[multiple changes]

2015-10-26  Bob Duff  <duff@adacore.com>

	* sem_ch13.adb (Check_Iterator_Functions): For a Default_Iterator
	aspect, make sure an implicitly declared interpretation is
	overridden by an explicit one.
	* sem_util.ads: Update comment.

2015-10-26  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_ch7.adb, sem_ch6.adb (Analyze_Subprogram_Body_Helper): Only source
	bodies should "freeze" the contract of the nearest enclosing
	package body.

From-SVN: r229321

gcc/ada/ChangeLog

+2015-10-26  Bob Duff  <duff@adacore.com>
+
+	* sem_ch13.adb (Check_Iterator_Functions): For a Default_Iterator
+	aspect, make sure an implicitly declared interpretation is
+	overridden by an explicit one.
+	* sem_util.ads: Update comment.
+
+2015-10-26  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* sem_ch7.adb, sem_ch6.adb (Analyze_Subprogram_Body_Helper): Only source
+	bodies should "freeze" the contract of the nearest enclosing
+	package body.
+
 2015-10-26  Joel Brobecker  <brobecker@adacore.com brobecker>
 
 	* adaint.c (__gnat_lwp_self): Replace current implementation re-using

gcc/ada/sem_ch13.adb

@@ -4277,8 +4277,8 @@ package body Sem_Ch13 is
          else
             declare
                Default : Entity_Id := Empty;
-               I : Interp_Index;
-               It : Interp;
+               I       : Interp_Index;
+               It      : Interp;
 
             begin
                Get_First_Interp (Expr, I, It);
@@ -4289,12 +4289,21 @@ package body Sem_Ch13 is
                      Remove_Interp (I);
 
                   elsif Present (Default) then
-                     Error_Msg_N ("default iterator must be unique", Expr);
-                     Error_Msg_Sloc := Sloc (Default);
-                     Error_Msg_N ("\\possible interpretation#", Expr);
-                     Error_Msg_Sloc := Sloc (It.Nam);
-                     Error_Msg_N ("\\possible interpretation#", Expr);
 
+                     --  An explicit one should override an implicit one
+
+                     if Comes_From_Source (Default) =
+                          Comes_From_Source (It.Nam)
+                     then
+                        Error_Msg_N ("default iterator must be unique", Expr);
+                        Error_Msg_Sloc := Sloc (Default);
+                        Error_Msg_N ("\\possible interpretation#", Expr);
+                        Error_Msg_Sloc := Sloc (It.Nam);
+                        Error_Msg_N ("\\possible interpretation#", Expr);
+
+                     elsif Comes_From_Source (It.Nam) then
+                        Default := It.Nam;
+                     end if;
                   else
                      Default := It.Nam;
                   end if;

gcc/ada/sem_ch6.adb

@@ -3011,7 +3011,14 @@ package body Sem_Ch6 is
       --  decoupled from the usual Freeze_xxx mechanism because it must also
       --  work in the context of generics where normal freezing is disabled.
 
-      Analyze_Enclosing_Package_Body_Contract (N);
+      --  Only bodies coming from source should cause this type of "freezing".
+      --  Expression functions that act as bodies and complete an initial
+      --  declaration must be included in this category, hence the use of
+      --  Original_Node.
+
+      if Comes_From_Source (Original_Node (N)) then
+         Analyze_Enclosing_Package_Body_Contract (N);
+      end if;
 
       --  Generic subprograms are handled separately. They always have a
       --  generic specification. Determine whether current scope has a

gcc/ada/sem_ch7.adb

@@ -564,7 +564,11 @@ package body Sem_Ch7 is
       --  Freeze_xxx mechanism because it must also work in the context of
       --  generics where normal freezing is disabled.
 
-      Analyze_Enclosing_Package_Body_Contract (N);
+      --  Only bodies coming from source should cause this type of "freezing"
+
+      if Comes_From_Source (N) then
+         Analyze_Enclosing_Package_Body_Contract (N);
+      end if;
 
       --  Find corresponding package specification, and establish the current
       --  scope. The visible defining entity for the package is the defining

gcc/ada/sem_util.ads

@@ -538,10 +538,9 @@ package Sem_Util is
 
    function Enclosing_Lib_Unit_Entity
      (E : Entity_Id := Current_Scope) return Entity_Id;
-   --  Returns the entity of enclosing library unit node which is the
-   --  root of the current scope (which must not be Standard_Standard, and the
-   --  caller is responsible for ensuring this condition) or other specified
-   --  entity.
+   --  Returns the entity of enclosing library unit node which is the root of
+   --  the current scope (which must not be Standard_Standard, and the caller
+   --  is responsible for ensuring this condition) or other specified entity.
 
    function Enclosing_Lib_Unit_Node (N : Node_Id) return Node_Id;
    --  Returns the N_Compilation_Unit node of the library unit that is directly