diff options
Diffstat (limited to 'src/libcore')
| -rw-r--r-- | src/libcore/intrinsics.rs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/libcore/intrinsics.rs b/src/libcore/intrinsics.rs index e7af0be88a0..1ca243134cc 100644 --- a/src/libcore/intrinsics.rs +++ b/src/libcore/intrinsics.rs @@ -241,7 +241,12 @@ extern "rust-intrinsic" { /// will trigger a compiler error. pub fn return_address() -> *const u8; - /// Returns `true` if a type requires drop glue. + /// Returns `true` if the actual type given as `T` requires drop + /// glue; returns `false` if the actual type provided for `T` + /// implements `Copy`. + /// + /// If the actual type neither requires drop glue nor implements + /// `Copy`, then may return `true` or `false`. pub fn needs_drop<T>() -> bool; /// Returns `true` if a type is managed (will be allocated on the local heap) |