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Add polymorphic_pointer_cast

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This commit is contained in:
Antony Polukhin
2014-11-10 15:02:20 +04:00
parent 6199649ae2
commit 00b6a53f7e
3 changed files with 113 additions and 11 deletions
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83
test/polymorphic_cast_test.cpp
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@@ -1,10 +1,11 @@
//
// Test boost::polymorphic_cast, boost::polymorphic_downcast
// Test boost::polymorphic_cast, boost::polymorphic_downcast and
// boost::polymorphic_pointer_cast, boost::polymorphic_pointer_downcast
//
// Copyright 1999 Beman Dawes
// Copyright 1999 Dave Abrahams
// Copyright 2014 Peter Dimov
// Copyright 2014 Boris Rasin
// Copyright 2014 Boris Rasin, Antony Polukhin
//
// Distributed under the Boost Software License, Version 1.0.
//
@@ -103,6 +104,67 @@ static void test_polymorphic_cast()
delete base;
}
static void test_polymorphic_pointer_cast()
{
Base * base = new Derived;
Derived * derived;
try
{
derived = boost::polymorphic_pointer_cast<Derived>( base );
BOOST_TEST( derived != 0 );
if( derived != 0 )
{
BOOST_TEST_EQ( derived->kind(), "Derived" );
}
}
catch( std::bad_cast const& )
{
BOOST_ERROR( "boost::polymorphic_pointer_cast<Derived>( base ) threw std::bad_cast" );
}
Base2 * base2;
try
{
base2 = boost::polymorphic_pointer_cast<Base2>( base ); // crosscast
BOOST_TEST( base2 != 0 );
if( base2 != 0 )
{
BOOST_TEST_EQ( base2->kind2(), "Base2" );
}
}
catch( std::bad_cast const& )
{
BOOST_ERROR( "boost::polymorphic_pointer_cast<Base2>( base ) threw std::bad_cast" );
}
boost::shared_ptr<Base> sp_base( base );
boost::shared_ptr<Base2> sp_base2;
try
{
sp_base2 = boost::polymorphic_pointer_cast<Base2>( sp_base ); // crosscast
BOOST_TEST( sp_base2 != 0 );
if( sp_base2 != 0 )
{
BOOST_TEST_EQ( base2->kind2(), "Base2" );
}
}
catch( std::bad_cast const& )
{
BOOST_ERROR( "boost::polymorphic_pointer_cast<Base2>( sp_base ) threw std::bad_cast" );
}
// we do not `delete base;` because sahred_ptr is holding base
}
static void test_polymorphic_downcast()
{
Base * base = new Derived;
@@ -194,6 +256,21 @@ static void test_polymorphic_cast_fail()
delete base;
}
static void test_polymorphic_pointer_cast_fail()
{
Base * base = new Base;
BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( base ), std::bad_cast );
delete base;
BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( boost::shared_ptr<Base>(new Base) ), std::bad_cast );
#ifndef BOOST_NO_CXX11_SMART_PTR
BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( std::shared_ptr<Base>(new Base) ), std::bad_cast );
#endif
BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( boost::intrusive_ptr<Base>(new Base) ), std::bad_cast );
}
static void test_polymorphic_downcast_fail()
{
Base * base = new Base;
@@ -270,11 +347,13 @@ static void test_polymorphic_pointer_downcast_intrusive_fail()
int main()
{
test_polymorphic_cast();
test_polymorphic_pointer_cast();
test_polymorphic_downcast();
test_polymorphic_pointer_downcast_builtin();
test_polymorphic_pointer_downcast_boost_shared();
test_polymorphic_pointer_downcast_intrusive();
test_polymorphic_cast_fail();
test_polymorphic_pointer_cast_fail();
test_polymorphic_downcast_fail();
test_polymorphic_pointer_downcast_builtin_fail();
test_polymorphic_pointer_downcast_boost_shared_fail();