On 10/21/18 4:39 PM, Ed Smith-Rowland wrote:
All,
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. (We also
might wait 'till it actually passes).
I don't mind putting it in before it passes so long as you keep track of
the proposal's progress -- I just discovered that the string UDL
template proposal we implemented for C++14 wasn't actually accepted, so
we need to pedwarn about it.
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.
Opinions?
That seems reasonable to me, but Joseph will need to weigh in about C.
Jason
