Allow rules to declare they only accept a set of options (#1560)

src/main/java/carpet/settings/ParsedRule.java

@@ -85,9 +85,9 @@ public final class ParsedRule<T> implements CarpetRule<T>, Comparable<ParsedRule
     @Deprecated(forRemoval = true) // to private (and rename?)
     public final List<String> options;
     /**
-     * @deprecated No replacement for this
+     * @deprecated Use {@link CarpetRule#strict()} instead
      */
-    @Deprecated(forRemoval = true) // to pckg private (for printRulesToLog, or get a different way)
+    @Deprecated(forRemoval = true) // to remove or fix
     public boolean isStrict;
     /**
      * @deprecated Use {@link CarpetRule#canBeToggledClientSide()} instead
@@ -391,6 +391,11 @@ public final class ParsedRule<T> implements CarpetRule<T>, Comparable<ParsedRule
         set(source, value, RuleHelper.toRuleString(value));
     }
 
+    @Override
+    public boolean strict() {
+        return !realValidators.isEmpty() && realValidators.get(0) instanceof Validator.StrictValidator;
+    }
+
     private static <T> Map.Entry<Class<T>, FromStringConverter<T>> numericalConverter(Class<T> outputClass, Function<String, T> converter) {
         return Map.entry(outputClass, str -> {
             try {