Add new class SourceException that is the parent exception class for all custom exceptions

Author: sidkshatriya

lib/Sabberworm/CSS/Parsing/OutputException.php

@@ -5,17 +5,8 @@
 /**
 * Thrown if the CSS parsers attempts to print something invalid
 */
-class OutputException extends \Exception {
-    private $iLineNo;
+class OutputException extends SourceException {
     public function __construct($sMessage, $iLineNo = 0) {
-        $this->$iLineNo = $iLineNo;
-        if (!empty($iLineNo)) {
-            $sMessage .= " [line no: $iLineNo]";
-        }
-        parent::__construct($sMessage);
-    }
-
-    public function getLineNo() {
-        return $this->iLineNo;
+        parent::__construct($sMessage, $iLineNo);
     }
 }

lib/Sabberworm/CSS/Parsing/SourceException.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Sabberworm\CSS\Parsing;
+
+class SourceException extends \Exception {
+    private $iLineNo;
+    public function __construct($sMessage, $iLineNo = 0) {
+        $this->$iLineNo = $iLineNo;
+        if (!empty($iLineNo)) {
+            $sMessage .= " [line no: $iLineNo]";
+        }
+        parent::__construct($sMessage);
+    }
+
+    public function getLineNo() {
+        return $this->iLineNo;
+    }
+}

lib/Sabberworm/CSS/Parsing/UnexpectedTokenException.php

@@ -5,7 +5,7 @@
 /**
 * Thrown if the CSS parsers encounters a token it did not expect
 */
-class UnexpectedTokenException extends \Exception {
+class UnexpectedTokenException extends SourceException {
 	private $sExpected;
 	private $sFound;
 	// Possible values: literal, identifier, count, expression, search
@@ -28,11 +28,7 @@ public function __construct($sExpected, $sFound, $sMatchType = 'literal', $iLine
 			$sMessage = trim("$sExpected $sFound");
 		}
 
-		if (!empty($iLineNo)) {
-			$sMessage .= " [line no: $iLineNo]";
-		}
-
-		parent::__construct($sMessage);
+		parent::__construct($sMessage, $iLineNo);
 	}
 
 	public function getLineNo() {