std::copyable_function::operator()
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< cpp | utility | functional | copyable function
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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) is equivalent to:
- f if cv ref is either empty or &, or
- std::as_const (f) if cv ref is either const or const &, or
- std::move(f) if cv ref is &&, or
- std::move(std::as_const (f)) if cv ref is const &&.
The behavior is undefined if *this is empty.
[edit] Parameters
args
-
parameters to pass to the stored callable target
[edit] Return value
std::invoke_r <R>(/*cv-ref-cast*/(f), std::forward <Args>(args)...).
[edit] Exceptions
Propagates the exception thrown by the underlying function call.
[edit] Example
This section is incomplete
Reason: no example
Reason: no example