/usr/share/gnu-smalltalk/kernel/Boolean.st is in gnu-smalltalk-common 3.2.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | "======================================================================
|
| Boolean Method Definitions
|
|
======================================================================"
"======================================================================
|
| Copyright 1988,92,94,95,99,2000,2001
| Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of the GNU Smalltalk class library.
|
| The GNU Smalltalk class library is free software; you can redistribute it
| and/or modify it under the terms of the GNU Lesser General Public License
| as published by the Free Software Foundation; either version 2.1, or (at
| your option) any later version.
|
| The GNU Smalltalk class library 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 Lesser
| General Public License for more details.
|
| You should have received a copy of the GNU Lesser General Public License
| along with the GNU Smalltalk class library; see the file COPYING.LIB.
| If not, write to the Free Software Foundation, 59 Temple Place - Suite
| 330, Boston, MA 02110-1301, USA.
|
======================================================================"
Object subclass: Boolean [
<category: 'Language-Data types'>
<comment: 'I have two instances in the Smalltalk system: true and false. I provide
methods that are conditional on boolean values, such as conditional
execution and loops, and conditional testing, such as conditional and and
conditional or. I should say that I appear to provide those operations;
my subclasses True and False actually provide those operations.'>
Boolean class >> isIdentity [
"Answer whether x = y implies x == y for instances of the receiver"
<category: 'testing'>
^true
]
Boolean class >> isImmediate [
"Answer whether, if x is an instance of the receiver, x copy == x"
<category: 'testing'>
^true
]
shallowCopy [
<category: 'overriding'>
^self "We only have one instance"
]
deepCopy [
<category: 'overriding'>
^self "it's about as deep as we need to get"
]
isLiteralObject [
"Answer whether the receiver is expressible as a Smalltalk literal."
<category: 'storing'>
^true
]
storeLiteralOn: aStream [
"Store on aStream some Smalltalk code which compiles to the receiver"
<category: 'storing'>
self storeOn: aStream
]
storeOn: aStream [
"Store on aStream some Smalltalk code which compiles to the receiver"
<category: 'storing'>
self printOn: aStream "representation is the same"
]
asCBooleanValue [
<category: 'C hacks'>
self subclassResponsibility
]
ifTrue: trueBlock ifFalse: falseBlock [
<category: 'basic'>
self subclassResponsibility
]
ifFalse: falseBlock ifTrue: trueBlock [
<category: 'basic'>
self subclassResponsibility
]
ifTrue: trueBlock [
<category: 'basic'>
self subclassResponsibility
]
ifFalse: falseBlock [
<category: 'basic'>
self subclassResponsibility
]
not [
<category: 'basic'>
self subclassResponsibility
]
& aBoolean [
<category: 'basic'>
self subclassResponsibility
]
| aBoolean [
<category: 'basic'>
self subclassResponsibility
]
eqv: aBoolean [
<category: 'basic'>
self subclassResponsibility
]
xor: aBoolean [
<category: 'basic'>
self subclassResponsibility
]
and: aBlock [
<category: 'basic'>
self subclassResponsibility
]
or: aBlock [
<category: 'basic'>
self subclassResponsibility
]
]
|