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std::experimental::ranges::invoke

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< cpp‎ | experimental‎ | ranges
 
 
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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 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).
  • 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)


[edit] Parameters

f - Callable object to be invoked
args - arguments to pass to f

[edit] See also

(C++17)
invokes any Callable object with given arguments
(function template) [edit]