Hi everyone! Just curious, does anybody know when clojure/clojurescript with spec/schema and spec/select will be released? I like this idea and want to try it 🙂

We have not started developing it yet, so not soon :)

what is generally preferred in specs? (s/nilable (s/or ...) vs (s/or :nil nil? …) when enumerating alternatives

the first is perf optimized

thanks

it might also be more robust, since some predicates can crash on nil

the generator for nilable is also intentionally unbalanced so it only produces nils 10% of the time

whereas the latter will be 1/n where n = # of options

can something similar be said about s/alt vs s/or in a regex?

not sure what you mean. do you mean nilable vs alt on nil?

if so, then that’s a different situation as s/nilable is not a regex and won’t compose in the same way as s/alt with other regex ops

no sorry, (s/cat :foo int? :x (s/alt ...)) vs s/or instead of alt

so independent of nil

I’m looking for an argument other than “alt belongs in regex”

s/alt is a regex op and composes with other regex ops to describe a single sequential structure

s/or is not a regex op

so acts as an independent value

sometimes the spec for :x can be taken apart and then it only makes sense to do it with or to make it re-usable on a single value

it depends here on what … is

right, … can contain other regex specs

in some cases, there is no perceptible difference

so, it depends then

there are cases where you might want s/alt and some where you might want s/or

if you’re describing alternatives of the sequential structure, then probably s/alt

if you’re describing alternate value sets that occur at a particular point in the structure, then probably s/or

usually the s/alt case will contain more regex ops inside the … whereas the s/or will not

clear, thanks!