[#bsl-allocator_traits-0ae-select_on_container_copy_construction]
= xref:bsl.adoc[bsl]::xref:bsl/allocator_traits-0ae.adoc[allocator_traits<std::allocator<ALLOCATOR_TYPE>>]::select_on_container_copy_construction
:relfileprefix: ../../
:mrdocs:

Obtain an allocator to use when copying a container.

== Synopsis

Declared in `<bslma_allocatortraits.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
static
_Alloc
select_on_container_copy_construction(_Alloc const& __rhs);
----

== Description

Returns `__rhs.select_on_container_copy_construction()` if that expression is well‐formed, otherwise returns ___rhs_

== Return Value

`__rhs.select_on_container_copy_construction()` or ___rhs_

== Parameters

[cols="1,4"]
|===
| Name| Description
| *__rhs*
| An allocator.
|===


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