4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <optional>
|
|
|
|
// template <class T> struct hash<optional<T>>;
|
|
|
|
#include <experimental/optional>
|
|
#include <string>
|
|
#include <memory>
|
|
#include <cassert>
|
|
|
|
|
|
int main()
|
|
{
|
|
#if _LIBCPP_STD_VER > 11
|
|
using std::experimental::optional;
|
|
|
|
{
|
|
typedef int T;
|
|
optional<T> opt;
|
|
assert(std::hash<optional<T>>{}(opt) == 0);
|
|
opt = 2;
|
|
assert(std::hash<optional<T>>{}(opt) == std::hash<T>{}(*opt));
|
|
}
|
|
{
|
|
typedef std::string T;
|
|
optional<T> opt;
|
|
assert(std::hash<optional<T>>{}(opt) == 0);
|
|
opt = std::string("123");
|
|
assert(std::hash<optional<T>>{}(opt) == std::hash<T>{}(*opt));
|
|
}
|
|
{
|
|
typedef std::unique_ptr<int> T;
|
|
optional<T> opt;
|
|
assert(std::hash<optional<T>>{}(opt) == 0);
|
|
opt = std::unique_ptr<int>(new int(3));
|
|
assert(std::hash<optional<T>>{}(opt) == std::hash<T>{}(*opt));
|
|
}
|
|
#endif // _LIBCPP_STD_VER > 11
|
|
}
|