[#BloombergLP-bslalg-TypeTraitBitwiseCopyable]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslalg.adoc[bslalg]::TypeTraitBitwiseCopyable
:relfileprefix: ../../
:mrdocs:

Objects of a type with this trait can be copied using `memcpy`. After such a bitwise copy, both the original and the copy are valid. Classes with this trait are assumed to have trivial (no‐op) destructors and are assumed to be bitwise moveable (see the `TypeTraitBitwiseMoveable` trait). Undefined behavior may result if this trait is assigned to a type that allocates memory or other resources, uses virtual inheritance, or places pointers to itself within other data structures. Also, objects of a type with this trait can be destroyed by a no‐op, i.e., not invoking the destructor, although it is safe to write zeros into the memory footprint of the object.

== Synopsis

Declared in `<bslalg_typetraitbitwisecopyable.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct TypeTraitBitwiseCopyable;
----

== Types

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslalg/TypeTraitBitwiseCopyable/Metafunction.adoc[`Metafunction`] 
| This class template ties the `bslalg::TypeTraitBitwiseCopyable` trait tag to the `bslmf::IsBitwiseCopyable` trait metafunction.
| xref:BloombergLP/bslalg/TypeTraitBitwiseCopyable/NestedTraitDeclaration.adoc[`NestedTraitDeclaration`] 
| This class template ties the `bslalg::TypeTraitBitwiseCopyable` trait tag to the `bsl::is_trivially_copyable` trait metafunction.
|===



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