Re: Beginners question: Compound types, how-to?

["J-P. Rosen" <rosen@adalog.fr>]

Le 01/11/2010 00:27, Yannick Duchêne (Hibou57) a écrit :
> This recall me a similar thing I get a little long time ago. I wanted to
> define a String type which I expected to hide the one of Standard, but
> always failed. I asked about it on a forum after I've checked the
> reference manual that time. I was thinking visibility rules was so that
> I was allowed to hide something from Standard, did not found anything
> stating the opposite, and finally never get an answer to this old question.
Standard is just the parent package of every compilation unit, and there
is no problem in *hiding* things declared in Standard with locally
declared in identifiers, regular visibility rules apply.

However, what confuses people is that use clauses are weaker than direct
visibility. Therefore, if your "string" type is defined in package P and
you "use P;", the String you get is Standard.String (directly visible),
not P.String (use-visible).

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           J-P. Rosen (rosen@adalog.fr)
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