std::bad_function_call
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                    < cpp | utility | functional
                    
                                                            
                    | 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.
| Contents | 
[edit] Member functions
| (constructor) | bad_function_call() (public member function) | 
std::bad_function_call::bad_function_call()
| bad_function_call(); | ||
Constructs a new instance of std::bad_function_call.
Parameters
(none)
Exceptions
noexcept specification:  
noexcept
  Inherited from std::exception
Member functions
| [virtual] | destructs the exception object (virtual public member function of std::exception) | 
| [virtual] | returns an explanatory string (virtual public member function of std::exception) | 
[edit] Example
Run this code
#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
| (C++11) | wraps callable object of any type with specified function call signature (class template) | 



