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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2022 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy;
use Psy\Exception\BreakException;
use Psy\Exception\ThrowUpException;
/**
* The Psy Shell's execution loop scope.
*
* @todo Once we're on PHP 5.5, we can switch ExecutionClosure to a generator
* and get rid of the duplicate closure implementations :)
*/
class ExecutionLoopClosure extends ExecutionClosure
{
/**
* @param Shell $__psysh__
*/
public function __construct(Shell $__psysh__)
{
$this->setClosure($__psysh__, function () use ($__psysh__) {
// Restore execution scope variables
\extract($__psysh__->getScopeVariables(false));
while (true) {
$__psysh__->beforeLoop();
try {
$__psysh__->getInput();
try {
// Pull in any new execution scope variables
if ($__psysh__->getLastExecSuccess()) {
\extract($__psysh__->getScopeVariablesDiff(\get_defined_vars()));
}
// Buffer stdout; we'll need it later
\ob_start([$__psysh__, 'writeStdout'], 1);
// Convert all errors to exceptions
\set_error_handler([$__psysh__, 'handleError']);
// Evaluate the current code buffer
$_ = eval($__psysh__->onExecute($__psysh__->flushCode() ?: ExecutionClosure::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());
$__psysh__->writeReturnValue($_);
} catch (BreakException $_e) {
$__psysh__->writeException($_e);
return;
} catch (ThrowUpException $_e) {
$__psysh__->writeException($_e);
throw $_e;
} catch (\Throwable $_e) {
$__psysh__->writeException($_e);
}
$__psysh__->afterLoop();
}
});
}
}
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