/**
* This method return a tuple representing the token discovered.
*
* @access public
* @param \Unicity\IO\Reader $reader the reader to be used
* @return \Unicity\Lexer\Scanner\Tuple a tuple representing the token
* discovered
*/
public function process(IO\Reader $reader)
{
$index = $reader->position();
$char = $reader->readChar($index, false);
if ($char !== null && !$this->blacklist->hasValue($char)) {
$lookahead = $index;
do {
$lookahead++;
$next = $reader->readChar($lookahead, false);
} while ($next !== null && !$this->blacklist->hasValue($next));
$token = $reader->readRange($index, $lookahead);
$tuple = new Lexer\Scanner\Tuple(Lexer\Scanner\TokenType::keyword(), new Common\String($token));
return $tuple;
}
return null;
}
/**
* This method returns whether the second hash set is a superset of the first hash
* set.
*
* @access public
* @static
* @param Common\ISet $s1 the first set
* @param Common\ISet $s2 the second set
* @return Common\ISet whether the second hash set is a
* superset of the first hash set
*/
public static function isSuperset(Common\ISet $s1, Common\ISet $s2)
{
return $s2->hasValues($s1);
}