sem_ch12.adb (Analyze_Associations): Diagnose use of an others association in an instance.

2007-04-20  Ed Schonberg  <schonberg@adacore.com>
	    Javier Miranda  <miranda@adacore.com>

	* sem_ch12.adb (Analyze_Associations): Diagnose use of an others
	association in an instance.
	(Copy_Generic_Node): If the node is a string literal, no need to copy
	its descendants.
	(Is_Generic_Formal): For a formal subprogram, the declaration is the
	grandparent of the entity.
	(Analyze_Formal_Interface_Type): Transform into a full type declaration,
	to simplify handling of formal interfaces that derive from other formal
	interfaces.
	(Instantiate_Subprogram_Body): The defining unit name of the body of
	the instance should be a defining identifier.
	(Install_Formal_Packages): make global to the package, for use in
	instantiations of child units.
	(Analyze_Package_Instantiation): Do not attempt to set information on an
	enclosing master of an entry when expansion is disabled.
	(Instantiate_Type): If the actual is a tagged synchronized type and the
	generic ancestor is an interface, create a generic actual for the
	corresponding record.
	(Analyze_Formal_Derived_Interface_Type): Rewrite as a derived type
	declaration, to ensure that the interface list is processed correctly.
	(Inline_Instance_Body): If enclosing scope is an instance body, remove
	its entities from visibiility as well.
	(Pre_Analyze_Actuals): if the actual is an allocator with  constraints
	given with a named association, analyze the expression only, not the
	discriminant association itself.
	(Reset_Entity): If the analysis of a selected component is transformed
	into an expanded name in the prefix of a call with parameters, do not
	transform the original node into an expanded name, to prevent visibility
	errors in the case of nested generics.
	(Check_Private_View): For an array type, check whether the index types
	may need exchanging.

From-SVN: r125431