[libcxx-commits] [libcxx] [libc++] Complete `<charconv>` for 64-bit `long double` platforms (PR #117125)

[Michael Jones via libcxx-commits]

michaelrj-google wrote:

> > We already have support for most types of long double: 64 bit, 80 bit, and 128 bit. We currently don't support `long double` as `double double` (only used by zOS AFAIK), but that's the only variant that I know we're missing.
> 
> Why didn't we add that in the previous patch as well?

Keeping the initial patch focused, iirc. Adding the whole hand-in-hand mechanism was enough complexity that we decided to leave long double for a followup patch.

https://github.com/llvm/llvm-project/pull/117125