[Dune-devel] dune-common update seems to cause error in my ParMetis routine

[Aleksejs Fomins]

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Hey Jö,

I noticed it as well just now. I have to rewrite a lot, but hopefully that will improve the resistance of the code to future bugs.

Thanks a lot!
Aleksejs



On 26.01.2016 14:13, Jö Fahlke wrote:
> Am Tue, 26. Jan 2016, 11:56:05 +0100 schrieb Aleksejs Fomins:
>> Date: Tue, 26 Jan 2016 11:56:05 +0100
>> From: Aleksejs Fomins <aleksejs.fomins at lspr.ch>
>> To: "dune-devel at dune-project.org" <dune-devel at dune-project.org>
>> Subject: Re: [Dune-devel] dune-common update seems to cause error in my
>>  ParMetis routine
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>> Hey Jö,
>>
>> Thanks for your suggestion. I have tried to do as you say, and I attach the preprocessor output.
>>
>> If you search the text for "real_t", you find it is defined once in metis.h
>>
>> /opt/extlib/parmetis/4.0.3/openmpi/1.10.0/gcc/5.2.0/include/metis.h:120:17
>>    typedef float real_t;
>>
>> and once in Dune typetraits
>>
>> /home/fomins/gitwork/hades-lspr-ag/dune-common/dune/common/typetraits.hh:565:55
>>  using real_t = typename FieldTraits<Type>::real_type;
>>
>> I am not sure if I am reading the preprocessor output correctly, but, as far as I can tell, the typetraits definition is inside namespace Dune and metis definition is not inside any namespace. And yet the compiler complains about ambiguous definition of real_t when reading metis.h.
> 
> Hi!
> 
> The problem is a
> 
>   using namespace Dune;
> 
> in global scope.  See near line 55
> of "/home/fomins/gitwork/hades-lspr-ag/hades/basisfunctions/htvfe.hh" (and
> there may be more instances).  Shame on whoever put that into a header file
> ;).
> 
> Regards,
> Jö.
> 
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