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
|
(* M2CaseList.def implement ISO case label lists.
Copyright (C) 2009-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 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.
GNU Modula-2 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
along with GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
DEFINITION MODULE M2CaseList ;
(*
Title : M2CaseList
Author : Gaius Mulley
System : GNU Modula-2
Date : Fri Jul 24 09:53:48 2009
Revision : $Version$
Description:
*)
FROM DynamicStrings IMPORT String ;
FROM Lists IMPORT List ;
(*
PushCase - create a case entity and push it to an internal stack.
rec is NulSym if this is a CASE statement.
If rec is a record then it indicates a possible
varients reside in the record to check.
Both rec and va might be NulSym and then the expr
will contain the selector expression to a case statement.
Return the case id.
*)
PROCEDURE PushCase (rec, va, expr: CARDINAL) : CARDINAL ;
(*
PopCase - pop the top element of the case entity from the internal
stack.
*)
PROCEDURE PopCase ;
(*
ElseCase - indicates that this case varient does have an else clause.
*)
PROCEDURE ElseCase (f: CARDINAL) ;
(*
BeginCaseList - create a new label list.
*)
PROCEDURE BeginCaseList (v: CARDINAL) ;
(*
EndCaseList - terminate the current label list.
*)
PROCEDURE EndCaseList ;
(*
AddRange - add a range to the current label list.
*)
PROCEDURE AddRange (r1, r2: CARDINAL; tok: CARDINAL) ;
(*
CaseBoundsResolved - returns TRUE if all constants in the case list, c,
are known to GCC.
*)
PROCEDURE CaseBoundsResolved (tokenno: CARDINAL; c: CARDINAL) : BOOLEAN ;
(*
TypeCaseBounds - returns TRUE if all bounds in case list, c, are
compatible with the tagged type.
*)
PROCEDURE TypeCaseBounds (c: CARDINAL) : BOOLEAN ;
(*
OverlappingCaseBounds - returns TRUE if there were any overlapping bounds
in the case list, c. It will generate an error
messages for each overlapping bound found.
*)
PROCEDURE OverlappingCaseBounds (c: CARDINAL) : BOOLEAN ;
(*
MissingCaseBounds - returns TRUE if there were any missing bounds
in the varient record case list, c. It will
generate an error message for each missing
bounds found.
*)
PROCEDURE MissingCaseBounds (tokenno: CARDINAL; c: CARDINAL) : BOOLEAN ;
(*
MissingCaseStatementBounds - returns TRUE if the case statement has a missing
clause. It will also generate error messages.
*)
PROCEDURE MissingCaseStatementBounds (tokenno: CARDINAL; c: CARDINAL) : BOOLEAN ;
(*
WriteCase - displays the case list.
*)
PROCEDURE WriteCase (c: CARDINAL) ;
END M2CaseList.
|
