sem_util.ads, [...] (In_Subprogram): New function.

gcc/ada/
	* sem_util.ads, sem_util.adb (In_Subprogram): New function.
	* sem_attr.adb (Analyze_Attribute, Attribute_Old case): Use it.

    gcc/testsuite/
	* gnat.dg/deep_old.adb: New.

From-SVN: r134260

gcc/ada/ChangeLog

@@ -1,3 +1,8 @@
+2008-04-14  Samuel Tardieu  <sam@rfc1149.net>
+
+	* sem_util.ads, sem_util.adb (In_Subprogram): New function.
+	* sem_attr.adb (Analyze_Attribute, Attribute_Old case): Use it.
+
 2008-04-14  Rolf Ebert  <rolf.ebert.gcc@gmx.de>
 
 	PR ada/20822

gcc/ada/sem_attr.adb

@@ -3472,7 +3472,7 @@ package body Sem_Attr is
          Check_E0;
          Set_Etype (N, P_Type);
 
-         if not Is_Subprogram (Current_Scope) then
+         if not In_Subprogram then
             Error_Attr ("attribute % can only appear within subprogram", N);
          end if;
 

gcc/ada/sem_util.adb

@@ -5365,6 +5365,15 @@ package body Sem_Util is
       return False;
    end In_Package_Body;
 
+   -------------------
+   -- In_Subprogram --
+   -------------------
+
+   function In_Subprogram return Boolean is
+   begin
+      return Current_Subprogram /= Empty;
+   end In_Subprogram;
+
    --------------------------------------
    -- In_Subprogram_Or_Concurrent_Unit --
    --------------------------------------

gcc/ada/sem_util.ads

@@ -587,6 +587,12 @@ package Sem_Util is
    function In_Package_Body return Boolean;
    --  Returns True if current scope is within a package body
 
+   function In_Subprogram return Boolean;
+   --  Determines if the current scope is within a subprogram compilation
+   --  unit (inside a subprogram declaration, subprogram body, or generic
+   --  subprogram declaration). The test is for appearing anywhere within
+   --  such a construct (that is it does not need to be directly within).
+
    function In_Subprogram_Or_Concurrent_Unit return Boolean;
    --  Determines if the current scope is within a subprogram compilation
    --  unit (inside a subprogram declaration, subprogram body, or generic

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2008-04-14  Samuel Tardieu  <sam@rfc1149.net>
+
+	* gnat.dg/deep_old.adb: New.
+
 2008-04-14  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/loop_address2.adb: New test.

gcc/testsuite/gnat.dg/deep_old.adb

@@ -0,0 +1,8 @@
+procedure Deep_Old (X : Integer) is
+begin
+   begin
+      if X = X'Old then
+         null;
+      end if;
+   end;
+end Deep_Old;