std::bad_function_call

 

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Defined in header <functional>
class bad_function_call : public std::exception;		(since C++11)

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

Member functions

(constructor)	constructs the bad_function_call object (public member function)
what [virtual]	returns the explanatory string (virtual public member function)

Inherited from std::exception

Member functions

(destructor) [virtual]	destructs the exception object (virtual public member function of std::exception)
what [virtual]	returns explanatory string (virtual public member function of std::exception)

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

See also

function (C++11)	wraps callable object of any type with specified function call signature (class template)