protected override bool TryRunImpl(ISourceTextReader reader, out string text)
{
int index = 0;
for (; index < this.Characters.Length; index++)
{
if (reader.Character == this.Characters[index])
{
if (reader.Move(1))
{
continue;
}
}
break;
}
bool result;
if (index == this.Characters.Length)
{
text = this.Characters;
result = true;
}
else
{
if (index > 0)
{
if (!reader.Move(-index))
{
throw new InvalidOperationException();
}
}
text = null;
result = false;
}
return(result);
}
protected override bool TryRunImpl(ISourceTextReader reader, out string content)
{
bool result;
var text = reader.GetText();
var pos = reader.GetPosition();
var match = _regex.Match(text, pos);
if (match.Success && match.Index == pos)
{
content = match.Value;
result = reader.Move(match.Length);
}
else
{
content = null;
result = false;
}
return(result);
}
protected override bool TryRunImpl(ISourceTextReader reader, out string text)
{
text = reader.Character.ToString();
return(reader.Move(1));
}