Using TypeOf Expressions with TypeListSyntax

Extensions.vb

' Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.

Imports System
Imports System.Runtime.CompilerServices
Imports System.Threading
Imports Microsoft.CodeAnalysis
Imports Microsoft.CodeAnalysis.VisualBasic
Imports Microsoft.CodeAnalysis.VisualBasic.Symbols
Imports Microsoft.CodeAnalysis.VisualBasic.Syntax

' This is deliberately declared in the global namespace so that it will always be discoverable (regardless of Imports).
Friend Module Extensions

    ''' <summary>
    ''' This method is provided as a convenience for testing the SemanticModel.GetDeclaredSymbol implementation.
    ''' </summary>
    ''' <param name="node">This parameter will be type checked, and a NotSupportedException will be thrown if the type is not currently supported by an overload of GetDeclaredSymbol.</param>
    <Extension()>
    Friend Function GetDeclaredSymbolFromSyntaxNode(model As SemanticModel, node As SyntaxNode, Optional cancellationToken As CancellationToken = Nothing) As Symbol
      If (Typeof node IsNot
           {AggregationRangeVariableSyntax, AnonymousObjectCreationExpressionSyntax, SimpleImportsClauseSyntax,
                      CatchStatementSyntax,           CollectionRangeVariableSyntax,           EnumBlockSyntax,
               EnumMemberDeclarationSyntax,                     EnumStatementSyntax,          EventBlockSyntax,
              xpressionRangeVariableSyntax,                  ForEachStatementSyntax,    FieldInitializerSyntax,
                        ForStatementSyntax,                    LabelStatementSyntax,          MethodBaseSyntax,
                         MethodBlockSyntax,                ModifiedIdentifierSyntax,      NamespaceBlockSyntax,
                  NamespaceStatementSyntax,                         ParameterSyntax,       PropertyBlockSyntax,
                   PropertyStatementSyntax,                         TypeBlockSyntax,       TypeParameterSyntax,
                       TypeStatementSyntax } ) _
        Then
            Throw New NotSupportedException("This node type is not supported.")
        End If

        Return DirectCast(model.GetDeclaredSymbol(node, cancellationToken), Symbol)
    End Function

End Module