Getting Instance of calling class
staschuk at telusplanet.net
Tue Jun 17 18:24:32 CEST 2003
Quoth Thomas Güttler:
> I have a function called _() which prints
> strings according to the language of the user.
> I don't want to give this method the object which
> holds the language information every time I call it.
> How can I access the calling object?
I'm not sure what you mean by "the calling object". sys._getframe
provides frames from further up the call stack, but I'm not sure
how this relates to what you want to do.
It sounds a little like you want a dynamically scoped environment
containing (possibly among other things) localization information
for the current user. I suppose you could implement such a thing
by trolling through stack frames, but this seems a bit hackish.
An alternative approach would be to pass _ into each function
which needs to produce output. _ could be a closure,
# return s in language lang
for example. This avoids passing the language to _, but adds
passing _ around. Does this help at all?
Steven Taschuk "The world will end if you get this wrong."
staschuk at telusplanet.net -- "Typesetting Mathematics -- User's Guide",
Brian Kernighan and Lorrinda Cherry
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