1 | //-----------------------------------------------------------------------------
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2 | // boost-libs variant/test/rvalue_test.cpp source file
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3 | // See http://www.boost.org for updates, documentation, and revision history.
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4 | //-----------------------------------------------------------------------------
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5 | //
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6 | // Copyright (c) 2012
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7 | // Antony Polukhin
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8 | //
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9 | // Distributed under the Boost Software License, Version 1.0. (See
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10 | // accompanying file LICENSE_1_0.txt or copy at
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11 | // http://www.boost.org/LICENSE_1_0.txt)
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12 |
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13 | #include "boost/config.hpp"
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14 |
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15 | #include "boost/test/minimal.hpp"
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16 | #include "boost/variant.hpp"
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17 |
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18 | // This test requires BOOST_HAS_RVALUE_REFS
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19 |
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20 | #ifndef BOOST_HAS_RVALUE_REFS
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21 |
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22 | void run()
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23 | {
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24 | BOOST_CHECK(true);
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25 | }
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26 |
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27 | #else
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28 |
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29 | class move_copy_conting_class {
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30 | public:
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31 | static unsigned int moves_count;
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32 | static unsigned int copy_count;
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33 |
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34 | move_copy_conting_class(){}
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35 | move_copy_conting_class(move_copy_conting_class&&) {
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36 | ++ moves_count;
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37 | }
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38 |
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39 | move_copy_conting_class& operator=(move_copy_conting_class&&) {
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40 | ++ moves_count;
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41 | return *this;
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42 | }
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43 |
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44 | move_copy_conting_class(const move_copy_conting_class&) {
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45 | ++ copy_count;
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46 | }
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47 | move_copy_conting_class& operator=(const move_copy_conting_class&) {
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48 | ++ copy_count;
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49 | return *this;
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50 | }
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51 | };
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52 |
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53 | unsigned int move_copy_conting_class::moves_count = 0;
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54 | unsigned int move_copy_conting_class::copy_count = 0;
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55 |
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56 | void run()
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57 | {
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58 | typedef boost::variant<int, move_copy_conting_class> variant_I_type;
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59 | variant_I_type v1, v2;
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60 |
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61 | // Assuring that `move_copy_conting_class` was not created
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62 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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63 | BOOST_CHECK(move_copy_conting_class::moves_count == 0);
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64 |
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65 | v1 = move_copy_conting_class();
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66 | // Assuring that `move_copy_conting_class` was moved at least once
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67 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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68 |
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69 | unsigned int total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
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70 | move_copy_conting_class var;
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71 | v1 = 0;
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72 | move_copy_conting_class::moves_count = 0;
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73 | move_copy_conting_class::copy_count = 0;
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74 | v1 = var;
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75 | // Assuring that move assignment operator moves/copyes value not more times than copy assignment operator
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76 | BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
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77 |
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78 | move_copy_conting_class::moves_count = 0;
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79 | move_copy_conting_class::copy_count = 0;
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80 | v2 = static_cast<variant_I_type&&>(v1);
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81 | // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
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82 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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83 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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84 |
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85 | v1 = move_copy_conting_class();
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86 | move_copy_conting_class::moves_count = 0;
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87 | move_copy_conting_class::copy_count = 0;
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88 | v2 = static_cast<variant_I_type&&>(v1);
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89 | // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
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90 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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91 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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92 | total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
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93 | move_copy_conting_class::moves_count = 0;
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94 | move_copy_conting_class::copy_count = 0;
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95 | v1 = v2;
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96 | // Assuring that move assignment operator moves/copyes value not more times than copy assignment operator
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97 | BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
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98 |
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99 |
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100 | typedef boost::variant<move_copy_conting_class, int> variant_II_type;
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101 | variant_II_type v3;
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102 | move_copy_conting_class::moves_count = 0;
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103 | move_copy_conting_class::copy_count = 0;
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104 | v1 = static_cast<variant_II_type&&>(v3);
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105 | // Assuring that `move_copy_conting_class` in v3 was moved at least once (v1 and v3 have different types)
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106 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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107 |
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108 | move_copy_conting_class::moves_count = 0;
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109 | move_copy_conting_class::copy_count = 0;
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110 | v2 = static_cast<variant_I_type&&>(v1);
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111 | // Assuring that `move_copy_conting_class` in v1 was moved at least once (v1 and v3 have different types)
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112 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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113 |
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114 | move_copy_conting_class::moves_count = 0;
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115 | move_copy_conting_class::copy_count = 0;
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116 | variant_I_type v5(static_cast<variant_I_type&&>(v1));
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117 | // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
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118 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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119 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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120 |
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121 | total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
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122 | move_copy_conting_class::moves_count = 0;
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123 | move_copy_conting_class::copy_count = 0;
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124 | variant_I_type v6(v1);
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125 | // Assuring that move constructor moves/copyes value not more times than copy constructor
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126 | BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
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127 | }
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128 |
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129 |
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130 | #endif
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131 |
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132 |
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133 | int test_main(int , char* [])
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134 | {
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135 | run();
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136 | return 0;
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137 | }
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