1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- C O N T R A C T S --
-- --
-- S p e c --
-- --
-- Copyright (C) 2015-2019, 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. --
-- --
------------------------------------------------------------------------------
-- This package contains routines that perform analysis and expansion of
-- various contracts.
with Types; use Types;
package Contracts is
procedure Add_Contract_Item (Prag : Node_Id; Id : Entity_Id);
-- Add pragma Prag to the contract of a constant, entry, entry family,
-- [generic] package, package body, protected unit, [generic] subprogram,
-- subprogram body, variable or task unit denoted by Id. The following are
-- valid pragmas:
--
-- Abstract_State
-- Async_Readers
-- Async_Writers
-- Attach_Handler
-- Constant_After_Elaboration
-- Contract_Cases
-- Depends
-- Effective_Reads
-- Effective_Writes
-- Extensions_Visible
-- Global
-- Initial_Condition
-- Initializes
-- Interrupt_Handler
-- Part_Of
-- Postcondition
-- Precondition
-- Refined_Depends
-- Refined_Global
-- Refined_Post
-- Refined_States
-- Test_Case
-- Volatile_Function
procedure Analyze_Contracts (L : List_Id);
-- Analyze the contracts of all eligible constructs found in list L
procedure Analyze_Entry_Or_Subprogram_Body_Contract (Body_Id : Entity_Id);
-- Analyze all delayed pragmas chained on the contract of entry or
-- subprogram body Body_Id as if they appeared at the end of a declarative
-- region. Pragmas in question are:
--
-- Contract_Cases (stand alone subprogram body)
-- Depends (stand alone subprogram body)
-- Global (stand alone subprogram body)
-- Postcondition (stand alone subprogram body)
-- Precondition (stand alone subprogram body)
-- Refined_Depends
-- Refined_Global
-- Refined_Post
-- Test_Case (stand alone subprogram body)
procedure Analyze_Entry_Or_Subprogram_Contract
(Subp_Id : Entity_Id;
Freeze_Id : Entity_Id := Empty);
-- Analyze all delayed pragmas chained on the contract of entry or
-- subprogram Subp_Id as if they appeared at the end of a declarative
-- region. The pragmas in question are:
--
-- Contract_Cases
-- Depends
-- Global
-- Postcondition
-- Precondition
-- Test_Case
--
-- Freeze_Id is the entity of a [generic] package body or a [generic]
-- subprogram body which "freezes" the contract of Subp_Id.
procedure Analyze_Object_Contract
(Obj_Id : Entity_Id;
Freeze_Id : Entity_Id := Empty);
-- Analyze all delayed pragmas chained on the contract of object Obj_Id as
-- if they appeared at the end of the declarative region. The pragmas to be
-- considered are:
--
-- Async_Readers
-- Async_Writers
-- Depends (single concurrent object)
-- Effective_Reads
-- Effective_Writes
-- Global (single concurrent object)
-- Part_Of
--
-- Freeze_Id is the entity of a [generic] package body or a [generic]
-- subprogram body which "freezes" the contract of Obj_Id.
procedure Analyze_Package_Body_Contract
(Body_Id : Entity_Id;
Freeze_Id : Entity_Id := Empty);
-- Analyze all delayed pragmas chained on the contract of package body
-- Body_Id as if they appeared at the end of a declarative region. The
-- pragmas that are considered are:
--
-- Refined_State
--
-- Freeze_Id is the entity of a [generic] package body or a [generic]
-- subprogram body which "freezes" the contract of Body_Id.
procedure Analyze_Package_Contract (Pack_Id : Entity_Id);
-- Analyze all delayed pragmas chained on the contract of package Pack_Id
-- as if they appeared at the end of a declarative region. The pragmas
-- that are considered are:
--
-- Initial_Condition
-- Initializes
procedure Analyze_Protected_Contract (Prot_Id : Entity_Id);
-- Analyze all delayed pragmas chained on the contract of protected unit
-- Prot_Id if they appeared at the end of a declarative region. Currently
-- there are no such pragmas.
procedure Analyze_Subprogram_Body_Stub_Contract (Stub_Id : Entity_Id);
-- Analyze all delayed pragmas chained on the contract of subprogram body
-- stub Stub_Id as if they appeared at the end of a declarative region. The
-- pragmas in question are:
--
-- Contract_Cases
-- Depends
-- Global
-- Postcondition
-- Precondition
-- Refined_Depends
-- Refined_Global
-- Refined_Post
-- Test_Case
procedure Analyze_Task_Contract (Task_Id : Entity_Id);
-- Analyze all delayed pragmas chained on the contract of task unit Task_Id
-- as if they appeared at the end of a declarative region. The pragmas in
-- question are:
--
-- Depends
-- Global
procedure Create_Generic_Contract (Unit : Node_Id);
-- Create a contract node for a generic package, generic subprogram, or a
-- generic body denoted by Unit by collecting all source contract-related
-- pragmas in the contract of the unit.
procedure Freeze_Previous_Contracts (Body_Decl : Node_Id);
-- Freeze the contracts of all source constructs found in the declarative
-- list which contains entry, package, protected, subprogram, or task body
-- denoted by Body_Decl. In addition, freeze the contract of the nearest
-- enclosing package body.
procedure Inherit_Subprogram_Contract
(Subp : Entity_Id;
From_Subp : Entity_Id);
-- Inherit relevant contract items from source subprogram From_Subp. Subp
-- denotes the destination subprogram. The inherited items are:
-- Extensions_Visible
-- ??? it would be nice if this routine handles Pre'Class and Post'Class
procedure Instantiate_Subprogram_Contract (Templ : Node_Id; L : List_Id);
-- Instantiate all source pragmas found in the contract of the generic
-- subprogram declaration template denoted by Templ. The instantiated
-- pragmas are added to list L.
procedure Save_Global_References_In_Contract
(Templ : Node_Id;
Gen_Id : Entity_Id);
-- Save all global references found within the aspect specifications and
-- the contract-related source pragmas assocated with generic template
-- Templ. Gen_Id denotes the entity of the analyzed generic copy.
end Contracts;
|
