Function std::intrinsics::needs_drop
pub const extern "rust-intrinsic" fn needs_drop<T>() -> bool
core_intrinsics)intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library
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 is safe to call; it does not require an unsafe block. Therefore, implementations must not require the user to uphold any safety invariants.
The stabilized version of this intrinsic is mem::needs_drop.
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/intrinsics/fn.needs_drop.html