On Tue, Nov 16, 2021 at 10:28 AM Edward Welbourne <edward.welbou...@qt.io> wrote: > > On Sun, Nov 14, 2021 at 8:42 PM Paul Smith <psm...@gnu.org> wrote: > > It's even possible to allow $(compare <lhs>,<rhs>) with no other > > arguments and say that if they are equal then it expands to the value, > > else it expands to the empty string, to give a very short-circuited > > equality statement. > > I should point out one bug in that: if the two parameters are equal > *but empty* you're going to mistake that for them being different.
Empty strings will not be accepted as <lhs> or <rhs>, since those arguments are parsed as numbers. A case like $(compare +0,-0) would expand to "0" (without quotes), which is how the value would be formatted by the standard C routines. I don't think there is a bug here. Regards, - Jouke
