2007-08-14  Ed Schonberg  <schonberg@adacore.com>
	    Robert Dewar  <dewar@adacore.com>

	* atree.ads, atree.adb (New_Copy_Tree): If hash table is being used and
	itype is visited, make an entry into table to link associated node and
	new itype.
	Add comments and correct harmless error in Build_NCT_Hash_Tables
	(Array_Aggr_Subtype): Associate each itype created for an index type to
	the corresponding range construct, and not to the aggregate itself. to
	maintain a one-to-one correspondence between itype and its associated
	node, to prevent errors when complex expression is copied.
	Fix mishandling of multiple levels of parens

	* sem_aggr.adb: Create a limited view of an incomplete type, to make
	treatment of limited views uniform for all visible declarations in a
	limited_withed package.
	(New_Copy_Tree): If hash table is being used and itype is visited,
	make an entry into table to link associated node and new itype.
	(Resolve_Record_Aggregate): Do not add an others box association for a
	discriminated record component that has only discriminants, when there
	is a box association for the component itself.

	* par-ch4.adb: Fix mishandling of multiple levels of parens

From-SVN: r127412