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1 // Copyright (C) 2020 Free Software Foundation, Inc.
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2 // This file is part of the GNU ISO C++ Library. This library is free
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3 // software; you can redistribute it and/or modify it under the
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4 // terms of the GNU General Public License as published by the
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5 // Free Software Foundation; either version 3, or (at your option)
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6 // any later version.
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7
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8 // This library is distributed in the hope that it will be useful,
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9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 // GNU General Public License for more details.
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12
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13 // You should have received a copy of the GNU General Public License along
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14 // with this library; see the file COPYING3. If not see
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15 // <http://www.gnu.org/licenses/>.
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16
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17 // { dg-options "-std=gnu++2a" }
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18 // { dg-do run { target c++2a } }
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19
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20 #include <algorithm>
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21 #include <cstring>
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22 #include <deque>
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23 #include <list>
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24 #include <memory>
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25 #include <span>
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26 #include <string>
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27 #include <vector>
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28
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29 #include <testsuite_hooks.h>
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30 #include <testsuite_iterators.h>
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31
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32 using __gnu_test::test_forward_range;
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33
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34 namespace ranges = std::ranges;
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35
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36 template<typename T>
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37 void
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38 test01()
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39 {
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40 static_assert(std::default_initializable<T>);
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41 static_assert(std::equality_comparable<T>);
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42
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43 for (int k = 0; k < 6; k++)
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44 {
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45 constexpr int size = 1024;
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46 auto buffer = std::unique_ptr<char[]>(new char[sizeof(T)*size]);
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47 std::span<T> rx((T *)buffer.get(), size);
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48
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49 T t{};
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50
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51 auto i = rx.begin();
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52 if (k == 0)
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53 i = ranges::uninitialized_value_construct(rx.begin(), rx.end());
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54 else if (k == 1)
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55 i = ranges::uninitialized_value_construct(rx);
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56 else if (k == 2)
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57 i = ranges::uninitialized_value_construct_n(rx.begin(), 1024);
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58 else if (k == 3)
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59 i = ranges::uninitialized_value_construct(rx.begin(), rx.end());
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60 else if (k == 4)
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61 i = ranges::uninitialized_value_construct(std::as_const(rx));
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62 else if (k == 5)
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63 i = ranges::uninitialized_value_construct_n(rx.begin(), 1024);
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64 else
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65 __builtin_abort();
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66
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67 VERIFY( i == rx.end() );
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68 VERIFY( ranges::find_if(rx, [&t](const T& v) { return t != v; }) == i );
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69
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70 ranges::destroy(rx);
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71 }
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72 }
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73
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74 struct X
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75 {
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76 static constexpr int limit = 67;
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77 static inline int construct_count = 0;
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78 static inline int destruct_count = 0;
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79
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80 struct exception {};
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81
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82 bool live = false;
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83
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84 X()
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85 {
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86 if (construct_count >= limit)
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87 throw exception{};
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88 construct_count++;
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89 live = true;
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90 }
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91
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92 ~X()
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93 {
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94 VERIFY( live );
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95 live = false;
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96 destruct_count++;
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97 }
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98 };
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99
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100 template<bool test_sized>
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101 void
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102 test02()
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103 {
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104 constexpr int size = 100;
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105 auto buffer = std::unique_ptr<char[]>(new char[sizeof(X)*size]);
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106 test_forward_range<X> rx((X *)buffer.get(), (X *)buffer.get() + size);
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107 try
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108 {
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109 X::construct_count = 0;
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110 X::destruct_count = 0;
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111 if constexpr (test_sized)
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112 ranges::uninitialized_value_construct_n(rx.begin(), size);
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113 else
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114 ranges::uninitialized_value_construct(rx);
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115 VERIFY( false && "exception not thrown" );
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116 }
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117 catch (const X::exception&)
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118 {
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119 VERIFY( X::construct_count == X::limit );
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120 VERIFY( X::destruct_count == X::limit );
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121 }
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122 }
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123
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124 int
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125 main()
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126 {
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127 test01<char>();
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128 test01<int>();
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129 test01<long long>();
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130 test01<float>();
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131 test01<double>();
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132 test01<std::vector<char>>();
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133 test01<std::string>();
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134 test01<std::deque<double>>();
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135 test01<std::list<std::vector<std::deque<double>>>>();
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136 test01<std::unique_ptr<std::string>>();
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137
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138 test02<false>();
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139 test02<true>();
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140 }
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