2006-10-31 Ed Schonberg <schonberg@adacore.com>

	    Hristian Kirtchev  <kirtchev@adacore.com>
        
        * sem_ch12.ads, sem_ch12.adb (Save_References): If node is an operator
	that has been constant-folded, preserve information of original tree,
	for ASIS uses.
	(Analyze_Formal_Derived_Type): Set the limited present flag of the newly
	generated private extension declaration if the formal derived type is
	synchronized. Carry synchronized present over to the generated private
	extension.
	(Validate_Derived_Type_Instance): Ensure that the actual of a
	synchronized formal derived type is a synchronized tagged type.
	(Instantiate_Formal_Package): When creating the instantiation used to
	validate the actual package of a formal declared without a box, check
	whether the formal itself depends on a prior actual.
	(Instantiate_Formal_Subprogram): Create new entities for the defining
	identifiers of the formals in the renaming declaration, for ASIS use.
	(Instantiate_Formal_Subprogram, Instantiate_Formal_Type): When creating
	a renaming declaration or a subtype declaration for an actual in an
	instance, capture location information of declaration in generic, for
	ASIS use.
	(Instantiate_Formal_Package): Add comments on needed additional tests.
	AI-317 (partial parametrization) is fully implemented.
	(Validate_Private_Type_Instance): Add check for actual which
	must have preelaborable initialization
	Use new // insertion for some continuation messages
	(Analyze_Formal_Object_Declaration): Change usage of Expression to
	Default_Expression. Add type retrieval when the declaration has an
	access definition. Update premature usage of incomplete type check.
	(Check_Access_Definition): New subsidiary routine. Check whether the
	current compilation version is Ada 05 and the supplied node has an
	access definition.
	(Instantiate object): Alphabetize local variables. Handle the creation
	of new renaming declarations with respect to the kind of definition
	used - either an access definition or a subtype mark. Guard against
	unnecessary error message in the context of anonymous access types after
	they have been resolved. Add check for required null exclusion in a
	formal object declaration.
	(Switch_View): A private subtype of a non-private type needs to be
	switched (the base type can have been switched without its private
	dependents because of the last branch of Check_Private_View.
	(Check_Private_View): Do not recompute Base_Type (T), instead use cached
	value from BT.
	(Instantiate_Type): Emit an error message whenever a class-wide type of
	a tagged incomplete type is used as a generic actual.
	(Find_Actual_Type): Extend routine to handle a component type in a child
	unit that is imported from a formal package in a parent.
	(Validate_Derived_Type_Instance): Check that analyzed formal and actual
	agree on constrainedness, rather than checking against ultimate ancestor
	(Instantiate_Subprogram_Body): Create a cross-reference link to the
	generic body, for navigation purposes.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@118300 138bc75d-0d04-0410-961f-82ee72b054a4

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