2011-09-02 Ed Schonberg <schonberg@adacore.com>

2011-09-02  Ed Schonberg  <schonberg@adacore.com>

	* sinfo.ads, sinfo.adb: New semantic attribute Premature_Use,
	present in incomplete type declarations to refine the error
	message the full declaration is in the same unit.
	* sem_ch4.adb (Analyze_Selected_Component): If the prefix is of
	an incomplete type, set the Premature_Use for additional message.
	* sem_ch3.adb (Find_Type_Name): If partial view is incomplete
	and Premature_Use is set, place additional information at the
	point of premature use.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@178461 138bc75d-0d04-0410-961f-82ee72b054a4