Noissue - Make the key a template parameter for Map<>

compiled/StringMap.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #pragma once
 
 #include <cstddef>
 
 #include "Map.h"
 #include "String.h"
 
 namespace StringMap_internal
 {
+  template<typename Key,
+    class = typename std::enable_if<std::is_base_of<String, Key>::value>::type>
   struct StringSetEntry
   {
-    typedef DependentString key_type;
+    typedef Key key_type;
     typedef const String& key_type_cref;
     typedef size_t size_type;
 
     key_type first;
 
     StringSetEntry(key_type_cref key = key_type())
     {
       if (!key.is_invalid())
         first.reset(key);
     }
@@ skipping 21 matching lines @@
     static size_type hash(key_type_cref key)
     {
       // FNV-1a hash function
       size_type result = 2166136261;
       for (String::size_type i = 0; i < key.length(); i++)
         result = (result ^ key[i]) * 16777619;
       return result;
     }
   };
 
-  template<typename Value>
-  struct StringMapEntry : StringSetEntry
+  template<typename Key, typename Value>
+  struct StringMapEntry : StringSetEntry<Key>
   {
-    typedef StringSetEntry super;
+    typedef StringSetEntry<Key> super;
     typedef Value value_type;
 
     value_type second;
 
-    StringMapEntry(key_type_cref key = DependentString(),
+    StringMapEntry(typename super::key_type_cref key = Key(),
                    value_type value = value_type())
         : super(key), second(value)
     {
     }
 
     void erase()
     {
       super::erase();
       second = value_type();
     }
   };
 }
 
-using StringSet = Set<StringMap_internal::StringSetEntry>;
+using StringSet = Set<StringMap_internal::StringSetEntry<DependentString>>;
 
 template<typename Value>
-using StringMap = Map<StringMap_internal::StringMapEntry<Value>>;
+using StringMap = Map<StringMap_internal::StringMapEntry<DependentString, Value>>;
+template<typename Value>
+using OwnedStringMap = Map<StringMap_internal::StringMapEntry<OwnedString, Value>>;