* aspects.adb Add an entry for aspect Part_Of in table
	Canonical_Aspect.
	* aspects.ads Add an entry for aspect Part_Of in tables Aspect_Id,
	Aspect_Argument, Aspect_Names and Aspect_Delay.
	* atree.h Define Elist9.
	* atree.adb (Elist9): New routine.
	(Set_Elist9): New routine.
	* atree.ads (Elist9): New routine.
	(Set_Elist9): New routine.
	* einfo.adb Add Part_Of_Constituents and Encapsulating_State to
	the list of node usage.  Remove Refined_State from the list of
	node usage.
	(Encapsulating_State): New routine.
	(Get_Pragma):
	Handle pragma Part_Of; (Part_Of_Constituents): New routine.
	(Refined_State): Removed.
	(Set_Encapsulating_State): New routine.
	(Set_Part_Of_Constituents): New routine.
	(Set_Refined_State): Removed.
	(Write_Field9_Name): Add an entry
	for Part_Of_Constituents (Write_Field10_Name): Add an entry for
	Encapsulating_State. Remove the entry for Refined_State.
	* einfo.ads Add new attributes Encapsulating_State
	and Part_Of_Constituents alond with their usage in
	entities. Remove attribute Refined_State along with its
	usage in entities.
	(Encapsulating_State): New routine and
	pragma Inline.	(Get_Pragma): Update the comment on usage.
	(Part_Of_Constituents): New routine and pragma Inline.
	(Refined_State): Removed along with pragma Inline.
	(Set_Encapsulating_State): New routine and pragma Inline.
	(Set_Part_Of_Constituents): New routine and pragma Inline.
	(Set_Refined_State): Removed along with pragma Inline.
	* par-prag.adb Pragma Part_Of does not need any special processing
	by the parser.
	* sem_ch3.adb (Analyze_Declarations): Remove local variables
	Body_Id and Prag. Call separate routines to analyze the
	contract of a package [body].
	(Analyze_Object_Contract):
	Update the comment on usage. Remove local variables
	Items and Nam. Use Get_Pragma rather than traversing the
	classification list.  Verify whether the lack of indicator
	Part_Of agrees with the placement of the variable in state space.
	(Analyze_Object_Declaration): Initialize the encapsulating state
	of a variable.	(Requires_State_Refinement): Moved to sem_util.
	* sem_ch7.adb (Analyze_Package_Body_Contract): New routine.
	(Analyze_Package_Contract): New routine.
	* sem_ch7.ads (Analyze_Package_Body_Contract): New routine.
	(Analyze_Package_Contract): New routine.
	* sem_ch10.adb (Decorate_State): Initialize the encapsulating
	state and Part_Of constituents.
	* sem_ch13.adb (Analyze_Aspect_Specifications):
	Add processing for aspect Part_Of. Update all
	calls to Decorate_Delayed_Aspect_And_Pragma.
	(Check_Aspect_At_Freeze_Point): Aspect Part_Of does
	not need any special processing at freeze time.
	(Decorate_Delayed_Aspect_And_Pragma): Renamed to
	Decorate_Aspect_And_Pragma.  Add formal parameter Delayed and
	update the associated comment.
	* sem_prag.adb Add an entry for pragma Part_Of in table Sig_Flags.
	(Analyze_Abstract_State): Add new global variable State_Id. Remove
	local constants Errors and Loc. Remove local variables Is_Null
	and State_Nam. Create the entity of the abstract state on the
	spot, before all remaining checks are performed. Verify that a
	missing Part_Of option agrees with the placement of the abstract
	state within the state space.
	(Analyze_Depends_In_Decl_Part):
	Add new global variables Constits_Seen and States_Seen. Check
	that a state and a corresponding constituent do not appear
	in pragma [Refined_]Depends.
	(Analyze_Global_In_Decl_Part):
	Add new global variables Constits_Seen and States_Seen. Check
	that a state and a corresponding constituent do not appear
	in pragma [Refined_]Global.
	(Analyze_Global_Item):
	Remove the now obsolete code that deals with Part_Of.
	Add the entity of the global item to the list of processed
	items.	(Analyze_Initializes_In_Decl_Part): Add new global
	variables Constits_Seen and States_Seen. Check that a state
	and a corresponding constituent do not appear in pragma
	Initializes.
	(Analyze_Initialization_Item): Add the entity
	of the initialization item to the list of processed items.
	(Analyze_Input_Item): Add the entity of the initialization
	item to the list of processed items.
	(Analyze_Input_Output):
	Remove the now obsolete code that deals with Part_Of.  Add the
	entity of the input/output to the list of processed items.
	(Analyze_Part_Of): New routine.
	(Analyze_Part_Of_Option): Remove
	local constant Par_State. Add local constant Encaps and local
	variables Encaps_Id and Legal. Use Analyze_Part of to analyze
	the option. Turn the related state into a Part_Of constituent
	if the option is legal.
	(Analyze_Pragma): Add processing
	for pragma Part_Of.
	(Analyze_Refined_State_In_Decl_Part):
	Remove global constants Pack_Body and Spec_Id. Remove
	global variables Abstr_States and Hidden_States. Add new
	global variables Available_States, Body_Id, Body_States and
	Spec_Id. Add new local constant Body_Decl. Reimplement the
	logic that extracts the states available for refinement from
	the related package and the body hidden states of the said
	package.
	(Analyze_Refinement_Clause): Add local variable Part_Of_Constits.
	(Check_Applicable_Policy): Alphabetize body.
	(Check_Dependency_Clause): Replace Refined_State
	with Encapsulating_State.
	(Check_Matching_Constituent):
	Reimplement the logic that determines whether an item is a valid
	/ invalid constituent of the current refined state. Return when
	a construct does not denote a valid abstract state. Extract the
	list of Part_Of constituents for further analysis. Check that all
	Part_Of constituents of a state have been used in its refinement.
	(Check_Matching_State): Update the comment on usage. Operate
	on the list of available states.
	(Check_Missing_Part_Of): New routine.
	(Check_Refined_Global_Item): Replace Refined_State
	with Encapsulating_State.
	(Check_State_And_Constituent_Use): New routine.
	(Create_Abstract_State): New routine.
	(Is_Matching_Input): Replace Refined_State with Encapsulating_State.
	(Is_Part_Of): Removed.
	(Collect_Body_States): New routine.
	(Collect_Constituent): Replace Refined_State with Encapsulating_State.
	(Collect_Hidden_States): Removed.
	(Report_Unrefined_States): Change the profile of the procedure along
	with the comment on usage.
	(Report_Unused_Constituents): New routine.
	(Report_Unused_Hidden_States): Removed.
	(Report_Unused_States): New routine.
	* sem_prag.ads (Check_Missing_Part_Of): New routine.
	* sem_util.adb (Add_Contract_Item): Pragma Part_Of can now
	appear in the classification pragmas of a package instantiation
	or a variable.
	(Find_Placement_In_State_Space): New routine.
	(Is_Child): Removed.
	(Is_Child_Or_Sibling): Remove formal
	parameter Private_Child. Remove the private child checks.
	(Requires_State_Refinement): Moved from sem_ch3.
	* sem_util.ads Add new type State_Space_Kind along with
	comment on its usage and values.
	(Add_Contract_Item): Update the comment on usage.
	(Find_Body_Discriminal): Alphabetize spec.
	(Find_Placement_In_State_Space): New routine.
	(Is_Child_Or_Sibling): Remove formal parameter Private_Child
	and update the comment on usage.
	(Requires_State_Refinement): Moved from sem_ch3.
	* sinfo.ads: Update the documentation of N_Contract.
	* snames.ads-tmpl The predefined name for Part_Of is now used
	to denote a pragma. Add Pragma_Id for Part_Of.

From-SVN: r207251