You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
934 B
45 lines
934 B
#include <cstdio>
|
|
#include <iterator>
|
|
#include <memory>
|
|
#include <optional>
|
|
#include <unordered_map>
|
|
|
|
#ifdef _MSC_VER
|
|
# include <comdef.h>
|
|
#endif
|
|
|
|
template <typename T,
|
|
typename std::invoke_result<decltype(&T::get), T>::type = nullptr>
|
|
typename T::pointer get_ptr(T& item)
|
|
{
|
|
return item.get();
|
|
}
|
|
|
|
int main()
|
|
{
|
|
int a[] = { 0, 1, 2 };
|
|
auto ai = std::cbegin(a);
|
|
|
|
int b[] = { 2, 1, 0 };
|
|
auto bi = std::cend(b);
|
|
|
|
auto ci = std::size(a);
|
|
|
|
std::unique_ptr<int> u(new int(0));
|
|
|
|
// Intel compiler do not handle correctly 'decltype' inside 'invoke_result'
|
|
get_ptr(u);
|
|
|
|
#ifdef _MSC_VER
|
|
// clang-cl has problems instantiating this constructor in C++17 mode
|
|
// error: indirection requires pointer operand ('const _GUID' invalid)
|
|
// return *_IID;
|
|
IUnknownPtr ptr{};
|
|
IDispatchPtr disp(ptr);
|
|
#endif
|
|
|
|
std::optional<int> oi = 0;
|
|
|
|
return *u + *ai + *(bi - 1) + (3 - static_cast<int>(ci)) + oi.value();
|
|
}
|