std::function::target_type

1	`const` `std::type_info& target_type()` `const;`

(since C++11)

Returns the type of the stored function.

Parameters

(none).

Return value

typeid(T) if the stored function has type T, otherwise typeid(void).

Exceptions

noexcept specification:

noexcept

Example

#include <functional>
#include <iostream>
  
int f(int a) { return -a; }
int main()
{
    // fn1 and fn2 have the same type, but their targets do not
    std::function<int(int)> fn1(f),
                            fn2([](int a) {return -a;});
    std::cout << fn1.target_type().name() << '\n'
              << fn2.target_type().name() << '\n';
}

Possible output:

int (*)(int)
main::$_0

std::function::target_type

Parameters

Return value

Exceptions

Example

See also