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

Objects of a type with this trait can be compared for equality using `memcmp`. If two objects compare equal, then `memcmp` returns 0, otherwise it returns non‐zero. Classes with this traits are assumed to have no padding and to be bit‐wise copyable (see the `TypeTraitBitwiseCopyable` trait). Undefined behavior may result if this trait is assigned to a type that does not have an `operator==` or whose `operator==` implementation may return different from comparing the footprints with `memcmp` .

== Synopsis

Declared in `<bslalg_typetraitbitwiseequalitycomparable.h>`

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

== Types

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslalg/TypeTraitBitwiseEqualityComparable/Metafunction.adoc[`Metafunction`] 
| Metafunction evaluating to `true_type` if `TYPE` is bitwise equality comparable; otherwise, `false_type`.
| xref:BloombergLP/bslalg/TypeTraitBitwiseEqualityComparable/NestedTraitDeclaration.adoc[`NestedTraitDeclaration`] 
| This class template ties the `bslalg::TypeTraitBitwiseEqualityComparable` trait tag to the `bslmf::IsBitwiseEqualityComparable` trait metafunction.
|===



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