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Edit File : ValidConstantPass.php \| Size : 3.13 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\Expr; use PhpParser\Node\Expr\ClassConstFetch; use PhpParser\Node\Expr\ConstFetch; use PhpParser\Node\Identifier; use Psy\Exception\FatalErrorException; /* * Validate that namespaced constant references will succeed. * * This pass throws a FatalErrorException rather than letting PHP run * headfirst into a real fatal error and die. * * @todo Detect constants defined in the current code snippet? * ... Might not be worth it, since it would need to both be defining and * referencing a namespaced constant, which doesn't seem like that big of * a target for failure / class ValidConstantPass extends NamespaceAwarePass { /* * Validate that namespaced constant references will succeed. * * Note that this does not (yet) detect constants defined in the current code * snippet. It won't happen very often, so we'll punt for now. * * @throws FatalErrorException if a constant reference is not defined * * @param Node $node / public function leaveNode(Node $node) { if ($node instanceof ConstFetch && \count($node->name->parts) > 1) { $name = $this->getFullyQualifiedName($node->name); if (!\defined($name)) { $msg = \sprintf('Undefined constant %s', $name); throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine()); } } elseif ($node instanceof ClassConstFetch) { $this->validateClassConstFetchExpression($node); } } /* * Validate a class constant fetch expression. * * @throws FatalErrorException if a class constant is not defined * * @param ClassConstFetch $stmt */ protected function validateClassConstFetchExpression(ClassConstFetch $stmt) { // For PHP Parser 4.x $constName = $stmt->name instanceof Identifier ? $stmt->name->toString() : $stmt->name; // give the `class` pseudo-constant a pass if ($constName === 'class') { return; } // if class name is an expression, give it a pass for now if (!$stmt->class instanceof Expr) { $className = $this->getFullyQualifiedName($stmt->class); // if the class doesn't exist, don't throw an exception… it might be // defined in the same line it's used or something stupid like that. if (\class_exists($className) \|\| \interface_exists($className)) { $refl = new \ReflectionClass($className); if (!$refl->hasConstant($constName)) { $constType = \class_exists($className) ? 'Class' : 'Interface'; $msg = \sprintf('%s constant \'%s::%s\' not found', $constType, $className, $constName); throw new FatalErrorException($msg, 0, E_ERROR, null, $stmt->getLine()); } } } } } Back

Edit File : ValidConstantPass.php | Size : 3.13 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\Expr;
use PhpParser\Node\Expr\ClassConstFetch;
use PhpParser\Node\Expr\ConstFetch;
use PhpParser\Node\Identifier;
use Psy\Exception\FatalErrorException;

/**
 * Validate that namespaced constant references will succeed.
 *
 * This pass throws a FatalErrorException rather than letting PHP run
 * headfirst into a real fatal error and die.
 *
 * @todo Detect constants defined in the current code snippet?
 *       ... Might not be worth it, since it would need to both be defining and
 *       referencing a namespaced constant, which doesn't seem like that big of
 *       a target for failure
 */
class ValidConstantPass extends NamespaceAwarePass
{
    /**
     * Validate that namespaced constant references will succeed.
     *
     * Note that this does not (yet) detect constants defined in the current code
     * snippet. It won't happen very often, so we'll punt for now.
     *
     * @throws FatalErrorException if a constant reference is not defined
     *
     * @param Node $node
     */
    public function leaveNode(Node $node)
    {
        if ($node instanceof ConstFetch && \count($node->name->parts) > 1) {
            $name = $this->getFullyQualifiedName($node->name);
            if (!\defined($name)) {
                $msg = \sprintf('Undefined constant %s', $name);
                throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine());
            }
        } elseif ($node instanceof ClassConstFetch) {
            $this->validateClassConstFetchExpression($node);
        }
    }

/**
     * Validate a class constant fetch expression.
     *
     * @throws FatalErrorException if a class constant is not defined
     *
     * @param ClassConstFetch $stmt
     */
    protected function validateClassConstFetchExpression(ClassConstFetch $stmt)
    {
        // For PHP Parser 4.x
        $constName = $stmt->name instanceof Identifier ? $stmt->name->toString() : $stmt->name;

// give the `class` pseudo-constant a pass
        if ($constName === 'class') {
            return;
        }

// if class name is an expression, give it a pass for now
        if (!$stmt->class instanceof Expr) {
            $className = $this->getFullyQualifiedName($stmt->class);

// if the class doesn't exist, don't throw an exception… it might be
            // defined in the same line it's used or something stupid like that.
            if (\class_exists($className) || \interface_exists($className)) {
                $refl = new \ReflectionClass($className);
                if (!$refl->hasConstant($constName)) {
                    $constType = \class_exists($className) ? 'Class' : 'Interface';
                    $msg = \sprintf('%s constant \'%s::%s\' not found', $constType, $className, $constName);
                    throw new FatalErrorException($msg, 0, E_ERROR, null, $stmt->getLine());
                }
            }
        }
    }
}

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