[#bsl-allocator_traits-0a4]
= xref:bsl.adoc[bsl]::xref:bsl/allocator_traits-0108.adoc[allocator_traits]<ALLOCATOR_TYPE*>
:relfileprefix: ../
:mrdocs:

Empty specialization of `allocator_traits` for pointer allocator types.

== Synopsis

Declared in `<bslma_allocatortraits.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class ALLOCATOR_TYPE>
struct xref:bsl/allocator_traits-0108.adoc[allocator_traits]<ALLOCATOR_TYPE*>;
----

== Description

This is an empty class specialization of `allocator_traits` for pointer types that (intentionally) does not define any of the traits typedefs. It's needed in order make unambiguous function overloads that take both a standard allocator by value and a `bslma::Allocator *`. By using the typedefs defined in `allocator_traits` in the signature of functions taking standard allocators, we can ensure that those overloads are not considered when using `bslma`‐style allocators.


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