backport: re PR fortran/60255 ([OOP] Deferred character length variable at (1) cannot...

backport: re PR fortran/60255 ([OOP] Deferred character length variable at (1) cannot yet be associated with unlimited polymorphic entities)

gcc/fortran/ChangeLog

2015-03-23  Andre Vehreschild  <vehre@gmx.de>
	    Janus Weil  <janus@gcc.gnu.org>

	Backported from mainline
	PR fortran/60255
	Initial patch version: Janus Weil
	* class.c (gfc_get_len_component): New.
	(gfc_build_class_symbol): Add _len component to unlimited
	polymorphic entities.
	(find_intrinsic_vtab): Removed emitting of error message.
	* gfortran.h: Added prototype for gfc_get_len_component.
	* simplify.c (gfc_simplify_len): Use _len component where
	available.
	* trans-expr.c (gfc_class_len_get): New.
	(gfc_conv_intrinsic_to_class): Add handling for deferred
	character arrays.
	(gfc_conv_structure): Treat _len component correctly.
	(gfc_conv_expr): Prevent bind_c handling when not required.
	(gfc_trans_pointer_assignment): Propagate _len component.
	* trans-stmt.c (class_has_len_component): New.
	(trans_associate_var): _len component treatement for associate
	context.
	(gfc_trans_allocate): Same as for trans_associate_var()
	* trans.h: Add prototype for gfc_class_len_get.

gcc/testsuite/ChangeLog

2015-03-20  Andre Vehreschild  <vehre@gmx.de>

	Backport from mainline
	PR fortran/60255
	* gfortran.dg/unlimited_polymorphic_2.f03: Removed error.
	Converted from dos to unix line endings.
	* gfortran.dg/unlimited_polymorphic_20.f03: New test.

Co-Authored-By: Janus Weil <janus@gcc.gnu.org>
From-SVN: r221591