Impls inside of macros doesn't work

[auroranockert]

For example, this doesn't work.

macro_rules! Q(($T:ty, $f:expr, $name:ident) => {
  struct $name {
    value: $T
  }

  impl $name {
    pure fn add(&self, other: &$name) -> $name {
      $name { value: self.value + other.value }
    }
  }
})

Q!(i8, 8, Q8)

fn main() {
  let a = Q8 { value: 4 };
  let b = Q8 { value: 8 };

  io::println(fmt!("Q8: %?", &a.add(&b)))
}

and gives the error,

error: type `Q8` does not implement any method in scope named `add`
io::println(fmt!("Q8: %?", &a.add(&b)))

the intended effect is something like,

Q8: {value: 12}

should be printed to stdout.

[catamorphism]

Seems non-critical for 0.7. Nominating for milestone 1 (well-defined).

[graydon]

dupe of #4375