/// <summary>
/// Evaluates the expression by calculating the value
/// of the layout in the specified evaluation context.
/// </summary>
/// <param name="context">Evaluation context.</param>
/// <returns>The value of the layout.</returns>
protected override object EvaluateNode(LogEventInfo context)
{
if (_simpleLayout.IsSimpleStringText || !_simpleLayout.ThreadAgnostic)
{
return(_simpleLayout.Render(context));
}
var stringBuilder = System.Threading.Interlocked.Exchange(ref _fastObjectPool, null) ?? new StringBuilder();
try
{
_simpleLayout.RenderAppendBuilder(context, stringBuilder);
return(stringBuilder.ToString());
}
finally
{
stringBuilder.Length = 0;
System.Threading.Interlocked.Exchange(ref _fastObjectPool, stringBuilder);
}
}