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
|
-- Copyright (C) 2011, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical Algorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--
import initial_-env
namespace BOOTTRAN
module utility (objectMember?, symbolMember?, stringMember?,
charMember?, scalarMember?, listMember?, reverse, reverse!)
--% membership operators
objectMember?(x,l) ==
repeat
l = nil => return false
cons? l =>
sameObject?(x,first l) => return true
l := rest l
return sameObject?(x,l)
symbolMember?(s,l) ==
repeat
l = nil => return false
cons? l =>
symbolEq?(s,first l) => return true
l := rest l
return symbolEq?(s,l)
stringMember?(s,l) ==
repeat
l = nil => return false
cons? l =>
stringEq?(s,first l) => return true
l := rest l
return stringEq?(s,l)
charMember?(c,l) ==
repeat
l = nil => return false
cons? l =>
charEq?(c,first l) => return true
l := rest l
return charEq?(c,l)
scalarMember?(s,l) ==
repeat
l = nil => return false
cons? l =>
scalarEq?(s,first l) => return true
l := rest l
return scalarEq?(s,l)
listMember?(x,l) ==
repeat
l = nil => return false
cons? l =>
listEq?(x,first l) => return true
l := rest l
return listEq?(x,l)
--% list reversal
reverse l ==
r := nil
repeat
cons? l =>
r := [first l,:r]
l := rest l
return r
reverse! l ==
l1 := nil
repeat
cons? l =>
l2 := rest l
l.rest := l1
l1 := l
l := l2
return l1
|
