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
|
-------------------------------------------------------------------------------
--
-- Copyright (C) 2009 Stephe Leake
-- Copyright (C) 1999 Ted Dennison
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License as published
-- by the Free Software Foundation; either version 3, or (at your option)
-- any later version. The OpenToken package is distributed in the hope that
-- it will be useful, but WITHOUT 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 the OpenToken
-- package; see file GPL.txt. If not, write to the Free Software Foundation,
-- 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
--
-- As a special exception, if other files instantiate generics from
-- this unit, or you link this unit with other files to produce an
-- executable, this unit does not by itself cause the resulting
-- executable to be covered by the GNU General Public License. This
-- exception does not however invalidate any other reasons why the
-- executable file might be covered by the GNU Public License.
-------------------------------------------------------------------------------
with OpenToken.Token.Enumerated;
with OpenToken.Token.Enumerated.Nonterminal;
with OpenToken.Token.Enumerated.Integer;
with OpenToken.Token.Enumerated.List;
-------------------------------------------------------------------------------
-- This package declares a type for designating an integer literal.
-------------------------------------------------------------------------------
generic
with package Token is new OpenToken.Token.Enumerated (<>);
with package Token_List is new Token.List;
with package Nonterminal is new Token.Nonterminal (Token_List);
with package Integer_Literal is new Token.Integer;
package Simple_Integer_Token is
type Instance is new Nonterminal.Instance with private;
subtype Class is Instance'Class;
type Handle is access all Class;
----------------------------------------------------------------------------
-- Get an integer literal token with the given ID and value.
----------------------------------------------------------------------------
function Get (ID : in Token.Token_ID;
Value : in Integer := 0
) return Instance'Class;
----------------------------------------------------------------------------
-- Return the value of the given integer token.
----------------------------------------------------------------------------
function Value (Subject : in Instance) return Integer;
----------------------------------------------------------------------------
-- Overriding of the default copy synthesization rouine. This routine
-- accepts all token lists whose first element is in Instance'Class, or in
-- Integer_Literal.Instance'Class.
----------------------------------------------------------------------------
overriding procedure Synthesize_By_Copying
(New_Token : out Instance;
Source : in Token.Instance'Class;
To_ID : in Token.Token_ID);
----------------------------------------------------------------------------
-- Routines to synthesize tokens by performing integer ops on the list they
-- reduce from.
--
-- They are valid for any token list whose first and third members are in
-- Instance'Class.
----------------------------------------------------------------------------
Add_Integers : constant Nonterminal.Synthesize;
Multiply_Integers : constant Nonterminal.Synthesize;
----------------------------------------------------------------------------
-- Routine to synthesize a simple integer token from the second token on the
-- production's right hand side.
----------------------------------------------------------------------------
Synthesize_Second : constant Nonterminal.Synthesize;
--------------------------------------------------------------------------
-- Routine to print the value of the given Single interger token.
--------------------------------------------------------------------------
procedure Print_Value (New_Token : out Nonterminal.Class;
Source : in Token_List.Instance'Class;
To_ID : in Token.Token_ID);
private
type Instance is new Nonterminal.Instance with record
Value : Integer;
end record;
----------------------------------------------------------------------------
-- Implementations of routines to synthesize tokens by performing integer
-- ops on the list they reduce from.
--
-- They are valid for any token list whose first and third members are in
-- Instance'Class.
----------------------------------------------------------------------------
procedure Synthesize_Add (New_Token : out Nonterminal.Class;
Source : in Token_List.Instance'Class;
To_ID : in Token.Token_ID);
procedure Synthesize_Multiply (New_Token : out Nonterminal.Class;
Source : in Token_List.Instance'Class;
To_ID : in Token.Token_ID);
----------------------------------------------------------------------------
-- Routine to synthesize a simple integer token from the second token on the
-- production's right hand side.
----------------------------------------------------------------------------
procedure Synthesize_From_Second_Argument (New_Token : out Nonterminal.Class;
Source : in Token_List.Instance'Class;
To_ID : in Token.Token_ID);
Add_Integers : constant Nonterminal.Synthesize := Synthesize_Add'Access;
Multiply_Integers : constant Nonterminal.Synthesize := Synthesize_Multiply'Access;
Synthesize_Second : constant Nonterminal.Synthesize := Synthesize_From_Second_Argument'Access;
end Simple_Integer_Token;
|
