From: pjb@... (Pascal J. Bourguignon)
Date: 2009-01-31T18:55:03+09:00
Subject: Re: global generator of unique symbols

Thomas Hafner <thomas@faun.hafner.nl.eu.org> writes:

> Hello,
>
> is there a global generator of unique symbols? See article
> <r98456-qlb.ln1@faun.hafner.nl.eu.org> why that can be needed. There I
> have defined myself a generator, but that's no real solution: if
> software is going to be put together from different libraries, only
> one common generator should be used by all software parts to prevent
> symbol clash.
>
> With ``generator of unique symbols'' I mean: the first time since
> program start it will generate any symbol. Any other time it will
> generate a symbol that differs from all already generated symbols.
>
> Regards
>   Thomas


(@@gensym_counter = 0)

(def gensym(base = "com_informatimago_ruby_g")
   (@@gensym_counter = (@@gensym_counter + 1))
   ((base + (@@gensym_counter . to_s)) . to_sym)
end)

(gensym)
--> :com_informatimago_ruby_g5


You could use org_eu_nl_hafner_faun in your symbols, and bet nobody
else will use that prefix.


-- 
__Pascal Bourguignon__