Re: Help porting someone else's macro from 4 to 5.
Andrew Mack writes: > Hello all, I'm attempting to port the sdl-mixer egg (originally by > Christian Kellermann) from 4 to 5. I think I've made most of the > necessary changes, but I'm running into a bit of an issue and would > greatly appreciate some help troubleshooting. Hi, Andrew! > > I'm a bit new to Chicken and lisp in general, and while I feel I have a > decent understanding of regular macros the er- and ir-macro-transformer > procedures are still eluding me somewhat. In sdl-mixer's chicken 4 > source, we have the macro > > (module sdl-mixer-lolevel > > (import ... srfi-1 ...) > > ... > > (define-syntax --sdl-flags > (lambda (e r c) > `(,(r 'begin) > ,@(append-map (lambda (str) ^^ append-map is being called during syntax expansion time here. So, instead of (import srfi-1) you need (import-for-syntax srfi-1). > (let* ((sym (string->symbol str)) > (psym (string->symbol (string-append "-" str > `((,(r 'define-foreign-variable) ,psym unsigned-integer ,str) > (,(r 'define) ,sym ,psym > (cdr e) > > ... > > ) ; end module > > Looking through various chicken documentation, my first assumption was > to wrap the lambda argument to define-syntax in an er-macro-transformer > call. However this does not recognize append-map (of course defined in > srfi-1) as bound. I thought that it might also need to be renamed with > (r 'append-map) but this also did not work. > > Since I am new to Chicken, I assume its a misunderstanding on my part of > what is necessary, but I cannot figure out where to go from here. So > first of all, is my assumption that I need an er-macro-transformer > correct, or am I barking up the wrong tree? Second, after resolving the > first question what is the next step I need to take? Any help would be > greatly appreciated. You're correct in that you need to use er-macro-transformer from (chicken syntax). Alternatively you can use ir-macro-transformer: (define-syntax --sdl-flags (ir-macro-transformer (lambda (e i c) `(begin ,@(append-map (lambda (str) (let* ((sym (string->symbol str)) (psym (i (string->symbol (string-append "-" str) `((define-foreign-variable ,psym unsigned-integer ,str) (define ,sym ,psym (cdr e)) > > Thanks in advance, > > Andrew Mack
Help porting someone else's macro from 4 to 5.
Hello all, I'm attempting to port the sdl-mixer egg (originally by Christian Kellermann) from 4 to 5. I think I've made most of the necessary changes, but I'm running into a bit of an issue and would greatly appreciate some help troubleshooting. I'm a bit new to Chicken and lisp in general, and while I feel I have a decent understanding of regular macros the er- and ir-macro-transformer procedures are still eluding me somewhat. In sdl-mixer's chicken 4 source, we have the macro (module sdl-mixer-lolevel (import ... srfi-1 ...) ... (define-syntax --sdl-flags (lambda (e r c) `(,(r 'begin) ,@(append-map (lambda (str) (let* ((sym (string->symbol str)) (psym (string->symbol (string-append "-" str `((,(r 'define-foreign-variable) ,psym unsigned-integer ,str) (,(r 'define) ,sym ,psym (cdr e) ... ) ; end module Looking through various chicken documentation, my first assumption was to wrap the lambda argument to define-syntax in an er-macro-transformer call. However this does not recognize append-map (of course defined in srfi-1) as bound. I thought that it might also need to be renamed with (r 'append-map) but this also did not work. Since I am new to Chicken, I assume its a misunderstanding on my part of what is necessary, but I cannot figure out where to go from here. So first of all, is my assumption that I need an er-macro-transformer correct, or am I barking up the wrong tree? Second, after resolving the first question what is the next step I need to take? Any help would be greatly appreciated. Thanks in advance, Andrew Mack
Re: Multi-platform app development options for chicken?
Hi Matt, this is what I currently do to this end: Since a while I'm using lambdanative. It makes it easy for me to build APKs. Supports iOS too, though I never tried. I make a Chicken build for it (not avail upstream but I'll make it avail if anyone would like it). Chicken running in a pthread talking to the Gambit pthread from lambdanative via abstract socket. To make it easier to control native Android GUI elements, I ported the original JScheme (and very slightly extended it, e.g., to enable contructors to dispatch on argument types)[1]. The only thing I'm currently really, really missing is a way to have select(2)able fd's for pthread-to-pthread communication under Windows. My verdict: great it all you need is to quickly glue some GUI together. However: IUp is much more capable, but also harder to use. Complex user interfaces I rather do as Web applications. The server in Chicken on the loopback interface the GUI part (on Android) is the webkit widget from Android, controled via LNjScheme. (On Linux/Windows it starts a Webbrowser. iOS I did not tryso far.) Best /Jörg [1]: https://github.com/part-cw/lambdanative/tree/master/apps/DemoAndroidLNjScheme On Sun, 19 Jan 2020 11:57:26 -0700 Matt Welland wrote: > Currently I've got windows and Linux covered and I'm very happy with > the Chicken+IUP combo (although getting that to work on old platforms > with Chicken 5 is a challenge). However I need to try again for > Android. The SDL build worked and has great potential for games but > not so much for regular apps. > > My thought is to learn Javascript and ramp up on something like > Native ( https://www.nativescript.org) which begs the question, is it > feasible to use Chicken as part of a Native app such that the core of > the app is Chicken and the interface is Javascript/Native? > > I'm looking for opinions and comments from Chicken users as to how you > would approach this problem. > > Thanks. > -- > Complexity is your enemy. Any fool can make something complicated. > It is hard to keep things simple. - Richard Branson.
