Skip to content
  • P
    Projects
  • G
    Groups
  • S
    Snippets
  • Help

孙龙 / note-library

  • This project
    • Loading...
  • Sign in
Go to a project
  • Project
  • Repository
  • Issues 0
  • Merge Requests 0
  • Pipelines
  • Wiki
  • Snippets
  • Settings
  • Activity
  • Graph
  • Charts
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
  • Files
  • Commits
  • Branches
  • Tags
  • Contributors
  • Graph
  • Compare
  • Charts
Find file
BlameHistoryPermalink
Switch branch/tag
  • note-library
  • ..
  • CodeCleaner
  • CalledClassPass.php
  • 孙龙's avatar
    init · 1f46a6ed
    孙龙 committed 5 years ago
    1f46a6ed
CalledClassPass.php 2.37 KB
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) 2012-2015 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_ as ClassStmt;
use PhpParser\Node\Stmt\Trait_ as TraitStmt;
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 ClassStmt || $node instanceof TraitStmt) {
            $this->inClass = true;
        } elseif ($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, array('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 ClassStmt) {
            $this->inClass = false;
        }
    }

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