tablepress / libraries / vendor / PhpSpreadsheet / Calculation / Engine / CyclicReferenceStack.php

CyclicReferenceStack.php in TablePress – Tables in WordPress made easy 3.4, at libraries/vendor/PhpSpreadsheet/Calculation/Engine/CyclicReferenceStack.php

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