initial

porklib/Exceptions/ExceptionConstructorTrait.php

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+<?php
+
+namespace MightyPork\Exceptions;
+
+trait ExceptionConstructorTrait
+{
+	/**
+	 * Create from (Cause), or (Message, Cause).
+	 * Cause is Exception.
+	 *
+	 * @param mixed $arg1 Cause, or Message if second arg is Cause
+	 * @param mixed|null $arg2 Cause
+	 */
+	public function __construct($arg1 = null, $arg2 = null)
+	{
+		$cause = null;
+		$message = "";
+		if ($arg1 instanceof \Exception) {
+			// Invoked without a message, only cause
+			$cause = $arg1;
+			$message = $cause->getMessage(); // Repeat the message so it's easy to see in the logs
+		} elseif (is_string($arg1)) {
+			// First is message
+			$message = $arg1;
+			// Second, optional, is a cause
+			if ($arg2 instanceof \Exception) {
+				$cause = $arg2;
+			}
+		}
+		// call Exception constructor
+		parent::__construct($message, 0, $cause);
+	}
+}