[#bsl-Pair_First-00-2constructor-0a5]
= xref:bsl.adoc[bsl]::xref:bsl/Pair_First-00.adoc[Pair_First]::Pair_First
:relfileprefix: ../../
:mrdocs:

Construct the `first` member using the specified `value` and `basicAllocator`, with `Pair_BslmaIdiomAtEnd` placement.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class PARAM>
Pair_First(
    PARAM&& value,
    xref:BloombergLP/bslma/Allocator.adoc[BloombergLP::bslma::Allocator]* basicAllocator,
    xref:bsl/Pair_BslmaIdiomAtEnd.adoc[Pair_BslmaIdiomAtEnd] idiom);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *value*
| value forwarded to the constructor of `TYPE`
| *basicAllocator*
| allocator used to supply memory
| *idiom*
| tag selecting the trailing‐allocator construction idiom
|===


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