Loki/tools/RegressionTest/Test_SmartPtr.cpp

#include <vector>
#include <algorithm>
#include <cassert>
#include <Loki\SmartPtr.h>

#include <iostream>
using std::cout;
using std::endl;

#if defined(TEST_LOKI_ORIG)
namespace Loki
{
    template
    <
        typename T,
        template <class> class OwnershipPolicy = RefCounted,
        class ConversionPolicy = DisallowConversion,
        template <class> class CheckingPolicy = AssertCheck,
        template <class> class StoragePolicy = DefaultSPStorage
    >
    struct SmartPtrDef
    {
        typedef SmartPtr
        <
            T,
            OwnershipPolicy,
            ConversionPolicy,
            CheckingPolicy,
            StoragePolicy
        >
        type;
    };
} // namespace Loki
#endif // defined(TEST_LOKI_ORIG)

using namespace ::Loki;

namespace
{
	struct A 
	{ 
		A()          { ++s_instCount; }
		A(const A &) { ++s_instCount; }
		virtual ~A() { --s_instCount; } 
	    
		virtual const char *name() const = 0;

		static void AssertInstCount()
		{
			assert(s_instCount == 0);
		}

	private:
		static int s_instCount;
	};

	int A::s_instCount = 0;

	struct B : A 
	{
		virtual const char *name() const
		{
			return "B";
		}
	};

	struct C : A 
	{
		virtual const char *name() const
		{
			return "C";
		}
	};

	template<class SmartPtr_A>
	struct PrintA
	{
		void operator()(const SmartPtr_A &spA) const
		{
			std::cout << spA->name() << ", ";
		}
	};

	void Test_SmartPointer()
	{
		typedef SmartPtrDef<A, RefCounted>::type SmartPtr_A;
		typedef SmartPtrDef<B, RefCounted>::type SmartPtr_B;
		typedef SmartPtrDef<C, RefCounted>::type SmartPtr_C;

		SmartPtr_B     spB(new B);
		SmartPtr_C     spC(new C);

		SmartPtr_A     spA1(spB);
		SmartPtr_A     spA2(spC);

		std::cout << spA1->name() << std::endl;
		std::cout << spA2->name() << std::endl;

		spA1 = spA2;
		spA2 = spB;

		std::cout << spA1->name() << std::endl;
	    
		if (spA2 == spA1)
		{
			std::cout << spA2->name() << std::endl;
		}

		Reset(spA2, new C);
	    
		if (spA2)
		{
			std::cout << spA2->name() << std::endl;
		}

		std::vector<SmartPtr_A> vectorA;

		for (unsigned i = 0 ; i < 10 ; ++i)
		{
			if ((i % 3) == 0)
			{
					vectorA.push_back(new B);
			}
			else
			{
					vectorA.push_back(new C);
			}
		}
	    
		for (unsigned i = 0 ; i < 10 ; ++i)
		{
			vectorA.push_back(vectorA[i]);
		}

		std::for_each(vectorA.begin(), vectorA.end(), PrintA<SmartPtr_A>());

		std::cout << std::endl;
	}

	// I know it's ugly code duplication but the template version kills VC7
	void Test_SmartPtrRL()
	{
		typedef SmartPtrDef<A, RefLinked>::type SmartPtr_A;
		typedef SmartPtrDef<B, RefLinked>::type SmartPtr_B;
		typedef SmartPtrDef<C, RefLinked>::type SmartPtr_C;

		SmartPtr_B     spB(new B);
		SmartPtr_C     spC(new C);

		SmartPtr_A     spA1(spB);
		SmartPtr_A     spA2(spC);

		std::cout << spA1->name() << std::endl;
		std::cout << spA2->name() << std::endl;

		spA1 = spA2;
		spA2 = spB;

		std::cout << spA1->name() << std::endl;
	    
		if (spA2 == spA1)
		{
			std::cout << spA2->name() << std::endl;
		}

		Reset(spA2, new C);
	    
		if (spA2)
		{
			std::cout << spA2->name() << std::endl;
		}

		std::vector<SmartPtr_A> vectorA;

		for (unsigned i = 0 ; i < 10 ; ++i)
		{
			if ((i % 3) == 0)
			{
					vectorA.push_back(new B);
			}
			else
			{
					vectorA.push_back(new C);
			}
		}

		for (unsigned i = 0 ; i < 10 ; ++i)
		{
			vectorA.push_back(vectorA[i]);
		}

		std::for_each(vectorA.begin(), vectorA.end(), PrintA<SmartPtr_A>());

		std::cout << std::endl;
	}

	void Test_SmartPtrMT()
	{
	#define MyRefCountedMT RefCountedMTAdj<SingleThreaded>::RefCountedMT

		typedef SmartPtrDef<A, MyRefCountedMT>::type SmartPtr_A;
		typedef SmartPtrDef<B, MyRefCountedMT>::type SmartPtr_B;
		typedef SmartPtrDef<C, MyRefCountedMT>::type SmartPtr_C;

	#undef MyRefCountedMT

		SmartPtr_B     spB(new B);
		SmartPtr_C     spC(new C);

		SmartPtr_A     spA1(spB);
		SmartPtr_A     spA2(spC);

		std::cout << spA1->name() << std::endl;
		std::cout << spA2->name() << std::endl;

		spA1 = spA2;
		spA2 = spB;

		std::cout << spA1->name() << std::endl;
	    
		if (spA2 == spA1)
		{
			std::cout << spA2->name() << std::endl;
		}

		Reset(spA2, new C);
	    
		if (spA2)
		{
			std::cout << spA2->name() << std::endl;
		}

		std::vector<SmartPtr_A> vectorA;

		for (unsigned i = 0 ; i < 10 ; ++i)
		{
			if ((i % 3) == 0)
			{
					vectorA.push_back(new B);
			}
			else
			{
					vectorA.push_back(new C);
			}
		}

		for (unsigned i = 0 ; i < 10 ; ++i)
		{
			vectorA.push_back(vectorA[i]);
		}

		std::for_each(vectorA.begin(), vectorA.end(), PrintA<SmartPtr_A>());

		std::cout << std::endl;
	}

	void Test_RejectNull()
	{
		typedef SmartPtrDef<A, RefCounted, DisallowConversion, RejectNull>::type SmartPtr_A;

		try {
			SmartPtr_A     spA;
		} catch (std::exception &ex) {
			std::cout << "Reject Default: " << ex.what() << std::endl;
		}

		try {
			SmartPtr_A     spA(0);
		} catch (std::exception &ex) {
			std::cout << "Reject Null: " << ex.what() << std::endl;
		}
	}

}// anonymous namespace

extern void Test_SmartPtr()
{
	cout << "Testing Loki\\SmartPtr" << endl;
	Test_SmartPointer();
	Test_SmartPtrRL();
	Test_SmartPtrMT();
	Test_RejectNull();
	A::AssertInstCount();
	cout << endl << endl;
}