static DisplayPart[] CreateDisplayParts(string debuggerDisplayString)
{
var list = ListCache <DisplayPart> .AllocList();
var sb = ObjectCache.AllocStringBuilder();
int pos = 0;
for (;;)
{
sb.Clear();
var text = ReadText(debuggerDisplayString, ref pos, sb);
if (text.Length != 0)
{
list.Add(DisplayPart.CreateText(text));
}
sb.Clear();
var evalInfo = ReadEvalText(debuggerDisplayString, ref pos, sb);
if (evalInfo.expression.Length != 0)
{
list.Add(DisplayPart.CreateEvaluate(evalInfo.expression, evalInfo.formatSpecifiers));
}
if (pos >= debuggerDisplayString.Length)
{
break;
}
}
ObjectCache.Free(ref sb);
return(ListCache <DisplayPart> .FreeAndToArray(ref list));
}
public static (string expression, string[] formatSpecifiers) GetFormatSpecifiers(StringBuilder sb)
{
int pos = sb.Length - 1;
if (pos < 0)
{
return(string.Empty, Array.Empty <string>());
}
int lastComma = sb.Length;
var list = ListCache <string> .AllocList();
for (;;)
{
var commaPos = ReverseIndexOf(sb, ',', pos);
if (commaPos < 0)
{
break;
}
var fs = sb.ToString(commaPos + 1, lastComma - (commaPos + 1)).Trim();
if (!IsFormatSpecifier(fs))
{
break;
}
list.Add(fs);
lastComma = commaPos;
pos = commaPos - 1;
}
var expression = sb.ToString(0, lastComma);
list.Reverse();
var formatSpecifiers = ListCache <string> .FreeAndToArray(ref list);
return(expression, formatSpecifiers);
}