public override VisualBasicSyntaxNode VisitAttributeTargetSpecifier(CSS.AttributeTargetSpecifierSyntax node)
            {
                SyntaxToken id;

                switch (node.Identifier.CSKind())
                {
                case CS.SyntaxKind.AssemblyKeyword:
                    id = SyntaxFactory.Token(SyntaxKind.AssemblyKeyword);
                    break;

                case CS.SyntaxKind.ReturnKeyword:
                    // not necessary, return attributes are moved by ConvertAndSplitAttributes.
                    return(null);

                default:
                    throw new NotSupportedException();
                }
                return(SyntaxFactory.AttributeTarget(id));
            }
Esempio n. 2
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        private static bool MatchAttributeTarget(IAttributeTargetSymbol attributeTarget, AttributeLocation symbolPart, AttributeTargetSpecifierSyntax targetOpt, DiagnosticBag diagnostics)
        {
            IAttributeTargetSymbol attributesOwner = attributeTarget.AttributesOwner;

            // Determine if the target symbol owns the attribute declaration. 
            // We need to report diagnostics only once, so do it when visiting attributes for the owner.
            bool isOwner = symbolPart == AttributeLocation.None && ReferenceEquals(attributesOwner, attributeTarget);

            if (targetOpt == null)
            {
                // only attributes with an explicit target match if the symbol doesn't own the attributes:
                return isOwner;
            }

            AttributeLocation explicitTarget = targetOpt.GetAttributeLocation();
            if (explicitTarget == AttributeLocation.None)
            {
                // error: unknown attribute location
                if (isOwner)
                {
                    //NOTE: ValueText so that we accept targets like "@return", to match dev10 (DevDiv #2591).
                    diagnostics.Add(ErrorCode.WRN_InvalidAttributeLocation,
                        targetOpt.Identifier.GetLocation(), targetOpt.Identifier.ValueText);
                }

                return false;
            }

            AttributeLocation allowedTargets = attributesOwner.AllowedAttributeLocations;
            if ((explicitTarget & allowedTargets) == 0)
            {
                // error: invalid target for symbol
                if (isOwner)
                {
                    if (allowedTargets == AttributeLocation.None)
                    {
                        switch (attributeTarget.DefaultAttributeLocation)
                        {
                            case AttributeLocation.Assembly:
                            case AttributeLocation.Module:
                                // global attributes are disallowed in interactive code:
                                diagnostics.Add(ErrorCode.ERR_GlobalAttributesNotAllowed, targetOpt.Identifier.GetLocation());
                                break;

                            default:
                                // currently this can't happen
                                throw ExceptionUtilities.UnexpectedValue(attributeTarget.DefaultAttributeLocation);
                        }
                    }
                    else
                    {
                        diagnostics.Add(ErrorCode.WRN_AttributeLocationOnBadDeclaration,
                            targetOpt.Identifier.GetLocation(), targetOpt.Identifier.ToString(), allowedTargets.ToDisplayString());
                    }
                }

                return false;
            }

            if (symbolPart == AttributeLocation.None)
            {
                return explicitTarget == attributeTarget.DefaultAttributeLocation;
            }
            else
            {
                return explicitTarget == symbolPart;
            }
        }
            private IEnumerable<ITypeSymbol> InferTypeInAttributeTargetSpecifier(
                AttributeTargetSpecifierSyntax attributeTargetSpecifier,
                SyntaxToken? previousToken)
            {
                // If we have a position, then it has to be after the colon.
                if (previousToken.HasValue && previousToken.Value != attributeTargetSpecifier.ColonToken)
                {
                    return SpecializedCollections.EmptyEnumerable<ITypeSymbol>();
                }

                return SpecializedCollections.SingletonEnumerable(this.Compilation.AttributeType());
            }
 /// <summary>
 /// 
 /// </summary>
 /// <param name="node"></param>
 public override sealed void VisitAttributeTargetSpecifier(AttributeTargetSpecifierSyntax node)
 {
     this.OnNodeVisited(node, this.type.IsInstanceOfType(node));
     base.VisitAttributeTargetSpecifier(node);
 }
 /// <summary>
 /// 
 /// </summary>
 /// <param name="node"></param>
 public override sealed void VisitAttributeTargetSpecifier(AttributeTargetSpecifierSyntax node)
 {
     this.OnNodeVisited(node);
     if (!this.traverseRootOnly) base.VisitAttributeTargetSpecifier(node);
 }