symfony 2.2 can have any string as route name. fix symfony#49

Author: dbu

ChainRouter.php

@@ -199,10 +199,14 @@ public function generate($name, $parameters = array(), $absolute = false)
         /** @var $router RouterInterface */
         foreach ($this->all() as $router) {
 
-            // if $name and $router does not implement ChainedRouterInterface and $name is not a string, continue
-            // if $name and $router does not implement ChainedRouterInterface and $name is string but does not match a default Symfony2 route name, continue
+            // if $router does not implement ChainedRouterInterface and $name is not a string, continue
+            // if $router does not implement ChainedRouterInterface and $name is string, but does not match a valid Symfony2.1 route name, continue
             if ($name && !$router instanceof ChainedRouterInterface) {
-                if (!is_string($name) || !preg_match(VersatileGeneratorInterface::CORE_NAME_PATTERN, $name)) {
+                if (! is_string($name)
+                    || (! class_exists('Symfony\Component\Routing\Matcher\Dumper\DumperRoute') // only Symfony 2.2
+                        && ! preg_match(VersatileGeneratorInterface::CORE_NAME_PATTERN, $name)
+                       )
+                ) {
                     continue;
                 }
             }

VersatileGeneratorInterface.php

@@ -11,8 +11,8 @@
 interface VersatileGeneratorInterface extends UrlGeneratorInterface
 {
     /**
-     * If $name preg_match this pattern, the name is valid for symfony core
-     * compatible generators.
+     * If $name preg_match this pattern, the name is valid for symfony 2.1 core
+     * compatible generators. In 2.2 the pattern may be any string.
      */
     const CORE_NAME_PATTERN = '/^[a-z0-9A-Z_.]+$/';