Microsoft.CSharp.RuntimeBinder.Semantics.CType.AsErrorType C# (CSharp) Méthode

        public ErrorType AsErrorType() { return this as ErrorType; }
        public ArrayType AsArrayType() { return this as ArrayType; }

        public static bool TypeContainsTyVars(CType type, TypeArray typeVars)
        {
        LRecurse:  // Label used for "tail" recursion.
            switch (type.GetTypeKind())
            {
                default:
                    Debug.Assert(false, "Bad Symbol kind in TypeContainsTyVars");
                    return false;

                case TypeKind.TK_UnboundLambdaType:
                case TypeKind.TK_BoundLambdaType:
                case TypeKind.TK_NullType:
                case TypeKind.TK_VoidType:
                case TypeKind.TK_OpenTypePlaceholderType:
                case TypeKind.TK_MethodGroupType:
                    return false;

                case TypeKind.TK_ArrayType:
                case TypeKind.TK_NullableType:
                case TypeKind.TK_ParameterModifierType:
                case TypeKind.TK_PointerType:
                    type = type.GetBaseOrParameterOrElementType();
                    goto LRecurse;

                case TypeKind.TK_AggregateType:
                    { // BLOCK
                        AggregateType ats = type.AsAggregateType();

                        for (int i = 0; i < ats.GetTypeArgsAll().Size; i++)
                        {
                            if (TypeContainsTyVars(ats.GetTypeArgsAll().Item(i), typeVars))
                            {
                                return true;
                            }
                        }
                    }
                    return false;

                case TypeKind.TK_ErrorType:
                    if (type.AsErrorType().HasParent())
                    {
                        ErrorType err = type.AsErrorType();
                        Debug.Assert(err.nameText != null && err.typeArgs != null);

                        for (int i = 0; i < err.typeArgs.Size; i++)
                        {
                            if (TypeContainsTyVars(err.typeArgs.Item(i), typeVars))
                            {
                                return true;
                            }
                        }
                        if (err.HasTypeParent())
                        {
                            type = err.GetTypeParent();
                            goto LRecurse;
                        }
                    }
                    return false;

                case TypeKind.TK_TypeParameterType:
                    if (typeVars != null && typeVars.Size > 0)
                    {
                        int ivar = type.AsTypeParameterType().GetIndexInTotalParameters();
                        return ivar < typeVars.Size && type == typeVars.Item(ivar);
                    }
                    return true;
            }
        }