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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- P A R . C H 8 --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2022, 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. --
-- --
------------------------------------------------------------------------------
pragma Style_Checks (All_Checks);
-- Turn off subprogram body ordering check. Subprograms are in order
-- by RM section rather than alphabetical
separate (Par)
package body Ch8 is
-----------------------
-- Local Subprograms --
-----------------------
procedure Append_Use_Clause
(Item_List : List_Id;
Use_Node : Node_Id;
Is_First : in out Boolean;
Is_Last : in out Boolean);
-- Append a use_clause to the Item_List, appropriately setting the Prev_Ids
-- and More_Ids flags for each split use node. The flags Is_First and
-- Is_Last track position of subtype_marks or names within the original
-- use_clause.
procedure P_Use_Package_Clause (Item_List : List_Id);
procedure P_Use_Type_Clause (Item_List : List_Id);
-----------------------
-- Append_Use_Clause --
-----------------------
procedure Append_Use_Clause
(Item_List : List_Id;
Use_Node : Node_Id;
Is_First : in out Boolean;
Is_Last : in out Boolean)
is
begin
if Token /= Tok_Comma then
if not Is_First then
Set_Prev_Ids (Use_Node);
end if;
Append (Use_Node, Item_List);
Is_Last := True;
else
Set_More_Ids (Use_Node);
if not Is_First then
Set_Prev_Ids (Use_Node);
else
Is_First := False;
end if;
Append (Use_Node, Item_List);
Scan; -- Past comma
end if;
end Append_Use_Clause;
---------------------
-- 8.4 Use Clause --
---------------------
-- USE_CLAUSE ::= USE_PACKAGE_CLAUSE | USE_TYPE_CLAUSE
-- The caller has checked that the initial token is USE
-- Error recovery: cannot raise Error_Resync
procedure P_Use_Clause (Item_List : List_Id) is
begin
Scan; -- past USE
if Token = Tok_Type or else Token = Tok_All then
P_Use_Type_Clause (Item_List);
else
P_Use_Package_Clause (Item_List);
end if;
end P_Use_Clause;
-----------------------------
-- 8.4 Use Package Clause --
-----------------------------
-- USE_PACKAGE_CLAUSE ::= use package_NAME {, package_NAME};
-- The caller has scanned out the USE keyword
-- Error recovery: cannot raise Error_Resync
procedure P_Use_Package_Clause (Item_List : List_Id) is
Is_First : Boolean := True;
Is_Last : Boolean := False;
Use_Node : Node_Id;
Use_Sloc : constant Source_Ptr := Prev_Token_Ptr;
begin
if Token = Tok_Package then
Error_Msg_SC ("PACKAGE should not appear here");
Scan; -- Past PACKAGE
end if;
-- Loop through names in a single use_package_clause, generating an
-- N_Use_Package_Clause node for each name encountered.
loop
Use_Node := New_Node (N_Use_Package_Clause, Use_Sloc);
Set_Name (Use_Node, P_Qualified_Simple_Name);
-- Locally chain each name's use-package node
Append_Use_Clause (Item_List, Use_Node, Is_First, Is_Last);
exit when Is_Last;
end loop;
TF_Semicolon;
end P_Use_Package_Clause;
--------------------------
-- 8.4 Use Type Clause --
--------------------------
-- USE_TYPE_CLAUSE ::= use [ALL] type SUBTYPE_MARK {, SUBTYPE_MARK};
-- The caller has checked that the initial token is USE, scanned it out
-- and that the current token is either ALL or TYPE.
-- Note: Use of ALL is an Ada 2012 feature
-- Error recovery: cannot raise Error_Resync
procedure P_Use_Type_Clause (Item_List : List_Id) is
Use_Sloc : constant Source_Ptr := Prev_Token_Ptr;
All_Present : Boolean;
Is_First : Boolean := True;
Is_Last : Boolean := False;
Use_Node : Node_Id;
begin
if Token = Tok_All then
Error_Msg_Ada_2012_Feature ("|`USE ALL TYPE`", Token_Ptr);
All_Present := True;
Scan; -- Past ALL
if Token /= Tok_Type then
Error_Msg_SC ("TYPE expected");
end if;
else
pragma Assert (Token = Tok_Type);
All_Present := False;
end if;
if Ada_Version = Ada_83 then
Error_Msg_SC ("(Ada 83) use type not allowed!");
end if;
Scan; -- Past TYPE
-- Loop through subtype_marks in one use_type_clause, generating a
-- separate N_Use_Type_Clause node for each subtype_mark encountered.
loop
Use_Node := New_Node (N_Use_Type_Clause, Use_Sloc);
Set_All_Present (Use_Node, All_Present);
Set_Used_Operations (Use_Node, No_Elist);
Set_Subtype_Mark (Use_Node, P_Subtype_Mark);
No_Constraint;
-- Locally chain each subtype_mark's use-type node
Append_Use_Clause (Item_List, Use_Node, Is_First, Is_Last);
exit when Is_Last;
end loop;
TF_Semicolon;
end P_Use_Type_Clause;
-------------------------------
-- 8.5 Renaming Declaration --
-------------------------------
-- Object renaming declarations and exception renaming declarations
-- are parsed by P_Identifier_Declaration (3.3.1)
-- Subprogram renaming declarations are parsed by P_Subprogram (6.1)
-- Package renaming declarations are parsed by P_Package (7.1)
-- Generic renaming declarations are parsed by P_Generic (12.1)
----------------------------------------
-- 8.5.1 Object Renaming Declaration --
----------------------------------------
-- Parsed by P_Identifier_Declarations (3.3.1)
-------------------------------------------
-- 8.5.2 Exception Renaming Declaration --
-------------------------------------------
-- Parsed by P_Identifier_Declarations (3.3.1)
-----------------------------------------
-- 8.5.3 Package Renaming Declaration --
-----------------------------------------
-- Parsed by P_Package (7.1)
--------------------------------------------
-- 8.5.4 Subprogram Renaming Declaration --
--------------------------------------------
-- Parsed by P_Subprogram (6.1)
-----------------------------------------
-- 8.5.2 Generic Renaming Declaration --
-----------------------------------------
-- Parsed by P_Generic (12.1)
end Ch8;
|
