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1 //----------------------------------------------------------------------------- |
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2 // boost-libs variant/test/test8.cpp header 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) 2003 |
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7 // Eric Friedman, Itay Maman |
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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 * © Portions copyright (c) 2006-2007 Nokia Corporation. All rights reserved. |
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14 */ |
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15 |
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16 #include "boost/test/minimal.hpp" |
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17 #include "boost/variant.hpp" |
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18 |
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19 #include <iostream> |
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20 #include <vector> |
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21 #include <string> |
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22 |
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23 using namespace std; |
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24 using namespace boost; |
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25 |
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26 typedef variant<float, std::string, int, std::vector<std::string> > t_var1; |
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27 |
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28 struct int_sum : static_visitor<> |
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29 { |
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30 int_sum() : result_(0) { } |
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31 |
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32 void operator()(int t) |
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33 { |
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34 result_ += t; |
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35 } |
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36 |
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37 result_type operator()(float ) { } |
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38 result_type operator()(const std::string& ) { } |
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39 result_type operator()(const std::vector<std::string>& ) { } |
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40 |
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41 int result_; |
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42 }; |
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43 |
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44 template <typename T, typename Variant> |
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45 T& check_pass(Variant& v, T value) |
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46 { |
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47 BOOST_CHECK(get<T>(&v)); |
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48 |
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49 try |
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50 { |
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51 T& r = get<T>(v); |
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52 BOOST_CHECK(r == value); |
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53 return r; |
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54 } |
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55 catch(boost::bad_get&) |
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56 { |
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57 throw; // must never reach |
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58 } |
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59 } |
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60 |
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61 template <typename T, typename Variant> |
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62 void check_fail(Variant& v) |
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63 { |
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64 BOOST_CHECK(!get<T>(&v)); |
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65 |
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66 try |
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67 { |
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68 T& r = get<T>(v); |
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69 BOOST_CHECK(false && &r); // should never reach |
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70 } |
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71 catch(boost::bad_get&) |
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72 { |
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73 // (do nothing here) |
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74 } |
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75 } |
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76 |
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77 int test_main(int , char* []) |
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78 { |
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79 int_sum acc; |
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80 t_var1 v1 = 800; |
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81 std_log(LOG_FILENAME_LINE,"[Test Case for test8]"); |
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82 // check get on non-const variant |
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83 { |
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84 int& r1 = check_pass<int>(v1, 800); |
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85 const int& cr1 = check_pass<const int>(v1, 800); |
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86 |
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87 check_fail<float>(v1); |
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88 check_fail<const float>(v1); |
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89 check_fail<short>(v1); |
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90 check_fail<const short>(v1); |
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91 |
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92 apply_visitor(acc, v1); |
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93 BOOST_CHECK(acc.result_ == 800); |
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94 |
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95 r1 = 920; // NOTE: modifies content of v1 |
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96 apply_visitor(acc, v1); |
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97 BOOST_CHECK(cr1 == 920); |
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98 BOOST_CHECK(acc.result_ == 800 + 920); |
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99 } |
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100 |
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101 // check const correctness: |
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102 { |
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103 const t_var1& c = v1; |
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104 |
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105 check_pass<const int>(c, 920); |
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106 |
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107 //check_fail<int>(c); |
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108 check_fail<const float>(c); |
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109 //check_fail<float>(c); |
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110 check_fail<const short>(c); |
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111 //check_fail<short>(c); |
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112 } |
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113 #ifdef __SYMBIAN32__ |
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114 testResultXml("test8"); |
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115 close_log_file(); |
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116 #endif |
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117 return boost::exit_success; |
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118 } |