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- //
- // Boost.Pointer Container
- //
- // Copyright Thorsten Ottosen 2003-2005. Use, modification and
- // distribution is subject to 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)
- //
- // For more information, see http://www.boost.org/libs/ptr_container/
- //
- #include <boost/ptr_container/ptr_vector.hpp>
- #include <boost/shared_ptr.hpp>
- #include <boost/lambda/lambda.hpp>
- #include <algorithm>
- using namespace std;
-
- //
- // A simple polymorphic class
- //
- class Poly
- {
- int i_;
- static int cnt_;
-
- public:
- Poly() : i_( cnt_++ ) { }
- virtual ~Poly() { }
- void foo() { doFoo(); }
-
- private:
- virtual void doFoo() { ++i_; }
-
- public:
- friend inline bool operator>( const Poly& l, const Poly r )
- {
- return l.i_ > r.i_;
- }
- };
- int Poly::cnt_ = 0;
- //
- // Normally we need something like this to compare pointers to objects
- //
- template< typename T >
- struct sptr_greater
- {
- bool operator()( const boost::shared_ptr<T>& l, const boost::shared_ptr<T>& r ) const
- {
- return *l > *r;
- }
- };
-
- //
- // one doesn't need to introduce new names or live with long ones
- //
- typedef boost::shared_ptr<Poly> PolyPtr;
- void simple_test()
- {
- enum { size = 2000 };
- typedef vector<PolyPtr> vector_t;
- typedef boost::ptr_vector<Poly> ptr_vector_t;
- vector_t svec;
- ptr_vector_t pvec;
-
- for( int i = 0; i < size; ++i )
- {
- svec.push_back( PolyPtr( new Poly ) );
- pvec.push_back( new Poly ); // no extra syntax
- }
-
- for( int i = 0; i < size; ++i )
- {
- svec[i]->foo();
- pvec[i].foo(); // automatic indirection
- svec[i] = PolyPtr( new Poly );
- pvec.replace( i, new Poly ); // direct pointer assignment not possible, original element is deleted
- }
-
- for( vector_t::iterator i = svec.begin(); i != svec.end(); ++i )
- (*i)->foo();
-
- for( ptr_vector_t::iterator i = pvec.begin(); i != pvec.end(); ++i )
- i->foo(); // automatic indirection
- }
-
- #include <boost/test/unit_test.hpp>
- using boost::unit_test::test_suite;
- test_suite* init_unit_test_suite( int argc, char* argv[] )
- {
- test_suite* test = BOOST_TEST_SUITE( "Pointer Container Test Suite" );
- test->add( BOOST_TEST_CASE( &simple_test ) );
- return test;
- }
-
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