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

Construct the `first` member of a `pair`, using the specified `basicAllocator` to supply memory. This constructor is selected when (template parameter) `TYPE` takes a `bslma`‐style allocator as the last constructor argument.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
Pair_First(
    xref:BloombergLP/bslma/Allocator.adoc[BloombergLP::bslma::Allocator]* basicAllocator,
    xref:bsl/Pair_BslmaIdiomAtEnd.adoc[Pair_BslmaIdiomAtEnd]);
----


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