Expand description
Basic functions for dealing with memory.
This module contains functions for querying the size and alignment of types, initializing and manipulating memory.
Macros§
- offset_of 
- Expands to the offset in bytes of a field from the beginning of the given type.
Structs§
- Discriminant
- Opaque type representing the discriminant of an enum.
- ManuallyDrop 
- A wrapper to inhibit the compiler from automatically calling T’s destructor. This wrapper is 0-cost.
- AssumeExperimental 
- Configurable proof assumptions of TransmuteFrom.
Traits§
- TransmuteFrom Experimental 
- Marks that Srcis transmutable intoSelf.
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 valpoints to in bytes.
- 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 in bytes.
- min_align_ of_ val Deprecated 
- Returns the ABI-required minimum alignment of the type of the value that valpoints to in bytes.
- needs_drop 
- Returns trueif dropping values of typeTmatters.
- replace
- Moves srcinto the referenceddest, returning the previousdestvalue.
- 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 destwith the default value ofT, returning the previousdestvalue.
- transmute⚠
- Reinterprets the bits of a value of one type as another type.
- transmute_copy ⚠
- Interprets srcas having type&Dst, and then readssrcwithout 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 Trepresented by the all-zero byte-pattern.
- align_of_ ⚠val_ raw Experimental 
- Returns the ABI-required minimum alignment of the type of the value that valpoints to in bytes.
- copyExperimental 
- Bitwise-copies a value.
- 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.