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:
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.
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.