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.at(0); 31 assert(r1 == 1); 32 r1 = 5.5; 33 assert(c.front() == 5.5); 34 35 C::reference r2 = c.at(2); 36 assert(r2 == 3.5); 37 r2 = 7.5; 38 assert(c.back() == 7.5); 39 40 try { (void) c.at(3); } 41 catch (const std::out_of_range &) {} 42 } 43 { 44 typedef double T; 45 typedef std::array<T, 3> C; 46 const C c = {1, 2, 3.5}; 47 C::const_reference r1 = c.at(0); 48 assert(r1 == 1); 49 50 C::const_reference r2 = c.at(2); 51 assert(r2 == 3.5); 52 53 try { (void) c.at(3); } 54 catch (const std::out_of_range &) {} 55 } 56 57 #if TEST_STD_VER > 11 58 { 59 typedef double T; 60 typedef std::array<T, 3> C; 61 constexpr C c = {1, 2, 3.5}; 62 63 constexpr T t1 = c.at(0); 64 static_assert (t1 == 1, ""); 65 66 constexpr T t2 = c.at(2); 67 static_assert (t2 == 3.5, ""); 68 } 69 #endif 70 71 } 72
