public override Token Eval(TokenExtractor extractor)
{
EnsureExtractor(extractor, nameof(extractor));
// TODO: Remover tratamento de cursor do extrator
// Isso será garantido pelo anterior?
var cursor = extractor.SaveCursor();
try
{
var c = extractor.NextChar();
if (c == _char)
{
return(new Token(c)
{
ContentPosBegin = cursor.Position,
ContentLength = extractor.SaveCursor().Position - cursor.Position
});
}
}
catch (Exception)
{
extractor.RollbackCursor(cursor);
throw;
}
extractor.RollbackCursor(cursor);
return(null);
}