| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <tuple> |
| |
| // template <class... Types> class tuple; |
| |
| // template <class U1, class U2> tuple(const pair<U1, U2>& u); |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| #include <tuple> |
| #include <utility> |
| #include <cassert> |
| |
| int main() |
| { |
| { |
| typedef std::pair<double, char> T0; |
| typedef std::tuple<int, short> T1; |
| T0 t0(2.5, 'a'); |
| T1 t1 = t0; |
| assert(std::get<0>(t1) == 2); |
| assert(std::get<1>(t1) == short('a')); |
| } |
| #if _LIBCPP_STD_VER > 11 |
| { |
| typedef std::pair<double, char> P0; |
| typedef std::tuple<int, short> T1; |
| constexpr P0 p0(2.5, 'a'); |
| constexpr T1 t1 = p0; |
| static_assert(std::get<0>(t1) != std::get<0>(p0), ""); |
| static_assert(std::get<1>(t1) == std::get<1>(p0), ""); |
| static_assert(std::get<0>(t1) == 2, ""); |
| static_assert(std::get<1>(t1) == short('a'), ""); |
| } |
| #endif |
| } |