# 1.28.0[−][src]Module core::alloc

Memory allocation APIs

## Structs

Layout | Layout of a block of memory.
LayoutErr | The parameters given to `Layout::from_size_align` or some other `Layout` constructor do not satisfy its documented constraints.
AllocErr | [ Experimental ] The `AllocErr` error indicates an allocation failure that may be due to resource exhaustion or to something wrong when combining the given input arguments with this allocator.
CannotReallocInPlace | [ Experimental ] The `CannotReallocInPlace` error is used when `grow_in_place` or `shrink_in_place` were unable to reuse the given memory block for a requested layout.
Excess | [ Experimental ] Represents the combination of a starting address and a total capacity of the returned block.

## Traits

GlobalAlloc | A memory allocator that can be registered as the standard library’s default though the `#[global_allocator]` attributes.
Alloc | [ Experimental ] An implementation of `Alloc` can allocate, reallocate, and deallocate arbitrary blocks of data described via `Layout`.

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