private static async Task <Document> OverrideDisposeAsync(CodeFixContext context, ClassDeclarationSyntax classDeclaration, IMethodSymbol baseDispose, CancellationToken cancellationToken)
{
var editor = await DocumentEditor.CreateAsync(context.Document, cancellationToken)
.ConfigureAwait(false);
var type = (ITypeSymbol)editor.SemanticModel.GetDeclaredSymbol(classDeclaration, cancellationToken);
var usesUnderscoreNames = editor.SemanticModel.UnderscoreFields();
var field = editor.AddField(
classDeclaration,
usesUnderscoreNames
? "_disposed"
: "disposed",
Accessibility.Private,
DeclarationModifiers.None,
SyntaxFactory.ParseTypeName("bool"),
cancellationToken);
var code = StringBuilderPool.Borrow()
.AppendLine($"{baseDispose.DeclaredAccessibility.ToCodeString()} override void Dispose(bool disposing)")
.AppendLine("{")
.AppendLine(" if (this.disposed)")
.AppendLine(" {")
.AppendLine(" return;")
.AppendLine(" }")
.AppendLine()
.AppendLine(" this.disposed = true;")
.AppendLine(" if (disposing)")
.AppendLine(" {")
.AppendLine(" }")
.AppendLine()
.AppendLine(" base.Dispose(disposing);")
.AppendLine("}")
.Return();
_ = editor.AddMethod(
classDeclaration,
ParseMethod(code, usesUnderscoreNames, field));
if (!type.GetMembers().TryFirst(x => x.Name == "ThrowIfDisposed", out _))
{
if (type.BaseType.TryFindSingleMethodRecursive("ThrowIfDisposed", out var baseThrow) &&
baseThrow.Parameters.Length == 0)
{
if (baseThrow.IsVirtual)
{
code = StringBuilderPool.Borrow()
.AppendLine($"{baseThrow.DeclaredAccessibility.ToCodeString()} override void ThrowIfDisposed()")
.AppendLine("{")
.AppendLine(" if (this.disposed)")
.AppendLine(" {")
.AppendLine(" throw new System.ObjectDisposedException(this.GetType().FullName);")
.AppendLine(" }")
.AppendLine()
.AppendLine(" base.ThrowIfDisposed();")
.AppendLine("}")
.Return();
_ = editor.AddMethod(
classDeclaration,
ParseMethod(code, usesUnderscoreNames, field));
}
}
else
{
_ = editor.AddMethod(
classDeclaration,
ParseMethod(
@"protected virtual void ThrowIfDisposed()
{
if (this.disposed)
{
throw new System.ObjectDisposedException(this.GetType().FullName);
}
}",
usesUnderscoreNames,
field));
}
}
return(editor.GetChangedDocument());
}
