My macro is was based on the |> pipeline from f# and on the cut macro. I then changed the syntax after seing the pipeline macro in rackjure, which is based on clojure's macros. In the beginning I wanted to do destructuring as well to allow to destructure lists and passed it as numbered arguments and such. I had a syntax-case version that did all that, but I never used that, so I wrote a syntax-rules macro instead so that I could bring it with me if I ever switched schemes (from chez). I switched to chicken and then guile and brought the macro with me.
If you want to use it, I also provide a right-inserting macro as well: (~>> ...). The license is more or less "just don't remove this copyright notice from the source", so feel free :D -- Linus Björnstam On Tue, 9 Jul 2019, at 11:58, Chris Vine wrote: > On Tue, 09 Jul 2019 11:40:02 +0200 > Linus Björnstam <linus.inter...@fastmail.se> wrote: > > Sorry, I didn't see that macro. I was referring to my macro that Erik > > linked to [1], which is a syntax rules macro that also allows for <> > > argument placeholders: > > > > (~> 1 1+ (/ 10 <>) iota (+ <...>)) => 10 > > > > It defaults to left insert, so > > > > (~> 10 (/ 2)) => 5 > > > > but also (like the syntax rules macro i posted) also supports functions > > without parents as you can see in the first example. > > > > That's what I get for trying to.follow the discussion in an unthreaded > > mobile app :) > > > > [1]: https://bitbucket.org/bjoli/guile-threading-macros/src/default/ > > I thought your module/library was impressive. My little macro (as it > now turns out, defective in hygiene, although it has served me well for > some time) was something I use frequently because I like the pipeline > idiom. It inserts to the right only, because that is what I am used > to: it sort-of imitates the reverse application of a partially applied > curried function. I think your module is based on clojure macros, > about which I know little. >
