1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // UNSUPPORTED: c++98, c++03, c++11
14 // template <class... Args>
15 // constexpr explicit optional(in_place_t, Args&&... args);
17 #include <experimental/optional>
18 #include <type_traits>
21 #include "test_macros.h"
23 using std::experimental::optional;
24 using std::experimental::in_place_t;
25 using std::experimental::in_place;
34 X(int i, int j) : i_(i), j_(j) {}
38 friend bool operator==(const X& x, const X& y)
39 {return x.i_ == y.i_ && x.j_ == y.j_;}
47 constexpr Y() : i_(0) {}
48 constexpr Y(int i) : i_(i) {}
49 constexpr Y(int i, int j) : i_(i), j_(j) {}
51 friend constexpr bool operator==(const Y& x, const Y& y)
52 {return x.i_ == y.i_ && x.j_ == y.j_;}
58 Z(int) {TEST_THROW(6);}
65 constexpr optional<int> opt(in_place, 5);
66 static_assert(static_cast<bool>(opt) == true, "");
67 static_assert(*opt == 5, "");
69 struct test_constexpr_ctor
70 : public optional<int>
72 constexpr test_constexpr_ctor(in_place_t, int i)
73 : optional<int>(in_place, i) {}
78 const optional<X> opt(in_place);
79 assert(static_cast<bool>(opt) == true);
83 const optional<X> opt(in_place, 5);
84 assert(static_cast<bool>(opt) == true);
88 const optional<X> opt(in_place, 5, 4);
89 assert(static_cast<bool>(opt) == true);
90 assert(*opt == X(5, 4));
93 constexpr optional<Y> opt(in_place);
94 static_assert(static_cast<bool>(opt) == true, "");
95 static_assert(*opt == Y(), "");
97 struct test_constexpr_ctor
100 constexpr test_constexpr_ctor(in_place_t)
101 : optional<Y>(in_place) {}
106 constexpr optional<Y> opt(in_place, 5);
107 static_assert(static_cast<bool>(opt) == true, "");
108 static_assert(*opt == Y(5), "");
110 struct test_constexpr_ctor
113 constexpr test_constexpr_ctor(in_place_t, int i)
114 : optional<Y>(in_place, i) {}
119 constexpr optional<Y> opt(in_place, 5, 4);
120 static_assert(static_cast<bool>(opt) == true, "");
121 static_assert(*opt == Y(5, 4), "");
123 struct test_constexpr_ctor
126 constexpr test_constexpr_ctor(in_place_t, int i, int j)
127 : optional<Y>(in_place, i, j) {}
131 #ifndef TEST_HAS_NO_EXCEPTIONS
135 const optional<Z> opt(in_place, 1);