std::experimental::ranges::invoke
From cppreference.com
< cpp | experimental | ranges
| Defined in header <experimental/ranges/functional>
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| template< class F, class... Args > std::result_of_t<F&&(Args&&...)> invoke( F&& f, Args&&... args ); |
(ranges TS) | |
Invoke the Callable object f with the parameters args, and return the result, as if by return INVOKE(std::forward<F>(f), std::forward<Args>(args)...);, where INVOKE(f, t1, t2, ..., tN) is defined as follows:
- if f is a pointer to member function of class
T:
- If std::is_base_of<T, std::decay_t<decltype(t1)>>::value is true, then INVOKE(f, t1, t2, ..., tN) is equivalent to (t1.*f)(t2, ..., tN),
- otherwise, INVOKE(f, t1, t2, ..., tN) is equivalent to ((*t1).*f)(t2, ..., tN).
- otherwise, if N == 1 and f is a pointer to data member of class
T:
- If std::is_base_of<T, std::decay_t<decltype(t1)>>::value is true, then INVOKE(f, t1) is equivalent to t1.*f,
- otherwise, then INVOKE(f, t1) is equivalent to (*t1).*f.
- otherwise, INVOKE(f, t1, t2, ..., tN) is equivalent to f(t1, t2, ..., tN) (that is, f is a FunctionObject).
Parameters
| f | - | Callable object to be invoked |
| args | - | arguments to pass to f |
See also
| (C++17)(C++23) |
invokes any Callable object with given arguments and possibility to specify return type (since C++23) (function template) |