Paul Thomas fdfb045223 Fortran: Check constant PDT type specification parameters [PR112460]
2026-01-14  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran
	PR fortran/112460
	* array.cc (resolve_array_list): Stash the first PDT element
	and check its type specification parameters against those of
	subsequent elements.
	* expr.cc (get_parm_list_from_expr): New function to extract the
	type spec lists from expressions to be compared.
	(gfc_check_type_spec_parms): New function to compare type spec
	lists between two expressions. Emit an error if any constant
	values are different.
	(gfc_check_assign): Check that the PDT type specification parms
	are the same on lhs and rhs.
	* gfortran.h : Add prototype for gfc_check_type_spec_parms.
	* trans-expr.cc (copyable_array_p): PDT arrays are not copyable

gcc/testsuite
	PR fortran/112460
	* gfortran.dg/pdt_81.f03: New test.
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