sem_type.adb (Write_Overloads): Improve display of candidate interpretations.

sem_type.adb (Write_Overloads): Improve display of candidate interpretations.

2006-02-13  Ed Schonberg  <schonberg@adacore.com>
	    Javier Miranda  <miranda@adacore.com>

	* sem_type.adb (Write_Overloads): Improve display of candidate
	interpretations.
	(Add_One_Interp): Do not add to the list of interpretations aliased
	entities corresponding with an abstract interface type that is an
	immediate ancestor of a tagged type; otherwise we have a dummy
	conflict between this entity and the aliased entity.
	(Disambiguate): The predefined equality on universal_access is not
	usable if there is a user-defined equality with the proper signature,
	declared in the same declarative part as the designated type.
	(Find_Unique_Type): The universal_access equality operator defined under
	AI-230 does not cover pool specific access types.
	(Covers): If one of the types is a generic actual subtype, check whether
	it matches the partial view of the other type.

From-SVN: r111096