[cfe-dev] clang issue with 'mutable' ?

[David Blaikie]

Interestingly GCC ToT (g++-tot (GCC) 4.9.0 20130829 (experimental)) rejects
this the same way Clang does, but 4.8.1 does not (it accepts it).


On Mon, Oct 21, 2013 at 6:17 AM, Stefan Seefeld <stefan at seefeld.name> wrote:

> Hello,
>
> I have just run into an issue with some C++ code that I could reduce to
> this case:
>
>   template <typename T>
>   struct wrapper
>   {
>     wrapper() : member() {}
>     mutable T member;
>   };
>
>   int main()
>   {
>     wrapper<int const> w;
>   }
>
> clang would raise the error "'mutable' and 'const' cannot be mixed",
> while the same compiles (and works !) fine with g++.
>
> (Please note that the above may not look very meaningful, but in the
> original case I extracted this from it definitely does :-) )
>
> Could someone please confirm that this is a clang bug, or otherwise
> explain if it is indeed illegal C++ ?
>
> Many thanks,
>                 Stefan
>
>
> --
>
>       ...ich hab' noch einen Koffer in Berlin...
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