[Bug c++/108317] dependent vector field is not causing field of this not to be found for fold expression inside a if constexpr block

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108317

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|dependent vector field is   |dependent vector field is
                   |not causing this to be      |not causing field of this
                   |captured for fold           |not to be found for fold
                   |expression inside a if      |expression inside a if
                   |constexpr block             |constexpr block

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Simple workaround is to do:


          if constexpr(I)
          {
            r.v_[I] = c + this->v_[I] + (I < M ? o.v_[I] : T{});
            c = c ? r.v_[I] <= this->v_[I] : r.v_[I] < this->v_[I];
          }
          else
          {
            c = (r.v_[I] = this->v_[I] + o.v_[I]) < this->v_[I];
          }