sem_res.adb (Resolve_Allocator): Propagate any coextensions that appear in the…

sem_res.adb (Resolve_Allocator): Propagate any coextensions that appear in the subtree to the current allocator...

2007-08-14  Ed Schonberg  <schonberg@adacore.com>
	    Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_res.adb (Resolve_Allocator): Propagate any coextensions that
	appear in the subtree to the current allocator if it is not a static
	coextension.
	(Resolve_Allocator): Perform cleanup if resolution has determined that
	the allocator is not a coextension.
	(Resolve): Skip an interpretation hidden by an abstract operator only
	when the type of the interpretation matches that of the context.
	(Resolve): When looping through all possible interpretations of a node,
	do not consider those that are hidden by abstract operators.
	(Resolve_Actuals): When verifying that an access to class-wide object
	is an actual  for a controlling formal, ignore anonymous access to
	subprograms whose return type is an access to class_wide type.
	(Resolve_Slice): If the prefix of the slice is a selected component
	whose type depends on discriminants, build its actual subtype before
	applying range checks on the bounds of the slice.
	(Valid_Conversion): In an instance or inlined body, compare root types,
	to prevent anomalies between private and public views.
	(Resolve): Improve error message for ambiguous fixed multiplication
	expressions that involve universal_fixed multiplying operations.

From-SVN: r127447