author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Tue, 11 Oct 2011 16:53:59 +0100 | |
branch | jv |
changeset 17883 | 209190914636 |
parent 17846 | 24edc476ac18 |
child 17892 | d86c8bd5ece3 |
permissions | -rw-r--r-- |
7436 | 1 |
" |
2 |
COPYRIGHT (c) 2003 by eXept Software AG |
|
3 |
All Rights Reserved |
|
4 |
||
5 |
This software is furnished under a license and may be used |
|
6 |
only in accordance with the terms of that license and with the |
|
7 |
inclusion of the above copyright notice. This software may not |
|
8 |
be provided or otherwise made available to, or used by, any |
|
9 |
other person. No title to or ownership of the software is |
|
10 |
hereby transferred. |
|
11 |
" |
|
12 |
||
13 |
"{ Package: 'stx:libbasic' }" |
|
14 |
||
15 |
MetaNumber subclass:#NotANumber |
|
16 |
instanceVariableNames:'' |
|
17 |
classVariableNames:'NaN' |
|
18 |
poolDictionaries:'' |
|
19 |
category:'Magnitude-Numbers' |
|
20 |
! |
|
21 |
||
22 |
!NotANumber class methodsFor:'documentation'! |
|
23 |
||
24 |
copyright |
|
25 |
" |
|
26 |
COPYRIGHT (c) 2003 by eXept Software AG |
|
27 |
All Rights Reserved |
|
28 |
||
29 |
This software is furnished under a license and may be used |
|
30 |
only in accordance with the terms of that license and with the |
|
31 |
inclusion of the above copyright notice. This software may not |
|
32 |
be provided or otherwise made available to, or used by, any |
|
33 |
other person. No title to or ownership of the software is |
|
34 |
hereby transferred. |
|
35 |
" |
|
36 |
! |
|
37 |
||
38 |
documentation |
|
39 |
" |
|
40 |
Represents the two metaNumbers +INF and -INF for non-float classes. |
|
41 |
||
42 |
[author:] |
|
43 |
Claus Gittinger |
|
44 |
||
45 |
[see also:] |
|
46 |
Number Infinity NotANumber |
|
47 |
Float ShortFloat Fraction FixedPoint Integer Complex |
|
48 |
FloatArray DoubleArray |
|
49 |
" |
|
50 |
! ! |
|
51 |
||
52 |
!NotANumber class methodsFor:'instance creation'! |
|
53 |
||
54 |
new |
|
55 |
^ NaN |
|
56 |
! ! |
|
57 |
||
58 |
!NotANumber class methodsFor:'class initialization'! |
|
59 |
||
60 |
initialize |
|
61 |
NaN := self basicNew |
|
62 |
||
63 |
" |
|
64 |
self initialize |
|
65 |
" |
|
66 |
! ! |
|
67 |
||
68 |
!NotANumber methodsFor:'arithmetic'! |
|
69 |
||
70 |
* aNumber |
|
71 |
"Multiply the receiver and the argument and answer with the result." |
|
72 |
||
73 |
^ self |
|
74 |
! |
|
75 |
||
76 |
+ aNumber |
|
77 |
"Add the receiver and the argument and answer with the result." |
|
78 |
||
79 |
^ self |
|
80 |
! |
|
81 |
||
82 |
- aNumber |
|
83 |
"Subtract the argument from the receiver and answer with the result." |
|
84 |
||
85 |
^ self |
|
86 |
! |
|
87 |
||
88 |
/ aNumber |
|
89 |
"Divide the receiver by the argument and answer with the result." |
|
90 |
||
91 |
^ self |
|
92 |
! ! |
|
93 |
||
94 |
!NotANumber methodsFor:'comparing'! |
|
95 |
||
96 |
= something |
|
7471 | 97 |
"return true, if the argument represents the same numeric value |
98 |
as the receiver, false otherwise." |
|
99 |
||
7436 | 100 |
something respondsToArithmetic ifTrue:[ ^ something isNaN ]. |
101 |
^ false. |
|
102 |
! ! |
|
103 |
||
104 |
!NotANumber methodsFor:'double dispatching'! |
|
105 |
||
106 |
differenceFromSomeNumber:aNumber |
|
107 |
"sent from aNumber-self, if aNumber does not know how to handle this" |
|
108 |
||
109 |
^ self |
|
110 |
! |
|
111 |
||
112 |
lessFromSomeNumber:aNumber |
|
113 |
"sent from aNumber < self, if aNumber does not know how to handle this" |
|
114 |
||
115 |
^ Number |
|
116 |
raise: #undefinedResultSignal |
|
117 |
receiver: self |
|
118 |
selector: #lessFromSomeNumber: |
|
119 |
errorString: 'Cannot compare against NaN' |
|
120 |
! |
|
121 |
||
122 |
productFromSomeNumber:aNumber |
|
123 |
"sent from aNumber*self, if aNumber does not know how to handle this" |
|
124 |
||
125 |
^ self |
|
126 |
! |
|
127 |
||
128 |
quotientFromSomeNumber:aNumber |
|
129 |
"Return the quotient of the argument, aNumber and the receiver. |
|
130 |
Sent when aNumber does not know how to divide by the receiver." |
|
131 |
||
132 |
^ self |
|
133 |
! |
|
134 |
||
135 |
sumFromSomeNumber:aNumber |
|
136 |
"sent from aNumber+self, if aNumber does not know how to handle this" |
|
137 |
||
138 |
^ self |
|
139 |
! ! |
|
140 |
||
141 |
!NotANumber methodsFor:'printing'! |
|
142 |
||
143 |
printOn:aStream |
|
144 |
aStream nextPutAll:'NAN' |
|
145 |
! ! |
|
146 |
||
147 |
!NotANumber methodsFor:'testing'! |
|
148 |
||
149 |
isFinite |
|
150 |
^ false |
|
151 |
! |
|
152 |
||
153 |
isNaN |
|
154 |
^ true |
|
155 |
! ! |
|
156 |
||
157 |
!NotANumber class methodsFor:'documentation'! |
|
158 |
||
159 |
version |
|
17883
209190914636
svn:keywords property set correctly
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17846
diff
changeset
|
160 |
^ '$Id: NotANumber.st 10717 2011-10-11 15:53:59Z vranyj1 $' |
7436 | 161 |
! ! |
162 |
||
17846 | 163 |
NotANumber initialize! |