Keep clang-tidy happy

.clang-tidy

-Checks: 'modernize-*,modernize-use-override,google-*,-google-runtime-references,misc-*,clang-analyzer-*'
+Checks: 'modernize-*,modernize-use-override,google-*,-google-runtime-references,misc-*,clang-analyzer-*,-misc-non-private-member-variables-in-classes'
 WarningsAsErrors: ''
 HeaderFilterRegex: 'async.h|async_logger.h|common.h|details|formatter.h|logger.h|sinks|spdlog.h|tweakme.h|version.h'
 AnalyzeTemporaryDtors: false

include/spdlog/details/file_helper.h

@@ -16,8 +16,6 @@ namespace details {
 class file_helper
 {
 public:
-    const int open_tries = 5;
-    const int open_interval = 10;
     explicit file_helper() = default;
 
     file_helper(const file_helper &) = delete;
@@ -49,6 +47,8 @@ public:
     static std::tuple<filename_t, filename_t> split_by_extension(const filename_t &fname);
 
 private:
+    const int open_tries = 5;
+    const int open_interval = 10;
     std::FILE *fd_{nullptr};
     filename_t _filename;
 };

include/spdlog/details/os-inl.h

@@ -15,6 +15,7 @@
 #include <ctime>
 #include <string>
 #include <thread>
+#include <array>
 #include <sys/stat.h>
 #include <sys/types.h>
 
@@ -370,7 +371,7 @@ SPDLOG_INLINE bool is_color_terminal() SPDLOG_NOEXCEPT
 #ifdef _WIN32
     return true;
 #else
-    static constexpr const char *Terms[] = {
+    static constexpr std::array<const char *, 14>Terms = {
             "ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux", "msys", "putty", "rxvt", "screen", "vt100", "xterm"};
 
     const char *env_p = std::getenv("TERM");

include/spdlog/details/pattern_formatter-inl.h

@@ -163,7 +163,7 @@ static int to12h(const tm &t)
 }
 
 // Abbreviated weekday name
-static const char *days[]{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
+static std::array<const char*, 7> days{"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
 class a_formatter : public flag_formatter
 {
 public:
@@ -180,7 +180,7 @@ public:
 };
 
 // Full weekday name
-static const char *full_days[]{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
+static std::array<const char *, 7> full_days{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
 class A_formatter : public flag_formatter
 {
 public:
@@ -197,7 +197,7 @@ public:
 };
 
 // Abbreviated month
-static const char *months[]{"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"};
+static const std::array<const char *, 12> months {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"};
 class b_formatter : public flag_formatter
 {
 public:
@@ -214,8 +214,9 @@ public:
 };
 
 // Full month name
-static const char *full_months[]{
+static const std::array<const char *, 12> full_months {
         "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
+
 class B_formatter : public flag_formatter
 {
 public:
@@ -575,7 +576,7 @@ public:
     explicit z_formatter(padding_info padinfo)
         : flag_formatter(padinfo){}
 
-    const std::chrono::seconds cache_refresh = std::chrono::seconds(5);
+
 
     z_formatter() = default;
     z_formatter(const z_formatter &) = delete;
@@ -617,7 +618,8 @@ private:
 
     int get_cached_offset(const log_msg &msg, const std::tm &tm_time)
     {
-        if (msg.time - last_update_ >= cache_refresh)
+        // refresh every 10 seconds
+        if (msg.time - last_update_ >= std::chrono::seconds(10))
         {
             offset_minutes_ = os::utc_minutes_offset(tm_time);
             last_update_ = msg.time;

include/spdlog/logger.h

@@ -32,9 +32,10 @@ class logger
 {
 public:
     // Empty logger
-    logger(std::string name) :
+    explicit logger(std::string name) :
             name_(std::move(name)),
-            sinks_(){}
+            sinks_()
+    {}
 
     // Logger with range on sinks
     template<typename It>

include/spdlog/sinks/ansicolor_sink.h

@@ -29,7 +29,7 @@ class ansicolor_sink final : public sink
 {
 public:
     using mutex_t = typename ConsoleMutex::mutex_t;
-    ansicolor_sink(color_mode mode = color_mode::automatic);
+    explicit ansicolor_sink(color_mode mode = color_mode::automatic);
     ~ansicolor_sink() override = default;
 
     ansicolor_sink(const ansicolor_sink &other) = delete;