Optimize logging of const strings.

GitOrigin-RevId: af8de902d07c4862a77e0d8050db47ee1ccacbf6

tdutils/td/utils/StringBuilder.h

@@ -39,9 +39,22 @@ class StringBuilder {
     return error_flag_;
   }
 
-  StringBuilder &operator<<(const char *str) {
+  template <class T>
+  std::enable_if_t<std::is_same<char *, std::remove_const_t<T>>::value, StringBuilder> &operator<<(T str) {
     return *this << Slice(str);
   }
+  template <class T>
+  std::enable_if_t<std::is_same<const char *, std::remove_const_t<T>>::value, StringBuilder> &operator<<(T str) {
+    return *this << Slice(str);
+  }
+
+  template <size_t N>
+  StringBuilder &operator<<(char (&str)[N]) = delete;
+
+  template <size_t N>
+  StringBuilder &operator<<(const char (&str)[N]) {
+    return *this << Slice(str, N - 1);
+  }
 
   StringBuilder &operator<<(const wchar_t *str) = delete;
 
@@ -94,11 +107,6 @@ class StringBuilder {
 
   StringBuilder &operator<<(const void *ptr);
 
-  template <class T>
-  StringBuilder &operator<<(const T *ptr) {
-    return *this << static_cast<const void *>(ptr);
-  }
-
  private:
   char *begin_ptr_;
   char *current_ptr_;