G'day Christophe, On Wed, 16 Jul 2008 18:22:49 +0200 [EMAIL PROTECTED] wrote:
> Thanks for your answer. My pleasure. > > I guess writing > > a regular expression that says "export everything that does not > > start with a dot but do not export foo and bar" would be not > > trivial to write (at least not for me). > > The NAMESPACE created by package.skeleton contain a single line : > > exportPattern("^[[:alpha:]]+") > > I guess that it is what you just say... Not really. :) The regular expression "^[[:alpha:]]+" matches, as far as I know, all objects that have one or more alphabetic character at the beginning. The "Writing R Extensions" manual suggests "the directive exportPattern("^[^\\.]") exports all variables that do not start with a period." As far as I can tell, both these instructions have more or less the same effect (assuming that there are no objects with non-standard names in your package; and I am not enough of an R language lawyer to know what would happen in such a case). I was commenting on your classification as: > - some fonction will be "accessible" (regular function) > - some function will be "hidden" (function starting with .) > - some function will be "forbiden" (function not in namespace) Say, you have "accessible" functions called fubar, rabuf, main and something.incredible.useful, some hidden functions whose name start with a . and "forbidden" functions (i.e. not exported) with names foo and bar. (Though, as I commented earlier, it is practically impossible to implement "forbidden" functions, users can always access them if they want using ":::".) Both of the directives above would export fubar, rabuf, main, something.incredible.useful, foo and bar. So my challenge was to come up with a regular expression for exportPattern that says "export everything that does not start with a dot but do not export foo and bar", i.e. a regular expression that would only export the "accessible" functions. HTC. Cheers, Berwin ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.