| 148 |
lars |
1 |
<?php
|
|
|
2 |
|
|
|
3 |
/*
|
|
|
4 |
* This file is part of Psy Shell.
|
|
|
5 |
*
|
| 200 |
lars |
6 |
* (c) 2012-2023 Justin Hileman
|
| 148 |
lars |
7 |
*
|
|
|
8 |
* For the full copyright and license information, please view the LICENSE
|
|
|
9 |
* file that was distributed with this source code.
|
|
|
10 |
*/
|
|
|
11 |
|
|
|
12 |
namespace Psy\CodeCleaner;
|
|
|
13 |
|
|
|
14 |
use PhpParser\Node;
|
|
|
15 |
use PhpParser\Node\Stmt\Do_;
|
|
|
16 |
use PhpParser\Node\Stmt\Function_;
|
|
|
17 |
use PhpParser\Node\Stmt\If_;
|
|
|
18 |
use PhpParser\Node\Stmt\Switch_;
|
|
|
19 |
use PhpParser\Node\Stmt\While_;
|
|
|
20 |
use Psy\Exception\FatalErrorException;
|
|
|
21 |
|
|
|
22 |
/**
|
|
|
23 |
* Validate that function calls will succeed.
|
|
|
24 |
*
|
|
|
25 |
* This pass throws a FatalErrorException rather than letting PHP run
|
|
|
26 |
* headfirst into a real fatal error and die.
|
|
|
27 |
*/
|
|
|
28 |
class ValidFunctionNamePass extends NamespaceAwarePass
|
|
|
29 |
{
|
|
|
30 |
private $conditionalScopes = 0;
|
|
|
31 |
|
|
|
32 |
/**
|
|
|
33 |
* Store newly defined function names on the way in, to allow recursion.
|
|
|
34 |
*
|
|
|
35 |
* @throws FatalErrorException if a function is redefined in a non-conditional scope
|
|
|
36 |
*
|
|
|
37 |
* @param Node $node
|
|
|
38 |
*
|
|
|
39 |
* @return int|Node|null Replacement node (or special return value)
|
|
|
40 |
*/
|
|
|
41 |
public function enterNode(Node $node)
|
|
|
42 |
{
|
|
|
43 |
parent::enterNode($node);
|
|
|
44 |
|
|
|
45 |
if (self::isConditional($node)) {
|
|
|
46 |
$this->conditionalScopes++;
|
|
|
47 |
} elseif ($node instanceof Function_) {
|
|
|
48 |
$name = $this->getFullyQualifiedName($node->name);
|
|
|
49 |
|
|
|
50 |
// @todo add an "else" here which adds a runtime check for instances where we can't tell
|
|
|
51 |
// whether a function is being redefined by static analysis alone.
|
|
|
52 |
if ($this->conditionalScopes === 0) {
|
|
|
53 |
if (\function_exists($name) ||
|
|
|
54 |
isset($this->currentScope[\strtolower($name)])) {
|
|
|
55 |
$msg = \sprintf('Cannot redeclare %s()', $name);
|
|
|
56 |
throw new FatalErrorException($msg, 0, \E_ERROR, null, $node->getLine());
|
|
|
57 |
}
|
|
|
58 |
}
|
|
|
59 |
|
|
|
60 |
$this->currentScope[\strtolower($name)] = true;
|
|
|
61 |
}
|
|
|
62 |
}
|
|
|
63 |
|
|
|
64 |
/**
|
|
|
65 |
* @param Node $node
|
|
|
66 |
*
|
|
|
67 |
* @return int|Node|Node[]|null Replacement node (or special return value)
|
|
|
68 |
*/
|
|
|
69 |
public function leaveNode(Node $node)
|
|
|
70 |
{
|
|
|
71 |
if (self::isConditional($node)) {
|
|
|
72 |
$this->conditionalScopes--;
|
|
|
73 |
}
|
|
|
74 |
}
|
|
|
75 |
|
|
|
76 |
private static function isConditional(Node $node)
|
|
|
77 |
{
|
|
|
78 |
return $node instanceof If_ ||
|
|
|
79 |
$node instanceof While_ ||
|
|
|
80 |
$node instanceof Do_ ||
|
|
|
81 |
$node instanceof Switch_;
|
|
|
82 |
}
|
|
|
83 |
}
|