1 //-----------------------------------------------------------------------------
2 // boost-libs variant/test/test1.cpp header file
3 // See http://www.boost.org for updates, documentation, and revision history.
4 //-----------------------------------------------------------------------------
5 //
6 // Copyright (c) 2003
7 // Eric Friedman, Itay Maman
8 //
9 // Distributed under the Boost Software License, Version 1.0. (See
10 // accompanying file LICENSE_1_0.txt or copy at
11 // http://www.boost.org/LICENSE_1_0.txt)
12
13 #include "boost/config.hpp"
14
15 #ifdef BOOST_MSVC
16 #pragma warning(disable:4244) // conversion from const int to const short
17 #endif
18
19 #include "boost/core/lightweight_test.hpp"
20 #include "boost/variant.hpp"
21
22 #include "class_a.h"
23 #include "jobs.h"
24
25 #include <iostream>
26 #include <string>
27 #include <vector>
28
29
30
run()31 void run()
32 {
33
34 using boost::apply_visitor;
35 using boost::variant;
36 using std::string;
37 using std::vector;
38 using std::cout;
39 using std::endl;
40
41 typedef variant< char*, string, short > t_var0;
42 typedef variant< int, string, double > t_var1;
43 typedef variant< short, const char* > t_var2;
44 typedef variant< string, char > t_var3;
45 typedef variant< unsigned short, const char* > t_var4;
46 typedef variant< unsigned short, const char*, t_var2 > t_var5;
47 typedef variant< unsigned short, const char*, t_var5 > t_var6;
48 typedef variant< class_a, const void* > t_var7;
49 typedef variant< t_var6, int > t_var8;
50 typedef variant< t_var8, unsigned short > t_var9;
51 typedef variant< char, unsigned char > t_var10;
52 typedef variant< short, int, vector<int>, long> t_var11;
53
54 t_var1 v1;
55 t_var0 v0;
56 t_var2 v2;
57 t_var3 v3;
58 t_var4 v4;
59 t_var5 v5;
60 t_var6 v6;
61 t_var7 v7;
62 t_var8 v8;
63 t_var9 v9;
64 t_var10 v10;
65 t_var11 v11;
66
67
68 //
69 // Check assignment rules
70 //
71
72 v2 = 4;
73 v4 = v2;
74 verify(v4, spec<unsigned short>());
75
76 v2 = "abc";
77 v4 = v2;
78 verify(v4, spec<const char*>(), "[V] abc");
79
80 v5 = "def";
81 verify(v5, spec<const char*>(), "[V] def");
82
83 v5 = v2;
84 verify(v5, spec<t_var2>(), "[V] [V] abc");
85
86 v6 = 58;
87 verify(v6, spec<unsigned short>(), "[V] 58");
88
89 v6 = v5;
90 verify(v6, spec<t_var5>(), "[V] [V] [V] abc");
91
92 v8 = v2;
93 verify(v8, spec<t_var6>(), "[V] [V] abc");
94
95 v8 = v6;
96 verify(v8, spec<t_var6>(), "[V] [V] [V] [V] abc");
97
98 v7 = v2;
99 verify(v7, spec<const void*>());
100
101 v7 = 199;
102 verify(v7, spec<class_a>(), "[V] class_a(199)");
103
104 v2 = 200;
105 v7 = v2;
106 verify(v7, spec<class_a>(), "[V] class_a(200)");
107
108
109
110 //
111 // Check sizes of held values
112 //
113 total_sizeof ts;
114
115 v1 = 5.9;
116 apply_visitor(ts, v1);
117
118 v1 = 'B';
119 apply_visitor(ts, v1);
120
121 v1 = 3.4f;
122 apply_visitor(ts, v1);
123
124 BOOST_TEST(ts.result() == sizeof(int) + sizeof(double)*2);
125
126 v11 = 5;
127 string res_s = apply_visitor(int_printer(), v11);
128 BOOST_TEST(res_s == "5");
129
130 //
131 // A variant object holding an std::vector
132 //
133 vector<int> int_vec_1;
134 int_vec_1.push_back(512);
135 int_vec_1.push_back(256);
136 int_vec_1.push_back(128);
137 int_vec_1.push_back(64);
138
139 v11 = int_vec_1;
140 res_s = apply_visitor(int_printer(), v11);
141 BOOST_TEST(res_s == ",512,256,128,64");
142 }
143
144
145
main()146 int main()
147 {
148 run();
149 return boost::report_errors();
150 }
151