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
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- P A R . C H 8 --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2010, 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 --
-----------------------
function P_Use_Package_Clause return Node_Id;
function P_Use_Type_Clause return Node_Id;
---------------------
-- 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
function P_Use_Clause return Node_Id is
begin
Scan; -- past USE
if Token = Tok_Type or else Token = Tok_All then
return P_Use_Type_Clause;
else
return P_Use_Package_Clause;
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
function P_Use_Package_Clause return Node_Id is
Use_Node : Node_Id;
begin
Use_Node := New_Node (N_Use_Package_Clause, Prev_Token_Ptr);
Set_Names (Use_Node, New_List);
if Token = Tok_Package then
Error_Msg_SC ("PACKAGE should not appear here");
Scan; -- past PACKAGE
end if;
loop
Append (P_Qualified_Simple_Name, Names (Use_Node));
exit when Token /= Tok_Comma;
Scan; -- past comma
end loop;
TF_Semicolon;
return Use_Node;
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
function P_Use_Type_Clause return Node_Id is
Use_Node : Node_Id;
All_Present : Boolean;
begin
if Token = Tok_All then
if Ada_Version < Ada_2012 then
Error_Msg_SC ("|`USE ALL TYPE` is an Ada 2012 feature");
Error_Msg_SC ("\|unit must be compiled with -gnat2012 switch");
end if;
All_Present := True;
Scan; -- past ALL
else
All_Present := False;
end if;
Use_Node := New_Node (N_Use_Type_Clause, Prev_Token_Ptr);
Set_All_Present (Use_Node, All_Present);
Set_Subtype_Marks (Use_Node, New_List);
if Ada_Version = Ada_83 then
Error_Msg_SC ("(Ada 83) use type not allowed!");
end if;
Scan; -- past TYPE
loop
Append (P_Subtype_Mark, Subtype_Marks (Use_Node));
No_Constraint;
exit when Token /= Tok_Comma;
Scan; -- past comma
end loop;
TF_Semicolon;
return Use_Node;
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;
|
