--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/a-cborma.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,1639 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT LIBRARY COMPONENTS                          --
+--                                                                          --
+--   A D A . C O N T A I N E R S . B O U N D E D _ O R D E R E D _ M A P S  --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 2004-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- This unit was originally developed by Matthew J Heaney.                  --
+------------------------------------------------------------------------------
+
+with Ada.Containers.Helpers; use Ada.Containers.Helpers;
+
+with Ada.Containers.Red_Black_Trees.Generic_Bounded_Operations;
+pragma Elaborate_All
+  (Ada.Containers.Red_Black_Trees.Generic_Bounded_Operations);
+
+with Ada.Containers.Red_Black_Trees.Generic_Bounded_Keys;
+pragma Elaborate_All
+  (Ada.Containers.Red_Black_Trees.Generic_Bounded_Keys);
+
+with System; use type System.Address;
+
+package body Ada.Containers.Bounded_Ordered_Maps is
+
+   pragma Warnings (Off, "variable ""Busy*"" is not referenced");
+   pragma Warnings (Off, "variable ""Lock*"" is not referenced");
+   --  See comment in Ada.Containers.Helpers
+
+   -----------------------------
+   -- Node Access Subprograms --
+   -----------------------------
+
+   --  These subprograms provide a functional interface to access fields
+   --  of a node, and a procedural interface for modifying these values.
+
+   function Color (Node : Node_Type) return Color_Type;
+   pragma Inline (Color);
+
+   function Left (Node : Node_Type) return Count_Type;
+   pragma Inline (Left);
+
+   function Parent (Node : Node_Type) return Count_Type;
+   pragma Inline (Parent);
+
+   function Right (Node : Node_Type) return Count_Type;
+   pragma Inline (Right);
+
+   procedure Set_Parent (Node : in out Node_Type; Parent : Count_Type);
+   pragma Inline (Set_Parent);
+
+   procedure Set_Left (Node : in out Node_Type; Left : Count_Type);
+   pragma Inline (Set_Left);
+
+   procedure Set_Right (Node : in out Node_Type; Right : Count_Type);
+   pragma Inline (Set_Right);
+
+   procedure Set_Color (Node : in out Node_Type; Color : Color_Type);
+   pragma Inline (Set_Color);
+
+   -----------------------
+   -- Local Subprograms --
+   -----------------------
+
+   function Is_Greater_Key_Node
+     (Left  : Key_Type;
+      Right : Node_Type) return Boolean;
+   pragma Inline (Is_Greater_Key_Node);
+
+   function Is_Less_Key_Node
+     (Left  : Key_Type;
+      Right : Node_Type) return Boolean;
+   pragma Inline (Is_Less_Key_Node);
+
+   --------------------------
+   -- Local Instantiations --
+   --------------------------
+
+   package Tree_Operations is
+      new Red_Black_Trees.Generic_Bounded_Operations (Tree_Types);
+
+   use Tree_Operations;
+
+   package Key_Ops is
+     new Red_Black_Trees.Generic_Bounded_Keys
+       (Tree_Operations     => Tree_Operations,
+        Key_Type            => Key_Type,
+        Is_Less_Key_Node    => Is_Less_Key_Node,
+        Is_Greater_Key_Node => Is_Greater_Key_Node);
+
+   ---------
+   -- "<" --
+   ---------
+
+   function "<" (Left, Right : Cursor) return Boolean is
+   begin
+      if Checks and then Left.Node = 0 then
+         raise Constraint_Error with "Left cursor of ""<"" equals No_Element";
+      end if;
+
+      if Checks and then Right.Node = 0 then
+         raise Constraint_Error with "Right cursor of ""<"" equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Left.Container.all, Left.Node),
+                     "Left cursor of ""<"" is bad");
+
+      pragma Assert (Vet (Right.Container.all, Right.Node),
+                     "Right cursor of ""<"" is bad");
+
+      declare
+         LN : Node_Type renames Left.Container.Nodes (Left.Node);
+         RN : Node_Type renames Right.Container.Nodes (Right.Node);
+
+      begin
+         return LN.Key < RN.Key;
+      end;
+   end "<";
+
+   function "<" (Left : Cursor; Right : Key_Type) return Boolean is
+   begin
+      if Checks and then Left.Node = 0 then
+         raise Constraint_Error with "Left cursor of ""<"" equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Left.Container.all, Left.Node),
+                     "Left cursor of ""<"" is bad");
+
+      declare
+         LN : Node_Type renames Left.Container.Nodes (Left.Node);
+
+      begin
+         return LN.Key < Right;
+      end;
+   end "<";
+
+   function "<" (Left : Key_Type; Right : Cursor) return Boolean is
+   begin
+      if Checks and then Right.Node = 0 then
+         raise Constraint_Error with "Right cursor of ""<"" equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Right.Container.all, Right.Node),
+                     "Right cursor of ""<"" is bad");
+
+      declare
+         RN : Node_Type renames Right.Container.Nodes (Right.Node);
+
+      begin
+         return Left < RN.Key;
+      end;
+   end "<";
+
+   ---------
+   -- "=" --
+   ---------
+
+   function "=" (Left, Right : Map) return Boolean is
+      function Is_Equal_Node_Node (L, R : Node_Type) return Boolean;
+      pragma Inline (Is_Equal_Node_Node);
+
+      function Is_Equal is
+        new Tree_Operations.Generic_Equal (Is_Equal_Node_Node);
+
+      ------------------------
+      -- Is_Equal_Node_Node --
+      ------------------------
+
+      function Is_Equal_Node_Node
+        (L, R : Node_Type) return Boolean is
+      begin
+         if L.Key < R.Key then
+            return False;
+
+         elsif R.Key < L.Key then
+            return False;
+
+         else
+            return L.Element = R.Element;
+         end if;
+      end Is_Equal_Node_Node;
+
+   --  Start of processing for "="
+
+   begin
+      return Is_Equal (Left, Right);
+   end "=";
+
+   ---------
+   -- ">" --
+   ---------
+
+   function ">" (Left, Right : Cursor) return Boolean is
+   begin
+      if Checks and then Left.Node = 0 then
+         raise Constraint_Error with "Left cursor of "">"" equals No_Element";
+      end if;
+
+      if Checks and then Right.Node = 0 then
+         raise Constraint_Error with "Right cursor of "">"" equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Left.Container.all, Left.Node),
+                     "Left cursor of "">"" is bad");
+
+      pragma Assert (Vet (Right.Container.all, Right.Node),
+                     "Right cursor of "">"" is bad");
+
+      declare
+         LN : Node_Type renames Left.Container.Nodes (Left.Node);
+         RN : Node_Type renames Right.Container.Nodes (Right.Node);
+
+      begin
+         return RN.Key < LN.Key;
+      end;
+   end ">";
+
+   function ">" (Left : Cursor; Right : Key_Type) return Boolean is
+   begin
+      if Checks and then Left.Node = 0 then
+         raise Constraint_Error with "Left cursor of "">"" equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Left.Container.all, Left.Node),
+                     "Left cursor of "">"" is bad");
+
+      declare
+         LN : Node_Type renames Left.Container.Nodes (Left.Node);
+      begin
+         return Right < LN.Key;
+      end;
+   end ">";
+
+   function ">" (Left : Key_Type; Right : Cursor) return Boolean is
+   begin
+      if Checks and then Right.Node = 0 then
+         raise Constraint_Error with "Right cursor of "">"" equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Right.Container.all, Right.Node),
+                     "Right cursor of "">"" is bad");
+
+      declare
+         RN : Node_Type renames Right.Container.Nodes (Right.Node);
+
+      begin
+         return RN.Key < Left;
+      end;
+   end ">";
+
+   ------------
+   -- Assign --
+   ------------
+
+   procedure Assign (Target : in out Map; Source : Map) is
+      procedure Append_Element (Source_Node : Count_Type);
+
+      procedure Append_Elements is
+         new Tree_Operations.Generic_Iteration (Append_Element);
+
+      --------------------
+      -- Append_Element --
+      --------------------
+
+      procedure Append_Element (Source_Node : Count_Type) is
+         SN : Node_Type renames Source.Nodes (Source_Node);
+
+         procedure Set_Element (Node : in out Node_Type);
+         pragma Inline (Set_Element);
+
+         function New_Node return Count_Type;
+         pragma Inline (New_Node);
+
+         procedure Insert_Post is
+            new Key_Ops.Generic_Insert_Post (New_Node);
+
+         procedure Unconditional_Insert_Sans_Hint is
+            new Key_Ops.Generic_Unconditional_Insert (Insert_Post);
+
+         procedure Unconditional_Insert_Avec_Hint is
+            new Key_Ops.Generic_Unconditional_Insert_With_Hint
+              (Insert_Post,
+               Unconditional_Insert_Sans_Hint);
+
+         procedure Allocate is
+            new Tree_Operations.Generic_Allocate (Set_Element);
+
+         --------------
+         -- New_Node --
+         --------------
+
+         function New_Node return Count_Type is
+            Result : Count_Type;
+
+         begin
+            Allocate (Target, Result);
+            return Result;
+         end New_Node;
+
+         -----------------
+         -- Set_Element --
+         -----------------
+
+         procedure Set_Element (Node : in out Node_Type) is
+         begin
+            Node.Key := SN.Key;
+            Node.Element := SN.Element;
+         end Set_Element;
+
+         Target_Node : Count_Type;
+
+      --  Start of processing for Append_Element
+
+      begin
+         Unconditional_Insert_Avec_Hint
+           (Tree  => Target,
+            Hint  => 0,
+            Key   => SN.Key,
+            Node  => Target_Node);
+      end Append_Element;
+
+   --  Start of processing for Assign
+
+   begin
+      if Target'Address = Source'Address then
+         return;
+      end if;
+
+      if Checks and then Target.Capacity < Source.Length then
+         raise Capacity_Error
+           with "Target capacity is less than Source length";
+      end if;
+
+      Tree_Operations.Clear_Tree (Target);
+      Append_Elements (Source);
+   end Assign;
+
+   -------------
+   -- Ceiling --
+   -------------
+
+   function Ceiling (Container : Map; Key : Key_Type) return Cursor is
+      Node : constant Count_Type := Key_Ops.Ceiling (Container, Key);
+
+   begin
+      if Node = 0 then
+         return No_Element;
+      end if;
+
+      return Cursor'(Container'Unrestricted_Access, Node);
+   end Ceiling;
+
+   -----------
+   -- Clear --
+   -----------
+
+   procedure Clear (Container : in out Map) is
+   begin
+      Tree_Operations.Clear_Tree (Container);
+   end Clear;
+
+   -----------
+   -- Color --
+   -----------
+
+   function Color (Node : Node_Type) return Color_Type is
+   begin
+      return Node.Color;
+   end Color;
+
+   ------------------------
+   -- Constant_Reference --
+   ------------------------
+
+   function Constant_Reference
+     (Container : aliased Map;
+      Position  : Cursor) return Constant_Reference_Type
+   is
+   begin
+      if Checks and then Position.Container = null then
+         raise Constraint_Error with
+           "Position cursor has no element";
+      end if;
+
+      if Checks and then Position.Container /= Container'Unrestricted_Access
+      then
+         raise Program_Error with
+           "Position cursor designates wrong map";
+      end if;
+
+      pragma Assert (Vet (Container, Position.Node),
+                     "Position cursor in Constant_Reference is bad");
+
+      declare
+         N : Node_Type renames Container.Nodes (Position.Node);
+         TC : constant Tamper_Counts_Access :=
+           Container.TC'Unrestricted_Access;
+      begin
+         return R : constant Constant_Reference_Type :=
+           (Element => N.Element'Access,
+            Control => (Controlled with TC))
+         do
+            Lock (TC.all);
+         end return;
+      end;
+   end Constant_Reference;
+
+   function Constant_Reference
+     (Container : aliased Map;
+      Key       : Key_Type) return Constant_Reference_Type
+   is
+      Node : constant Count_Type := Key_Ops.Find (Container, Key);
+
+   begin
+      if Checks and then Node = 0 then
+         raise Constraint_Error with "key not in map";
+      end if;
+
+      declare
+         N : Node_Type renames Container.Nodes (Node);
+         TC : constant Tamper_Counts_Access :=
+           Container.TC'Unrestricted_Access;
+      begin
+         return R : constant Constant_Reference_Type :=
+           (Element => N.Element'Access,
+            Control => (Controlled with TC))
+         do
+            Lock (TC.all);
+         end return;
+      end;
+   end Constant_Reference;
+
+   --------------
+   -- Contains --
+   --------------
+
+   function Contains (Container : Map; Key : Key_Type) return Boolean is
+   begin
+      return Find (Container, Key) /= No_Element;
+   end Contains;
+
+   ----------
+   -- Copy --
+   ----------
+
+   function Copy (Source : Map; Capacity : Count_Type := 0) return Map is
+      C : Count_Type;
+
+   begin
+      if Capacity = 0 then
+         C := Source.Length;
+
+      elsif Capacity >= Source.Length then
+         C := Capacity;
+
+      elsif Checks then
+         raise Capacity_Error with "Capacity value too small";
+      end if;
+
+      return Target : Map (Capacity => C) do
+         Assign (Target => Target, Source => Source);
+      end return;
+   end Copy;
+
+   ------------
+   -- Delete --
+   ------------
+
+   procedure Delete (Container : in out Map; Position : in out Cursor) is
+   begin
+      if Checks and then Position.Node = 0 then
+         raise Constraint_Error with
+           "Position cursor of Delete equals No_Element";
+      end if;
+
+      if Checks and then Position.Container /= Container'Unrestricted_Access
+      then
+         raise Program_Error with
+           "Position cursor of Delete designates wrong map";
+      end if;
+
+      pragma Assert (Vet (Container, Position.Node),
+                     "Position cursor of Delete is bad");
+
+      Tree_Operations.Delete_Node_Sans_Free (Container, Position.Node);
+      Tree_Operations.Free (Container, Position.Node);
+
+      Position := No_Element;
+   end Delete;
+
+   procedure Delete (Container : in out Map; Key : Key_Type) is
+      X : constant Count_Type := Key_Ops.Find (Container, Key);
+
+   begin
+      if Checks and then X = 0 then
+         raise Constraint_Error with "key not in map";
+      end if;
+
+      Tree_Operations.Delete_Node_Sans_Free (Container, X);
+      Tree_Operations.Free (Container, X);
+   end Delete;
+
+   ------------------
+   -- Delete_First --
+   ------------------
+
+   procedure Delete_First (Container : in out Map) is
+      X : constant Count_Type := Container.First;
+
+   begin
+      if X /= 0 then
+         Tree_Operations.Delete_Node_Sans_Free (Container, X);
+         Tree_Operations.Free (Container, X);
+      end if;
+   end Delete_First;
+
+   -----------------
+   -- Delete_Last --
+   -----------------
+
+   procedure Delete_Last (Container : in out Map) is
+      X : constant Count_Type := Container.Last;
+
+   begin
+      if X /= 0 then
+         Tree_Operations.Delete_Node_Sans_Free (Container, X);
+         Tree_Operations.Free (Container, X);
+      end if;
+   end Delete_Last;
+
+   -------------
+   -- Element --
+   -------------
+
+   function Element (Position : Cursor) return Element_Type is
+   begin
+      if Checks and then Position.Node = 0 then
+         raise Constraint_Error with
+           "Position cursor of function Element equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Position.Container.all, Position.Node),
+                     "Position cursor of function Element is bad");
+
+      return Position.Container.Nodes (Position.Node).Element;
+   end Element;
+
+   function Element (Container : Map; Key : Key_Type) return Element_Type is
+      Node : constant Count_Type := Key_Ops.Find (Container, Key);
+   begin
+      if Checks and then Node = 0 then
+         raise Constraint_Error with "key not in map";
+      end if;
+
+      return Container.Nodes (Node).Element;
+   end Element;
+
+   ---------------------
+   -- Equivalent_Keys --
+   ---------------------
+
+   function Equivalent_Keys (Left, Right : Key_Type) return Boolean is
+   begin
+      if Left < Right
+        or else Right < Left
+      then
+         return False;
+      else
+         return True;
+      end if;
+   end Equivalent_Keys;
+
+   -------------
+   -- Exclude --
+   -------------
+
+   procedure Exclude (Container : in out Map; Key : Key_Type) is
+      X : constant Count_Type := Key_Ops.Find (Container, Key);
+
+   begin
+      if X /= 0 then
+         Tree_Operations.Delete_Node_Sans_Free (Container, X);
+         Tree_Operations.Free (Container, X);
+      end if;
+   end Exclude;
+
+   --------------
+   -- Finalize --
+   --------------
+
+   procedure Finalize (Object : in out Iterator) is
+   begin
+      if Object.Container /= null then
+         Unbusy (Object.Container.TC);
+      end if;
+   end Finalize;
+
+   ----------
+   -- Find --
+   ----------
+
+   function Find (Container : Map; Key : Key_Type) return Cursor is
+      Node : constant Count_Type := Key_Ops.Find (Container, Key);
+   begin
+      if Node = 0 then
+         return No_Element;
+      else
+         return Cursor'(Container'Unrestricted_Access, Node);
+      end if;
+   end Find;
+
+   -----------
+   -- First --
+   -----------
+
+   function First (Container : Map) return Cursor is
+   begin
+      if Container.First = 0 then
+         return No_Element;
+      else
+         return Cursor'(Container'Unrestricted_Access, Container.First);
+      end if;
+   end First;
+
+   function First (Object : Iterator) return Cursor is
+   begin
+      --  The value of the iterator object's Node component influences the
+      --  behavior of the First (and Last) selector function.
+
+      --  When the Node component is 0, this means the iterator object was
+      --  constructed without a start expression, in which case the (forward)
+      --  iteration starts from the (logical) beginning of the entire sequence
+      --  of items (corresponding to Container.First, for a forward iterator).
+
+      --  Otherwise, this is iteration over a partial sequence of items. When
+      --  the Node component is positive, the iterator object was constructed
+      --  with a start expression, that specifies the position from which the
+      --  (forward) partial iteration begins.
+
+      if Object.Node = 0 then
+         return Bounded_Ordered_Maps.First (Object.Container.all);
+      else
+         return Cursor'(Object.Container, Object.Node);
+      end if;
+   end First;
+
+   -------------------
+   -- First_Element --
+   -------------------
+
+   function First_Element (Container : Map) return Element_Type is
+   begin
+      if Checks and then Container.First = 0 then
+         raise Constraint_Error with "map is empty";
+      end if;
+
+      return Container.Nodes (Container.First).Element;
+   end First_Element;
+
+   ---------------
+   -- First_Key --
+   ---------------
+
+   function First_Key (Container : Map) return Key_Type is
+   begin
+      if Checks and then Container.First = 0 then
+         raise Constraint_Error with "map is empty";
+      end if;
+
+      return Container.Nodes (Container.First).Key;
+   end First_Key;
+
+   -----------
+   -- Floor --
+   -----------
+
+   function Floor (Container : Map; Key : Key_Type) return Cursor is
+      Node : constant Count_Type := Key_Ops.Floor (Container, Key);
+   begin
+      if Node = 0 then
+         return No_Element;
+      else
+         return Cursor'(Container'Unrestricted_Access, Node);
+      end if;
+   end Floor;
+
+   ------------------------
+   -- Get_Element_Access --
+   ------------------------
+
+   function Get_Element_Access
+     (Position : Cursor) return not null Element_Access is
+   begin
+      return Position.Container.Nodes (Position.Node).Element'Access;
+   end Get_Element_Access;
+
+   -----------------
+   -- Has_Element --
+   -----------------
+
+   function Has_Element (Position : Cursor) return Boolean is
+   begin
+      return Position /= No_Element;
+   end Has_Element;
+
+   -------------
+   -- Include --
+   -------------
+
+   procedure Include
+     (Container : in out Map;
+      Key       : Key_Type;
+      New_Item  : Element_Type)
+   is
+      Position : Cursor;
+      Inserted : Boolean;
+
+   begin
+      Insert (Container, Key, New_Item, Position, Inserted);
+
+      if not Inserted then
+         TE_Check (Container.TC);
+
+         declare
+            N : Node_Type renames Container.Nodes (Position.Node);
+         begin
+            N.Key := Key;
+            N.Element := New_Item;
+         end;
+      end if;
+   end Include;
+
+   ------------
+   -- Insert --
+   ------------
+
+   procedure Insert
+     (Container : in out Map;
+      Key       : Key_Type;
+      New_Item  : Element_Type;
+      Position  : out Cursor;
+      Inserted  : out Boolean)
+   is
+      procedure Assign (Node : in out Node_Type);
+      pragma Inline (Assign);
+
+      function New_Node return Count_Type;
+      pragma Inline (New_Node);
+
+      procedure Insert_Post is
+        new Key_Ops.Generic_Insert_Post (New_Node);
+
+      procedure Insert_Sans_Hint is
+        new Key_Ops.Generic_Conditional_Insert (Insert_Post);
+
+      procedure Allocate is
+         new Tree_Operations.Generic_Allocate (Assign);
+
+      ------------
+      -- Assign --
+      ------------
+
+      procedure Assign (Node : in out Node_Type) is
+      begin
+         Node.Key := Key;
+         Node.Element := New_Item;
+      end Assign;
+
+      --------------
+      -- New_Node --
+      --------------
+
+      function New_Node return Count_Type is
+         Result : Count_Type;
+      begin
+         Allocate (Container, Result);
+         return Result;
+      end New_Node;
+
+   --  Start of processing for Insert
+
+   begin
+      Insert_Sans_Hint
+        (Container,
+         Key,
+         Position.Node,
+         Inserted);
+
+      Position.Container := Container'Unrestricted_Access;
+   end Insert;
+
+   procedure Insert
+     (Container : in out Map;
+      Key       : Key_Type;
+      New_Item  : Element_Type)
+   is
+      Position : Cursor;
+      pragma Unreferenced (Position);
+
+      Inserted : Boolean;
+
+   begin
+      Insert (Container, Key, New_Item, Position, Inserted);
+
+      if Checks and then not Inserted then
+         raise Constraint_Error with "key already in map";
+      end if;
+   end Insert;
+
+   procedure Insert
+     (Container : in out Map;
+      Key       : Key_Type;
+      Position  : out Cursor;
+      Inserted  : out Boolean)
+   is
+      procedure Assign (Node : in out Node_Type);
+      pragma Inline (Assign);
+
+      function New_Node return Count_Type;
+      pragma Inline (New_Node);
+
+      procedure Insert_Post is
+        new Key_Ops.Generic_Insert_Post (New_Node);
+
+      procedure Insert_Sans_Hint is
+        new Key_Ops.Generic_Conditional_Insert (Insert_Post);
+
+      procedure Allocate is
+         new Tree_Operations.Generic_Allocate (Assign);
+
+      ------------
+      -- Assign --
+      ------------
+
+      procedure Assign (Node : in out Node_Type) is
+         pragma Warnings (Off);
+         Default_Initialized_Item : Element_Type;
+         pragma Unmodified (Default_Initialized_Item);
+         --  Default-initialized element (ok to reference, see below)
+
+      begin
+         Node.Key := Key;
+
+      --  There is no explicit element provided, but in an instance the element
+      --  type may be a scalar with a Default_Value aspect, or a composite type
+      --  with such a scalar component or with defaulted components, so insert
+      --  possibly initialized elements at the given position.
+
+         Node.Element := Default_Initialized_Item;
+         pragma Warnings (On);
+      end Assign;
+
+      --------------
+      -- New_Node --
+      --------------
+
+      function New_Node return Count_Type is
+         Result : Count_Type;
+      begin
+         Allocate (Container, Result);
+         return Result;
+      end New_Node;
+
+   --  Start of processing for Insert
+
+   begin
+      Insert_Sans_Hint
+        (Container,
+         Key,
+         Position.Node,
+         Inserted);
+
+      Position.Container := Container'Unrestricted_Access;
+   end Insert;
+
+   --------------
+   -- Is_Empty --
+   --------------
+
+   function Is_Empty (Container : Map) return Boolean is
+   begin
+      return Container.Length = 0;
+   end Is_Empty;
+
+   -------------------------
+   -- Is_Greater_Key_Node --
+   -------------------------
+
+   function Is_Greater_Key_Node
+     (Left  : Key_Type;
+      Right : Node_Type) return Boolean
+   is
+   begin
+      --  Left > Right same as Right < Left
+
+      return Right.Key < Left;
+   end Is_Greater_Key_Node;
+
+   ----------------------
+   -- Is_Less_Key_Node --
+   ----------------------
+
+   function Is_Less_Key_Node
+     (Left  : Key_Type;
+      Right : Node_Type) return Boolean
+   is
+   begin
+      return Left < Right.Key;
+   end Is_Less_Key_Node;
+
+   -------------
+   -- Iterate --
+   -------------
+
+   procedure Iterate
+     (Container : Map;
+      Process   : not null access procedure (Position : Cursor))
+   is
+      procedure Process_Node (Node : Count_Type);
+      pragma Inline (Process_Node);
+
+      procedure Local_Iterate is
+         new Tree_Operations.Generic_Iteration (Process_Node);
+
+      ------------------
+      -- Process_Node --
+      ------------------
+
+      procedure Process_Node (Node : Count_Type) is
+      begin
+         Process (Cursor'(Container'Unrestricted_Access, Node));
+      end Process_Node;
+
+      Busy : With_Busy (Container.TC'Unrestricted_Access);
+
+   --  Start of processing for Iterate
+
+   begin
+      Local_Iterate (Container);
+   end Iterate;
+
+   function Iterate
+     (Container : Map) return Map_Iterator_Interfaces.Reversible_Iterator'Class
+   is
+   begin
+      --  The value of the Node component influences the behavior of the First
+      --  and Last selector functions of the iterator object. When the Node
+      --  component is 0 (as is the case here), this means the iterator object
+      --  was constructed without a start expression. This is a complete
+      --  iterator, meaning that the iteration starts from the (logical)
+      --  beginning of the sequence of items.
+
+      --  Note: For a forward iterator, Container.First is the beginning, and
+      --  for a reverse iterator, Container.Last is the beginning.
+
+      return It : constant Iterator :=
+        (Limited_Controlled with
+           Container => Container'Unrestricted_Access,
+           Node      => 0)
+      do
+         Busy (Container.TC'Unrestricted_Access.all);
+      end return;
+   end Iterate;
+
+   function Iterate
+     (Container : Map;
+      Start     : Cursor)
+      return Map_Iterator_Interfaces.Reversible_Iterator'Class
+   is
+   begin
+      --  Iterator was defined to behave the same as for a complete iterator,
+      --  and iterate over the entire sequence of items. However, those
+      --  semantics were unintuitive and arguably error-prone (it is too easy
+      --  to accidentally create an endless loop), and so they were changed,
+      --  per the ARG meeting in Denver on 2011/11. However, there was no
+      --  consensus about what positive meaning this corner case should have,
+      --  and so it was decided to simply raise an exception. This does imply,
+      --  however, that it is not possible to use a partial iterator to specify
+      --  an empty sequence of items.
+
+      if Checks and then Start = No_Element then
+         raise Constraint_Error with
+           "Start position for iterator equals No_Element";
+      end if;
+
+      if Checks and then Start.Container /= Container'Unrestricted_Access then
+         raise Program_Error with
+           "Start cursor of Iterate designates wrong map";
+      end if;
+
+      pragma Assert (Vet (Container, Start.Node),
+                     "Start cursor of Iterate is bad");
+
+      --  The value of the Node component influences the behavior of the First
+      --  and Last selector functions of the iterator object. When the Node
+      --  component is positive (as is the case here), it means that this
+      --  is a partial iteration, over a subset of the complete sequence of
+      --  items. The iterator object was constructed with a start expression,
+      --  indicating the position from which the iteration begins. (Note that
+      --  the start position has the same value irrespective of whether this
+      --  is a forward or reverse iteration.)
+
+      return It : constant Iterator :=
+        (Limited_Controlled with
+           Container => Container'Unrestricted_Access,
+           Node      => Start.Node)
+      do
+         Busy (Container.TC'Unrestricted_Access.all);
+      end return;
+   end Iterate;
+
+   ---------
+   -- Key --
+   ---------
+
+   function Key (Position : Cursor) return Key_Type is
+   begin
+      if Checks and then Position.Node = 0 then
+         raise Constraint_Error with
+           "Position cursor of function Key equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Position.Container.all, Position.Node),
+                     "Position cursor of function Key is bad");
+
+      return Position.Container.Nodes (Position.Node).Key;
+   end Key;
+
+   ----------
+   -- Last --
+   ----------
+
+   function Last (Container : Map) return Cursor is
+   begin
+      if Container.Last = 0 then
+         return No_Element;
+      else
+         return Cursor'(Container'Unrestricted_Access, Container.Last);
+      end if;
+   end Last;
+
+   function Last (Object : Iterator) return Cursor is
+   begin
+      --  The value of the iterator object's Node component influences the
+      --  behavior of the Last (and First) selector function.
+
+      --  When the Node component is 0, this means the iterator object was
+      --  constructed without a start expression, in which case the (reverse)
+      --  iteration starts from the (logical) beginning of the entire sequence
+      --  (corresponding to Container.Last, for a reverse iterator).
+
+      --  Otherwise, this is iteration over a partial sequence of items. When
+      --  the Node component is positive, the iterator object was constructed
+      --  with a start expression, that specifies the position from which the
+      --  (reverse) partial iteration begins.
+
+      if Object.Node = 0 then
+         return Bounded_Ordered_Maps.Last (Object.Container.all);
+      else
+         return Cursor'(Object.Container, Object.Node);
+      end if;
+   end Last;
+
+   ------------------
+   -- Last_Element --
+   ------------------
+
+   function Last_Element (Container : Map) return Element_Type is
+   begin
+      if Checks and then Container.Last = 0 then
+         raise Constraint_Error with "map is empty";
+      end if;
+
+      return Container.Nodes (Container.Last).Element;
+   end Last_Element;
+
+   --------------
+   -- Last_Key --
+   --------------
+
+   function Last_Key (Container : Map) return Key_Type is
+   begin
+      if Checks and then Container.Last = 0 then
+         raise Constraint_Error with "map is empty";
+      end if;
+
+      return Container.Nodes (Container.Last).Key;
+   end Last_Key;
+
+   ----------
+   -- Left --
+   ----------
+
+   function Left (Node : Node_Type) return Count_Type is
+   begin
+      return Node.Left;
+   end Left;
+
+   ------------
+   -- Length --
+   ------------
+
+   function Length (Container : Map) return Count_Type is
+   begin
+      return Container.Length;
+   end Length;
+
+   ----------
+   -- Move --
+   ----------
+
+   procedure Move (Target : in out Map; Source : in out Map) is
+   begin
+      if Target'Address = Source'Address then
+         return;
+      end if;
+
+      TC_Check (Source.TC);
+
+      Target.Assign (Source);
+      Source.Clear;
+   end Move;
+
+   ----------
+   -- Next --
+   ----------
+
+   procedure Next (Position : in out Cursor) is
+   begin
+      Position := Next (Position);
+   end Next;
+
+   function Next (Position : Cursor) return Cursor is
+   begin
+      if Position = No_Element then
+         return No_Element;
+      end if;
+
+      pragma Assert (Vet (Position.Container.all, Position.Node),
+                     "Position cursor of Next is bad");
+
+      declare
+         M : Map renames Position.Container.all;
+
+         Node : constant Count_Type :=
+           Tree_Operations.Next (M, Position.Node);
+
+      begin
+         if Node = 0 then
+            return No_Element;
+         end if;
+
+         return Cursor'(Position.Container, Node);
+      end;
+   end Next;
+
+   function Next
+     (Object   : Iterator;
+      Position : Cursor) return Cursor
+   is
+   begin
+      if Position.Container = null then
+         return No_Element;
+      end if;
+
+      if Checks and then Position.Container /= Object.Container then
+         raise Program_Error with
+           "Position cursor of Next designates wrong map";
+      end if;
+
+      return Next (Position);
+   end Next;
+
+   ------------
+   -- Parent --
+   ------------
+
+   function Parent (Node : Node_Type) return Count_Type is
+   begin
+      return Node.Parent;
+   end Parent;
+
+   --------------
+   -- Previous --
+   --------------
+
+   procedure Previous (Position : in out Cursor) is
+   begin
+      Position := Previous (Position);
+   end Previous;
+
+   function Previous (Position : Cursor) return Cursor is
+   begin
+      if Position = No_Element then
+         return No_Element;
+      end if;
+
+      pragma Assert (Vet (Position.Container.all, Position.Node),
+                     "Position cursor of Previous is bad");
+
+      declare
+         M : Map renames Position.Container.all;
+
+         Node : constant Count_Type :=
+           Tree_Operations.Previous (M, Position.Node);
+
+      begin
+         if Node = 0 then
+            return No_Element;
+         end if;
+
+         return Cursor'(Position.Container, Node);
+      end;
+   end Previous;
+
+   function Previous
+     (Object   : Iterator;
+      Position : Cursor) return Cursor
+   is
+   begin
+      if Position.Container = null then
+         return No_Element;
+      end if;
+
+      if Checks and then Position.Container /= Object.Container then
+         raise Program_Error with
+           "Position cursor of Previous designates wrong map";
+      end if;
+
+      return Previous (Position);
+   end Previous;
+
+   ----------------------
+   -- Pseudo_Reference --
+   ----------------------
+
+   function Pseudo_Reference
+     (Container : aliased Map'Class) return Reference_Control_Type
+   is
+      TC : constant Tamper_Counts_Access :=
+        Container.TC'Unrestricted_Access;
+   begin
+      return R : constant Reference_Control_Type := (Controlled with TC) do
+         Lock (TC.all);
+      end return;
+   end Pseudo_Reference;
+
+   -------------------
+   -- Query_Element --
+   -------------------
+
+   procedure Query_Element
+     (Position : Cursor;
+      Process  : not null access procedure (Key     : Key_Type;
+                                            Element : Element_Type))
+   is
+   begin
+      if Checks and then Position.Node = 0 then
+         raise Constraint_Error with
+           "Position cursor of Query_Element equals No_Element";
+      end if;
+
+      pragma Assert (Vet (Position.Container.all, Position.Node),
+                     "Position cursor of Query_Element is bad");
+
+      declare
+         M : Map renames Position.Container.all;
+         N : Node_Type renames M.Nodes (Position.Node);
+         Lock : With_Lock (M.TC'Unrestricted_Access);
+      begin
+         Process (N.Key, N.Element);
+      end;
+   end Query_Element;
+
+   ----------
+   -- Read --
+   ----------
+
+   procedure Read
+     (Stream    : not null access Root_Stream_Type'Class;
+      Container : out Map)
+   is
+      procedure Read_Element (Node : in out Node_Type);
+      pragma Inline (Read_Element);
+
+      procedure Allocate is
+         new Tree_Operations.Generic_Allocate (Read_Element);
+
+      procedure Read_Elements is
+         new Tree_Operations.Generic_Read (Allocate);
+
+      ------------------
+      -- Read_Element --
+      ------------------
+
+      procedure Read_Element (Node : in out Node_Type) is
+      begin
+         Key_Type'Read (Stream, Node.Key);
+         Element_Type'Read (Stream, Node.Element);
+      end Read_Element;
+
+   --  Start of processing for Read
+
+   begin
+      Read_Elements (Stream, Container);
+   end Read;
+
+   procedure Read
+     (Stream : not null access Root_Stream_Type'Class;
+      Item   : out Cursor)
+   is
+   begin
+      raise Program_Error with "attempt to stream map cursor";
+   end Read;
+
+   procedure Read
+     (Stream : not null access Root_Stream_Type'Class;
+      Item   : out Reference_Type)
+   is
+   begin
+      raise Program_Error with "attempt to stream reference";
+   end Read;
+
+   procedure Read
+     (Stream : not null access Root_Stream_Type'Class;
+      Item   : out Constant_Reference_Type)
+   is
+   begin
+      raise Program_Error with "attempt to stream reference";
+   end Read;
+
+   ---------------
+   -- Reference --
+   ---------------
+
+   function Reference
+     (Container : aliased in out Map;
+      Position  : Cursor) return Reference_Type
+   is
+   begin
+      if Checks and then Position.Container = null then
+         raise Constraint_Error with
+           "Position cursor has no element";
+      end if;
+
+      if Checks and then Position.Container /= Container'Unrestricted_Access
+      then
+         raise Program_Error with
+           "Position cursor designates wrong map";
+      end if;
+
+      pragma Assert (Vet (Container, Position.Node),
+                     "Position cursor in function Reference is bad");
+
+      declare
+         N : Node_Type renames Container.Nodes (Position.Node);
+         TC : constant Tamper_Counts_Access :=
+           Container.TC'Unrestricted_Access;
+      begin
+         return R : constant Reference_Type :=
+           (Element => N.Element'Access,
+            Control => (Controlled with TC))
+         do
+            Lock (TC.all);
+         end return;
+      end;
+   end Reference;
+
+   function Reference
+     (Container : aliased in out Map;
+      Key       : Key_Type) return Reference_Type
+   is
+      Node : constant Count_Type := Key_Ops.Find (Container, Key);
+
+   begin
+      if Checks and then Node = 0 then
+         raise Constraint_Error with "key not in map";
+      end if;
+
+      declare
+         N : Node_Type renames Container.Nodes (Node);
+         TC : constant Tamper_Counts_Access :=
+           Container.TC'Unrestricted_Access;
+      begin
+         return R : constant Reference_Type :=
+           (Element => N.Element'Access,
+            Control => (Controlled with TC))
+         do
+            Lock (TC.all);
+         end return;
+      end;
+   end Reference;
+
+   -------------
+   -- Replace --
+   -------------
+
+   procedure Replace
+     (Container : in out Map;
+      Key       : Key_Type;
+      New_Item  : Element_Type)
+   is
+      Node : constant Count_Type := Key_Ops.Find (Container, Key);
+
+   begin
+      if Checks and then Node = 0 then
+         raise Constraint_Error with "key not in map";
+      end if;
+
+      TE_Check (Container.TC);
+
+      declare
+         N : Node_Type renames Container.Nodes (Node);
+
+      begin
+         N.Key := Key;
+         N.Element := New_Item;
+      end;
+   end Replace;
+
+   ---------------------
+   -- Replace_Element --
+   ---------------------
+
+   procedure Replace_Element
+     (Container : in out Map;
+      Position  : Cursor;
+      New_Item  : Element_Type)
+   is
+   begin
+      if Checks and then Position.Node = 0 then
+         raise Constraint_Error with
+           "Position cursor of Replace_Element equals No_Element";
+      end if;
+
+      if Checks and then Position.Container /= Container'Unrestricted_Access
+      then
+         raise Program_Error with
+           "Position cursor of Replace_Element designates wrong map";
+      end if;
+
+      TE_Check (Container.TC);
+
+      pragma Assert (Vet (Container, Position.Node),
+                     "Position cursor of Replace_Element is bad");
+
+      Container.Nodes (Position.Node).Element := New_Item;
+   end Replace_Element;
+
+   ---------------------
+   -- Reverse_Iterate --
+   ---------------------
+
+   procedure Reverse_Iterate
+     (Container : Map;
+      Process   : not null access procedure (Position : Cursor))
+   is
+      procedure Process_Node (Node : Count_Type);
+      pragma Inline (Process_Node);
+
+      procedure Local_Reverse_Iterate is
+         new Tree_Operations.Generic_Reverse_Iteration (Process_Node);
+
+      ------------------
+      -- Process_Node --
+      ------------------
+
+      procedure Process_Node (Node : Count_Type) is
+      begin
+         Process (Cursor'(Container'Unrestricted_Access, Node));
+      end Process_Node;
+
+      Busy : With_Busy (Container.TC'Unrestricted_Access);
+
+   --  Start of processing for Reverse_Iterate
+
+   begin
+      Local_Reverse_Iterate (Container);
+   end Reverse_Iterate;
+
+   -----------
+   -- Right --
+   -----------
+
+   function Right (Node : Node_Type) return Count_Type is
+   begin
+      return Node.Right;
+   end Right;
+
+   ---------------
+   -- Set_Color --
+   ---------------
+
+   procedure Set_Color
+     (Node  : in out Node_Type;
+      Color : Color_Type)
+   is
+   begin
+      Node.Color := Color;
+   end Set_Color;
+
+   --------------
+   -- Set_Left --
+   --------------
+
+   procedure Set_Left (Node : in out Node_Type; Left : Count_Type) is
+   begin
+      Node.Left := Left;
+   end Set_Left;
+
+   ----------------
+   -- Set_Parent --
+   ----------------
+
+   procedure Set_Parent (Node : in out Node_Type; Parent : Count_Type) is
+   begin
+      Node.Parent := Parent;
+   end Set_Parent;
+
+   ---------------
+   -- Set_Right --
+   ---------------
+
+   procedure Set_Right (Node : in out Node_Type; Right : Count_Type) is
+   begin
+      Node.Right := Right;
+   end Set_Right;
+
+   --------------------
+   -- Update_Element --
+   --------------------
+
+   procedure Update_Element
+     (Container : in out Map;
+      Position  : Cursor;
+      Process   : not null access procedure (Key     : Key_Type;
+                                             Element : in out Element_Type))
+   is
+   begin
+      if Checks and then Position.Node = 0 then
+         raise Constraint_Error with
+           "Position cursor of Update_Element equals No_Element";
+      end if;
+
+      if Checks and then Position.Container /= Container'Unrestricted_Access
+      then
+         raise Program_Error with
+           "Position cursor of Update_Element designates wrong map";
+      end if;
+
+      pragma Assert (Vet (Container, Position.Node),
+                     "Position cursor of Update_Element is bad");
+
+      declare
+         N : Node_Type renames Container.Nodes (Position.Node);
+         Lock : With_Lock (Container.TC'Unrestricted_Access);
+      begin
+         Process (N.Key, N.Element);
+      end;
+   end Update_Element;
+
+   -----------
+   -- Write --
+   -----------
+
+   procedure Write
+     (Stream    : not null access Root_Stream_Type'Class;
+      Container : Map)
+   is
+      procedure Write_Node
+        (Stream : not null access Root_Stream_Type'Class;
+         Node   : Node_Type);
+      pragma Inline (Write_Node);
+
+      procedure Write_Nodes is
+         new Tree_Operations.Generic_Write (Write_Node);
+
+      ----------------
+      -- Write_Node --
+      ----------------
+
+      procedure Write_Node
+        (Stream : not null access Root_Stream_Type'Class;
+         Node   : Node_Type)
+      is
+      begin
+         Key_Type'Write (Stream, Node.Key);
+         Element_Type'Write (Stream, Node.Element);
+      end Write_Node;
+
+   --  Start of processing for Write
+
+   begin
+      Write_Nodes (Stream, Container);
+   end Write;
+
+   procedure Write
+     (Stream : not null access Root_Stream_Type'Class;
+      Item   : Cursor)
+   is
+   begin
+      raise Program_Error with "attempt to stream map cursor";
+   end Write;
+
+   procedure Write
+     (Stream : not null access Root_Stream_Type'Class;
+      Item   : Reference_Type)
+   is
+   begin
+      raise Program_Error with "attempt to stream reference";
+   end Write;
+
+   procedure Write
+     (Stream : not null access Root_Stream_Type'Class;
+      Item   : Constant_Reference_Type)
+   is
+   begin
+      raise Program_Error with "attempt to stream reference";
+   end Write;
+
+end Ada.Containers.Bounded_Ordered_Maps;