[#bsl-Pair_BslmaIdiom]
= xref:bsl.adoc[bsl]::Pair_BslmaIdiom
:relfileprefix: ../
:mrdocs:

This component‐private meta‐function determines whether the specified `TYPE` template parameter takes a `bslma::Allocator*` constructor argument and, if so, whether that argument is at the end of the argument list or at the beginning of the argument list following an argument of type `bsl::allocator_arg_t`. This type derived from `bsl::integral_constant<int, N>` where `N` is the number of additional parameters required to pass an allocator to a constructor using the chosen idiom.

== Synopsis

Declared in `<bslstl_pair.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class TYPE>
struct Pair_BslmaIdiom
    : bsl::conditional<!BloombergLP::bslma::UsesBslmaAllocator<TYPE>::value, Pair_BslmaIdiomNone, bsl::conditional<BloombergLP::bslmf::UsesAllocatorArgT<TYPE>::value, Pair_BslmaIdiomAllocatorArgT, Pair_BslmaIdiomAtEnd>::type>::type
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `bsl::conditional<!BloombergLP::bslma::UsesBslmaAllocator<TYPE>::value, Pair_BslmaIdiomNone, bsl::conditional<BloombergLP::bslmf::UsesAllocatorArgT<TYPE>::value, Pair_BslmaIdiomAllocatorArgT, Pair_BslmaIdiomAtEnd>::type>::type`
| 
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#