1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                              S E M _ C H 7                               --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-2019, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
19-- http://www.gnu.org/licenses for a complete copy of the license.          --
20--                                                                          --
21-- GNAT was originally developed  by the GNAT team at  New York University. --
22-- Extensive contributions were provided by Ada Core Technologies Inc.      --
23--                                                                          --
24------------------------------------------------------------------------------
25
26with Types; use Types;
27
28package Sem_Ch7 is
29
30   procedure Analyze_Package_Body                       (N : Node_Id);
31   procedure Analyze_Package_Declaration                (N : Node_Id);
32   procedure Analyze_Package_Specification              (N : Node_Id);
33   procedure Analyze_Private_Type_Declaration           (N : Node_Id);
34
35   procedure End_Package_Scope (P : Entity_Id);
36   --  Calls Uninstall_Declarations, and then pops the scope stack
37
38   procedure Exchange_Declarations (Id : Entity_Id);
39   --  Exchange private and full declaration on entry/exit from a package
40   --  declaration or body. The semantic links of the respective nodes
41   --  are preserved in the exchange.
42
43   procedure Install_Visible_Declarations (P : Entity_Id);
44   procedure Install_Private_Declarations (P : Entity_Id);
45
46   --  On entrance to a package body, make declarations in package spec
47   --  immediately visible.
48   --
49   --  When compiling the body of a package, both routines are called in
50   --  succession. When compiling the body of a child package, the call
51   --  to Install_Private_Declaration is immediate for private children,
52   --  but is deferred until the compilation of the private part of the
53   --  child for public child packages.
54
55   function Unit_Requires_Body
56     (Pack_Id            : Entity_Id;
57      Do_Abstract_States : Boolean := False) return Boolean;
58   --  Determine whether package Pack_Id requires a body. A specification needs
59   --  a body if it contains declarations that require completion in the body.
60   --  A non-Ghost [generic] package does not require a body when it declares
61   --  Ghost entities exclusively. When flag Do_Abstract_States is set to True,
62   --  non-null abstract states are considered in determining the need for a
63   --  body.
64
65   procedure May_Need_Implicit_Body (E : Entity_Id);
66   --  If a package declaration contains tasks or RACWs and does not require
67   --  a body, create an implicit body at the end of the current declarative
68   --  part to activate those tasks or contain the bodies for the RACW
69   --  calling stubs.
70
71   procedure New_Private_Type (N : Node_Id; Id : Entity_Id; Def : Node_Id);
72   --  Common processing for private type declarations and for formal private
73   --  type declarations. For private types, N and Def are the type declaration
74   --  node; for formal private types, Def is the formal type definition.
75
76   procedure Uninstall_Declarations (P : Entity_Id);
77   --  At the end of a package declaration or body, declarations in the visible
78   --  part are no longer immediately visible, and declarations in the private
79   --  part are not visible at all. For inner packages, place visible entities
80   --  at the end of their homonym chains. For compilation units, make
81   --  all entities invisible. In both cases, exchange private and visible
82   --  declarations to restore order of elaboration.
83
84end Sem_Ch7;
85