On Fri, Jan 31, 2020 at 7:20 PM Linus Björnstam <linus.bjorns...@veryfast.biz> wrote: > I don't really understand your question. With defmacro and syntax-case you > can run arbitrary code. If you just output code that does module-define! that > won't be run until runtime, and thus you cannot depend on the result of that > module-define! during expansion. You can however wrap it in an eval-when to > solve that issue. That allows you to specify when code gets run. With > module-define! I personally find it all a bit icky, but I usually stay as far > away from phasing as I can :)
eval-when looks like it might be a solution to the puzzle , but honestly, the doc at https://www.gnu.org/software/guile/manual/html_node/Eval-When.html has me mystified. When I run the example through guile 2.2 and display *compilation-date*, I get a different answer each time. Shouldn't it be a fixed timestamp (of when the compile happened?) [hanwen@localhost lilypond]$ guile2.2 e.scm ;;; note: source file /home/hanwen/vc/lilypond/e.scm ;;; newer than compiled /home/hanwen/.cache/guile/ccache/2.2-LE-8-3.A/home/hanwen/vc/lilypond/e.scm.go ;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0 ;;; or pass the --no-auto-compile argument to disable. ;;; compiling /home/hanwen/vc/lilypond/e.scm ;;; compiled /home/hanwen/.cache/guile/ccache/2.2-LE-8-3.A/home/hanwen/vc/lilypond/e.scm.go Fri Jan 31 20:15:57+0100 2020 [hanwen@localhost lilypond]$ guile2.2 e.scm Fri Jan 31 20:15:58+0100 2020 [hanwen@localhost lilypond]$ guile2.2 e.scm Fri Jan 31 20:16:00+0100 2020 -- Han-Wen Nienhuys - hanw...@gmail.com - http://www.xs4all.nl/~hanwen
