On Wed, 29 Apr 2009 20:00:07 +0200 luigi scarso <luigi.sca...@gmail.com> scribit:
> On Wed, Apr 29, 2009 at 6:46 PM, R. Bastian <rbast...@free.fr> wrote: > > > On Wed, 29 Apr 2009 17:55:05 +0200 > > luigi scarso <luigi.sca...@gmail.com> scribit: > > > > > > > > > > > > > > May be that ConTeXt is not a 'context free language' ;-) > > > > than it will be difficult to express something in a BNF grammar > > > > http://en.wikipedia.org/wiki/Backus-Naur_form. > > > > > > > hmm. > > > Context is a macro package in TeX language which is Turing Complete. > > > > > > > > > > But if (ConTeXt == formal_language), it should be possible to > > > > develop TEXT, NUMBER, DIMENSION, REFERENCE, etc > > > > and also to add examples for "[optional user data]". > > > > > > > hmm > > > I'm not sure that ConTeXt == TeX (but it seems YES) , > > > I'm nor sure that TeX is a context free language too, > > > in the sense that I never see a BNF grammar of TeX . > > (chap.24-26 of the Texbook are embryos of a grammar, but they are not > > usable > > like the grammar of Pascal or Python) > > > I suspect that TeX is not a cfl . > > > > > > Anyway, > > > lpeg can make the thing easier > > > > > > -- > > > luigi > > > > > > > > I think that something user-friendly could be do in a cooperative wiki (in > > the between, i found > > http://texshow.contextgarden.net/) beginning with > > > > CONTEXT_SOURCE ::= PREAMBLE "\starttext" TEXT "\stoptext" | CONTEXT_SOURCE > > TEXT ::= STARTSTOPS | SETUPS | DEFINES | OTHERS [ TEXT > > > > and so on. > > > Consider that one can always make some dirty tricks in PREAMBLE to render > useless > "\starttext" > or "\stoptext" > > To be general, i think > MY_CONTEXT_SOURCE ::= MACRO* END > > For example , let's try > $>context test > where > test.tex ::="\end" > or > test.tex ::="FOO\end" > > Are there any errors ? No > Is test.tex in {CONTEXT_SOURCE } ? No > Is test.tex in {MY_CONTEXT_SOURCE} Yes > so MY_CONTEXT_SOURCE includes CONTEXT_SOURCE > (of course > test.tex ::="\end""\starttext""\stoptext" is also in {CONTEXT_SOURCE } > ) I dont understand the sense of "\end\starttext" (I am simply seeking a layout system which works better than Latex). > > I think that a bnf or lpeg grammar is really useful for a sort of > standard-ConTeXt > or minimal-ConTeXt or light-ConTeXt > ie a ConTeXt to use as "reference" Exactly what I need : standard, minimal and light > but can be a bit hard to define > > -- > luigi ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
