| //===----------------------------------------------------------------------===// |
| // |
| // 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, c++11, c++14 |
| // <optional> |
| |
| // constexpr optional(const optional<T>& rhs); |
| // If is_trivially_copy_constructible_v<T> is true, |
| // this constructor shall be a constexpr constructor. |
| |
| #include <optional> |
| #include <type_traits> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| struct S { |
| constexpr S() : v_(0) {} |
| S(int v) : v_(v) {} |
| S(const S &rhs) : v_(rhs.v_) {} // make it not trivially copyable |
| int v_; |
| }; |
| |
| |
| int main() |
| { |
| static_assert (!std::is_trivially_copy_constructible_v<S>, "" ); |
| constexpr std::optional<S> o1; |
| constexpr std::optional<S> o2 = o1; // not constexpr |
| } |
