//  Microsoft Windows
//  Copyright (c) Microsoft Corporation. All rights reserved.

cpp_quote("//  Microsoft Windows")
cpp_quote("//  Copyright (c) Microsoft Corporation. All rights reserved.")
cpp_quote("#pragma once")

#ifndef DO_NO_IMPORTS
import "inspectable.idl";
#endif

[
    object,
    uuid(00000037-0000-0000-C000-000000000046),
    pointer_default(unique)
]
interface IWeakReference: IUnknown
{    
cpp_quote("#if (_MSC_VER >= 1600) && defined(__cplusplus) && !defined(CINTERFACE)")
cpp_quote("    EXTERN_C const IID IID_IWeakReference;")
cpp_quote("    extern \"C++\"")
cpp_quote("    {")
cpp_quote("        MIDL_INTERFACE(\"00000037-0000-0000-C000-000000000046\")")
cpp_quote("        IWeakReference : public IUnknown")
cpp_quote("        {")
cpp_quote("        public:")
cpp_quote("            virtual HRESULT STDMETHODCALLTYPE Resolve( ")
cpp_quote("                /* [in] */ __RPC__in REFIID riid,")
cpp_quote("                /* [iid_is][out] */ __RPC__deref_out IInspectable **objectReference) = 0;")
cpp_quote("")
cpp_quote("            template <typename T>")
cpp_quote("            _At_(*objectReference, _When_(FAILED(return), _Null_))")
cpp_quote("            _At_(*objectReference, _When_(SUCCEEDED(return), _Maybenull_))")
cpp_quote("            HRESULT Resolve(_Out_ T** objectReference)")
cpp_quote("            {")
cpp_quote("                static_assert(__is_base_of(IInspectable, T), \"Only Windows Runtime interfaces can be resolved by weak reference\");")
cpp_quote("                return Resolve(__uuidof(T), (IInspectable**)objectReference);")
cpp_quote("            }")
cpp_quote("        };")
cpp_quote("    } // extern C++")
cpp_quote("#else")

   HRESULT Resolve([in] REFIID riid, 
                   [out, retval, iid_is(riid)] IInspectable **objectReference);
}
cpp_quote("#endif")

[
    object,
    uuid(00000038-0000-0000-C000-000000000046),
    pointer_default(unique)
]
interface IWeakReferenceSource : IUnknown
{    
    HRESULT GetWeakReference([out, retval] IWeakReference **weakReference);
}