pub const fn needs_drop<T: ?Sized>() -> bool🔬This is a nightly-only experimental API. (
core_intrinsics)Expand description
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 the return value of this function is unspecified.
Note that, unlike most intrinsics, this can only be called at compile-time
as backends do not have an implementation for it. The only caller (its
stable counterpart) wraps this intrinsic call in a const block so that
backends only see an evaluated constant.
The stabilized version of this intrinsic is mem::needs_drop.