N.B. Please CC *both* the libstdc++ list and the gcc-patches list, as
per https://gcc.gnu.org/lists.html

On Wed, 15 Sept 2021 at 14:02, 刘可 wrote:
>
> Thank you for your review, and I apologize for my mistake. I have updated and tested it！

Hmm, it doesn't work though. How did you test it?

For to_string(int) the string will be padded with '-' characters, i.e.
std::to_string(1) returns "1---------" and to_string(-1) returns
"-1---------" and to_string(100) returns "1--------00" !