ada: Accept aspects Global and Depends on abstract subprograms

Aspects Global and Depends are now allowed on abstract subprograms
(as substitutes for Global'Class and Depends'Class).

This patch implements the recently modified rules SPARK RM 6.1.2(2-3).
The behavior for Contract_Cases and aspects on null subprograms stays
as it was.

gcc/ada/

	* sem_prag.adb (Analyze_Depends_Global): Accept aspects on
	abstract subprograms.

diff --git a/gcc/ada/sem_prag.adb b/gcc/ada/sem_prag.adb
index f2c1a3f0e6eb8cca100433103908637500ceb53d..0a91518cff956e830dea5b1d53f4c74d6d033dbd 100644 (file)
--- a/gcc/ada/sem_prag.adb
+++ b/gcc/ada/sem_prag.adb
@@ -4549,6 +4549,11 @@ package body Sem_Prag is
          elsif Nkind (Subp_Decl) = N_Single_Task_Declaration then
             null;
 
+         --  Abstract subprogram declaration
+
+         elsif Nkind (Subp_Decl) = N_Abstract_Subprogram_Declaration then
+            null;
+
          --  Subprogram body acts as spec
 
          elsif Nkind (Subp_Decl) = N_Subprogram_Body