Mono.CSharp.InterfaceMemberBase.CheckBase C# (CSharp) Method

		protected override bool CheckBase ()
		{
			if (!base.CheckBase ())
				return false;

			if ((caching_flags & Flags.MethodOverloadsExist) != 0)
				CheckForDuplications ();
			
			if (IsExplicitImpl)
				return true;

			// For System.Object only
			if (Parent.BaseType == null)
				return true;

			MemberSpec candidate;
			var base_member = FindBaseMember (out candidate);

			if ((ModFlags & Modifiers.OVERRIDE) != 0) {
				if (base_member == null) {
					if (candidate == null) {
						if (this is Method && ((Method)this).ParameterInfo.IsEmpty && MemberName.Name == Destructor.MetadataName && MemberName.Arity == 0) {
							Report.Error (249, Location, "Do not override `{0}'. Use destructor syntax instead",
								"object.Finalize()");
						} else {
							Report.Error (115, Location, "`{0}' is marked as an override but no suitable {1} found to override",
								GetSignatureForError (), SimpleName.GetMemberType (this));
						}
					} else {
						Report.SymbolRelatedToPreviousError (candidate);
						if (this is Event)
							Report.Error (72, Location, "`{0}': cannot override because `{1}' is not an event",
								GetSignatureForError (), TypeManager.GetFullNameSignature (candidate));
						else if (this is PropertyBase)
							Report.Error (544, Location, "`{0}': cannot override because `{1}' is not a property",
								GetSignatureForError (), TypeManager.GetFullNameSignature (candidate));
						else
							Report.Error (505, Location, "`{0}': cannot override because `{1}' is not a method",
								GetSignatureForError (), TypeManager.GetFullNameSignature (candidate));
					}

					return false;
				}

				if (!CheckOverrideAgainstBase (base_member))
					return false;

				ObsoleteAttribute oa = base_member.GetAttributeObsolete ();
				if (oa != null) {
					if (OptAttributes == null || !OptAttributes.Contains (Module.PredefinedAttributes.Obsolete)) {
						Report.SymbolRelatedToPreviousError (base_member);
						Report.Warning (672, 1, Location, "Member `{0}' overrides obsolete member `{1}'. Add the Obsolete attribute to `{0}'",
							GetSignatureForError (), TypeManager.GetFullNameSignature (base_member));
					}
				} else {
					if (OptAttributes != null && OptAttributes.Contains (Module.PredefinedAttributes.Obsolete)) {
						Report.SymbolRelatedToPreviousError (base_member);
						Report.Warning (809, 1, Location, "Obsolete member `{0}' overrides non-obsolete member `{1}'",
							GetSignatureForError (), TypeManager.GetFullNameSignature (base_member));
					}
				}

				base_method = base_member as MethodSpec;
				return true;
			}

			if (base_member == null && candidate != null && (!(candidate is IParametersMember) || !(this is IParametersMember)))
				base_member = candidate;

			if (base_member == null) {
				if ((ModFlags & Modifiers.NEW) != 0) {
					if (base_member == null) {
						Report.Warning (109, 4, Location, "The member `{0}' does not hide an inherited member. The new keyword is not required",
							GetSignatureForError ());
					}
				}
			} else {
				if ((ModFlags & Modifiers.NEW) == 0) {
					ModFlags |= Modifiers.NEW;
					if (!IsCompilerGenerated) {
						Report.SymbolRelatedToPreviousError (base_member);
						if (!IsInterface && (base_member.Modifiers & (Modifiers.ABSTRACT | Modifiers.VIRTUAL | Modifiers.OVERRIDE)) != 0) {
							Report.Warning (114, 2, Location, "`{0}' hides inherited member `{1}'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword",
								GetSignatureForError (), base_member.GetSignatureForError ());
						} else {
							Report.Warning (108, 2, Location, "`{0}' hides inherited member `{1}'. Use the new keyword if hiding was intended",
								GetSignatureForError (), base_member.GetSignatureForError ());
						}
					}
				}

				if (!IsInterface && base_member.IsAbstract && candidate == null) {
					Report.SymbolRelatedToPreviousError (base_member);
					Report.Error (533, Location, "`{0}' hides inherited abstract member `{1}'",
						GetSignatureForError (), base_member.GetSignatureForError ());
				}
			}

			return true;
		}