use assoc types in binop traits

1 files changed, 12 insertions, 4 deletions

diff --git a/src/libstd/time/duration.rs b/src/libstd/time/duration.rs
index 51564b53976..1e148105cc6 100644
--- a/src/libstd/time/duration.rs
+++ b/src/libstd/time/duration.rs
@@ -273,7 +273,9 @@ impl Neg<Duration> for Duration {
     }
 }
 
-impl Add<Duration, Duration> for Duration {
+impl Add for Duration {
+    type Output = Duration;
+
     fn add(self, rhs: Duration) -> Duration {
         let mut secs = self.secs + rhs.secs;
         let mut nanos = self.nanos + rhs.nanos;
@@ -285,7 +287,9 @@ impl Add<Duration, Duration> for Duration {
     }
 }
 
-impl Sub<Duration, Duration> for Duration {
+impl Sub for Duration {
+    type Output = Duration;
+
     fn sub(self, rhs: Duration) -> Duration {
         let mut secs = self.secs - rhs.secs;
         let mut nanos = self.nanos - rhs.nanos;
@@ -297,7 +301,9 @@ impl Sub<Duration, Duration> for Duration {
     }
 }
 
-impl Mul<i32, Duration> for Duration {
+impl Mul<i32> for Duration {
+    type Output = Duration;
+
     fn mul(self, rhs: i32) -> Duration {
         // Multiply nanoseconds as i64, because it cannot overflow that way.
         let total_nanos = self.nanos as i64 * rhs as i64;
@@ -307,7 +313,9 @@ impl Mul<i32, Duration> for Duration {
     }
 }
 
-impl Div<i32, Duration> for Duration {
+impl Div<i32> for Duration {
+    type Output = Duration;
+
     fn div(self, rhs: i32) -> Duration {
         let mut secs = self.secs / rhs as i64;
         let carry = self.secs - secs * rhs as i64;