Re: [Openexr-devel] C++11, 'throw', etc.

[Werner Benger]

It should be noted that dynamic expressions are actually forbidden in 
C++17, so OpenEXR does no longer compile with GCC 7.1 when std C++17 is 
enabled. The highest C++ version that can be used to compile it is 
C++14, where it's still just a warning, while in C++17 it's an error. It 
would be good to have OpenEXR at least compilable in C++17.  Major C++ 
libraries such as QT are using C++11 nowadays, so it seems pretty safe 
to go beyond C++03 for modern applications, a lot of things are indeed 
much easier.

     Werner


On 10.08.2017 00:20, Larry Gritz wrote:
> In a test compile with gcc 7, I get lots of errors of the following ilk:
>
> /home/travis/build/lgritz/openexr/IlmBase/Imath/ImathVec.h:228:34: warning: 
> dynamic exception specifications are deprecated in C++11 [-Wdeprecated]
>       const Vec2 & normalizeExc () throw (IEX_NAMESPACE::MathExc);
>                                    ^~~~~
>
> I can disable this particular warning, of course, but it's worth noting that 
> the OpenEXR code base is not C++11 compliant. But in addition to using some 
> C++03 idioms that are deprecated in C++11, perhaps more importantly, the code 
> is not taking advantage of new features such as move semantics, constexpr, 
> nothrow, and others. For the Imath classes especially, using some of these may 
> actually confer a performance benefit.
>
> I feel kind of bad pointing this out while not really having the time at the 
> moment to code up and submit an actual patch myself, but I thought I'd at least 
> open the topic and see where the community stands on the issue of how and when 
> to upgrade to C++11 and if it's important for modern OpenEXR to continue to 
> support C++03. For point of reference, the VFX Reference Platform 
> [http://www.vfxplatform.com/] dictated C++11 for 2016 and 2017, and will be 
> C++14 for 2018.
>
>         -- lg
>
> --
> Larry Gritz
> address@hidden
>
>
>
>
>
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--
___________________________________________________________________________
Dr. Werner Benger                Visualization Research
Center for Computation & Technology at Louisiana State University (CCT/LSU)
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