression ( ( "@if" Expression | "@while" Expression ) )?
| "assert" PrimitiveExpression ( PrimitiveExpression )?
| "break" ( <ID> )?
| "continue" ( <ID> )?
| "return" ( Expression )?
| "throw" Expression
after
Statements := ( BlockStatement
| ExpressionStatement ( "@if" Expression
| "@while" Expression
| "@for" <ID> "in" Expression (".." Expression)? )? ";"
| ";"
)*
ExpressionStatement := Expression
| "assert" PrimitiveExpression ( PrimitiveExpression )?
| "break" ( <ID> )?
| "continue" ( <ID> )?
| "return" ( Expression )?
| "throw" Expression