diff options
Diffstat (limited to 'compiler/rustc_serialize/src')
| -rw-r--r-- | compiler/rustc_serialize/src/serialize.rs | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/compiler/rustc_serialize/src/serialize.rs b/compiler/rustc_serialize/src/serialize.rs index 4996e02d7d7..e755991e903 100644 --- a/compiler/rustc_serialize/src/serialize.rs +++ b/compiler/rustc_serialize/src/serialize.rs @@ -591,9 +591,8 @@ macro_rules! tuple { #[allow(non_snake_case)] fn encode(&self, s: &mut S) -> Result<(), S::Error> { let ($(ref $name,)+) = *self; - let mut n = 0; - $(let $name = $name; n += 1;)+ - s.emit_tuple(n, |s| { + let len: usize = count!($($name)+); + s.emit_tuple(len, |s| { let mut i = 0; $(s.emit_tuple_arg({ i+=1; i-1 }, |s| $name.encode(s))?;)+ Ok(()) |