On Mon, Jul 28, 2014 at 9:11 PM, Tomas Hlavaty <t...@logand.com> wrote: > > I can't make sense of what you are trying to achieve. Why do you want > to use transient symbols? Why not use normal interned symbols? How > does your use case differ? Do you have a simple example?
Suppose you embed a DSL in Picolisp, like this: (de Afficher (msg) (println msg)) Where «Afficher» is the French for «Display». Now here is a simple program: (Afficher "Hello!") When run it with the definition above, the message "Hello!" is displayed. Now I want to export the program to XML to build a blocks configuration for Blockly. An example built (then tweaked by hand) with: https://blockly-demo.appspot.com/static/apps/code/index.html <block type="Afficher"> <value name="TEXT"> <block type="text"> <field name="TEXT">Hello!</field> </block> </value> </block> Consider that Afficher is not the only command of the language. There is a kind of «concatenate», a «read»… The Lisp syntax is marvellous because the data I need to translate (the program) is also source code (well, it was since the beginning!). All I need is to reprogram my DSL like this: (de Afficher (msg) (pack "<block type=\"Afficher\"><value name=\"TEXT\">" msg "</value></block>")) But I need transient symbols to spontaneously have the value: <block type="text"><field name="TEXT">*****</field></block> Where ***** is the name of the transient symbol. I could assign each transient the right value, but a bit of magic would save time. Is it better? chri -- http://profgra.org/lycee/ (site pro) http://delicious.com/profgraorg (liens, favoris) https://twitter.com/profgraorg http://microalg.info -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
