2013-04-12 Hristian Kirtchev <kirtchev@adacore.com>
* sem_ch13.adb (Analyze_Aspect_Specifications): Aspect
Depends is now a delayed aspect. The delay is required
due to the interplay between aspects Depends and Global.
(Check_Aspect_At_Freeze_Point): Add an entry for aspect Depends.
* sem_prag.adb: Reformat various error messages.
(Add_Item): New subsidiary routine.
(Analyze_Pragma): Add new variables
Global_Seen, Result_Seen, Subp_Inputs and Subp_Outputs. The
analysis of pragma Depends now has the capability to check
the proper mode and usage of subprogram inputs and outputs.
(Appears_In): New routine.
(Check_Function_Return): New routine.
(Check_Mode): New routine.
(Check_Usage): New routine.
(Collect_Subprogram_Inputs_Outputs): New routine.
From-SVN: r197900
