Index: trunk/src/org/openstreetmap/josm/data/validation/tests/MapCSSTagChecker.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/MapCSSTagChecker.java	(revision 15983)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/MapCSSTagChecker.java	(revision 15984)
@@ -702,5 +702,5 @@
             MapCSSRule r = candidates.next();
             env.clearSelectorMatchingInformation();
-            if (r.selector.matches(env)) { // as side effect env.parent will be set (if s is a child selector)
+            if (r.matches(env)) { // as side effect env.parent will be set (if s is a child selector)
                 TagCheck check = indexData.getCheck(r);
                 if (check != null) {
Index: trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSRule.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSRule.java	(revision 15983)
+++ trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/MapCSSRule.java	(revision 15984)
@@ -35,7 +35,21 @@
 
     /**
+     * Test whether the selector of this rule applies to the primitive.
+     *
+     * @param env the Environment. env.mc and env.layer are read-only when matching a selector.
+     * env.source is not needed. This method will set the matchingReferrers field of env as
+     * a side effect! Make sure to clear it before invoking this method.
+     * @return true, if the selector applies
+     * @see Selector#matches
+     */
+    public boolean matches(Environment env) {
+        return selector.matches(env);
+    }
+
+    /**
      * <p>Executes the instructions against the environment {@code env}</p>
      *
      * @param env the environment
+     * @see Declaration#execute
      */
     public void execute(Environment env) {