c++/100: Re: confusing name lookup diagnostic (cvs g++ 20000306)

["Martin v. Loewis" <martin at loewis dot home dot cs dot tu-berlin dot de>]

	Note: There was a bad value `rejects-legal-code' for the field `>Class:'.
	It was set to the default value of `sw-bug'.


>Number:         100
>Category:       c++
>Synopsis:       confusing name lookup diagnostic
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          analyzed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 12 00:56:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     scott snyder <snyder@fnal.gov>
>Release:        (cvs g++ 20000306)
>Organization:
>Environment:
>Description:
 Original-Message-Id: <200003090254.UAA61362@d0sgibnl1.fnal.gov>
 Date: Wed, 08 Mar 2000 20:54:21 CST


 hi -

 gcc (cvs version 2.96 20000306 on i686-pc-linux-gnu) gives a particularly
 confusing diagnostic for the following input (which i believe to be invalid).

 -- egcsbug9.cc -------------------------------------------------------------
 class CftCluster {};

 namespace d0track {
   typedef CftCluster CftCluster;
 }

 using namespace d0track;

 void foo () {
   CftCluster cftclus;
 }
 ----------------------------------------------------------------------------

 I think that this input is invalid because the reference to `CftCluster'
 is ambiguous -- it can be found in both the global and d0track namespaces.
 However, the diagnostic i actually get is:

 $ ./cc1plus -quiet egcsbug9.cc
 egcsbug9.cc: In function `void foo ()':
 egcsbug9.cc:10: `CftCluster' undeclared (first use this function)
 egcsbug9.cc:10: (Each undeclared identifier is reported only once
 egcsbug9.cc:10: for each function it appears in.)
 egcsbug9.cc:10: parse error before `;'


 Since the problem is too many declarations rather than none,
 this is rather confusing.

 thanks,
 sss

 [MvL - I think the code is well-formed, both definitions refer to the
  same entity]

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