[#BloombergLP-bslstl-Variant_AllocatorBase-0e-mechanism]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::xref:BloombergLP/bslstl/Variant_AllocatorBase-0e.adoc[Variant_AllocatorBase]::mechanism
:relfileprefix: ../../../
:mrdocs:

Return a null pointer. Note that this method has the same return type as the allocator‐aware version so that the remainder of the implementation of `bsl::variant` is abstracted with respect to whether or not the specialization is allocator‐aware; this is why both methods return `bslma::Allocator*` instead of `bsl::allocator<char>`. The returned pointer will be ignored (and not dereferenced) when passed to `bslma::ConstructionUtil::construct`.

== Synopsis

Declared in `<bslstl_variant.h>`

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