macro_rules with parentheses

[UtherII]

-- ❤️ --
macro_rules used with parenthesizes at the top level are prettified with braces, but the semicolon at the end is kept unchanged. The problem is the semicolon is required behind macro_rules with parenthesizes, but it causes an error behind braces.

macro_rules! x (
      () => {}  
);

is prettified to

macro_rules! x {
      () => {}  
};

I guess you should either keep parenthesizes or remove the final semicolon when switching to braces (but I'm not sure they won't be other side effect).

[dtolnay]

Fixed in 0.2.6.