public readonly TextSpan TextSpan; //opt
#endregion Fields
#region Constructors
public Diagnostic(DiagnosticSeverity severity, int code, string message, TextSpan textSpan)
{
Severity = severity;
Code = code;
Message = message;
TextSpan = textSpan;
}
public void AddDiag(DiagnosticSeverity severity, int code, string message, TextSpan textSpan)
{
DiagnosticList.Add(new Diagnostic(severity, code, message, textSpan));
}
private void ErrorAndThrow(string errMsg, TextSpan textSpan)
{
_context.AddDiag(DiagnosticSeverity.Error, Extensions.ParsingErrorCode, errMsg, textSpan);
throw ParsingException.Instance;
}
private string TryGetPpIdentifier(out TextSpan ts)
{
var ch = GetChar();
while (SyntaxFacts.IsWhitespace(ch))
{
ConsumeChar();
ch = GetChar();
}
if (SyntaxFacts.IsIdentifierStartCharacter(ch))
{
var sb = GetStringBuilder();
sb.Append(ch);
MarkTokenStart();
ConsumeChar();
while (true)
{
ch = GetChar();
if (SyntaxFacts.IsIdentifierPartCharacter(ch))
{
sb.Append(ch);
ConsumeChar();
}
else
{
break;
}
}
ts = CreateFullTextSpan();
return sb.ToString();
}
ts = default(TextSpan);
return null;
}
private string GetPpIdentifier(out TextSpan ts)
{
var s = TryGetPpIdentifier(out ts);
if (s == null)
{
ErrorAndThrow("Identifier expected.");
}
return s;
}
public TextSpan MergeWith(TextSpan follower)
{
return new TextSpan(FilePath, StartIndex, Length + follower.Length, StartPosition, follower.EndPosition);
}