On Sun, Oct 21, 2018 at 04:39:30PM -0400, Ed Smith-Rowland wrote:
> This patch implements C++2a proposal P0330R2 Literal Suffixes for ptrdiff_t
> and size_t*. It's not official yet but looks very likely to pass. It is
> incomplete because I'm looking for some opinions. 9We also might wait 'till
> it actually passes).
>
> This paper takes the direction of a language change rather than a library
> change through C++11 literal operators. This was after feedback on that
> paper after a few iterations.
>
> As coded in this patch, integer suffixes involving 'z' are errors in C and
> warnings for C++ <= 17 (in addition to the usual warning about
> implementation suffixes shadowing user-defined ones).
>
> OTOH, the 'z' suffix is not currently legal - it can't break
> currently-correct code in any C/C++ dialect. furthermore, I suspect the
> language direction was chosen to accommodate a similar addition to C20.
>
> I'm thinking of making this feature available as an extension to all of
> C/C++ perhaps with appropriate pedwarn.
GCC now supports -std=c++2b and -std=gnu++2b, are you going to update your
patch against it (and change for z/Z standing for ssize_t rather than
ptrdiff_t), plus incorporate the feedback from Joseph and Jason?
Jakub
