Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is dual licensed under the MIT and the University of Illinois Open |
| 6 | // Source Licenses. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // <optional> |
| 11 | |
| 12 | // optional(const optional<T>& rhs); |
| 13 | |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 14 | #include <experimental/optional> |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 15 | #include <type_traits> |
| 16 | #include <cassert> |
| 17 | |
| 18 | #if _LIBCPP_STD_VER > 11 |
| 19 | |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 20 | using std::experimental::optional; |
| 21 | |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 22 | template <class T> |
| 23 | void |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 24 | test(const optional<T>& rhs, bool is_going_to_throw = false) |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 25 | { |
| 26 | bool rhs_engaged = static_cast<bool>(rhs); |
| 27 | try |
| 28 | { |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 29 | optional<T> lhs = rhs; |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 30 | assert(is_going_to_throw == false); |
| 31 | assert(static_cast<bool>(lhs) == rhs_engaged); |
| 32 | if (rhs_engaged) |
| 33 | assert(*lhs == *rhs); |
| 34 | } |
| 35 | catch (int i) |
| 36 | { |
| 37 | assert(i == 6); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | class X |
| 42 | { |
| 43 | int i_; |
| 44 | public: |
| 45 | X(int i) : i_(i) {} |
| 46 | X(const X& x) : i_(x.i_) {} |
| 47 | ~X() {i_ = 0;} |
| 48 | friend bool operator==(const X& x, const X& y) {return x.i_ == y.i_;} |
| 49 | }; |
| 50 | |
| 51 | class Y |
| 52 | { |
| 53 | int i_; |
| 54 | public: |
| 55 | Y(int i) : i_(i) {} |
| 56 | Y(const Y& x) : i_(x.i_) {} |
| 57 | |
| 58 | friend constexpr bool operator==(const Y& x, const Y& y) {return x.i_ == y.i_;} |
| 59 | }; |
| 60 | |
| 61 | int count = 0; |
| 62 | |
| 63 | class Z |
| 64 | { |
| 65 | int i_; |
| 66 | public: |
| 67 | Z(int i) : i_(i) {} |
| 68 | Z(const Z&) |
| 69 | { |
| 70 | if (++count == 2) |
| 71 | throw 6; |
| 72 | } |
| 73 | |
| 74 | friend constexpr bool operator==(const Z& x, const Z& y) {return x.i_ == y.i_;} |
| 75 | }; |
| 76 | |
| 77 | |
| 78 | #endif // _LIBCPP_STD_VER > 11 |
| 79 | |
| 80 | int main() |
| 81 | { |
| 82 | #if _LIBCPP_STD_VER > 11 |
| 83 | { |
| 84 | typedef int T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 85 | optional<T> rhs; |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 86 | test(rhs); |
| 87 | } |
| 88 | { |
| 89 | typedef int T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 90 | optional<T> rhs(3); |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 91 | test(rhs); |
| 92 | } |
| 93 | { |
| 94 | typedef X T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 95 | optional<T> rhs; |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 96 | test(rhs); |
| 97 | } |
| 98 | { |
| 99 | typedef X T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 100 | optional<T> rhs(X(3)); |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 101 | test(rhs); |
| 102 | } |
| 103 | { |
| 104 | typedef Y T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 105 | optional<T> rhs; |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 106 | test(rhs); |
| 107 | } |
| 108 | { |
| 109 | typedef Y T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 110 | optional<T> rhs(Y(3)); |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 111 | test(rhs); |
| 112 | } |
| 113 | { |
| 114 | typedef Z T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 115 | optional<T> rhs; |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 116 | test(rhs); |
| 117 | } |
| 118 | { |
| 119 | typedef Z T; |
Marshall Clow | 0cdbe60 | 2013-11-15 22:42:10 +0000 | [diff] [blame] | 120 | optional<T> rhs(Z(3)); |
Howard Hinnant | 01afa5c | 2013-09-02 20:30:37 +0000 | [diff] [blame] | 121 | test(rhs, true); |
| 122 | } |
| 123 | #endif // _LIBCPP_STD_VER > 11 |
| 124 | } |