C# Binder.WithAdditionalFlagsAndContainingMemberOrLambda方法代碼示例

        private void MethodChecks(MethodDeclarationSyntax syntax, Binder withTypeParamsBinder, DiagnosticBag diagnostics)
        {
            SyntaxToken arglistToken;

            // Constraint checking for parameter and return types must be delayed until
            // the method has been added to the containing type member list since
            // evaluating the constraints may depend on accessing this method from
            // the container (comparing this method to others to find overrides for
            // instance). Constraints are checked in AfterAddingTypeMembersChecks.
            var signatureBinder = withTypeParamsBinder.WithAdditionalFlagsAndContainingMemberOrLambda(BinderFlags.SuppressConstraintChecks, this);

            _lazyParameters = ParameterHelpers.MakeParameters(signatureBinder, this, syntax.ParameterList, true, out arglistToken, diagnostics, false);
            _lazyIsVararg = (arglistToken.Kind() == SyntaxKind.ArgListKeyword);
            RefKind refKind;
            var returnTypeSyntax = syntax.ReturnType.SkipRef(out refKind);
            _lazyReturnType = signatureBinder.BindType(returnTypeSyntax, diagnostics);

            if (_lazyReturnType.IsRestrictedType())
            {
                if (_lazyReturnType.SpecialType == SpecialType.System_TypedReference &&
                    (this.ContainingType.SpecialType == SpecialType.System_TypedReference || this.ContainingType.SpecialType == SpecialType.System_ArgIterator))
                {
                    // Two special cases: methods in the special types TypedReference and ArgIterator are allowed to return TypedReference
                }
                else
                {
                    // Method or delegate cannot return type '{0}'
                    diagnostics.Add(ErrorCode.ERR_MethodReturnCantBeRefAny, syntax.ReturnType.Location, _lazyReturnType);
                }
            }

            var returnsVoid = _lazyReturnType.SpecialType == SpecialType.System_Void;
            if (this.RefKind != RefKind.None && returnsVoid)
            {
                Debug.Assert(returnTypeSyntax.HasErrors);
            }

            // set ReturnsVoid flag
            this.SetReturnsVoid(returnsVoid);

            var location = this.Locations[0];
            this.CheckEffectiveAccessibility(_lazyReturnType, _lazyParameters, diagnostics);

            // Checks taken from MemberDefiner::defineMethod
            if (this.Name == WellKnownMemberNames.DestructorName && this.ParameterCount == 0 && this.Arity == 0 && this.ReturnsVoid)
            {
                diagnostics.Add(ErrorCode.WRN_FinalizeMethod, location);
            }

            // errors relevant for extension methods
            if (IsExtensionMethod)
            {
                var parameter0Type = this.Parameters[0].Type;
                if (!parameter0Type.IsValidExtensionParameterType())
                {
                    // Duplicate Dev10 behavior by selecting the parameter type.
                    var parameterSyntax = syntax.ParameterList.Parameters[0];
                    Debug.Assert(parameterSyntax.Type != null);
                    var loc = parameterSyntax.Type.Location;
                    diagnostics.Add(ErrorCode.ERR_BadTypeforThis, loc, parameter0Type);
                }
                else if ((object)ContainingType.ContainingType != null)
                {
                    diagnostics.Add(ErrorCode.ERR_ExtensionMethodsDecl, location, ContainingType.Name);
                }
                else if (!ContainingType.IsScriptClass && !(ContainingType.IsStatic && ContainingType.Arity == 0))
                {
                    // Duplicate Dev10 behavior by selecting the containing type identifier. However if there
                    // is no containing type (in the interactive case for instance), select the method identifier.
                    var typeDecl = syntax.Parent as TypeDeclarationSyntax;
                    var identifier = (typeDecl != null) ? typeDecl.Identifier : syntax.Identifier;
                    var loc = identifier.GetLocation();
                    diagnostics.Add(ErrorCode.ERR_BadExtensionAgg, loc);
                }
                else if (!IsStatic)
                {
                    diagnostics.Add(ErrorCode.ERR_BadExtensionMeth, location);
                }
                else
                {
                    // Verify ExtensionAttribute is available.
                    var attributeConstructor = withTypeParamsBinder.Compilation.GetWellKnownTypeMember(WellKnownMember.System_Runtime_CompilerServices_ExtensionAttribute__ctor);
                    if ((object)attributeConstructor == null)
                    {
                        var memberDescriptor = WellKnownMembers.GetDescriptor(WellKnownMember.System_Runtime_CompilerServices_ExtensionAttribute__ctor);
                        // do not use Binder.ReportUseSiteErrorForAttributeCtor in this case, because we'll need to report a special error id, not a generic use site error.
                        diagnostics.Add(
                            ErrorCode.ERR_ExtensionAttrNotFound,
                            syntax.ParameterList.Parameters[0].Modifiers.FirstOrDefault(SyntaxKind.ThisKeyword).GetLocation(),
                            memberDescriptor.DeclaringTypeMetadataName);
                    }
                }
            }

            if (this.MethodKind == MethodKind.UserDefinedOperator)
            {
                foreach (var p in this.Parameters)
                {
                    if (p.RefKind != RefKind.None)
                    {
//.........這裏部分代碼省略.........

        // CONSIDER: if the parameters were computed lazily, ParameterCount could be overridden to fall back on the syntax (as in SourceMemberMethodSymbol).

        private SourcePropertySymbol(
            SourceMemberContainerTypeSymbol containingType,
            Binder bodyBinder,
            BasePropertyDeclarationSyntax syntax,
            string name,
            Location location,
            DiagnosticBag diagnostics)
        {
            // This has the value that IsIndexer will ultimately have, once we've populated the fields of this object.
            bool isIndexer = syntax.Kind() == SyntaxKind.IndexerDeclaration;
            var interfaceSpecifier = GetExplicitInterfaceSpecifier(syntax);
            bool isExplicitInterfaceImplementation = (interfaceSpecifier != null);

            _location = location;
            _containingType = containingType;
            _syntaxRef = syntax.GetReference();

            SyntaxTokenList modifiers = syntax.Modifiers;
            bodyBinder = bodyBinder.WithUnsafeRegionIfNecessary(modifiers);
            bodyBinder = bodyBinder.WithAdditionalFlagsAndContainingMemberOrLambda(BinderFlags.SuppressConstraintChecks, this);

            bool modifierErrors;
            _modifiers = MakeModifiers(modifiers, isExplicitInterfaceImplementation, isIndexer, location, diagnostics, out modifierErrors);
            this.CheckAccessibility(location, diagnostics);

            this.CheckModifiers(location, isIndexer, diagnostics);

            if (isIndexer && !isExplicitInterfaceImplementation)
            {
                // Evaluate the attributes immediately in case the IndexerNameAttribute has been applied.
                // NOTE: we want IsExplicitInterfaceImplementation, IsOverride, Locations, and the syntax reference
                // to be initialized before we pass this symbol to LoadCustomAttributes.

                // CONSIDER: none of the information from this early binding pass is cached.  Everything will
                // be re-bound when someone calls GetAttributes.  If this gets to be a problem, we could
                // always use the real attribute bag of this symbol and modify LoadAndValidateAttributes to
                // handle partially filled bags.
                CustomAttributesBag<CSharpAttributeData> temp = null;
                LoadAndValidateAttributes(OneOrMany.Create(this.CSharpSyntaxNode.AttributeLists), ref temp, earlyDecodingOnly: true);
                if (temp != null)
                {
                    Debug.Assert(temp.IsEarlyDecodedWellKnownAttributeDataComputed);
                    var propertyData = (PropertyEarlyWellKnownAttributeData)temp.EarlyDecodedWellKnownAttributeData;
                    if (propertyData != null)
                    {
                        _sourceName = propertyData.IndexerName;
                    }
                }
            }

            string aliasQualifierOpt;
            string memberName = ExplicitInterfaceHelpers.GetMemberNameAndInterfaceSymbol(bodyBinder, interfaceSpecifier, name, diagnostics, out _explicitInterfaceType, out aliasQualifierOpt);
            _sourceName = _sourceName ?? memberName; //sourceName may have been set while loading attributes
            _name = isIndexer ? ExplicitInterfaceHelpers.GetMemberName(WellKnownMemberNames.Indexer, _explicitInterfaceType, aliasQualifierOpt) : _sourceName;
            _isExpressionBodied = false;

            bool hasAccessorList = syntax.AccessorList != null;
            var propertySyntax = syntax as PropertyDeclarationSyntax;
            var arrowExpression = propertySyntax != null
                ? propertySyntax.ExpressionBody
                : ((IndexerDeclarationSyntax)syntax).ExpressionBody;
            bool hasExpressionBody = arrowExpression != null;
            bool hasInitializer = !isIndexer && propertySyntax.Initializer != null;

            bool notRegularProperty = (!IsAbstract && !IsExtern && !isIndexer && hasAccessorList);
            AccessorDeclarationSyntax getSyntax = null;
            AccessorDeclarationSyntax setSyntax = null;
            if (hasAccessorList)
            {
                foreach (var accessor in syntax.AccessorList.Accessors)
                {
                    if (accessor.Kind() == SyntaxKind.GetAccessorDeclaration &&
                        (getSyntax == null || getSyntax.Keyword.Span.IsEmpty))
                    {
                        getSyntax = accessor;
                    }
                    else if (accessor.Kind() == SyntaxKind.SetAccessorDeclaration &&
                        (setSyntax == null || setSyntax.Keyword.Span.IsEmpty))
                    {
                        setSyntax = accessor;
                    }
                    else
                    {
                        continue;
                    }

                    if (accessor.Body != null)
                    {
                        notRegularProperty = false;
                    }
                }
            }
            else
            {
                notRegularProperty = false;
            }

            if (hasInitializer)
//.........這裏部分代碼省略.........

        protected TypeSymbol BindEventType(Binder binder, TypeSyntax typeSyntax, DiagnosticBag diagnostics)
        {
            // NOTE: no point in reporting unsafe errors in the return type - anything unsafe will either
            // fail to be a delegate or will be (invalidly) passed as a type argument.
            // Prevent constraint checking.
            binder = binder.WithAdditionalFlagsAndContainingMemberOrLambda(BinderFlags.SuppressConstraintChecks | BinderFlags.SuppressUnsafeDiagnostics, this);

            return binder.BindType(typeSyntax, diagnostics);
        }