style(base): marked default instance as [[maybe_unused]]

Doxyfile

@@ -48,7 +48,7 @@ PROJECT_NAME           = libconfig
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = v2.2.1
+PROJECT_NUMBER         = v2.2.2
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewers a

meson.build

@@ -18,7 +18,7 @@
 #   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 #
 # *********************************************************************** #
-project('libconfig', ['cpp', 'c'], version: 'v2.2.1', default_options: ['cpp_std=c++23'], meson_version: '>=1.5.0')
+project('libconfig', ['cpp', 'c'], version: 'v2.2.2', default_options: ['cpp_std=c++23'], meson_version: '>=1.5.0')
 
 # Add default visibility for all C++ targets
 add_project_arguments('-fvisibility=default', language: 'cpp')

src/config/include/fourdst/config/base.h

@@ -166,7 +166,7 @@ namespace fourdst::config {
          * @endcode
          */
         void save(std::string_view path) const {
-            T default_instance{};
+            [[maybe_unused]] T default_instance{};
             std::unordered_map<std::string, T> wrapper;
             wrapper[m_root_name] = m_content;
             const std::string toml_string = rfl::toml::write(wrapper);