[boost] Re: Decimal Library re-review begins today

Matt Borland wrote:

Then the D format parameter could be an inherited decision from C, and be used with {fmt}/<format> since the quoted clause specifies this as a language level decision for implementation.

`D` specifies `_Decimal64`, `H` specifies `_Decimal32`, and `DD` specifies `_Decimal128`. The `a` specifier for decimal floating-point types indicates quantum-preserving form and stands for "actual" (WG14's n1247). So, `a` might be a better fit for a {fmt}/<format> specifier. Regards, Michel