std::bad_function_call

From Cppreference

std::bad_function_call is the type of the exception thrown by function::operator() if the function wrapper has no target.

[edit] Member functions

[edit] Example

#include <iostream>
#include <functional>
int main()
{
    std::function<int()> f = nullptr;
    try {
        f();
    } catch(const std::bad_function_call& e) {
        std::cout << e.what() << '\n';
    }
}

Output:

bad function call

[edit] See also