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//===----------------------------------------------------------------------===//
//
// 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 <size_t I, class... Types>
// typename tuple_element<I, tuple<Types...> >::type&
// get(tuple<Types...>& t);
// UNSUPPORTED: c++98, c++03
#include <tuple>
#include <string>
#include <cassert>
#include "test_macros.h"
#if TEST_STD_VER > 11
struct Empty {};
struct S {
std::tuple<int, Empty> a;
int k;
Empty e;
constexpr S() : a{1,Empty{}}, k(std::get<0>(a)), e(std::get<1>(a)) {}
};
constexpr std::tuple<int, int> getP () { return { 3, 4 }; }
#endif
int main()
{
{
typedef std::tuple<int> T;
T t(3);
assert(std::get<0>(t) == 3);
std::get<0>(t) = 2;
assert(std::get<0>(t) == 2);
}
{
typedef std::tuple<std::string, int> T;
T t("high", 5);
assert(std::get<0>(t) == "high");
assert(std::get<1>(t) == 5);
std::get<0>(t) = "four";
std::get<1>(t) = 4;
assert(std::get<0>(t) == "four");
assert(std::get<1>(t) == 4);
}
{
typedef std::tuple<double&, std::string, int> T;
double d = 1.5;
T t(d, "high", 5);
assert(std::get<0>(t) == 1.5);
assert(std::get<1>(t) == "high");
assert(std::get<2>(t) == 5);
std::get<0>(t) = 2.5;
std::get<1>(t) = "four";
std::get<2>(t) = 4;
assert(std::get<0>(t) == 2.5);
assert(std::get<1>(t) == "four");
assert(std::get<2>(t) == 4);
assert(d == 2.5);
}
#if TEST_STD_VER > 11
{ // get on an rvalue tuple
static_assert ( std::get<0> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 0, "" );
static_assert ( std::get<1> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 1, "" );
static_assert ( std::get<2> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 2, "" );
static_assert ( std::get<3> ( std::make_tuple ( 0.0f, 1, 2.0, 3L )) == 3, "" );
static_assert(S().k == 1, "");
static_assert(std::get<1>(getP()) == 4, "");
}
#endif
}
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