I'm glad, I didn't expect my comment to be so helpful :) For those curious, I have several examples of this pattern in Rebellion. The following constructs are all just structs of functions:
- Comparators <https://docs.racket-lang.org/rebellion/Comparators.html> - Converters <https://docs.racket-lang.org/rebellion/Converters.html> - Equivalence relations <https://docs.racket-lang.org/rebellion/Equivalence_Relations.html> - Reducers <https://docs.racket-lang.org/rebellion/Reducers.html> - Transducers <https://docs.racket-lang.org/rebellion/Transducers.html> On Monday, November 9, 2020 at 2:03:52 AM UTC-8 unlimitedscolobb wrote: > On Monday, November 9, 2020 at 1:51:05 AM UTC+1 Kieron Hardy wrote: > >> >> > On Nov 8, 2020, at 2:58 PM, Hendrik Boom <[email protected]> >> wrote: >> > >> >> On Sun, Nov 08, 2020 at 12:47:11PM -0800, unlimitedscolobb wrote: >> >> The idea of having structs whose fields contain functions has never >> occurred to me ... >> > >> > Historical note: >> > >> > I first encountered structures containing function in the source code >> for >> > OS/360 way back in the late 60's. In assembler. >> > >> > Structures with fields containing functions has never occurred to me >> before, either, at least not in those terms. >> >> However isn’t that exactly one of the key design principles behind how >> device-drivers are implemented and installed into an OS? And also how >> classes and objects were initially added to C as some pretty hairy #define >> macros and function pointers? >> >> This design pattern insight would have been beneficial to me sooner - >> doh! >> >> > I completely share your feelings Kieron. In fact, I have already defined > structures with functions in the fields multiple times and in many > programming languages, but I have never thought how this pattern could be > used to implement generic-like functionality :D > > Thank you Hendrik for the historical note! > > - > Sergiu > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/15dc0d41-dbd2-488a-9113-31c284443ce4n%40googlegroups.com.
