std::pmr::operator==, std::pmr::operator!=

Since C++17

Header: <memory_resource>

Compares two polymorphic allocators. Two polymorphic allocators compare equal if their underlying memory resource compares equal.

# Declarations

template< class T1, class T2 >
bool operator==( const std::pmr::polymorphic_allocator<T1>& lhs,
const std::pmr::polymorphic_allocator<T2>& rhs ) noexcept;

(since C++17)

friend bool operator==( const polymorphic_allocator& lhs,
const polymorphic_allocator& rhs ) noexcept;

(since C++17)

template< class T1, class T2 >
bool operator!=( const std::pmr::polymorphic_allocator<T1>& lhs,
const std::pmr::polymorphic_allocator<T2>& rhs ) noexcept;

(since C++17) (until C++20)

friend bool operator!=( const polymorphic_allocator& lhs,
const polymorphic_allocator& rhs ) noexcept;

(since C++17) (until C++20)

# Parameters

lhs, rhs: polymorphic allocators to compare

# Defect reports

DR	Applied to	Behavior as published	Correct behavior
LWG 3683	C++17	polymorphic_allocator could not be compared with types convertible to it	overload added