2007-08-14 Thomas Quinot <quinot@adacore.com>

2007-08-14  Thomas Quinot  <quinot@adacore.com>
	    Ed Schonberg  <schonberg@adacore.com>

	* sem_cat.ads, sem_cat.adb (Has_Stream_Attribute_Definition): New
	formal At_Any_Place indicating, when True, that we want to test for
	availability of the stream attribute at any place (as opposed to the
	current visibility context only).
	(Missing_Read_Write_Attributes): A stream attribute is missing for the
	purpose of enforcing E.2.2(8) only if it is not available at any place.
	Take into account the Ada2005 pragma Has_Preelaborable_Initialization
	when checking the legality of an extension aggregate in a preelaborable
	package. Treat the literal null as a valid default expression in a
	component declaration for a type with preelaborable initialization.
	A limited interface is a legal progenitor for the designated type of a
	remote access to class-wide type.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@127445 138bc75d-0d04-0410-961f-82ee72b054a4