On Sun, Jan 4, 2009 at 10:01 AM, Carsten Dominik <domi...@science.uva.nl> wrote: > > On Jan 4, 2009, at 3:33 PM, Steven E. Harris wrote: > >> Carsten Dominik <carsten.domi...@gmail.com> writes: >> >>> Code references use special labels embedded directly into the source >>> code. Such labels look like "((name))" and must be unique within a >>> document. >> >> How does the parser know that, say, "((def))" is not a valid expression >> in the surrounding Lisp forms? Is it important that it be separated by >> space, or be the last token on the line? >> >> Trying to concoct a motivating example, consider a structure represented >> as nested lists: >> >> ,---- >> | '(a >> | ((b c) d) >> | (((e) f)) ((def)) >> | g) >> `---- >> >> Without knowing what the enclosing `quote' form means, how do know that >> "((def))" is not part of it? > > Hi Steven, > > good question, and the answer is that is does not know, > cannot know, because this is a feature that is supposed > to work for any kind of example, an the parser cannot > know all possible syntaxes :-) > > This idea is to make this work in a heuristic way, by using something > that is unlikely enough to occur in real code. > > You are right that what I am using might be too > dangerous for emacs lisp or other lisp dialects, and > it could also show up in other languages like C. > > What would be safer? > > <<name>> like the other Org-mode targets? That would make sense. > Does anyone know a language where this would be used > in real life? It would make it harder to write about > Org-mode, though. > > Or do we need another option, so that, if needed, we could switch do > a different syntax? > > Comments are very welcome. > > - Carsten
I think that is quote words in perl 6. @list = <<$this is a 'list' of 7 strings>> # in perl 6 is @list = qw/$this is a 'list' of 7 strings/ # in perl 5. It's looking like perl 6 will be a reality and that syntax is recommend in several places like hash dereferences. %hash<<bareword>> # look up bareword in %hash I can't remember enough off the top of my head, but I think <<name>> will play merry heck with common(?) perl 6 code. I can look up more examples if needed. Edd _______________________________________________ Emacs-orgmode mailing list Remember: use `Reply All' to send replies to the list. Emacs-orgmode@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-orgmode
