Change ValueId to just be an enum class, it does not need any operators

src/buffer_utils.cc

@@ -89,7 +89,7 @@ void reload_file_buffer(Buffer& buffer)
 
 Buffer* create_fifo_buffer(String name, int fd, bool scroll)
 {
-    static ValueId s_fifo_watcher_id = ValueId::get_free_id();
+    static ValueId s_fifo_watcher_id = get_free_value_id();
 
     auto& buffer_manager = BufferManager::instance();
     Buffer* buffer = buffer_manager.get_buffer_ifp(name);

src/highlighters.cc

@@ -181,7 +181,7 @@ static HighlighterAndId create_fill_highlighter(HighlighterParameters params)
 template<typename T>
 struct BufferSideCache
 {
-    BufferSideCache() : m_id{ValueId::get_free_id()} {}
+    BufferSideCache() : m_id{get_free_value_id()} {}
 
     T& get(const Buffer& buffer)
     {

src/insert_completer.cc

@@ -67,7 +67,7 @@ namespace
 
 WordDB& get_word_db(const Buffer& buffer)
 {
-    static const ValueId word_db_id = ValueId::get_free_id();
+    static const ValueId word_db_id = get_free_value_id();
     Value& cache_val = buffer.values()[word_db_id];
     if (not cache_val)
         cache_val = Value(WordDB{buffer});

src/value.hh

@@ -68,16 +68,13 @@ private:
     std::unique_ptr<Concept> m_value;
 };
 
-struct ValueId : public StronglyTypedNumber<ValueId, int>
-{
-    constexpr ValueId(int value = 0) : StronglyTypedNumber(value) {}
+enum class ValueId : int {};
 
-    static ValueId get_free_id()
+inline ValueId get_free_value_id()
 {
-        static ValueId next;
-        return next++;
+    static int next = 0;
+    return (ValueId)(next++);
 }
-};
 
 using ValueMap = UnorderedMap<ValueId, Value, MemoryDomain::Values>;