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std::bad_function_call

Defined in header <functional>
class bad_function_call;
(since C++11)

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

cpp/error/exceptionstd-bad function call-inheritance.svg

Inheritance diagram.

Member functions

(constructor)
constructs the bad_function_call object
(public member function)

std::bad_function_call::bad_function_call()

bad_function_call() noexcept;

Constructs a new instance of std::bad_function_call.

Parameters

(none).

Inherited from std::exception

Member functions

[virtual]
destroys the exception object
(virtual public member function of std::exception)
[virtual]
returns an 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';
    }
}

Possible output:

bad function call

See also

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

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