+++ /dev/null
-<?php
-
-/*
- * This file is part of Psy Shell.
- *
- * (c) 2012-2017 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\Scalar\LNumber;
-use PhpParser\Node\Stmt\Declare_;
-use PhpParser\Node\Stmt\DeclareDeclare;
-use Psy\Exception\FatalErrorException;
-
-/**
- * Provide implicit strict types declarations for for subsequent execution.
- *
- * The strict types pass remembers the last strict types declaration:
- *
- * declare(strict_types=1);
- *
- * ... which it then applies implicitly to all future evaluated code, until it
- * is replaced by a new declaration.
- */
-class StrictTypesPass extends CodeCleanerPass
-{
- const EXCEPTION_MESSAGE = 'strict_types declaration must have 0 or 1 as its value';
-
- private $strictTypes = false;
-
- /**
- * If this is a standalone strict types declaration, remember it for later.
- *
- * Otherwise, apply remembered strict types declaration to to the code until
- * a new declaration is encountered.
- *
- * @throws FatalErrorException if an invalid `strict_types` declaration is found
- *
- * @param array $nodes
- */
- public function beforeTraverse(array $nodes)
- {
- if (version_compare(PHP_VERSION, '7.0', '<')) {
- return;
- }
-
- $prependStrictTypes = $this->strictTypes;
-
- foreach ($nodes as $key => $node) {
- if ($node instanceof Declare_) {
- foreach ($node->declares as $declare) {
- if ($declare->key === 'strict_types') {
- $value = $declare->value;
- if (!$value instanceof LNumber || ($value->value !== 0 && $value->value !== 1)) {
- throw new FatalErrorException(self::EXCEPTION_MESSAGE, 0, E_ERROR, null, $node->getLine());
- }
-
- $this->strictTypes = $value->value === 1;
- }
- }
- }
- }
-
- if ($prependStrictTypes) {
- $first = reset($nodes);
- if (!$first instanceof Declare_) {
- $declare = new Declare_(array(new DeclareDeclare('strict_types', new LNumber(1))));
- array_unshift($nodes, $declare);
- }
- }
-
- return $nodes;
- }
-}