d32add4a48
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@209819 91177308-0d34-0410-b5e6-96231b3b80d8
63 lines
1.4 KiB
C++
63 lines
1.4 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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// <algorithm>
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// template<LessThanComparable T>
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// pair<const T&, const T&>
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// minmax(const T& a, const T& b);
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#include <algorithm>
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#include <cassert>
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template <class T>
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void
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test(const T& a, const T& b, const T& x, const T& y)
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{
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std::pair<const T&, const T&> p = std::minmax(a, b);
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assert(&p.first == &x);
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assert(&p.second == &y);
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}
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int main()
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{
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{
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int x = 0;
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int y = 0;
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test(x, y, x, y);
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test(y, x, y, x);
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}
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{
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int x = 0;
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int y = 1;
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test(x, y, x, y);
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test(y, x, x, y);
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}
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{
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int x = 1;
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int y = 0;
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test(x, y, y, x);
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test(y, x, y, x);
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}
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#if _LIBCPP_STD_VER > 11
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{
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// Note that you can't take a reference to a local var, since
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// its address is not a compile-time constant.
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constexpr static int x = 1;
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constexpr static int y = 0;
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constexpr auto p1 = std::minmax (x, y);
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static_assert(p1.first == y, "");
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static_assert(p1.second == x, "");
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constexpr auto p2 = std::minmax (y, x);
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static_assert(p2.first == y, "");
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static_assert(p2.second == x, "");
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}
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#endif
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}
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