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54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <utility>
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// template <class T1, class T2> struct pair
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// template<size_t I, class T1, class T2>
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// typename tuple_element<I, std::pair<T1, T2> >::type&
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// get(pair<T1, T2>&);
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#include <utility>
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#include <cassert>
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#include "test_macros.h"
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#if TEST_STD_VER > 11
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struct S {
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std::pair<int, int> a;
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int k;
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constexpr S() : a{1,2}, k(std::get<0>(a)) {}
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};
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constexpr std::pair<int, int> getP () { return { 3, 4 }; }
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#endif
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int main()
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{
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{
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typedef std::pair<int, short> P;
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P p(3, static_cast<short>(4));
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assert(std::get<0>(p) == 3);
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assert(std::get<1>(p) == 4);
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std::get<0>(p) = 5;
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std::get<1>(p) = 6;
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assert(std::get<0>(p) == 5);
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assert(std::get<1>(p) == 6);
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}
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#if TEST_STD_VER > 11
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{
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static_assert(S().k == 1, "");
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static_assert(std::get<1>(getP()) == 4, "");
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}
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#endif
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}
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