Re: [Boost-users] Looping through variadic macro arguments

Subject: Re: [Boost-users] Looping through variadic macro arguments
From: Edward Diener (eldiener_at_[hidden])
Date: 2016-03-30 14:42:41

On 3/30/2016 4:35 AM, Florian Lindner wrote:
> Hey,
>
> I have integrated the code in our project now and it fails to compile
> with some older clang version.
>
> It compiles fine with clang++ 3.7.1 and g++ 5.3.0 on my arch machine as
> well as g++ 4.8.4 on our ubuntu server, but fails with clang++ 3.4 on
> this machine as well as the travis
>
> The complete compiler messages are at http://pastebin.com/HgjgCfsH it
> is mostly something like that:
>
> error: unknown type name 'BOOST_PP_IIF_0'
>    assertion( reinterpret_cast<Vector&>(*this).size()==toAssign.size() );
>
> The assertions code is at
> https://github.com/precice/precice/blob/develop/src/utils/assertion.hpp
>
> as well as all other code files.
>
> If you want to give it a try, you can clone the project and use
>
> clang++ -o
> build/debug-nopetsc-nompi/tarch/configuration/ConfigurationRegistry.o
> -c -Wall -std=c++11 -fPIC -Wsign-compare -g3 -O0 -DDebug -DAsserts
> -DPRECICE_NO_PETSC -DEIGEN_INITIALIZE_MATRICES_BY_NAN -DPRECICE_NO_MPI
> -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -Isrc -I/usr/include
> -I/usr/include/python2.7 -I/usr/include/python2.7/numpy
> src/tarch/configuration/ConfigurationRegistry.cpp
>
> (it's also included in the pastebin above)
>
> Do you have any idea?

Would you please post a complete example along with your command line as 
a Boost bug report for the preprocessor library ? That way I am more 
likely to take a look at it. My guess, without knowing the details of 
your example, is just a clang-3.4 bug which has been fixed in a later 
release but if your problem is easily reproducable I can add a test to 
the preprocessor tests, based on your example, which shows the clang-3.4 
bug. Currently my preprocessor tests using clang-3.4 do not show any 
problems so incorporating such a test showing a problem will be 
worthwhile for me.