Add type annotations for URL

Author: oliverklee

src/Value/URL.php

@@ -4,17 +4,33 @@
 
 use Sabberworm\CSS\OutputFormat;
 use Sabberworm\CSS\Parsing\ParserState;
+use Sabberworm\CSS\Parsing\SourceException;
+use Sabberworm\CSS\Parsing\UnexpectedEOFException;
+use Sabberworm\CSS\Parsing\UnexpectedTokenException;
 
 class URL extends PrimitiveValue
 {
+    /**
+     * @var CSSString
+     */
     private $oURL;
 
+    /**
+     * @param int $iLineNo
+     */
     public function __construct(CSSString $oURL, $iLineNo = 0)
     {
         parent::__construct($iLineNo);
         $this->oURL = $oURL;
     }
 
+    /**
+     * @return URL
+     *
+     * @throws SourceException
+     * @throws UnexpectedEOFException
+     * @throws UnexpectedTokenException
+     */
     public static function parse(ParserState $oParserState)
     {
         $bUseUrl = $oParserState->comes('url', true);
@@ -32,11 +48,17 @@ public static function parse(ParserState $oParserState)
         return $oResult;
     }
 
+    /**
+     * @return void
+     */
     public function setURL(CSSString $oURL)
     {
         $this->oURL = $oURL;
     }
 
+    /**
+     * @return CSSString
+     */
     public function getURL()
     {
         return $this->oURL;