[PATCH] libstdc++: implement LWG3662 basic_string::append/assign(NTBS, pos, n) suboptimal

[Tomasz Kaminski]

Are the following checks correct? I think we need string of at least
length __pos + __len.
__glibcxx_requires_string_len(__s, __n);




On Wed, Jul 1, 2026 at 4:41 PM Yuao Ma <addr2line@gmail.com> wrote:

> Hi!
>
> This patch implements LWG3662 for C++11 ABI and COW ABI of strings.
>
> Tested on x86_64 linux, ok for trunk?
>
> Thanks,
> Yuao
>
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