Re: Visibility of package within package

[Chad Bremmon <chad.bremmon@comm.hq.af.mil>]

Tucker Taft wrote:
> 
> Erik Masella (emasella@mtl.marconi.ca) wrote:
> 
> : Could anybody explain to me why the following will not work:
> 
> : with Generic_Pkg;
> : package A_Pkg is
> :    package B_Pkg is new Generic_Pkg(...);
> : ..
> : end A_Pkg;
> 
> : --------------------------------
> 
> : with A_Pkg;
> : package body C_Pkg is
> :    procedure Init is
> :    begin
> :       A_Pkg.B_Pkg.Do_Something(...);
> :    end Init;
> : end C_Pkg;
> 
> : ==> Why isn't B_Pkg visible within C_Pkg?  From what I understand,
> : "Software Engineering with Ada" from Booch (2nd ed.) says at p.383 that
> : this is possible (but he did not use generics).
> 
> : I'd greatly appreciate some insight into this.
> 
> Your code looks OK, but it is hard to be sure without a complete
> example, since we don't know what is inside "Generic_Pkg".  When
> you have mysteries like this, it is most useful to include an
> actual listing with error messages from the compiler.  Surprisingly
> often, there is some other problem than the one you first suspect.
> 
> In any case, it is possible that the compiler has a bug, but your
> example is so simple and straightforward that it seems more likely
> that something else is wrong.

Don't you still have to with in "With A_Pkg.BPkg;" inside of your C_Pkg ?

Chad
> 
> : Erik Masella
> : emasella@mtl.marconi.ca
> 
> -Tucker Taft   stt@inmet.com   http://www.inmet.com/~stt/
> Intermetrics, Inc.  Cambridge, MA  USA