97 lines
1.9 KiB
PHP
97 lines
1.9 KiB
PHP
<?php
|
|
|
|
/**
|
|
* @author Tassos.gr <info@tassos.gr>
|
|
* @link https://www.tassos.gr
|
|
* @copyright Copyright © 2024 Tassos All Rights Reserved
|
|
* @license GNU GPLv3 <http://www.gnu.org/licenses/gpl.html> or later
|
|
*/
|
|
|
|
namespace NRFramework\Parser;
|
|
|
|
defined('_JEXEC') or die;
|
|
|
|
/**
|
|
* Tokens
|
|
* Holds token types and manages creation of new tokens
|
|
*/
|
|
class Tokens
|
|
{
|
|
/**
|
|
* Token types array
|
|
*
|
|
* @var array
|
|
*/
|
|
protected $types = [];
|
|
|
|
public function __construct()
|
|
{
|
|
// default types
|
|
$this->addType('invalid_token');
|
|
$this->addType('EOF');
|
|
}
|
|
|
|
/**
|
|
* Adds a new token type
|
|
*
|
|
* @param string $type
|
|
* @return $this
|
|
*/
|
|
public function addType($type)
|
|
{
|
|
if (!$this->hasType($type))
|
|
{
|
|
$this->types[] = $type;
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Gets a token type id (i.e. it's array index)
|
|
*
|
|
* @param string $type
|
|
* @return int|null
|
|
*/
|
|
public function getTypeId($type)
|
|
{
|
|
$id = array_search($type, $this->types);
|
|
$id = $id !== false ? $id : null;
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* Returns the token types array
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getTypes()
|
|
{
|
|
return clone $this->types;
|
|
}
|
|
|
|
/**
|
|
* Creates a new token
|
|
*
|
|
* @param string $type
|
|
* @param string $text
|
|
* @param integer $position, Position of token in the input stream
|
|
* @return Token
|
|
*/
|
|
public function create($type, $text, $position)
|
|
{
|
|
return new Token($type, $text, $position);
|
|
}
|
|
|
|
/**
|
|
* Checks if a type is registered
|
|
*
|
|
* @param string $type
|
|
* @return boolean
|
|
*/
|
|
public function hasType($type)
|
|
{
|
|
return (bool)array_search($type, $this->types);
|
|
}
|
|
}
|