keep filename as it's public

include/spdlog/sinks/daily_file_sink.h

@@ -70,6 +70,12 @@ public:
         }
     }
 
+    filename_t filename()
+    {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
+        return file_helper_.filename();
+    }
+
 protected:
     void sink_it_(const details::log_msg &msg) override
     {

include/spdlog/sinks/rotating_file_sink-inl.h

@@ -53,6 +53,13 @@ SPDLOG_INLINE filename_t rotating_file_sink<Mutex>::calc_filename(const filename
     return fmt::format(SPDLOG_FILENAME_T("{}.{}{}"), basename, index, ext);
 }
 
+template<typename Mutex>
+SPDLOG_INLINE filename_t rotating_file_sink<Mutex>::filename()
+{
+    std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
+    return file_helper_.filename();
+}
+
 template<typename Mutex>
 SPDLOG_INLINE void rotating_file_sink<Mutex>::sink_it_(const details::log_msg &msg)
 {

include/spdlog/sinks/rotating_file_sink.h

@@ -24,6 +24,7 @@ class rotating_file_sink final : public base_sink<Mutex>
 public:
     rotating_file_sink(filename_t base_filename, std::size_t max_size, std::size_t max_files, bool rotate_on_open = false);
     static filename_t calc_filename(const filename_t &filename, std::size_t index);
+    filename_t filename();
 
 protected:
     void sink_it_(const details::log_msg &msg) override;