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On 30.05.10 06:41, Warp wrote:
> Thorsten Froehlich<tho### [at] trf de> wrote:
>> Then you should file a bug report with Microsoft because their library (and
>> probably the compiler as well) enables non-standard behavior by default.
>> Supporting draft standard features by default is extremely poor practice, or
>> more precisely, a serious product defect. But it is of course typical M$
>> behavior to pull such stunts and forget an off-switch, so you may have to
>> dig for it or patch your system library by hand<sigh>
>
> I'm curious to know what your excuse will be when the C++0x standard is
> ratified and POV-Ray will stop compiling on *standard* compilers.
POV-Ray will continue to compile on all compilers that are ISO C++ 1998 and
2003 standard compliant. Academically designing for an unknown future
standard would mean no program would ever be written as standards can change
everything over time, and _do_ even *drop* features!
>> POV-Ray's usage of C++ is fully ISO standard compliant.
>
> "Standard compliant" and "good practice" are two different things.
No, good practice is a superset of standard compliant.
> Avoiding "using namespace std;" is a good practice because it avoids
> precisely the kind of problems as presented here.
No, even a fine grain use of namespace std will not solve the problem. You
end up having to fully qualify all names, which could not be more pointless
- it completely defeats the purpose of namespaces being meant as a
simplification, not a complication, for the programmer.
> Exactly what would be the problem in avoiding "using namespace std;" and
> using the 'std::' prefixes? It's not like POV-Ray needs to be compilable in
> 20-years-old compilers anylonger (it requiring boost and all).
Formally the current standard-compliant way of accessing the std smart
pointers is by accessing namespace std::tr1. The std qualifiers just add a
lot of completely useless clutter to the code, seriously deteriorating
maintainability. As nice as an academic code quality is, it is irrelevant in
practice.
Thorsten
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