minmax.pass.cpp (1472B)
1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <algorithm> 11 12 // template<LessThanComparable T> 13 // pair<const T&, const T&> 14 // minmax(const T& a, const T& b); 15 16 #include <algorithm> 17 #include <cassert> 18 19 #include "test_macros.h" 20 21 template <class T> 22 void 23 test(const T& a, const T& b, const T& x, const T& y) 24 { 25 std::pair<const T&, const T&> p = std::minmax(a, b); 26 assert(&p.first == &x); 27 assert(&p.second == &y); 28 } 29 30 int main() 31 { 32 { 33 int x = 0; 34 int y = 0; 35 test(x, y, x, y); 36 test(y, x, y, x); 37 } 38 { 39 int x = 0; 40 int y = 1; 41 test(x, y, x, y); 42 test(y, x, x, y); 43 } 44 { 45 int x = 1; 46 int y = 0; 47 test(x, y, y, x); 48 test(y, x, y, x); 49 } 50 #if TEST_STD_VER >= 14 51 { 52 // Note that you can't take a reference to a local var, since 53 // its address is not a compile-time constant. 54 constexpr static int x = 1; 55 constexpr static int y = 0; 56 constexpr auto p1 = std::minmax (x, y); 57 static_assert(p1.first == y, ""); 58 static_assert(p1.second == x, ""); 59 constexpr auto p2 = std::minmax (y, x); 60 static_assert(p2.first == y, ""); 61 static_assert(p2.second == x, ""); 62 } 63 #endif 64 }