From: Ron House <house AT usq DOT edu DOT au>
Newsgroups: comp.lang.c++,comp.os.msdos.djgpp
Subject: Re: STL broken?
Date: Tue, 05 Dec 2000 05:41:59 +0000
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Bart Kowalski wrote:
> 
> > An example of a line it won't compile is:
> >
> > vector<vector<int> > m;
> >
> > as found on page 836 of Stroustrup.
> 
> You forgot the namespace qualifier. See chapter 8 of the same book.

Oops! So did Stroustrup. (See all examples of the STL between pp1-900.) 
:-)

Seriously, no, that doesn't fix it. Besides, the error is not a simple
undeclared identifier, but a series of messages referring to lines deep
in the STL code:

d:/djgpp/lang/cxx/concept_checks.h: In function `static void
_Assignable_concept_specification<vector<int *,allocator<int *> >
>::_Assignable_requirement_violat
ion(vector<int *,allocator<int *> >)':
d:/djgpp/lang/cxx/stl_vector.h:159:   instantiated from
`vector<vector<int *,allocator<int *> >,allocator<vector<int
*,allocator<int *> > > >'
t.cpp:3:   instantiated from here
d:/djgpp/lang/cxx/concept_checks.h:530: use of parameter from containing
function
d:/djgpp/lang/cxx/concept_checks.h:389:   `int * __a' declared here
d:/djgpp/lang/cxx/concept_checks.h:531: use of parameter from containing
function
d:/djgpp/lang/cxx/concept_checks.h:389:   `int * __a' declared here
d:/djgpp/lang/cxx/concept_checks.h:532: use of parameter from containing
function
d:/djgpp/lang/cxx/concept_checks.h:389:   `int * __a' declared here
d:/djgpp/lang/cxx/concept_checks.h:532: use of parameter from containing
function
d:/djgpp/lang/cxx/concept_checks.h:389:   `int * __a' declared here
d:/djgpp/lang/cxx/concept_checks.h:533: use of parameter from containing
function
d:/djgpp/lang/cxx/concept_checks.h:389:   `int * __a' declared here
d:/djgpp/lang/cxx/concept_checks.h:533: use of parameter from containing
function
d:/djgpp/lang/cxx/concept_checks.h:389:   `int * __a' declared here

Adding or removing "std::", or inserting "using namespace std" changes
the error not one iota. As far as I can tell, any declaration of the
form: "a<b<c> > d;", where a and b are STL containers, fails to compile
no matter what you do with namespaces.

-- 
Ron House     house AT usq DOT edu DOT au
              http://www.sci.usq.edu.au/staff/house

A rose grows in the Earth's good soil.