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[official-gcc.git] / gcc / ada / par-ch8.adb
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- P A R . C H 8 --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2004 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
21 -- --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 -- --
25 ------------------------------------------------------------------------------
27 pragma Style_Checks (All_Checks);
28 -- Turn off subprogram body ordering check. Subprograms are in order
29 -- by RM section rather than alphabetical
31 separate (Par)
32 package body Ch8 is
34 -----------------------
35 -- Local Subprograms --
36 -----------------------
38 function P_Use_Package_Clause return Node_Id;
39 function P_Use_Type_Clause return Node_Id;
41 ---------------------
42 -- 8.4 Use Clause --
43 ---------------------
45 -- USE_CLAUSE ::= USE_PACKAGE_CLAUSE | USE_TYPE_CLAUSE
47 -- The caller has checked that the initial token is USE
49 -- Error recovery: cannot raise Error_Resync
51 function P_Use_Clause return Node_Id is
52 begin
53 Scan; -- past USE
55 if Token = Tok_Type then
56 return P_Use_Type_Clause;
58 else
59 return P_Use_Package_Clause;
60 end if;
61 end P_Use_Clause;
63 -----------------------------
64 -- 8.4 Use Package Clause --
65 -----------------------------
67 -- USE_PACKAGE_CLAUSE ::= use package_NAME {, package_NAME};
69 -- The caller has scanned out the USE keyword
71 -- Error recovery: cannot raise Error_Resync
73 function P_Use_Package_Clause return Node_Id is
74 Use_Node : Node_Id;
76 begin
77 Use_Node := New_Node (N_Use_Package_Clause, Prev_Token_Ptr);
78 Set_Names (Use_Node, New_List);
80 if Token = Tok_Package then
81 Error_Msg_SC ("PACKAGE should not appear here");
82 Scan; -- past PACKAGE
83 end if;
85 loop
86 Append (P_Qualified_Simple_Name, Names (Use_Node));
87 exit when Token /= Tok_Comma;
88 Scan; -- past comma
89 end loop;
91 TF_Semicolon;
92 return Use_Node;
93 end P_Use_Package_Clause;
95 --------------------------
96 -- 8.4 Use Type Clause --
97 --------------------------
99 -- USE_TYPE_CLAUSE ::= use type SUBTYPE_MARK {, SUBTYPE_MARK};
101 -- The caller has checked that the initial token is USE, scanned it out
102 -- and that the current token is TYPE.
104 -- Error recovery: cannot raise Error_Resync
106 function P_Use_Type_Clause return Node_Id is
107 Use_Node : Node_Id;
109 begin
110 Use_Node := New_Node (N_Use_Type_Clause, Prev_Token_Ptr);
111 Set_Subtype_Marks (Use_Node, New_List);
113 if Ada_Version = Ada_83 then
114 Error_Msg_SC ("(Ada 83) use type not allowed!");
115 end if;
117 Scan; -- past TYPE
119 loop
120 Append (P_Subtype_Mark, Subtype_Marks (Use_Node));
121 No_Constraint;
122 exit when Token /= Tok_Comma;
123 Scan; -- past comma
124 end loop;
126 TF_Semicolon;
127 return Use_Node;
128 end P_Use_Type_Clause;
130 -------------------------------
131 -- 8.5 Renaming Declaration --
132 -------------------------------
134 -- Object renaming declarations and exception renaming declarations
135 -- are parsed by P_Identifier_Declaration (3.3.1)
137 -- Subprogram renaming declarations are parsed by P_Subprogram (6.1)
139 -- Package renaming declarations are parsed by P_Package (7.1)
141 -- Generic renaming declarations are parsed by P_Generic (12.1)
143 ----------------------------------------
144 -- 8.5.1 Object Renaming Declaration --
145 ----------------------------------------
147 -- Parsed by P_Identifier_Declarations (3.3.1)
149 ----------------------------------------
150 -- 8.5.2 Exception Renaming Declaration --
151 ----------------------------------------
153 -- Parsed by P_Identifier_Declarations (3.3.1)
155 -----------------------------------------
156 -- 8.5.3 Package Renaming Declaration --
157 -----------------------------------------
159 -- Parsed by P_Package (7.1)
161 --------------------------------------------
162 -- 8.5.4 Subprogram Renaming Declaration --
163 --------------------------------------------
165 -- Parsed by P_Subprogram (6.1)
167 -----------------------------------------
168 -- 8.5.2 Generic Renaming Declaration --
169 -----------------------------------------
171 -- Parsed by P_Generic (12.1)
173 end Ch8;