71 lines
1.6 KiB
PHP
71 lines
1.6 KiB
PHP
<?php
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/*
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* This file is part of Psy Shell.
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*
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* (c) 2012-2018 Justin Hileman
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Psy\CodeCleaner;
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use PhpParser\Node;
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use PhpParser\Node\Stmt\Class_;
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use Psy\Exception\FatalErrorException;
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/**
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* The final class pass handles final classes.
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*/
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class FinalClassPass extends CodeCleanerPass
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{
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private $finalClasses;
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/**
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* @param array $nodes
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*/
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public function beforeTraverse(array $nodes)
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{
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$this->finalClasses = [];
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}
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/**
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* @throws RuntimeException if the node is a class that extends a final class
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*
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* @param Node $node
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*/
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public function enterNode(Node $node)
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{
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if ($node instanceof Class_) {
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if ($node->extends) {
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$extends = (string) $node->extends;
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if ($this->isFinalClass($extends)) {
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$msg = \sprintf('Class %s may not inherit from final class (%s)', $node->name, $extends);
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throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine());
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}
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}
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if ($node->isFinal()) {
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$this->finalClasses[\strtolower($node->name)] = true;
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}
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}
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}
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/**
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* @param string $name Class name
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*
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* @return bool
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*/
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private function isFinalClass($name)
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{
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if (!\class_exists($name)) {
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return isset($this->finalClasses[\strtolower($name)]);
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}
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$refl = new \ReflectionClass($name);
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return $refl->isFinal();
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}
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}
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