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operator==,!=(std::experimental::function)

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Defined in header <experimental/functional>
template< class R, class... ArgTypes >

bool operator==( const std::experimental::function <R(ArgTypes...)>& f,

                 std::nullptr_t ) noexcept;
(1) (library fundamentals TS)
template< class R, class... ArgTypes >

bool operator==( std::nullptr_t,

                 const std::experimental::function <R(ArgTypes...)>& f ) noexcept;
(2) (library fundamentals TS)
(removed in library fundamentals TS v3)
template< class R, class... ArgTypes >

bool operator!=( const std::experimental::function <R(ArgTypes...)>& f,

                 std::nullptr_t ) noexcept;
(3) (library fundamentals TS)
(removed in library fundamentals TS v3)
template< class R, class... ArgTypes >

bool operator!=( std::nullptr_t,

                 const std::experimental::function <R(ArgTypes...)>& f ) noexcept;
(4) (library fundamentals TS)
(removed in library fundamentals TS v3)

Compares a std::experimental::function with a null pointer. Empty functions (that is, functions without a callable target) compare equal, non-empty functions compare non-equal.

The != operator is synthesized from operator==.

(library fundamentals TS v3)

[edit] Parameters

f - std::experimental::function to compare

[edit] Return value

1,2) !f
3,4) (bool) f

[edit] See also

(removed in C++20)
compares a std::function with nullptr
(function template) [edit]
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