// // pointer_cast_test.cpp - a test for boost/pointer_cast.hpp // // Copyright (c) 2005 Ion Gaztanaga // Copyright (c) 2005 Peter Dimov // // 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) // #include #include #include #include #include #include namespace { // Let's create these inheritance relationship: // // base base2 // | | // derived // | // derived_derived // class base { public: virtual ~base(){} int filler [5]; }; class base2 { public: virtual ~base2(){} int filler [5]; }; class derived : public base, public base2 { int filler [5]; }; class derived_derived : public derived { int filler [5]; }; // And now some simple check functions #if !defined( BOOST_NO_RTTI ) template bool check_dynamic_pointer_cast(const BasePtr &ptr) { //Check that dynamic_pointer_cast versus dynamic_cast return //Correct cast with dynamic_pointer_cast boost::get_pointer(boost::dynamic_pointer_cast(ptr)) == //Correct cast with dynamic_cast dynamic_cast(boost::get_pointer(ptr)) && //Incorrect cast with dynamic_pointer_cast boost::get_pointer(boost::dynamic_pointer_cast(ptr)) == //Incorrect cast with dynamic_cast dynamic_cast(boost::get_pointer(ptr)); } #endif template bool check_static_pointer_cast(const BasePtr &ptr) { return //Cast base -> derived -> base2 using static_pointer_cast boost::get_pointer( boost::static_pointer_cast( boost::static_pointer_cast(ptr))) == //Now the same with static_cast static_cast(static_cast(boost::get_pointer(ptr))); } template bool check_const_pointer_cast(const BasePtr &ptr) { return //Unconst and const again using const_pointer_cast boost::get_pointer( boost::const_pointer_cast (boost::const_pointer_cast(ptr))) == //Now the same with const_cast const_cast(const_cast(boost::get_pointer(ptr))); } template void check_all_casts(const BasePtr &ptr) { #if !defined( BOOST_NO_RTTI ) BOOST_TEST( check_dynamic_pointer_cast( ptr ) ); #endif BOOST_TEST( check_static_pointer_cast( ptr ) ); BOOST_TEST( check_const_pointer_cast( ptr ) ); } } int main() { boost::shared_ptr boost_shared(new derived); base *plain = boost_shared.get(); check_all_casts(boost_shared); check_all_casts(plain); return boost::report_errors(); }