fix compilation error.

Author: treefrogframework

src/tglobal.h

@@ -248,6 +248,11 @@ constexpr auto WriteOnly = QIODeviceBase::WriteOnly;
 #endif
 }
 
+
+#if defined(__cpp_lib_format) || (defined(_MSC_VER) && _MSC_VER >= 1930)  // std::format
+#define TF_HAVE_STD_FORMAT
+#endif
+
 #include "tfexception.h"
 #include "tfnamespace.h"
 #include "tdeclexport.h"
@@ -256,8 +261,8 @@ constexpr auto WriteOnly = QIODeviceBase::WriteOnly;
 #include <cstring>
 #include <functional>
 #include <algorithm>
-#if defined(__cpp_lib_format)  // std::format
-# include <format>
+#ifdef TF_HAVE_STD_FORMAT  // std::format
+#include <format>
 #endif
 
 class TWebApplication;
@@ -300,7 +305,7 @@ inline bool strcmp(const QByteArray &str1, const QByteArray &str2)
     return str1.length() == str2.length() && !std::strncmp(str1.data(), str2.data(), str1.length());
 }
 
-#if defined(__cpp_lib_format)  // std::format
+#ifdef TF_HAVE_STD_FORMAT  // std::format
 
 // Logging for developer
 template<typename... Args>

src/tsystemglobal.h

@@ -21,7 +21,7 @@ T_CORE_EXPORT void writeAccessLog(const TAccessLog &log);  // write access log
 T_CORE_EXPORT void writeQueryLog(const QString &query, bool success, const QSqlError &error, int duration);
 T_CORE_EXPORT void traceQuery(int duration, const std::string &msg);
 
-#if defined(__cpp_lib_format)  // std::format
+#ifdef TF_HAVE_STD_FORMAT  // std::format
 
 template<typename... Args>
 void traceQueryLog(int duration, const std::format_string<Args...> &fmt, Args&&... args)
@@ -53,7 +53,7 @@ enum SystemOpCode {
 T_CORE_EXPORT QMap<QString, QVariant> settingsToMap(QSettings &settings, const QString &env = QString());
 }
 
-#if defined(__cpp_lib_format)  // std::format
+#ifdef TF_HAVE_STD_FORMAT  // std::format
 
 template<typename... Args>
 void tSystemError(const std::format_string<Args...> &fmt, Args&&... args)
@@ -102,7 +102,7 @@ void tSystemInfo(const std::string &fmt, Args&&... args)
 #endif
 
 #ifndef TF_NO_DEBUG
-#if defined(__cpp_lib_format)  // std::format
+#ifdef TF_HAVE_STD_FORMAT  // std::format
 
 template<typename... Args>
 void tSystemDebug(const std::format_string<Args...> &fmt, Args&&... args)