/**
* Sets the character code. It can be 0, 1 or 2 digits that represents
* the octal number that identifies the character
*
* @param string $char Character to match
*
* @return OctalChar
*
* @throws \REBuilder\Exception\Generic
*
* @link http://php.net/manual/en/regexp.reference.escape.php
*/
public function setChar($char)
{
if (!preg_match("#^(?:0[0-7]{1,2}|[0-7]{2,3})\$#", $char)) {
throw new \REBuilder\Exception\Generic("Invalid octal character '{$char}'");
}
return parent::setChar($char);
}
/**
* Sets the character code . It can be 0, 1 or 2 hexadecimal digits
* that represent a character code
*
* @param string $char Character to match
*
* @return HexChar
*
* @throws \REBuilder\Exception\Generic
*
* @link http://php.net/manual/en/regexp.reference.escape.php
*/
public function setChar($char)
{
if ($char !== "" && !\REBuilder\Parser\Rules::validateHexString($char)) {
throw new \REBuilder\Exception\Generic("Invalid hexadecimal sequence '{$char}'");
} elseif (strlen($char) > 2) {
throw new \REBuilder\Exception\Generic("Hexadecimal character can match a maximum of 2 digits");
}
return parent::setChar($char);
}
/**
* Returns the string representation of the class
*
* @return string
*/
public function render()
{
return "\\c" . parent::render() . $this->_renderRepetition();
}
/**
* Returns the string representation of the class
*
* @return string
*/
public function render()
{
$char = parent::render();
$needsGroup = strlen($this->getChar()) > 1 && $this->getRepetition();
return ($needsGroup ? "(?:{$char})" : $char) . $this->_renderRepetition();
}