Blame view

vendor/psy/psysh/src/CodeCleaner/CalledClassPass.php 2.33 KB
c4650843   Etienne Pallier   Ajout du dossier ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2018 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\CodeCleaner;

use PhpParser\Node;
use PhpParser\Node\Expr\ConstFetch;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Name;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\Trait_;
use Psy\Exception\ErrorException;

/**
 * The called class pass throws warnings for get_class() and get_called_class()
 * outside a class context.
 */
class CalledClassPass extends CodeCleanerPass
{
    private $inClass;

    /**
     * @param array $nodes
     */
    public function beforeTraverse(array $nodes)
    {
        $this->inClass = false;
    }

    /**
     * @throws ErrorException if get_class or get_called_class is called without an object from outside a class
     *
     * @param Node $node
     */
    public function enterNode(Node $node)
    {
        if ($node instanceof Class_ || $node instanceof Trait_) {
            $this->inClass = true;
        } elseif ($node instanceof FuncCall && !$this->inClass) {
            // We'll give any args at all (besides null) a pass.
            // Technically we should be checking whether the args are objects, but this will do for now.
            //
            // @todo switch this to actually validate args when we get context-aware code cleaner passes.
            if (!empty($node->args) && !$this->isNull($node->args[0])) {
                return;
            }

            // We'll ignore name expressions as well (things like `$foo()`)
            if (!($node->name instanceof Name)) {
                return;
            }

            $name = \strtolower($node->name);
            if (\in_array($name, ['get_class', 'get_called_class'])) {
                $msg = \sprintf('%s() called without object from outside a class', $name);
                throw new ErrorException($msg, 0, E_USER_WARNING, null, $node->getLine());
            }
        }
    }

    /**
     * @param Node $node
     */
    public function leaveNode(Node $node)
    {
        if ($node instanceof Class_) {
            $this->inClass = false;
        }
    }

    private function isNull(Node $node)
    {
        return $node->value instanceof ConstFetch && \strtolower($node->value->name) === 'null';
    }
}