get_const.fail.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b
1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// This file is distributed under the University of Illinois Open Source 6bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// License. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <tuple> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class... Types> class tuple; 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <size_t I, class... Types> 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// typename tuple_element<I, tuple<Types...> >::type const& 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// get(const tuple<Types...>& t); 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <tuple> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <string> 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::tuple<double&, std::string, int> T; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant double d = 1.5; 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const T t(d, "high", 5); 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::get<0>(t) == 1.5); 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::get<1>(t) == "high"); 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::get<2>(t) == 5); 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::get<0>(t) = 2.5; 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::get<0>(t) == 2.5); 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::get<1>(t) == "high"); 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::get<2>(t) == 5); 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(d == 2.5); 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::get<1>(t) = "four"; 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 40