public static ImmutableArray <ExpressionSyntax> GetExpressionsAndFree(ReturnTaskInsteadOfNullWalker walker)
{
List <ExpressionSyntax> expressions = walker.Expressions;
Free(walker);
return((expressions == null)
? ImmutableArray <ExpressionSyntax> .Empty
: ImmutableArray.CreateRange(expressions));
}
public static ReturnTaskInsteadOfNullWalker GetInstance()
{
ReturnTaskInsteadOfNullWalker walker = _cachedInstance;
if (walker != null)
{
_cachedInstance = null;
walker.Clear();
return(walker);
}
return(new ReturnTaskInsteadOfNullWalker());
}
public static ReturnTaskInsteadOfNullWalker GetInstance()
{
ReturnTaskInsteadOfNullWalker walker = _cachedInstance;
if (walker != null)
{
Debug.Assert(walker.Expressions == null || walker.Expressions.Count == 0);
_cachedInstance = null;
return(walker);
}
return(new ReturnTaskInsteadOfNullWalker());
}
private static void AnalyzeBlock(SyntaxNodeAnalysisContext context, BlockSyntax body)
{
if (body == null)
{
return;
}
ReturnTaskInsteadOfNullWalker walker = ReturnTaskInsteadOfNullWalkerCache.GetInstance();
walker.VisitBlock(body);
foreach (ExpressionSyntax expression in ReturnTaskInsteadOfNullWalkerCache.GetExpressionsAndFree(walker))
{
ReportDiagnostic(context, expression);
}
}
public static void Free(ReturnTaskInsteadOfNullWalker walker)
{
_cachedInstance = walker;
}
public static void Free(ReturnTaskInsteadOfNullWalker walker)
{
walker.Expressions?.Clear();
_cachedInstance = walker;
}
