re PR c/59855 (Support sparse-style __attribute__((designated_init)) on structures, requiring designated initializers)

2014-07-30  Tom Tromey  <tromey@redhat.com>

	PR c/59855
	* doc/invoke.texi (Warning Options): Document -Wdesignated-init.
	* doc/extend.texi (Type Attributes): Document designated_init
	attribute.

2014-07-30  Tom Tromey  <tromey@redhat.com>

	PR c/59855
	* c.opt (Wdesignated-init): New option.
	* c-common.c (c_common_attribute_table): Add "designated_init".
	(handle_designated_init): New function.

2014-07-30  Tom Tromey  <tromey@redhat.com>

	* c-typeck.c (struct constructor_stack) <designator_depth>: New
	field.
	(really_start_incremental_init, push_init_level): Initialize
	designator_depth.
	(pop_init_level): Set global designator_depth.
	(process_init_element): Check for designated_init attribute.

From-SVN: r213293