[#bsl-operator_eq-0a22]
= xref:bsl.adoc[bsl]::operator==
:relfileprefix: ../
:mrdocs:

== Synopsis

Declared in `<bits/memory_resource.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
bool
operator==(
    polymorphic_allocator<BslAllocator_Voidish> const& __a,
    polymorphic_allocator<BslAllocator_Voidish> const& __b) noexcept;
----

[NOTE]
====
This function is a https://en.cppreference.com/w/cpp/language/friend[hidden friend] of xref:bsl/allocator-0a.adoc[allocator<void>], declared inside its base class xref:bsl/polymorphic_allocator.adoc[polymorphic_allocator]: it can be found only through argument-dependent lookup.
====

== Return Value

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====

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