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operator==,!=(std::scoped_allocator_adaptor)

Defined in header <scoped_allocator> 
template< class OuterAlloc1, class OuterAlloc2, class... InnerAllocs >
bool operator==( const scoped_allocator_adaptor<OuterAlloc1, InnerAllocs...>& lhs, 
                 const scoped_allocator_adaptor<OuterAlloc2, InnerAllocs...>& rhs ) noexcept;
 (since C++11) 
template< class OuterAlloc1, class OuterAlloc2, class... InnerAllocs >
bool operator!=( const scoped_allocator_adaptor<OuterAlloc1, InnerAllocs...>& lhs, 
                 const scoped_allocator_adaptor<OuterAlloc2, InnerAllocs...>& rhs ) noexcept;
 (since C++11)
(until C++20)

Compares two scoped allocator adaptors. Two such allocators are equal if:

  • lhs.outer_allocator() == rhs.outer_allocator(), and
  • if sizeof...(InnerAllocs) > 0, lhs.inner_allocator() == rhs.inner_allocator().

The != operator is synthesized from operator==.

 (since C++20)

Parameters

lhs, rhs - scoped allocator adaptors to compare

Return value

1) Returns true if lhs and rhs are equal, false otherwise.
2) Returns true if lhs and rhs are not equal, false otherwise.

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https://en.cppreference.com/w/cpp/memory/scoped_allocator_adaptor/operator_cmp