On Fri, Dec 16, 2016 at 10:28 AM, Pavel Stehule <pavel.steh...@gmail.com> wrote:
> 2016-12-16 18:21 GMT+01:00 David G. Johnston <david.g.johns...@gmail.com>: > >> On Fri, Dec 16, 2016 at 9:55 AM, Robert Haas <robertmh...@gmail.com> >> wrote: >> >>> >>> If the expected committed patch set includes #5 then this becomes a >> matter for reviewer convenience so never mind. But if its at all possible >> for #5 to be punted down the road incorporating the eventual "not var" and >> "not(var)" syntax into #1 as a kind of shim would seem desirable. >> > > why do you need special operator for negation? there is only one use case. > It can be solved by \if_not > Not following the thread that closely and the section Robert quoted didn't include "\if_not" as a syntax option. I figured the idea was to limit the number of backslash commands and leave the power in the expression evaluation. David J.