Fortran: Fix some problems with SELECT TYPE selectors [PR104625].
2023-10-27 Paul Thomas <pault@gcc.gnu.org>
gcc/fortran
PR fortran/104625
* expr.cc (gfc_check_vardef_context): Check that the target
does have a vector index before emitting the specific error.
* match.cc (copy_ts_from_selector_to_associate): Ensure that
class valued operator expressions set the selector rank and
use the rank to provide the associate variable with an
appropriate array spec.
* resolve.cc (resolve_operator): Reduce stacked parentheses to
a single pair.
(fixup_array_ref): Extract selector symbol from parentheses.