------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                             S E M _ C H 1 0                              --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 1992-2021, 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.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license.          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Types; use Types;

package Sem_Ch10 is
   procedure Analyze_Compilation_Unit                   (N : Node_Id);
   procedure Analyze_With_Clause                        (N : Node_Id);
   procedure Analyze_Subprogram_Body_Stub               (N : Node_Id);
   procedure Analyze_Package_Body_Stub                  (N : Node_Id);
   procedure Analyze_Task_Body_Stub                     (N : Node_Id);
   procedure Analyze_Protected_Body_Stub                (N : Node_Id);
   procedure Analyze_Subunit                            (N : Node_Id);

   procedure Install_Context (N : Node_Id; Chain : Boolean := True);
   --  Installs the entities from the context clause of the given compilation
   --  unit into the visibility chains. This is done before analyzing a unit.
   --  For a child unit, install context of parents as well. The flag Chain is
   --  used to control the "chaining" or linking of use-type and use-package
   --  clauses to avoid circularities when reinstalling context clauses.

   procedure Install_Private_With_Clauses (P : Entity_Id);
   --  Install the private with_clauses of a compilation unit, when compiling
   --  its private part, compiling a private child unit, or compiling the
   --  private declarations of a public child unit.

   function Is_Legal_Shadow_Entity_In_Body (T : Entity_Id) return Boolean;
   --  Assuming that type T is an incomplete type coming from a limited with
   --  view, determine whether the package where T resides is imported through
   --  a regular with clause in the current package body.

   function Is_Visible_Through_Renamings
     (P          : Entity_Id;
      Error_Node : Node_Id := Empty) return Boolean;
   --  Check if some package installed though normal with-clauses has a
   --  renaming declaration of package P. AARM 10.1.2(21/2). Errors are
   --  reported on Error_Node (if present); otherwise no error is reported.

   procedure Load_Needed_Body
     (N          : Node_Id;
      OK         : out Boolean;
      Do_Analyze : Boolean := True);
   --  Load and analyze the body of a context unit that is generic, or that
   --  contains generic units or inlined units. The body becomes part of the
   --  semantic dependency set of the unit that needs it. The returned result
   --  in OK is True if the load is successful, and False if the requested file
   --  cannot be found. If the flag Do_Analyze is false, the unit is loaded and
   --  parsed only. This allows a selective analysis in some inlining cases
   --  where a full analysis would lead so circularities in the back-end.

   procedure Remove_Context (N : Node_Id);
   --  Removes the entities from the context clause of the given compilation
   --  unit from the visibility chains. This is done on exit from a unit as
   --  part of cleaning up the visibility chains for the caller. A special
   --  case is that the call from the Main_Unit can be ignored, since at the
   --  end of the main unit the visibility table won't be needed in any case.
   --  For a child unit, remove parents and their context as well.

   procedure Remove_Private_With_Clauses (Comp_Unit : Node_Id);
   --  The private_with_clauses of a compilation unit are visible in the
   --  private part of a nested package, even if this package appears in
   --  the visible part of the enclosing compilation unit. This Ada 2005
   --  rule imposes extra steps in order to install/remove the private_with
   --  clauses of an enclosing unit.

end Sem_Ch10;