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 // <vector> 11 // UNSUPPORTED: c++98, c++03, c++11, c++14 12 // UNSUPPORTED: libcpp-no-deduction-guides 13 14 15 // template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 16 // deque(InputIterator, InputIterator, Allocator = Allocator()) 17 // -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>; 18 // 19 20 21 #include <vector> 22 #include <iterator> 23 #include <cassert> 24 #include <cstddef> 25 #include <climits> // INT_MAX 26 27 #include "test_macros.h" 28 #include "test_iterators.h" 29 #include "test_allocator.h" 30 31 struct A {}; 32 33 int main() 34 { 35 36 // Test the explicit deduction guides 37 { 38 const int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; 39 std::vector vec(std::begin(arr), std::end(arr)); 40 41 static_assert(std::is_same_v<decltype(vec), std::vector<int>>, ""); 42 assert(std::equal(vec.begin(), vec.end(), std::begin(arr), std::end(arr))); 43 } 44 45 { 46 const long arr[] = {INT_MAX, 1L, 2L, 3L }; 47 std::vector vec(std::begin(arr), std::end(arr), std::allocator<long>()); 48 static_assert(std::is_same_v<decltype(vec)::value_type, long>, ""); 49 assert(vec.size() == 4); 50 assert(vec[0] == INT_MAX); 51 assert(vec[1] == 1L); 52 assert(vec[2] == 2L); 53 } 54 55 // Test the implicit deduction guides 56 57 { 58 // We don't expect this one to work. 59 // std::vector vec(std::allocator<int>()); // vector (allocator &) 60 } 61 62 { 63 std::vector vec(1, A{}); // vector (size_type, T) 64 static_assert(std::is_same_v<decltype(vec)::value_type, A>, ""); 65 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<A>>, ""); 66 assert(vec.size() == 1); 67 } 68 69 { 70 std::vector vec(1, A{}, test_allocator<A>()); // vector (size_type, T, allocator) 71 static_assert(std::is_same_v<decltype(vec)::value_type, A>, ""); 72 static_assert(std::is_same_v<decltype(vec)::allocator_type, test_allocator<A>>, ""); 73 assert(vec.size() == 1); 74 } 75 76 { 77 std::vector vec{1U, 2U, 3U, 4U, 5U}; // vector(initializer-list) 78 static_assert(std::is_same_v<decltype(vec)::value_type, unsigned>, ""); 79 assert(vec.size() == 5); 80 assert(vec[2] == 3U); 81 } 82 83 { 84 std::vector vec({1.0, 2.0, 3.0, 4.0}, test_allocator<double>()); // vector(initializer-list, allocator) 85 static_assert(std::is_same_v<decltype(vec)::value_type, double>, ""); 86 static_assert(std::is_same_v<decltype(vec)::allocator_type, test_allocator<double>>, ""); 87 assert(vec.size() == 4); 88 assert(vec[3] == 4.0); 89 } 90 91 { 92 std::vector<long double> source; 93 std::vector vec(source); // vector(vector &) 94 static_assert(std::is_same_v<decltype(vec)::value_type, long double>, ""); 95 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<long double>>, ""); 96 assert(vec.size() == 0); 97 } 98 99 100 // A couple of vector<bool> tests, too! 101 { 102 std::vector vec(3, true); // vector(initializer-list) 103 static_assert(std::is_same_v<decltype(vec)::value_type, bool>, ""); 104 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<bool>>, ""); 105 assert(vec.size() == 3); 106 assert(vec[0] && vec[1] && vec[2]); 107 } 108 109 { 110 std::vector<bool> source; 111 std::vector vec(source); // vector(vector &) 112 static_assert(std::is_same_v<decltype(vec)::value_type, bool>, ""); 113 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<bool>>, ""); 114 assert(vec.size() == 0); 115 } 116 } 117
