Microsoft.CSharp.RuntimeBinder.Semantics.AggregateType.GetWinRTCollectionIfacesAll C# (CSharp) Method

        public TypeArray GetWinRTCollectionIfacesAll(SymbolLoader pSymbolLoader)
        {
            if (_winrtifacesAll == null)
            {
                TypeArray ifaces = GetIfacesAll();
                System.Collections.Generic.List<CType> typeList = new System.Collections.Generic.List<CType>();

                for (int i = 0; i < ifaces.size; i++)
                {
                    AggregateType type = ifaces.Item(i).AsAggregateType();
                    Debug.Assert(type.isInterfaceType());

                    if (type.IsCollectionType())
                    {
                        typeList.Add(type);
                    }
                }
                _winrtifacesAll = pSymbolLoader.getBSymmgr().AllocParams(typeList.Count, typeList.ToArray());
            }
            return _winrtifacesAll;
        }

        /***************************************************************************************************
        *   Lookup must be called before anything else can be called.
        *
        *   typeSrc - Must be an AggregateType or TypeParameterType.
        *   obj - the expression through which the member is being accessed. This is used for accessibility
        *       of protected members and for constructing a MEMGRP from the results of the lookup.
        *       It is legal for obj to be an EK_CLASS, in which case it may be used for accessibility, but
        *       will not be used for MEMGRP construction.
        *   symWhere - the symbol from with the name is being accessed (for checking accessibility).
        *   name - the name to look for.
        *   arity - the number of type args specified. Only members that support this arity are found.
        *       Note that when arity is zero, all methods are considered since we do type argument
        *       inferencing.
        *
        *   flags - See MemLookFlags.
        *       TypeVarsAllowed only applies to the most derived type (not base types).
        ***************************************************************************************************/
        public bool Lookup(CSemanticChecker checker, CType typeSrc, EXPR obj, ParentSymbol symWhere, Name name, int arity, MemLookFlags flags)
        {
            Debug.Assert((flags & ~MemLookFlags.All) == 0);
            Debug.Assert(obj == null || obj.type != null);
            Debug.Assert(typeSrc.IsAggregateType() || typeSrc.IsTypeParameterType());
            Debug.Assert(checker != null);

            _prgtype = _rgtypeStart;

            // Save the inputs for error handling, etc.
            _pSemanticChecker = checker;
            _pSymbolLoader    = checker.GetSymbolLoader();
            _typeSrc          = typeSrc;
            _obj      = (obj != null && !obj.isCLASS()) ? obj : null;
            _symWhere = symWhere;
            _name     = name;
            _arity    = arity;
            _flags    = flags;

            if ((_flags & MemLookFlags.BaseCall) != 0)
            {
                _typeQual = null;
            }
            else if ((_flags & MemLookFlags.Ctor) != 0)
            {
                _typeQual = _typeSrc;
            }
            else if (obj != null)
            {
                _typeQual = (CType)obj.type;
            }
            else
            {
                _typeQual = null;
            }

            // Determine what to search.
            AggregateType typeCls1  = null;
            AggregateType typeIface = null;
            TypeArray     ifaces    = BSYMMGR.EmptyTypeArray();
            AggregateType typeCls2  = null;

            if (typeSrc.IsTypeParameterType())
            {
                Debug.Assert((_flags & (MemLookFlags.Ctor | MemLookFlags.NewObj | MemLookFlags.Operator | MemLookFlags.BaseCall | MemLookFlags.TypeVarsAllowed)) == 0);
                _flags  &= ~MemLookFlags.TypeVarsAllowed;
                ifaces   = typeSrc.AsTypeParameterType().GetInterfaceBounds();
                typeCls1 = typeSrc.AsTypeParameterType().GetEffectiveBaseClass();
                if (ifaces.size > 0 && typeCls1.isPredefType(PredefinedType.PT_OBJECT))
                {
                    typeCls1 = null;
                }
            }
            else if (!typeSrc.isInterfaceType())
            {
                typeCls1 = typeSrc.AsAggregateType();

                if (typeCls1.IsWindowsRuntimeType())
                {
                    ifaces = typeCls1.GetWinRTCollectionIfacesAll(GetSymbolLoader());
                }
            }
            else
            {
                Debug.Assert(typeSrc.isInterfaceType());
                Debug.Assert((_flags & (MemLookFlags.Ctor | MemLookFlags.NewObj | MemLookFlags.Operator | MemLookFlags.BaseCall)) == 0);
                typeIface = typeSrc.AsAggregateType();
                ifaces    = typeIface.GetIfacesAll();
            }

            if (typeIface != null || ifaces.size > 0)
            {
                typeCls2 = GetSymbolLoader().GetReqPredefType(PredefinedType.PT_OBJECT);
            }

            // Search the class first (except possibly object).
            if (typeCls1 == null || LookupInClass(typeCls1, ref typeCls2))
            {
                // Search the interfaces.
                if ((typeIface != null || ifaces.size > 0) && LookupInInterfaces(typeIface, ifaces) && typeCls2 != null)
                {
                    // Search object last.
                    Debug.Assert(typeCls2 != null && typeCls2.isPredefType(PredefinedType.PT_OBJECT));

                    AggregateType result = null;
                    LookupInClass(typeCls2, ref result);
                }
            }

            // if we are requested with extension methods
            _results = new CMemberLookupResults(GetAllTypes(), _name);

            return(!FError());
        }