Bug 49630 - g++ uses namespace std by default
g++ uses namespace std by default
Status: CLOSED NOTABUG
Product: Red Hat Linux
Classification: Retired
Component: gcc (Show other bugs)
7.1
All Linux
medium Severity medium
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Assigned To: Jakub Jelinek
David Lawrence
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Depends On:
Blocks:
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Reported: 2001-07-21 19:22 EDT by Wagner T. Correa
Modified: 2007-04-18 12:34 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2001-07-22 07:58:33 EDT
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Description Wagner T. Correa 2001-07-21 19:22:26 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.77 [en] (X11; U; Linux 2.4.3-12 i686)

Description of problem:
If you want to use an STL class, let's say std::vector, g++ does not
require you to write std::vector, even if you don't specify 'using
namespace std'.

How reproducible:
Always

Steps to Reproduce:
Compile the following with 'g++ -Wall -c':
#include <vector>
vector<int> v;


Actual Results:  The code compiles with no errors or warnings.

Expected Results:  g++ should have generated an error.

Additional info:
Comment 1 Michael Schwendt 2001-07-22 07:58:29 EDT
FWIW, this is not due to g++ but due to the included libstdc++ not being
entirely standards compliant. It is not libstdc++ v3 yet which will fix this
(hopefully). If you roll your own namespaces, those work.
Comment 2 Jakub Jelinek 2001-07-22 14:38:00 EDT
g++-2.96-RH, like all g++ compilers before it, default to
-fno-honor-std, ie. std namespace is treated specially.
This is because of libstdc++-v2 which is not namespace clean etc.
Grab g++3-3.0* rpms from rawhide if you're looking for a C++
compiler which will give you error for the above.

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