Fixed tidy warnings

src/details/file_helper.cpp

@@ -62,13 +62,13 @@ void file_helper::reopen(bool truncate) {
     this->open(filename_, truncate);
 }
 
-void file_helper::flush() {
+void file_helper::flush() const {
     if (std::fflush(fd_) != 0) {
         throw_spdlog_ex("Failed flush to file " + os::filename_to_str(filename_), errno);
     }
 }
 
-void file_helper::sync() {
+void file_helper::sync() const {
     if (!os::fsync(fd_)) {
         throw_spdlog_ex("Failed to fsync file " + os::filename_to_str(filename_), errno);
     }
@@ -89,9 +89,9 @@ void file_helper::close() {
     }
 }
 
-void file_helper::write(const memory_buf_t &buf) {
+void file_helper::write(const memory_buf_t &buf) const {
     if (fd_ == nullptr) return;
-    size_t msg_size = buf.size();
+    const size_t msg_size = buf.size();
     const auto *data = buf.data();
     if (std::fwrite(data, 1, msg_size, fd_) != msg_size) {
         throw_spdlog_ex("Failed writing to file " + os::filename_to_str(filename_), errno);

src/details/registry.cpp

@@ -113,7 +113,7 @@ std::shared_ptr<logger> registry::default_logger() {
 // To be used directly by the spdlog default api (e.g. spdlog::info)
 // This make the default API faster, but cannot be used concurrently with set_default_logger().
 // e.g do not call set_default_logger() from one thread while calling spdlog::info() from another.
-logger *registry::get_default_raw() { return default_logger_.get(); }
+logger *registry::get_default_raw() const { return default_logger_.get(); }
 
 // set default logger.
 // default logger is stored in default_logger_ (for faster retrieval) and in the loggers_ map.

src/sinks/ansicolor_sink.cpp

@@ -34,7 +34,7 @@ void ansicolor_sink<Mutex>::set_color(level color_level, string_view_t color) {
 }
 
 template <typename Mutex>
-bool ansicolor_sink<Mutex>::should_color() {
+bool ansicolor_sink<Mutex>::should_color() const {
     return should_do_colors_;
 }