diff options
| -rw-r--r-- | src/libcore/iter/adapters/chain.rs | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/src/libcore/iter/adapters/chain.rs b/src/libcore/iter/adapters/chain.rs index 0100e62fae6..aadecdfbb65 100644 --- a/src/libcore/iter/adapters/chain.rs +++ b/src/libcore/iter/adapters/chain.rs @@ -130,17 +130,16 @@ where #[inline] fn last(self) -> Option<A::Item> { - match self { - Chain { a: Some(a), b: Some(b) } => { - // Must exhaust a before b. - let a_last = a.last(); - let b_last = b.last(); - b_last.or(a_last) - } - Chain { a: Some(a), b: None } => a.last(), - Chain { a: None, b: Some(b) } => b.last(), - Chain { a: None, b: None } => None, - } + // Must exhaust a before b. + let a_last = match self.a { + Some(a) => a.last(), + None => None, + }; + let b_last = match self.b { + Some(b) => b.last(), + None => None, + }; + b_last.or(a_last) } #[inline] |