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Re: namespace collision [bug]

• To: mathgroup at smc.vnet.net
• Subject: [mg68715] Re: namespace collision [bug]
• From: albert <awnl at arcor.de>
• Date: Thu, 17 Aug 2006 04:18:22 -0400 (EDT)
• References: <ebujoc$6k9$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi Chris,

> As far as I know, a named pattern created inside the A`Private`
> context should not interfere with the definition of a symbol with the
> same name from B`. Will someone verify this as a bug? Will someone
> please provide a workaround?

No Bug, no workaround needed. Just make sure to sue Begin["`Private`"]
instead of Begin["Private`"] (note the leading backquote). Only when using
leading backquotes symbols are created in "A`Private`" resp. "B`Private`".
Without it both symbols are created in "Private`" which in your case leads
to the interference you are seeing...

hth, albert
 
> In[1]:=
> BeginPackage["A`"];
> funA::usage="";
> Begin["Private`"];
> funA[funB_]:=funB!;
> End[];
> EndPackage[];
> BeginPackage["B`"];
> Off[General::spell1];
> funB::usage="";
> funC::usage="";
> Begin["Private`"];
> funB[_]:="you called funB";
> funC[_]:="you called funC";
> End[];
> EndPackage[];
> 
> In[16]:=
> funB[5]
> 
> Out[16]=
> funB[5]
> 
> In[17]:=
> funC[5]
> 
> Out[17]=
> you called funC
> 
> In[18]:=
> $Version
> 
> Out[18]=
> 5.2 for Microsoft Windows (June 20, 2005)
>