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	// NOTE: The "\G" assertion is an offset-aware version of "^".	// NOTE: The "\G" assertion is an offset-aware version of "^".
	$rule[0] = '(\\G'.$rule[0].')'.$flags;	$rule[0] = '(\\G'.$rule[0].')'.$flags;

	if (@preg_match($rule[0], '') === false) {	if (@@preg_match($rule[0], '') === false) {
	$error = error_get_last();	$error = error_get_last();
	throw new UnexpectedValueException(	throw new UnexpectedValueException(
	pht(	pht(
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	$this->lastState = null;	$this->lastState = null;

	$position = 0;	$position = 0;
	$length = strlen($input);	$length = @strlen($input);

	$tokens = array();	$tokens = array();
	$states = array();	$states = array();
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	foreach ($state_rules as $rule) {	foreach ($state_rules as $rule) {

	$matches = null;	$matches = null;
	if (!preg_match($rule[0], $input, $matches, 0, $position)) {	if (!@preg_match($rule[0], $input, $matches, 0, $position)) {
	continue;	continue;
	}	}

	list($regexp, $token_type, $next_state, $options) = $rule;	list($regexp, $token_type, $next_state, $options) = $rule;

	$match_length = strlen($matches[0]);	$match_length = @strlen($matches[0]);
	if (!$match_length) {	if (!$match_length) {
	if ($next_state === null) {	if ($next_state === null) {
	throw new UnexpectedValueException(	throw new UnexpectedValueException(
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