The alias template indirect_result_t obtains the result type of invoking an invocable type F on the result of dereferencing indirectly_readable types Is....
#include <iterator>
#include <type_traits>
struct Fn
{
long operator()(const int&);
int operator()(int&&);
short operator()(int, int) const;
auto operator()(const float) -> int&;
void operator()(int[8]);
};
static_assert(
std::is_same_v<std::indirect_result_t<Fn, const int*>, long> and
std::is_same_v<std::indirect_result_t<Fn, std::move_iterator<int*>>, int> and
std::is_same_v<std::indirect_result_t<const Fn, int*, int*>, short> and
std::is_same_v<std::indirect_result_t<Fn, float*>, int&> and
std::is_same_v<std::indirect_result_t<Fn, int**>, void>
);
int main() {}[edit] See also
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