static bool TrySplitTagContent(string tagContent, out string propertyNameAndDestructuring, out string format, out string alignment, out MessageTemplateDiagnostic diagnostic)
{
var formatDelim = tagContent.IndexOf(':');
var alignmentDelim = tagContent.IndexOf(',');
if (formatDelim == -1 && alignmentDelim == -1)
{
propertyNameAndDestructuring = tagContent;
format = null;
alignment = null;
diagnostic = null;
}
else
{
if (alignmentDelim == -1 || (formatDelim != -1 && alignmentDelim > formatDelim))
{
propertyNameAndDestructuring = tagContent.Substring(0, formatDelim);
format = formatDelim == tagContent.Length - 1 ?
null :
tagContent.Substring(formatDelim + 1);
alignment = null;
diagnostic = null;
}
else
{
propertyNameAndDestructuring = tagContent.Substring(0, alignmentDelim);
if (formatDelim == -1)
{
if (alignmentDelim == tagContent.Length - 1)
{
alignment = format = null;
diagnostic = new MessageTemplateDiagnostic(alignmentDelim, 1, "Found alignment specifier without alignment");
return(false);
}
format = null;
alignment = tagContent.Substring(alignmentDelim + 1);
}
else
{
if (alignmentDelim == formatDelim - 1)
{
alignment = format = null;
diagnostic = new MessageTemplateDiagnostic(alignmentDelim, 1, "Found alignment specifier without alignment");
return(false);
}
alignment = tagContent.Substring(alignmentDelim + 1, formatDelim - alignmentDelim - 1);
format = formatDelim == tagContent.Length - 1 ?
null :
tagContent.Substring(formatDelim + 1);
}
}
}
diagnostic = null;
return(true);
}
private static void ReportDiagnostic(ref SyntaxNodeAnalysisContext context, ref TextSpan literalSpan, string stringText, bool exactPositions, DiagnosticDescriptor rule, MessageTemplateDiagnostic diagnostic)
{
TextSpan textSpan;
if (diagnostic.MustBeRemapped)
{
if (!exactPositions)
{
textSpan = literalSpan;
}
else
{
int remappedStart = GetPositionInLiteral(stringText, diagnostic.StartIndex);
int remappedEnd = GetPositionInLiteral(stringText, diagnostic.StartIndex + diagnostic.Length);
textSpan = new TextSpan(literalSpan.Start + remappedStart, remappedEnd - remappedStart);
}
}
else
{
textSpan = new TextSpan(diagnostic.StartIndex, diagnostic.Length);
}
var sourceLocation = Location.Create(context.Node.SyntaxTree, textSpan);
context.ReportDiagnostic(Diagnostic.Create(rule, sourceLocation, diagnostic.Diagnostic));
}