diff options
| -rw-r--r-- | src/libstd/env.rs | 2 | ||||
| -rw-r--r-- | src/libstd/lib.rs | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/src/libstd/env.rs b/src/libstd/env.rs index baa2b5d2846..ee6a907f616 100644 --- a/src/libstd/env.rs +++ b/src/libstd/env.rs @@ -630,6 +630,7 @@ impl Iterator for Args { #[stable(feature = "env", since = "1.0.0")] impl ExactSizeIterator for Args { fn len(&self) -> usize { self.inner.len() } + fn is_empty(&self) -> bool { self.inner.is_empty() } } #[stable(feature = "env_iterators", since = "1.11.0")] @@ -649,6 +650,7 @@ impl Iterator for ArgsOs { #[stable(feature = "env", since = "1.0.0")] impl ExactSizeIterator for ArgsOs { fn len(&self) -> usize { self.inner.len() } + fn is_empty(&self) -> bool { self.inner.is_empty() } } #[stable(feature = "env_iterators", since = "1.11.0")] diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs index 8132b139260..1f40d3fd1d3 100644 --- a/src/libstd/lib.rs +++ b/src/libstd/lib.rs @@ -250,6 +250,7 @@ #![feature(core_float)] #![feature(core_intrinsics)] #![feature(dropck_parametricity)] +#![feature(exact_size_is_empty)] #![feature(float_extras)] #![feature(float_from_str_radix)] #![feature(fn_traits)] |