[#BloombergLP-bslma-UsesBslmaAllocator_DeprecatedIf-0f]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::UsesBslmaAllocator_DeprecatedIf
:relfileprefix: ../../
:mrdocs:

For compilers that support a deprecation annotation, this empty `struct` has a static `check` function that yields a deprecation warning when called (including within an unevaluated context) if this class is instantiated with a `true` argument, but not if instantiated with a `false` argument.

== Synopsis

Declared in `<bslma_usesbslmaallocator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<bool>
struct UsesBslmaAllocator_DeprecatedIf;
----

== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslma/UsesBslmaAllocator_DeprecatedIf-0f/check.adoc[`check`] 
| Ignore the specified `message` and return a `char`. Declared but not defined; for metaprogramming only.
|===


== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslma/UsesBslmaAllocator_DeprecatedIf-0a.adoc[`UsesBslmaAllocator_DeprecatedIf<true>`] 
| Using this specialization of `UsesBslmaAllocator_DeprecatedIf` yields a deprecation warning on compilers that support a deprecation annotation.
|===



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