1 // Copyright David Abrahams 2003.
2 // Distributed under the Boost Software License, Version 1.0. (See
3 // accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5 
6 #include <boost/implicit_cast.hpp>
7 #include <boost/detail/lightweight_test.hpp>
8 #include <boost/type.hpp>
9 using boost::implicit_cast;
10 using boost::type;
11 
12 template <class T>
check_return(T)13 type<T> check_return(T) { return type<T>(); }
14 
15 struct foo
16 {
foofoo17     foo(char const*) {}
operator longfoo18     operator long() const { return 0; }
19 };
20 
21 typedef type<long> long_type;
22 typedef type<foo> foo_type;
23 
main()24 int main()
25 {
26     type<long> x = check_return(boost::implicit_cast<long>(1));
27     BOOST_TEST(boost::implicit_cast<long>(1) == 1L);
28 
29     type<foo> f = check_return(boost::implicit_cast<foo>("hello"));
30     type<long> z = check_return(boost::implicit_cast<long>(foo("hello")));
31 
32     // warning suppression:
33     (void)x;
34     (void)f;
35     (void)z;
36 
37     return boost::report_errors();
38 }
39