internal SyntaxTree?GetSyntaxTreeSynchronously(CancellationToken cancellationToken)
{
if (!this.SupportsSyntaxTree)
{
return(null);
}
return(DocumentState.GetSyntaxTree(cancellationToken));
}
internal SyntaxTree GetSyntaxTreeSynchronously(CancellationToken cancellationToken)
{
if (!this.SupportsSyntaxTree)
{
return(null);
}
// if we already have a stask for getting this syntax tree, and the task
// has completed, then we can just return that value.
var syntaxTreeTask = GetExistingSyntaxTreeTask();
if (syntaxTreeTask?.Status == TaskStatus.RanToCompletion)
{
return(syntaxTreeTask.Result);
}
// Otherwise defer to our state to get this value.
return(DocumentState.GetSyntaxTree(cancellationToken));
}