> > What is "repl."? > > Read-Eval-Print Loop? You're absolutely right. I've always seen that capitalized (REPL) and didn't recognize it in lowercase. Perhaps too much Unix :-). (There's a big brouhaha in Scheme because revision 6 switches from case-insensitive to case-sensitive. I'm used to case-sensitive systems, including guile which is a case-sensitive Scheme, so it seemed perfectly sensible to me.)
> A little off-topic, seeking to understand Lisp macros a little better: > do complex macros tend to not compose well because they're expanded > preorder rather than evaluation order (postorder)? Actually, complex macros work just fine, as long as you stick to the Lisp convention that "operator is always named first in a list". As long as you do that, complex macros that reach deeply into their parameters will still work. But this is why infix operators have trouble - the operator is NOT first in an infix expression. By making this translation at read-time, complex macros work again. Of course, there's always a trade-off; if you translate at read-time, then precedence rules get tricky - you have to make sure that the correct precedence rules are enabled when you read a particular expression. If there are snippets at various levels in the same read-expression, that's REALLY tricky. My solution is chop the problem off at the knees: no precedence, so no problems. In my experimentation this actually works surprisingly well; the loss of precedence is not really a big deal in a vast number of circumstances. I'm actually really happy with the latest version of sweet-expressions; I think it is extraordinarily general, and experiments seem to suggest it produces really nice results WITHOUT special-casing, etc., etc. --- David A. Wheeler ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Readable-discuss mailing list Readable-discuss@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/readable-discuss
