c++/8778: ICE on illegal initialization of non-integral static in-class constant

[Wolfgang Bangerth]

Gaby, Volker,

let's settle this matter:


> | > ------------------------snip here----------------------
> | > template <int n> struct A
> | > {
> | >     static const int i[] = { 1, 2 };       // works
> | > };
> 
> If this compiles with GCC then that is a compiler bug.  The program
> construct is invalid.
> 
> [...]
> 
> | So maybe we can meet in the middle: "The code is illegal based on the C++ 
> | standard, but is accepted as a gcc extension"?
> 
> I doubt that is an extension.

I just filed report PR 8797 stating that the above syntax should not be
accepted, or alternatively that the "extension" should be documented in
the manual. I guess I lean towards the first alternative. Note also that
using -pedantic yields a _warning_, not an error on the code above, so I
guess having a separate report is justified.

Regards
  Wolfgang

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Wolfgang Bangerth              email:           bangerth@ticam.utexas.edu
                               www: http://www.ticam.utexas.edu/~bangerth