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Edit File : ValidConstructorPass.php \| Size : 3.79 KB
<?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\Identifier; use PhpParser\Node\Stmt\Class_; use PhpParser\Node\Stmt\ClassMethod; use PhpParser\Node\Stmt\Namespace_; use Psy\Exception\FatalErrorException; /* * Validate that the constructor method is not static, and does not have a * return type. * * Checks both explicit __construct methods as well as old-style constructor * methods with the same name as the class (for non-namespaced classes). * * As of PHP 5.3.3, methods with the same name as the last element of a * namespaced class name will no longer be treated as constructor. This change * doesn't affect non-namespaced classes. * * @author Martin Hasoň <martin.hason@gmail.com> / class ValidConstructorPass extends CodeCleanerPass { private $namespace; public function beforeTraverse(array $nodes) { $this->namespace = []; } /* * Validate that the constructor is not static and does not have a return type. * * @throws FatalErrorException the constructor function is static * @throws FatalErrorException the constructor function has a return type * * @param Node $node / public function enterNode(Node $node) { if ($node instanceof Namespace_) { $this->namespace = isset($node->name) ? $node->name->parts : []; } elseif ($node instanceof Class_) { $constructor = null; foreach ($node->stmts as $stmt) { if ($stmt instanceof ClassMethod) { // If we find a new-style constructor, no need to look for the old-style if ('__construct' === \strtolower($stmt->name)) { $this->validateConstructor($stmt, $node); return; } // We found a possible old-style constructor (unless there is also a __construct method) if (empty($this->namespace) && \strtolower($node->name) === \strtolower($stmt->name)) { $constructor = $stmt; } } } if ($constructor) { $this->validateConstructor($constructor, $node); } } } /* * @throws FatalErrorException the constructor function is static * @throws FatalErrorException the constructor function has a return type * * @param Node $constructor * @param Node $classNode */ private function validateConstructor(Node $constructor, Node $classNode) { if ($constructor->isStatic()) { // For PHP Parser 4.x $className = $classNode->name instanceof Identifier ? $classNode->name->toString() : $classNode->name; $msg = \sprintf( 'Constructor %s::%s() cannot be static', \implode('\\', \array_merge($this->namespace, (array) $className)), $constructor->name ); throw new FatalErrorException($msg, 0, E_ERROR, null, $classNode->getLine()); } if (\method_exists($constructor, 'getReturnType') && $constructor->getReturnType()) { // For PHP Parser 4.x $className = $classNode->name instanceof Identifier ? $classNode->name->toString() : $classNode->name; $msg = \sprintf( 'Constructor %s::%s() cannot declare a return type', \implode('\\', \array_merge($this->namespace, (array) $className)), $constructor->name ); throw new FatalErrorException($msg, 0, E_ERROR, null, $classNode->getLine()); } } } Back

Edit File : ValidConstructorPass.php | Size : 3.79 KB

<?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\Identifier;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Stmt\Namespace_;
use Psy\Exception\FatalErrorException;

/**
 * Validate that the constructor method is not static, and does not have a
 * return type.
 *
 * Checks both explicit __construct methods as well as old-style constructor
 * methods with the same name as the class (for non-namespaced classes).
 *
 * As of PHP 5.3.3, methods with the same name as the last element of a
 * namespaced class name will no longer be treated as constructor. This change
 * doesn't affect non-namespaced classes.
 *
 * @author Martin Hasoň <martin.hason@gmail.com>
 */
class ValidConstructorPass extends CodeCleanerPass
{
    private $namespace;

public function beforeTraverse(array $nodes)
    {
        $this->namespace = [];
    }

/**
     * Validate that the constructor is not static and does not have a return type.
     *
     * @throws FatalErrorException the constructor function is static
     * @throws FatalErrorException the constructor function has a return type
     *
     * @param Node $node
     */
    public function enterNode(Node $node)
    {
        if ($node instanceof Namespace_) {
            $this->namespace = isset($node->name) ? $node->name->parts : [];
        } elseif ($node instanceof Class_) {
            $constructor = null;
            foreach ($node->stmts as $stmt) {
                if ($stmt instanceof ClassMethod) {
                    // If we find a new-style constructor, no need to look for the old-style
                    if ('__construct' === \strtolower($stmt->name)) {
                        $this->validateConstructor($stmt, $node);

return;
                    }

// We found a possible old-style constructor (unless there is also a __construct method)
                    if (empty($this->namespace) && \strtolower($node->name) === \strtolower($stmt->name)) {
                        $constructor = $stmt;
                    }
                }
            }

if ($constructor) {
                $this->validateConstructor($constructor, $node);
            }
        }
    }

/**
     * @throws FatalErrorException the constructor function is static
     * @throws FatalErrorException the constructor function has a return type
     *
     * @param Node $constructor
     * @param Node $classNode
     */
    private function validateConstructor(Node $constructor, Node $classNode)
    {
        if ($constructor->isStatic()) {
            // For PHP Parser 4.x
            $className = $classNode->name instanceof Identifier ? $classNode->name->toString() : $classNode->name;

$msg = \sprintf(
                'Constructor %s::%s() cannot be static',
                \implode('\\', \array_merge($this->namespace, (array) $className)),
                $constructor->name
            );
            throw new FatalErrorException($msg, 0, E_ERROR, null, $classNode->getLine());
        }

if (\method_exists($constructor, 'getReturnType') && $constructor->getReturnType()) {
            // For PHP Parser 4.x
            $className = $classNode->name instanceof Identifier ? $classNode->name->toString() : $classNode->name;

$msg = \sprintf(
                'Constructor %s::%s() cannot declare a return type',
                \implode('\\', \array_merge($this->namespace, (array) $className)),
                $constructor->name
            );
            throw new FatalErrorException($msg, 0, E_ERROR, null, $classNode->getLine());
        }
    }
}

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