//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03, c++11, c++14
// <optional>
// template <class... Args>
// constexpr explicit optional(in_place_t, Args&&... args);
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
using std::optional;
using std::in_place_t;
using std::in_place;
class X
{
int i_;
int j_ = 0;
public:
X() : i_(0) {}
X(int i) : i_(i) {}
X(int i, int j) : i_(i), j_(j) {}
~X() {}
friend bool operator==(const X& x, const X& y)
{return x.i_ == y.i_ && x.j_ == y.j_;}
};
class Y
{
int i_;
int j_ = 0;
public:
constexpr Y() : i_(0) {}
constexpr Y(int i) : i_(i) {}
constexpr Y(int i, int j) : i_(i), j_(j) {}
friend constexpr bool operator==(const Y& x, const Y& y)
{return x.i_ == y.i_ && x.j_ == y.j_;}
};
class Z
{
public:
Z(int) {TEST_THROW(6);}
};
int main(int, char**)
{
{
constexpr optional<int> opt(in_place, 5);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == 5, "");
struct test_constexpr_ctor
: public optional<int>
{
constexpr test_constexpr_ctor(in_place_t, int i)
: optional<int>(in_place, i) {}
};
}
{
optional<const int> opt(in_place, 5);
assert(*opt == 5);
}
{
const optional<X> opt(in_place);
assert(static_cast<bool>(opt) == true);
assert(*opt == X());
}
{
const optional<X> opt(in_place, 5);
assert(static_cast<bool>(opt) == true);
assert(*opt == X(5));
}
{
const optional<X> opt(in_place, 5, 4);
assert(static_cast<bool>(opt) == true);
assert(*opt == X(5, 4));
}
{
constexpr optional<Y> opt(in_place);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == Y(), "");
struct test_constexpr_ctor
: public optional<Y>
{
constexpr test_constexpr_ctor(in_place_t)
: optional<Y>(in_place) {}
};
}
{
constexpr optional<Y> opt(in_place, 5);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == Y(5), "");
struct test_constexpr_ctor
: public optional<Y>
{
constexpr test_constexpr_ctor(in_place_t, int i)
: optional<Y>(in_place, i) {}
};
}
{
constexpr optional<Y> opt(in_place, 5, 4);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == Y(5, 4), "");
struct test_constexpr_ctor
: public optional<Y>
{
constexpr test_constexpr_ctor(in_place_t, int i, int j)
: optional<Y>(in_place, i, j) {}
};
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
try
{
const optional<Z> opt(in_place, 1);
assert(false);
}
catch (int i)
{
assert(i == 6);
}
}
#endif
return 0;
}