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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <utility>
// template <class T1, class T2> struct pair
// pair(const T1& x, const T2& y);
#include <utility>
#include <cassert>
#include "archetypes.hpp"
#include "test_convertible.hpp"
using namespace ImplicitTypes; // Get implicitly archetypes
struct ExplicitT {
constexpr explicit ExplicitT(int x) : value(x) {}
constexpr explicit ExplicitT(ExplicitT const& o) : value(o.value) {}
int value;
};
struct ImplicitT {
constexpr ImplicitT(int x) : value(x) {}
constexpr ImplicitT(ImplicitT const& o) : value(o.value) {}
int value;
};
template <class T1,
bool CanCopy = true, bool CanConvert = CanCopy>
void test_sfinae() {
using P1 = std::pair<T1, int>;
using P2 = std::pair<int, T1>;
using T1Arg = T1 const&;
using T2 = int const&;
static_assert(std::is_constructible<P1, T1Arg, T2>::value == CanCopy, "");
static_assert(test_convertible<P1, T1Arg, T2>() == CanConvert, "");
static_assert(std::is_constructible<P2, T2, T1Arg>::value == CanCopy, "");
static_assert(test_convertible<P2, T2, T1Arg>() == CanConvert, "");
}
int main()
{
{
typedef std::pair<float, short*> P;
P p(3.5f, 0);
assert(p.first == 3.5f);
assert(p.second == nullptr);
}
{
typedef std::pair<ImplicitT, int> P;
P p(1, 2);
assert(p.first.value == 1);
assert(p.second == 2);
}
{
test_sfinae<AllCtors>();
test_sfinae<ExplicitTypes::AllCtors, true, false>();
test_sfinae<CopyOnly>();
test_sfinae<ExplicitTypes::CopyOnly, true, false>();
test_sfinae<MoveOnly, false>();
test_sfinae<ExplicitTypes::MoveOnly, false>();
test_sfinae<NonCopyable, false>();
test_sfinae<ExplicitTypes::NonCopyable, false>();
}
#if TEST_STD_VER > 11
{
typedef std::pair<float, short*> P;
constexpr P p(3.5f, 0);
static_assert(p.first == 3.5f, "");
static_assert(p.second == nullptr, "");
}
{
using P = std::pair<ExplicitT, int>;
constexpr ExplicitT e(42);
constexpr int x = 10;
constexpr P p(e, x);
static_assert(p.first.value == 42, "");
static_assert(p.second == 10, "");
}
{
using P = std::pair<ImplicitT, int>;
constexpr ImplicitT e(42);
constexpr int x = 10;
constexpr P p = {e, x};
static_assert(p.first.value == 42, "");
static_assert(p.second == 10, "");
}
#endif
}
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