std::copyable_function::operator()

R operator( ) ( Args... args ) /*cv*/ /*ref*/ noexcept ( /*noex*/ ) ;		(since C++26)

Invokes the stored callable target with the parameters args. The /*cv*/, /*ref*/, and /*noex*/ parts of operator() are identical to those of the template parameter of std::copyable_function

Equivalent to return std::invoke_r <R> ( /*cv-ref-cast*/ (f), std::forward <Args> (args)...) ; , where f is a cv-unqualified lvalue that denotes the target object of *this, and /*cv-ref-cast*/(f)

• f if cv ref is either empty or &
• std::as_const(f) if cv ref is either const or const &
• std::move(f) if cv ref is &&
• std:: move ( std::as_const (f) ) if cv ref is const &&

The behavior is undefined if *this is empty.

Parameters

args

-

parameters to pass to the stored callable target

Return value

std::invoke_r <R> ( /*cv-ref-cast*/ (f), std::forward <Args> (args)...)

Exceptions

Propagates the exception thrown by the underlying function call.

Example

This section is incomplete Reason: no example

See also

operator()	invokes the target (public member function of std::function<R(Args...)>)
operator()	invokes the target (public member function of std::move_only_function)
operator()	calls the stored function (public member function of std::reference_wrapper<T>)
invokeinvoke_r (C++17)(C++23)	invokes any Callable object with given arguments and possibility to specify return type(since C++23) (function template)