[Bug c++/68891] must use a typedef to declare a conversion to 'double (&)[3]'

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68891

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Keywords|                            |accepts-invalid
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-11-04

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:

struct V
{
  (&operator double ())[3] {
    return v;
  }
  double v[3];
};

static void Print( const double (&)[3] )
{
}

int main()
{
  V v = {0,1,2};
  Print( v );
}

EDG accepts it too. MSVC says:

error C2586: incorrect user-defined conversion syntax: illegal indirections