oficinasuport-wp-theme/vendor/wp-cli/php-cli-tools/lib/cli/arguments/Lexer.php

124 lines
2.3 KiB
PHP

<?php
/**
* PHP Command Line Tools
*
* This source file is subject to the MIT license that is bundled
* with this package in the file LICENSE.
*
* @author James Logsdon <dwarf@girsbrain.org>
* @copyright 2010 James Logsdom (http://girsbrain.org)
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
namespace cli\arguments;
use cli\Memoize;
class Lexer extends Memoize implements \Iterator {
private $_items = array();
private $_index = 0;
private $_length = 0;
private $_first = true;
/**
* @param array $items A list of strings to process as tokens.
*/
public function __construct(array $items) {
$this->_items = $items;
$this->_length = count($items);
}
/**
* The current token.
*
* @return string
*/
public function current() {
return $this->_item;
}
/**
* Peek ahead to the next token without moving the cursor.
*
* @return Argument
*/
public function peek() {
return new Argument($this->_items[0]);
}
/**
* Move the cursor forward 1 element if it is valid.
*/
public function next() {
if ($this->valid()) {
$this->_shift();
}
}
/**
* Return the current position of the cursor.
*
* @return int
*/
public function key() {
return $this->_index;
}
/**
* Move forward 1 element and, if the method hasn't been called before, reset
* the cursor's position to 0.
*/
public function rewind() {
$this->_shift();
if ($this->_first) {
$this->_index = 0;
$this->_first = false;
}
}
/**
* Returns true if the cursor has not reached the end of the list.
*
* @return bool
*/
public function valid() {
return ($this->_index < $this->_length);
}
/**
* Push an element to the front of the stack.
*
* @param mixed $item The value to set
*/
public function unshift($item) {
array_unshift($this->_items, $item);
$this->_length += 1;
}
/**
* Returns true if the cursor is at the end of the list.
*
* @return bool
*/
public function end() {
return ($this->_index + 1) == $this->_length;
}
private function _shift() {
$this->_item = new Argument(array_shift($this->_items));
$this->_index += 1;
$this->_explode();
$this->_unmemo('peek');
}
private function _explode() {
if (!$this->_item->canExplode) {
return false;
}
foreach ($this->_item->exploded as $piece) {
$this->unshift('-' . $piece);
}
}
}