Juerd writes: > Autrijus Tang skribis 2005-04-27 17:04 (+0800): > > I can certainly see a `is pure` trait on Perl 6 function that declares > > them to be safe from side effects. In a sense, `is const` also does that. > > `is pure` would be great to have! For possible auto-memoization of > likely-to-be-slow subs it can be useful, but it also makes great > documentation.
It's going in there whether Larry likes it or not[1]. There are so incredibly many optimizations that you can do on pure functions, it's not even funny. Haha. Er... [1] Of course if Larry doesn't like it (now _that's_ funny) then it will go in a module that will be mysteriously tied to Perl 6's guts. Luke
