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 // <array> 11 12 // reference front(); 13 // reference back(); 14 // const_reference front(); // constexpr in C++14 15 // const_reference back(); // constexpr in C++14 16 17 #include <array> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 #include "suppress_array_warnings.h" 23 24 int main() 25 { 26 { 27 typedef double T; 28 typedef std::array<T, 3> C; 29 C c = {1, 2, 3.5}; 30 31 C::reference r1 = c.front(); 32 assert(r1 == 1); 33 r1 = 5.5; 34 assert(c[0] == 5.5); 35 36 C::reference r2 = c.back(); 37 assert(r2 == 3.5); 38 r2 = 7.5; 39 assert(c[2] == 7.5); 40 } 41 { 42 typedef double T; 43 typedef std::array<T, 3> C; 44 const C c = {1, 2, 3.5}; 45 C::const_reference r1 = c.front(); 46 assert(r1 == 1); 47 48 C::const_reference r2 = c.back(); 49 assert(r2 == 3.5); 50 } 51 52 #if TEST_STD_VER > 11 53 { 54 typedef double T; 55 typedef std::array<T, 3> C; 56 constexpr C c = {1, 2, 3.5}; 57 58 constexpr T t1 = c.front(); 59 static_assert (t1 == 1, ""); 60 61 constexpr T t2 = c.back(); 62 static_assert (t2 == 3.5, ""); 63 } 64 #endif 65 66 } 67
