std::function<R(Args...)>::assign

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std::function
template < class F, class Alloc >
void assign( F&& f, const Alloc& alloc ) ;
(since C++11)
(removed in C++17)

Initializes the target with f. The alloc is used to allocate memory for any internal data structures that the function might use.

Equivalent to function( std::allocator_arg, alloc, std::forward <F> (f) ).swap ( *this) ;

Parameters

f - callable function to initialize the target with
alloc - allocator to use to allocate memory for the internal data structures

Return value

(none)

Exceptions

May throw implementation-defined exceptions.

See also

 assigns a new target
(public member function)
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