PhutilProxyException.php
6beb131060efstable

PhutilProxyException.php
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			<?php

			/**
			* Prior to PHP 5.3, PHP does not support nested exceptions; this class provides
			* limited support for nested exceptions. Use methods on
			* @{class:PhutilErrorHandler} to unnest exceptions in a forward-compatible way.
			*
			* @concrete-extensible
			*/
			class PhutilProxyException extends Exception {

			private $previousException;

			public function __construct($message, $previous, $code = 0) {
			$this->previousException = $previous;

			// This may be an "Exception" or a "Throwable". The "__construct()" method
			// for the Exception is documented as taking an Exception, not a Throwable.
			// Although passing a Throwable appears to work in PHP 7.3, don't risk it.
			$is_exception = ($previous instanceof Exception);

			if (version_compare(PHP_VERSION, '5.3.0', '>=') && $is_exception) {
			parent::__construct($message, $code, $previous);
			} else {
			parent::__construct($message, $code);
			}
			}

			public function getPreviousException() {
			// NOTE: This can not be named "getPrevious()" because that method is final
			// after PHP 5.3. Similarly, the property can not be named "previous"
			// because HPHP declares a property with the same name and "protected"
			// visibility.
			return $this->previousException;
			}

			}