sem_aggr.adb (Analyze_N_Extension_Aggregate): Add legality checks for the ancestor part of an extension aggregate for a...

2008-04-08  Ed Schonberg  <schonberg@adacore.com>
	    Robert Dewar  <dewar@adacore.com>

	* sem_aggr.adb (Analyze_N_Extension_Aggregate): Add legality checks for
	the ancestor part of an extension aggregate for a limited type.
	(Resolve_Array_Aggregate): Issue warning for sliding of aggregate with
	enumeration index bounds.
	(Resolve_Array_Aggregate): Add circuit for diagnosing missing choices
	when array is too short.
	(Check_Expr_OK_In_Limited_Aggregate): Move function
	Check_Non_Limited_Type from Resolve_Record_Aggregate to top level (and
	change name).
	(Resolve_Array_Aggregate.Resolve_Aggr_Expr):
	Check_Expr_OK_In_Limited_Aggregates called to check for illegal limited
	component associations.
	(Check_Non_Limited_Type): Moved to outer level and renamed.
	(Resolve_Record_Aggregate): In an extension aggregate, an association
	with a box initialization can only designate a component of the
	extension, not a component inherited from the given ancestor

	* sem_case.adb: Use new Is_Standard_Character_Type predicate

From-SVN: r134049