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 operator[] (size_type) 13 // const_reference operator[] (size_type); // constexpr in C++14 14 // reference at (size_type) 15 // const_reference at (size_type); // 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 C::reference r1 = c[0]; 31 assert(r1 == 1); 32 r1 = 5.5; 33 assert(c.front() == 5.5); 34 35 C::reference r2 = c[2]; 36 assert(r2 == 3.5); 37 r2 = 7.5; 38 assert(c.back() == 7.5); 39 } 40 { 41 typedef double T; 42 typedef std::array<T, 3> C; 43 const C c = {1, 2, 3.5}; 44 C::const_reference r1 = c[0]; 45 assert(r1 == 1); 46 C::const_reference r2 = c[2]; 47 assert(r2 == 3.5); 48 } 49 50 #if TEST_STD_VER > 11 51 { 52 typedef double T; 53 typedef std::array<T, 3> C; 54 constexpr C c = {1, 2, 3.5}; 55 56 constexpr T t1 = c[0]; 57 static_assert (t1 == 1, ""); 58 59 constexpr T t2 = c[2]; 60 static_assert (t2 == 3.5, ""); 61 } 62 #endif 63 64 } 65
