Module mem 

Basic functions for dealing with memory.

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

Macros

offset_ofNon-ferrocene_certified

Expands to the offset in bytes of a field from the beginning of the given type.

Structs

DiscriminantNon-ferrocene_certified

Opaque type representing the discriminant of an enum.

ManuallyDropNon-ferrocene_certified

A wrapper to inhibit the compiler from automatically calling T’s destructor. This wrapper is 0-cost.

AssumeExperimentalNon-ferrocene_certified

Configurable proof assumptions of TransmuteFrom.

DropGuardExperimentalNon-ferrocene_certified

Wrap a value and run a closure when dropped.

Traits

TransmuteFromExperimentalNon-ferrocene_certified

Marks that Src is transmutable into Self.

Functions

align_of

Returns the ABI-required minimum alignment of a type in bytes.

align_of_valNon-ferrocene_certified

Returns the ABI-required minimum alignment of the type of the value that val points to in bytes.

discriminantNon-ferrocene_certified

Returns a value uniquely identifying the enum variant in v.

drop

Disposes of a value.

forgetNon-ferrocene_certified

Takes ownership and “forgets” about the value without running its destructor.

min_align_ofDeprecatedNon-ferrocene_certified

Returns the ABI-required minimum alignment of a type in bytes.

min_align_of_valDeprecatedNon-ferrocene_certified

Returns the ABI-required minimum alignment of the type of the value that val points to in bytes.

needs_dropNon-ferrocene_certified

Returns true if dropping values of type T matters.

replaceNon-ferrocene_certified

Moves src into the referenced dest, returning the previous dest value.

size_of

Returns the size of a type in bytes.

size_of_valNon-ferrocene_certified

Returns the size of the pointed-to value in bytes.

swapNon-ferrocene_certified

Swaps the values at two mutable locations, without deinitializing either one.

takeNon-ferrocene_certified

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^⚠Non-ferrocene_certified

Interprets src as having type &Dst, and then reads src without moving the contained value.

uninitialized^⚠DeprecatedNon-ferrocene_certified

Bypasses Rust’s normal memory-initialization checks by pretending to produce a value of type T, while doing nothing at all.

zeroed^⚠Non-ferrocene_certified

Returns the value of type T represented by the all-zero byte-pattern.

align_of_val_raw^⚠ExperimentalNon-ferrocene_certified

Returns the ABI-required minimum alignment of the type of the value that val points to in bytes.

conjure_zst^⚠ExperimentalNon-ferrocene_certified

Create a fresh instance of the inhabited ZST type T.

copyExperimentalNon-ferrocene_certified

Bitwise-copies a value.

forget_unsizedExperimentalNon-ferrocene_certified

Like forget, but also accepts unsized values.

size_of_val_raw^⚠ExperimentalNon-ferrocene_certified

Returns the size of the pointed-to value in bytes.

variant_countExperimentalNon-ferrocene_certified

Returns the number of variants in the enum type T.

Unions

MaybeUninitNon-ferrocene_certified

A wrapper type to construct uninitialized instances of T.