[Gretl-devel] Re: different degrees of lazy evaluation

On Sat, Jan 14, 2023 at 4:33 AM Sven Schreiber <sven.schreiber(a)fu-berlin.de&gt; wrote: > Hi, sometimes I was under the impression that hansl supports lazy evaluation of boolean expressions, and sometimes I thought that no, it doesn't. And turns out I was right because it seems to depend. Consider this: > > <hansl> > > clear # neither a nor b exist > eval 1==2 && a==b # lazy works, FALSE no matter what a or b > eval 1==1 || a==b # lazy fails, even though it's always TRUE > > </hansl> Ah, good catch. As opposed to "&&", in the case of "||" only half of the apparatus needed to support lazy evaluation was in place. The other half is now added in git.