Module `mem`

Basic functions for dealing with memory.

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

Modules

type_info MVP for exposing compile-time information about types in a runtime or const-eval processable way.

Structs

Discriminant Opaque type representing the discriminant of an enum.

Functions

align_of Returns the ABI-required minimum alignment of a type in bytes.
align_of_val Returns the ABI-required minimum alignment of the type of the value that val points to in bytes.
align_of_val_raw Returns the ABI-required minimum alignment of the type of the value that val points to in bytes.
conjure_zst Create a fresh instance of the inhabited ZST type T.
copy Bitwise-copies a value.
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.
forget_unsized Like forget, but also accepts unsized values.
min_align_of Returns the ABI-required minimum alignment of a type in bytes.
min_align_of_val Returns the ABI-required minimum alignment of the type of the value that val points to in bytes.
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.
size_of_val_raw 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_copy Interprets src as having type &Dst, and then reads src without moving the contained value.
uninitialized Bypasses Rust's normal memory-initialization checks by pretending to produce a value of type T, while doing nothing at all.
variant_count Returns the number of variants in the enum type T.
zeroed Returns the value of type T represented by the all-zero byte-pattern.

Macros

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