1 //-----------------------------------------------------------------------------
2 // boost-libs variant/test/test5.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/core/lightweight_test.hpp"
14 #include "boost/variant.hpp"
15
16 #include "jobs.h"
17
18 #include <assert.h>
19 #include <iostream>
20 #include <string>
21 #include <vector>
22
23
run()24 void run()
25 {
26 using std::string;
27 using boost::variant;
28 using boost::apply_visitor;
29
30 typedef variant<int, float, unsigned short, unsigned char> t_var1;
31 typedef variant<int, t_var1, unsigned short, unsigned char> t_var2;
32 typedef variant<string, int, t_var2> t_var3;
33
34 t_var1 v1;
35 t_var2 v2;
36 t_var2 v2_second;
37 t_var3 v3;
38
39 const char c0 = 'x';
40 v1 = c0;
41
42 //v2 and v3 are holding (aka: containing) a variant
43 v2 = v1;
44 v3 = v2;
45
46 verify(v1, spec<int>());
47 verify(v2, spec<t_var1>());
48 verify(v3, spec<t_var2>());
49
50
51 //
52 // assignment from const char (Converted to int)
53 //
54 v2 = c0;
55 v3 = c0;
56
57 verify(v2, spec<int>());
58 verify(v3, spec<int>());
59
60
61 BOOST_TEST(apply_visitor(sum_int(), v2) == c0);
62 BOOST_TEST(apply_visitor(sum_int(), v3) == c0);
63
64 sum_int adder;
65 apply_visitor(adder, v2);
66 apply_visitor(adder, v3);
67
68 BOOST_TEST(adder.result() == 2*c0);
69
70 //
71 // A variant holding a variant
72 //
73 typedef variant<unsigned char, float> t_var4;
74 typedef variant<string, t_var4> t_var5;
75
76 t_var4 v4;
77 t_var5 v5;
78
79 v5 = 22.5f;
80 verify(v5, spec<t_var4>(), "[V] [V] 22.5");
81 }
82
83
84
main()85 int main()
86 {
87 run();
88 return boost::report_errors();
89 }
90
91