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

A `TYPE` with this trait has two data members, `first` and `second` of types `T::first_type` and `T::second_type`, respectively.

== Synopsis

Declared in `<bslalg_typetraitpair.h>`

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

== Types

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslalg/TypeTraitPair/Metafunction.adoc[`Metafunction`] 
| Metafunction yielding `bslmf::IsPair<TYPE>`.
| xref:BloombergLP/bslalg/TypeTraitPair/NestedTraitDeclaration.adoc[`NestedTraitDeclaration`] 
| This class template ties the `bslalg::TypeTraitPair` trait tag to the `bslmf::IsPair` trait metafunction.
|===



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