1// Boost.TypeErasure library
2//
3// Copyright 2011 Steven Watanabe
4//
5// Distributed under the Boost Software License Version 1.0. (See
6// accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt)
8//
9// $Id$
10
11#include <boost/type_erasure/any.hpp>
12#include <boost/type_erasure/builtin.hpp>
13#include <boost/type_erasure/operators.hpp>
14#include <boost/type_erasure/any_cast.hpp>
15#include <boost/mpl/vector.hpp>
16
17#define BOOST_TEST_MAIN
18#include <boost/test/unit_test.hpp>
19
20using namespace boost::type_erasure;
21
22template<class T = _self>
23struct common : ::boost::mpl::vector<
24 copy_constructible<T>,
25 typeid_<T>
26> {};
27
28typedef any<boost::mpl::vector<common<> > > any1_type;
29
30struct test_class
31{
32 int i;
33};
34
35test_class operator+(const test_class& lhs, const any1_type& rhs)
36{
37 test_class result = { .i: lhs.i + any_cast<int>(arg: rhs) };
38 return result;
39}
40
41BOOST_AUTO_TEST_CASE(test_basic)
42{
43 typedef boost::mpl::vector<common<>, addable<_self, any1_type> > test_concept;
44 any1_type a1(1);
45 test_class v = { .i: 2 };
46 any<test_concept> x(v);
47 any<test_concept> y(x + a1);
48 BOOST_CHECK_EQUAL(any_cast<test_class>(y).i, 3);
49}
50
51BOOST_AUTO_TEST_CASE(test_relaxed)
52{
53 typedef boost::mpl::vector<common<_a>, addable<_a, any1_type>, relaxed> test_concept;
54 typedef boost::mpl::vector<common<_b>, addable<_b, any1_type>, relaxed> dest_concept;
55 any1_type a1(1);
56 test_class v = { .i: 2 };
57 any<test_concept, _a> x(v);
58 any<test_concept, _a> y(x + a1);
59 BOOST_CHECK_EQUAL(any_cast<test_class>(y).i, 3);
60
61 any<dest_concept, _b> z(x);
62}
63

source code of boost/libs/type_erasure/test/test_nested.cpp