wpdatatables / lib / phpoffice / phpspreadsheet / src / PhpSpreadsheet / Calculation / Engine / CyclicReferenceStack.php

CyclicReferenceStack.php in wpDataTables – WordPress Data Table, Dynamic Tables & Table Charts Plugin 6.5.1.7, at lib/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/Engine/CyclicReferenceStack.php

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1	<?php
2
3	namespace PhpOffice\PhpSpreadsheet\Calculation\Engine;
4
5	class CyclicReferenceStack
6	{
7	/**
8	* The call stack for calculated cells.
9	*
10	* @var mixed[]
11	*/
12	private $stack = [];
13
14	/**
15	* Return the number of entries on the stack.
16	*
17	* @return int
18	*/
19	public function count()
20	{
21	return count($this->stack);
22	}
23
24	/**
25	* Push a new entry onto the stack.
26	*
27	* @param mixed $value
28	*/
29	public function push($value): void
30	{
31	$this->stack[$value] = $value;
32	}
33
34	/**
35	* Pop the last entry from the stack.
36	*
37	* @return mixed
38	*/
39	public function pop()
40	{
41	return array_pop($this->stack);
42	}
43
44	/**
45	* Test to see if a specified entry exists on the stack.
46	*
47	* @param mixed $value The value to test
48	*
49	* @return bool
50	*/
51	public function onStack($value)
52	{
53	return isset($this->stack[$value]);
54	}
55
56	/**
57	* Clear the stack.
58	*/
59	public function clear(): void
60	{
61	$this->stack = [];
62	}
63
64	/**
65	* Return an array of all entries on the stack.
66	*
67	* @return mixed[]
68	*/
69	public function showStack()
70	{
71	return $this->stack;
72	}
73	}
74