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- // Copyright David Abrahams and Aleksey Gurtovoy
- // 2002-2004. Distributed under the Boost Software License, Version
- // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // run-time test for "boost/ref.hpp" header content
- // see 'ref_ct_test.cpp' for compile-time part
- #include <boost/ref.hpp>
- #include <boost/detail/lightweight_test.hpp>
- namespace {
- using namespace boost;
- template <class T>
- struct ref_wrapper
- {
- // Used to verify implicit conversion
- static T* get_pointer(T& x)
- {
- return &x;
- }
- static T const* get_const_pointer(T const& x)
- {
- return &x;
- }
- template <class Arg>
- static T* passthru(Arg x)
- {
- return get_pointer(x);
- }
- template <class Arg>
- static T const* cref_passthru(Arg x)
- {
- return get_const_pointer(x);
- }
- static void test(T x)
- {
- BOOST_TEST(passthru(ref(x)) == &x);
- BOOST_TEST(&ref(x).get() == &x);
- BOOST_TEST(cref_passthru(cref(x)) == &x);
- BOOST_TEST(&cref(x).get() == &x);
- }
- };
- struct copy_counter {
- static int count_;
- copy_counter(copy_counter const& /*other*/) {
- ++count_;
- }
- copy_counter() {}
- static void reset() { count_ = 0; }
- static int count() { return copy_counter::count_; }
- };
- int copy_counter::count_ = 0;
- } // namespace unnamed
- template <class T>
- void do_unwrap(T t) {
- /* typename unwrap_reference<T>::type& lt = */
- unwrap_ref(t);
- }
- void unwrap_test() {
- int i = 3;
- const int ci = 2;
- do_unwrap(i);
- do_unwrap(ci);
- do_unwrap(ref(i));
- do_unwrap(cref(ci));
- do_unwrap(ref(ci));
- copy_counter cc;
- BOOST_TEST(cc.count() == 0);
- do_unwrap(cc);
- do_unwrap(ref(cc));
- do_unwrap(cref(cc));
- BOOST_TEST(cc.count() == 1);
- BOOST_TEST(unwrap_ref(ref(cc)).count() == 1);
- }
- int main()
- {
- ref_wrapper<int>::test(1);
- ref_wrapper<int const>::test(1);
- unwrap_test();
- return boost::report_errors();
- }
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