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Module std::mem

Basic functions for dealing with memory.

This module contains functions for querying the size and alignment of types, initializing and manipulating memory.

Structs

Discriminant	Opaque type representing the discriminant of an enum.
ManuallyDrop	A wrapper to inhibit compiler from automatically calling `T`’s destructor. This wrapper is 0-cost.

Functions

align_of	Returns the ABI-required minimum alignment of a type.
align_of_val	Returns the ABI-required minimum alignment of the type of the value that `val` points to.
discriminant	Returns a value uniquely identifying the enum variant in `v`.
drop	Disposes of a value.
forget	Takes ownership and "forgets" about the value without running its destructor.
min_align_of	Deprecated Returns the ABI-required minimum alignment of a type.
min_align_of_val	Deprecated Returns the ABI-required minimum alignment of the type of the value that `val` points to.
needs_drop	Returns `true` if dropping values of type `T` matters.
replace	Moves `src` into the referenced `dest`, returning the previous `dest` value.
size_of	Returns the size of a type in bytes.
size_of_val	Returns the size of the pointed-to value in bytes.
swap	Swaps the values at two mutable locations, without deinitializing either one.
take	Replaces `dest` with the default value of `T`, returning the previous `dest` value.
transmute ^⚠	Reinterprets the bits of a value of one type as another type.
transmute_copy ^⚠	Interprets `src` as having type `&U`, and then reads `src` without moving the contained value.
uninitialized ^⚠	Deprecated Bypasses Rust's normal memory-initialization checks by pretending to produce a value of type `T`, while doing nothing at all.
zeroed ^⚠	Returns the value of type `T` represented by the all-zero byte-pattern.
align_of_val_raw ^⚠	Experimental Returns the ABI-required minimum alignment of the type of the value that `val` points to.
forget_unsized	Experimental Like `forget`, but also accepts unsized values.
size_of_val_raw ^⚠	Experimental Returns the size of the pointed-to value in bytes.
variant_count	Experimental Returns the number of variants in the enum type `T`.

Unions

MaybeUninit

A wrapper type to construct uninitialized instances of T.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/mem/index.html