Module scale_info::prelude::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_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.
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.

Unions

MaybeUninit

A wrapper type to construct uninitialized instances of T.