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