public static List <QualifiedTypeName> GetQualifiedTypeNames(SyntaxNode node)
{
var me = new TypeNameWalker();
me.Visit(node);
return(me.m_TypeNames);
}
public static async Task <Document> GenerateWithExtension(Document document, ClassDeclarationSyntax classDeclaration, CancellationToken cancellationToken)
{
var classInfos = TypeNameWalker.GetQualifiedTypeNames(await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false));
var constructors = classDeclaration
.Members
.OfType <ConstructorDeclarationSyntax>()
.ToImmutableArray();
if (!constructors.Any())
{
return(document);
}
var constructor = constructors
.MaxBy(c => c.ParameterList.Parameters.Count)
.First();
var originalClassName = classDeclaration.Name();
var classInfo = classInfos.First(c => c.Name == originalClassName);
var fullClassName = classInfo.QualifiedName(".");
var extensionClassName = $"{classInfo.QualifiedName("")}WithExtension";
var extensionClass = SyntaxFactory
.ClassDeclaration(extensionClassName)
.Public()
.Static()
.AddMembers(
SyntaxFactory.MethodDeclaration(Types.String, "With")
.Public()
.Static()
.WithReturnType(SyntaxFactory.ParseTypeName(fullClassName))
.WithParameterList(ToWithParameters(fullClassName, classDeclaration, constructor.ParameterList))
.WithExpressionBody(Call(fullClassName, classDeclaration, constructor.ParameterList))
).NormalizeWhitespace();
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var updated = root.AddOrUpdateClass(extensionClassName, c => extensionClass, c => extensionClass);
var updatedDoc = document.WithSyntaxRoot(updated);
updatedDoc = await Formatter.FormatAsync(updatedDoc, cancellationToken : cancellationToken);
return(updatedDoc);
}