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operator==,!=(std::function) — cppreference.com

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template< class R, class... ArgTypes > bool operator==( const function<R(ArgTypes...)>& f, std::nullptr_t );

 (1)

template< class R, class... ArgTypes > bool operator==( std::nullptr_t, const function<R(ArgTypes...)>& f );

 (2)

template< class R, class... ArgTypes > bool operator!=( const function<R(ArgTypes...)>& f, std::nullptr_t );

 (3)

template< class R, class... ArgTypes > bool operator!=( std::nullptr_t, const function<R(ArgTypes...)>& f );

 (4)

Compare une std::function avec un pointeur nul .

Original:

Compares a std::function with a null pointer.

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Paramètres

f -

std::function à comparer

Original:

std::function to compare

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Retourne la valeur

1-2) !f

3-4) (bool) f

Exemple