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#pragma once
#include "../utils/typeTraits.hpp"
// Unlike ATL, the interface map is optional for ComLight.
// If you won't declare a map, the object will support 2 interfaces: IUnknown, and whatever template argument was passed to ObjectRoot class.
#define BEGIN_COM_MAP() \
protected: \
bool implQueryInterface( REFIID iid, void** ppvObject ) {
#define END_COM_MAP() return false; }
namespace ComLight
{
namespace details
{
template<typename I, typename C>
inline bool tryReturnInterface( REFIID iid, C* pThis, void** ppvResult )
{
static_assert( pointersAssignable<IUnknown, I>(), "Trying to implement an interface that doesn't derive from IUnknown" );
static_assert( pointersAssignable<I, C>(), "Declared support for an interface, but the class doesn't implement it" );
if( I::iid() != iid )
return false;
I* const result = pThis;
result->AddRef();
*ppvResult = result;
return true;
}
}
}
#define COM_INTERFACE_ENTRY( I ) if( ComLight::details::tryReturnInterface<I>( iid, this, ppvObject ) ) return true;
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