Add checked_add method to Instant time type

1 files changed, 2 insertions, 6 deletions

diff --git a/src/libstd/sys/wasm/time.rs b/src/libstd/sys/wasm/time.rs
index 991e8176edf..20cd870919c 100644
--- a/src/libstd/sys/wasm/time.rs
+++ b/src/libstd/sys/wasm/time.rs
@@ -28,8 +28,8 @@ impl Instant {
         self.0 - other.0
     }
 
-    pub fn add_duration(&self, other: &Duration) -> Instant {
-        Instant(self.0 + *other)
+    pub fn checked_add_duration(&self, other: &Duration) -> Option<Instant> {
+        self.0.checked_add(*other).map(|d| Instant(d))
     }
 
     pub fn sub_duration(&self, other: &Duration) -> Instant {
@@ -47,10 +47,6 @@ impl SystemTime {
         self.0.checked_sub(other.0).ok_or_else(|| other.0 - self.0)
     }
 
-    pub fn add_duration(&self, other: &Duration) -> SystemTime {
-        SystemTime(self.0 + *other)
-    }
-
     pub fn checked_add_duration(&self, other: &Duration) -> Option<SystemTime> {
         self.0.checked_add(*other).map(|d| SystemTime(d))
     }