I think it's there
<https://en.cppreference.com/w/cpp/string/basic_string/operator%2B%3D> -
(5) with StringViewLike

On Fri, Sep 1, 2023 at 12:48 PM Frederick Virchanza Gotham via
Std-Proposals <std-proposals_at_[hidden]> wrote:

> We need:
>
> string string::operator+(string_view)
> string &string::operator+=(string_view)
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