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std::any:: reset

From cppreference.net
C++
Utilities library
std::any
void reset ( ) noexcept ;
(since C++17)

If * this contains a value, destroys the contained value.

* this does not contain a value after this call.

Contents

Parameters

(none)

Return value

(none)

Example

Run this code 
#include <any>
#include <cassert>
int main()
{
    std::any a{42};
    assert(a.has_value());
    a.reset();
    assert(not a.has_value());
}

See also

checks if object holds a value
(public member function)