<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2025 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy;

/**
 * The Psy Shell's execution scope.
 */
class ExecutionClosure
{
    const NOOP_INPUT = 'return null;';

    private \Closure $closure;

    /**
     * @param Shell $__psysh__
     */
    public function __construct(Shell $__psysh__)
    {
        $this->setClosure($__psysh__, function () use ($__psysh__) {
            try {
                // Restore execution scope variables
                \extract($__psysh__->getScopeVariables(false));

                // Buffer stdout; we'll need it later
                \ob_start([$__psysh__, 'writeStdout'], 1);

                // Convert all errors to exceptions
                \set_error_handler([$__psysh__, 'handleError']);

                // Evaluate the current code buffer
                $_ = eval($__psysh__->onExecute($__psysh__->flushCode() ?: self::NOOP_INPUT));
            } catch (\Throwable $_e) {
                // Clean up on our way out.
                if (\ob_get_level() > 0) {
                    \ob_end_clean();
                }

                throw $_e;
            } finally {
                // Won't be needing this anymore
                \restore_error_handler();
            }

            // Flush stdout (write to shell output, plus save to magic variable)
            \ob_end_flush();

            // Save execution scope variables for next time
            $__psysh__->setScopeVariables(\get_defined_vars());

            return $_;
        });
    }

    /**
     * Set the closure instance.
     *
     * @param Shell    $shell
     * @param \Closure $closure
     */
    protected function setClosure(Shell $shell, \Closure $closure)
    {
        $that = $shell->getBoundObject();

        if (\is_object($that)) {
            $this->closure = $closure->bindTo($that, \get_class($that));
        } else {
            $this->closure = $closure->bindTo(null, $shell->getBoundClass());
        }
    }

    /**
     * Go go gadget closure.
     *
     * @return mixed
     */
    public function execute()
    {
        $closure = $this->closure;

        return $closure();
    }
}

• [D] CodeCleaner
• [D] Command
• [D] Exception
• [D] ExecutionLoop
• [D] Formatter
• [D] Input
• [D] Logger
• [D] Manual
• [D] ManualUpdater
• [D] Output
• [D] Readline
• [D] Reflection
• [D] Sudo
• [D] TabCompletion
• [D] Util
• [D] VarDumper
• [D] VersionUpdater
• [F] CodeCleaner.php
  Delete
• [F] CodeCleanerAware.php
  Delete
• [F] ConfigPaths.php
  Delete
• [F] Configuration.php
  Delete
• [F] Context.php
  Delete
• [F] ContextAware.php
  Delete
• [F] EnvInterface.php
  Delete
• [F] ExecutionClosure.php
  Delete
• [F] ExecutionLoopClosure.php
  Delete
• [F] functions.php
  Delete
• [F] ParserFactory.php
  Delete
• [F] Shell.php
  Delete
• [F] ShellLogger.php
  Delete
• [F] Sudo.php
  Delete
• [F] SuperglobalsEnv.php
  Delete
• [F] SystemEnv.php
  Delete

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