2014-10-20  Robert Dewar  <dewar@adacore.com>

	* gnat_rm.texi: Document No_Tagged_Streams pragma and aspect.
	* snames.ads-tmpl: Add entry for pragma No_Tagged_Streams.
	* aspects.ads, aspects.adb: Add aspect No_Tagged_Streams.
	* einfo.adb (No_Tagged_Streams_Pragma): New field.
	* einfo.ads: Minor reformatting (reorder entries).
	(No_Tagged_Streams_Pragma): New field.
	* exp_ch3.adb: Minor comment update.
	* opt.ads (No_Tagged_Streams): New variable.
	* par-prag.adb: Add dummy entry for pragma No_Tagged_Streams.
	* sem.ads (Save_No_Tagged_Streams): New field in scope record.
	* sem_attr.adb (Check_Stream_Attribute): Check stream ops
	prohibited by No_Tagged_Streams.
	* sem_ch3.adb (Analyze_Full_Type_Declaration): Set
	No_Tagged_Streams_Pragma.
	(Analyze_Subtype_Declaration): ditto.
	(Build_Derived_Record_Type): ditto.
	(Record_Type_Declaration): ditto.
	* sem_ch8.adb (Pop_Scope): Restore No_Tagged_Streams.
	(Push_Scope): Save No_Tagged_Streams.
	* sem_prag.adb (Analyze_Pragma, case No_Tagged_Streams): Implement new
	pragma.

From-SVN: r216476