C# -> VB: Converting public static explicit operator failed

[nilesh-chauhan]

Input code

 public static explicit operator A2CMessage(XElement xe) { return XTypedServices.ToXTypedElement<A2CMessage>(xe, LinqToXsdTypeManager.Instance as ILinqToXsdTypeManager); }

Erroneous output

Error message:
CONVERSION ERROR: Conversion for ConversionOperatorDeclaration not implemented, please report this issue in 'public static explicit oper...' at character 27
   at ICSharpCode.CodeConverter.VB.NodesVisitor.DefaultVisit(SyntaxNode node)
   at ICSharpCode.CodeConverter.VB.NodesVisitor.VisitConversionOperatorDeclaration(ConversionOperatorDeclarationSyntax node)
   at Microsoft.CodeAnalysis.CSharp.Syntax.ConversionOperatorDeclarationSyntax.Accept[TResult](CSharpSyntaxVisitor`1 visitor)
   at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor`1.Visit(SyntaxNode node)
   at ICSharpCode.CodeConverter.VB.CommentConvertingNodesVisitor.DefaultVisit(SyntaxNode node)
   at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor`1.VisitConversionOperatorDeclaration(ConversionOperatorDeclarationSyntax node)
   at Microsoft.CodeAnalysis.CSharp.Syntax.ConversionOperatorDeclarationSyntax.Accept[TResult](CSharpSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.VB.NodesVisitor.<VisitClassDeclaration>b__23_0(MemberDeclarationSyntax m)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at ICSharpCode.CodeConverter.VB.NodesVisitor.VisitClassDeclaration(ClassDeclarationSyntax node)
   at Microsoft.CodeAnalysis.CSharp.Syntax.ClassDeclarationSyntax.Accept[TResult](CSharpSyntaxVisitor`1 visitor)
   at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor`1.Visit(SyntaxNode node)
   at ICSharpCode.CodeConverter.VB.CommentConvertingNodesVisitor.DefaultVisit(SyntaxNode node)
   at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor`1.VisitClassDeclaration(ClassDeclarationSyntax node)
   at Microsoft.CodeAnalysis.CSharp.Syntax.ClassDeclarationSyntax.Accept[TResult](CSharpSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.VB.NodesVisitor.<VisitCompilationUnit>b__15_1(MemberDeclarationSyntax m)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at Microsoft.CodeAnalysis.SyntaxList`1.CreateNode(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.SyntaxList`1..ctor(IEnumerable`1 nodes)
   at Microsoft.CodeAnalysis.VisualBasic.SyntaxFactory.List[TNode](IEnumerable`1 nodes)
   at ICSharpCode.CodeConverter.VB.NodesVisitor.VisitCompilationUnit(CompilationUnitSyntax node)
   at Microsoft.CodeAnalysis.CSharp.Syntax.CompilationUnitSyntax.Accept[TResult](CSharpSyntaxVisitor`1 visitor)
   at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor`1.Visit(SyntaxNode node)
   at ICSharpCode.CodeConverter.VB.CommentConvertingNodesVisitor.DefaultVisit(SyntaxNode node)
   at Microsoft.CodeAnalysis.CSharp.CSharpSyntaxVisitor`1.VisitCompilationUnit(CompilationUnitSyntax node)
   at Microsoft.CodeAnalysis.CSharp.Syntax.CompilationUnitSyntax.Accept[TResult](CSharpSyntaxVisitor`1 visitor)
   at ICSharpCode.CodeConverter.VB.CSharpConverter.ConvertCompilationTree(CSharpCompilation compilation, CSharpSyntaxTree tree)
   at ICSharpCode.CodeConverter.VB.CSToVBConversion.SingleFirstPass(Compilation sourceCompilation, SyntaxTree tree)
   at ICSharpCode.CodeConverter.Shared.ProjectConversion.SingleFirstPass(SyntaxTree tree, String treeFilePath)
   at ICSharpCode.CodeConverter.Shared.ProjectConversion.FirstPass()

Expected output

Public Overloads Shared Narrowing Operator CType(xe As XElement) As MsgHeaderLocalType
				Return XTypedServices.ToXTypedElement(Of MsgHeaderLocalType)(xe, TryCast(LinqToXsdTypeManager.Instance, ILinqToXsdTypeManager))
			End Operator

Details

While converting c# code to vb gives errors.

[GrahamTheCoder]

Thanks for the report. If anyone would like to implement conversion operators, you'll need to add the method mentioned in the callstack:
NodesVisitor.VisitConversionOperatorDeclaration. It can probably share a lot of code with a normal method. Though looking at the conversion in the other direction may also give some inspiration.

CodeConverter/CodeConverter/CSharp/DeclarationNodeVisitor.cs

Lines 1278 to 1281 in 083ccb0

	if (conversionModifiers.Any()) {
	return SyntaxFactory.ConversionOperatorDeclaration(attributeList, nonConversionModifiers,
	conversionModifiers.Single(), returnType, parameterList, body, null);
	}