author | Jan Vrany <jan.vrany@labware.com> |
Thu, 25 Mar 2021 20:30:03 +0000 | |
branch | jv |
changeset 25411 | 248600ba8fd9 |
parent 25396 | d6cc2bdc7773 |
child 25433 | c46176ba6ce2 |
permissions | -rw-r--r-- |
1 | 1 |
" |
2 |
COPYRIGHT (c) 1993 by Claus Gittinger |
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Fix `BlockContext >> method` for cheap-block contexts
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COPYRIGHT (c) 2020 LabWare |
165 | 4 |
All Rights Reserved |
1 | 5 |
|
6 |
This software is furnished under a license and may be used |
|
7 |
only in accordance with the terms of that license and with the |
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8 |
inclusion of the above copyright notice. This software may not |
|
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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"{ NameSpace: Smalltalk }" |
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Context variableSubclass:#BlockContext |
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subclasses of fixed classes are still possible
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instanceVariableNames:'' |
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subclasses of fixed classes are still possible
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classVariableNames:'' |
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subclasses of fixed classes are still possible
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poolDictionaries:'' |
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category:'Kernel-Methods' |
1 | 22 |
! |
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||
88 | 24 |
!BlockContext class methodsFor:'documentation'! |
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||
26 |
copyright |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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Fix `BlockContext >> method` for cheap-block contexts
Jan Vrany <jan.vrany@labware.com>
parents:
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|
29 |
COPYRIGHT (c) 2020 LabWare |
165 | 30 |
All Rights Reserved |
1 | 31 |
|
88 | 32 |
This software is furnished under a license and may be used |
33 |
only in accordance with the terms of that license and with the |
|
34 |
inclusion of the above copyright notice. This software may not |
|
35 |
be provided or otherwise made available to, or used by, any |
|
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other person. No title to or ownership of the software is |
|
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hereby transferred. |
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" |
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! |
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|
88 | 41 |
documentation |
42 |
" |
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8666 | 43 |
BlockContexts represent the stack context objects of blocks. |
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The layout is the same as for other contexts - this class has been added |
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to avoid a flag in an instance variable. |
46 |
(has become necessary with cheap blocks, which have no home). |
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||
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WARNING: layout and size known by compiler and runtime system - |
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do not change. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Context Block Method |
56 |
Exception Signal |
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" |
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! ! |
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!BlockContext methodsFor:'accessing'! |
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canReturn |
63 |
"return true, if the receiver allows returning through it. |
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For normal method contexts, this normally returns true; |
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for blocks, it (currently) always returns false." |
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^ false |
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! |
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guessedHome |
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"a temporary kludge: optimized block contexts do (currently) not provide |
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any home info. The code below tries to guess the home." |
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|sender tryVars selSender possibleBlocks method| |
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(home isNil or:[home isContext not]) ifTrue:[ |
8666 | 77 |
(sender := self sender) notNil ifTrue:[ |
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tryVars := false. |
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(selSender := sender selector) notNil ifTrue:[ |
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(selSender endsWith:'do:') ifTrue:[ |
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tryVars := true. |
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] ifFalse:[ |
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(selSender endsWith:'Do:') ifTrue:[ |
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tryVars := true. |
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] |
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] |
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]. |
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tryVars ifTrue:[ |
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possibleBlocks := sender argsAndVars select:[:v | v isBlock]. |
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possibleBlocks := possibleBlocks select:[:b | b home isNil]. |
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possibleBlocks size == 1 ifTrue:[ |
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method := possibleBlocks first method. |
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^ method. |
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]. |
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] |
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]. |
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]. |
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^ nil |
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! |
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home |
103 |
"return the immediate home of the receiver. |
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normally this is the methodcontext, where the block was created, |
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for nested block contexts, this is the surrounding blocks context." |
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107 |
home isContext ifFalse:[^ nil]. "copying blocks have no home" |
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^ home |
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! |
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||
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Add #homeReceiver (as in ST80).
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homeReceiver |
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Add #homeReceiver (as in ST80).
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"return the receiver from the context, where the receiver was defined" |
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Add #homeReceiver (as in ST80).
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113 |
|
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Add #homeReceiver (as in ST80).
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home isContext ifFalse:[^ nil]. "copying blocks have no home" |
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Add #homeReceiver (as in ST80).
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^ home receiver |
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Add #homeReceiver (as in ST80).
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|
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Add #homeReceiver (as in ST80).
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"Created: / 5.3.1998 / 16:20:31 / stefan" |
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! |
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Add #homeReceiver (as in ST80).
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method |
121 |
"return the method in which the current contexts block was created." |
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360 | 122 |
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623 | 123 |
home notNil ifTrue:[^ home method]. |
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124 |
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"/ Note: for BlockContext, `method` instvar holds |
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126 |
"/ on Block (or CheapBlock) instead... |
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method isBlock ifTrue: [ |
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128 |
^ method homeMethod |
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129 |
]. |
14213 | 130 |
^ super method |
131 |
||
132 |
"Modified: / 19-07-2012 / 10:58:55 / cg" |
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"Modified: / 09-07-2020 / 21:06:53 / Jan Vrany <jan.vrany@labware.com>" |
360 | 134 |
! |
135 |
||
1 | 136 |
methodHome |
137 |
"return the method-home for block contexts" |
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138 |
||
139 |
|con h| |
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140 |
||
15267 | 141 |
home isNil ifTrue:[^ nil]. |
1 | 142 |
home isContext ifFalse:[^ nil]. "copying blocks have no method home" |
143 |
||
15267 | 144 |
con := self. |
1 | 145 |
h := home. |
15267 | 146 |
[h notNil] whileTrue:[ |
15220 | 147 |
con := h. |
148 |
h := con home |
|
15267 | 149 |
]. |
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^ con |
151 |
! |
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152 |
||
153 |
selector |
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154 |
"return the selector of the context - which is one of the value |
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selectors. This selector is not found in the context, but synthesized." |
1 | 156 |
|
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|nargs| |
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158 |
||
18433 | 159 |
nargs := self argumentCount. |
1 | 160 |
(nargs == 0) ifTrue:[^ #value]. |
161 |
(nargs == 1) ifTrue:[^ #value:]. |
|
162 |
(nargs == 2) ifTrue:[^ #value:value:]. |
|
163 |
(nargs == 3) ifTrue:[^ #value:value:value:]. |
|
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(nargs == 4) ifTrue:[^ #value:value:value:value:]. |
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165 |
(nargs == 5) ifTrue:[^ #value:value:value:value:value:]. |
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(nargs == 6) ifTrue:[^ #value:value:value:value:value:value:]. |
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(nargs == 7) ifTrue:[^ #value:value:value:value:value:value:value:]. |
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(nargs == 8) ifTrue:[^ #value:value:value:value:value:value:value:value:]. |
15454 | 169 |
(nargs == 9) ifTrue:[^ #value:value:value:value:value:value:value:value:value:]. |
170 |
(nargs == 10) ifTrue:[^ #value:value:value:value:value:value:value:value:value:value:]. |
|
171 |
(nargs == 11) ifTrue:[^ #value:value:value:value:value:value:value:value:value:value:value:]. |
|
172 |
(nargs == 12) ifTrue:[^ #value:value:value:value:value:value:value:value:value:value:value:value:]. |
|
1 | 173 |
^ nil |
174 |
! ! |
|
175 |
||
92 | 176 |
!BlockContext methodsFor:'printing & storing'! |
1 | 177 |
|
15382 | 178 |
printReceiverOn:aStream |
179 |
"print a string describing the receiver of the context on aStream |
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357 | 180 |
|
181 |
Since this is also used by the debugger(s), be very careful to |
|
281 | 182 |
return something useful, even in case internals of the system |
183 |
got corrupted ... (i.e. avoid messageNotUnderstood here)" |
|
184 |
||
15382 | 185 |
|cls who mHome m className homeSel| |
357 | 186 |
|
15382 | 187 |
home isContext ifFalse:[ |
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" |
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189 |
mhmh - an optimized blocks context |
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190 |
should get the block here, and get the method from |
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191 |
that one ... |
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192 |
... but in 2.x, there is no easy way to get to the block |
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193 |
since that one is not in the context. |
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194 |
Starting with 3.x, the new block calling scheme will fix this. |
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195 |
" |
241 | 196 |
|
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197 |
"temporary kludge - peek into the sender context. |
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198 |
If its a do-like method and there is a single block variable |
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199 |
in the args or temporaries, that must be the one. |
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|
200 |
This helps in some cases. |
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201 |
" |
14213 | 202 |
m := self method. |
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|
203 |
m isNil ifTrue:[ |
15382 | 204 |
aStream nextPutAll:'[] (optimized) in ???'. |
205 |
] ifFalse:[ |
|
206 |
aStream nextPutAll:'[] in '. |
|
20889 | 207 |
cls := m mclass. |
208 |
cls isNil ifTrue:[ |
|
209 |
cls := m getMclass. |
|
210 |
cls isNil ifTrue:[ |
|
211 |
className := '*Unbound*' |
|
212 |
] ifFalse:[ |
|
213 |
className := '(previously in) ',cls name |
|
214 |
]. |
|
215 |
] ifFalse:[ |
|
216 |
className := cls name. |
|
217 |
]. |
|
218 |
className printOn:aStream. |
|
15382 | 219 |
aStream nextPutAll:'>>'. |
220 |
m selector printOn:aStream. |
|
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|
221 |
]. |
15382 | 222 |
^ self. |
1 | 223 |
]. |
224 |
||
281 | 225 |
mHome := self methodHome. |
226 |
mHome isNil ifTrue:[ |
|
15382 | 227 |
aStream nextPutAll:'[] (no methodHome!!) in ???'. |
228 |
^ self. |
|
281 | 229 |
]. |
230 |
||
293 | 231 |
" |
232 |
kludge to avoid slow search for containing class |
|
233 |
" |
|
15382 | 234 |
homeSel := mHome selector. |
235 |
(homeSel == #doIt or:[homeSel == #doIt:]) ifTrue:[ |
|
11307
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changeset
|
236 |
cls := mHome receiver class. |
15382 | 237 |
homeSel := #doIt. |
293 | 238 |
] ifFalse:[ |
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Print methods: Show message sends as Class >> #selector (with the #),
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parents:
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diff
changeset
|
239 |
m := mHome method. |
98d31040610f
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parents:
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diff
changeset
|
240 |
m isNil ifTrue:[ |
15382 | 241 |
aStream nextPutAll:'[] (no method!!) in ???'. |
242 |
^ self. |
|
11307
98d31040610f
Print methods: Show message sends as Class >> #selector (with the #),
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parents:
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changeset
|
243 |
]. |
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Print methods: Show message sends as Class >> #selector (with the #),
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parents:
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|
244 |
who := m who. |
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|
245 |
who notNil ifTrue:[ |
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|
246 |
cls := who methodClass |
98d31040610f
Print methods: Show message sends as Class >> #selector (with the #),
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diff
changeset
|
247 |
] ifFalse:[ |
98d31040610f
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|
248 |
cls := receiver class. |
98d31040610f
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parents:
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diff
changeset
|
249 |
]. |
241 | 250 |
]. |
1852
89b2328f4203
use new Method>>who interface
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parents:
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diff
changeset
|
251 |
|
89b2328f4203
use new Method>>who interface
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diff
changeset
|
252 |
cls isNil ifTrue:[ |
15382 | 253 |
className := '???(no home class!!)' |
1852
89b2328f4203
use new Method>>who interface
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diff
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|
254 |
] ifFalse:[ |
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|
255 |
className := cls name. |
15382 | 256 |
className isEmptyOrNil ifTrue:[ |
257 |
className := '???(nameless class!!)' |
|
11307
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changeset
|
258 |
] |
281 | 259 |
]. |
15382 | 260 |
aStream nextPutAll:'[] in '; nextPutAll:className; nextPutAll:'>>'. |
261 |
homeSel printOn:aStream. |
|
1444
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fixed homeless-optimized-block printString
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diff
changeset
|
262 |
|
14213 | 263 |
"Modified: / 19-07-2012 / 11:02:41 / cg" |
1 | 264 |
! ! |
623 | 265 |
|
14215 | 266 |
!BlockContext methodsFor:'testing'! |
267 |
||
268 |
isBlockContext |
|
269 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
270 |
||
271 |
^ true |
|
272 |
! |
|
273 |
||
274 |
isCheapBlockContext |
|
275 |
"return true, iff the receiver is a BlockContext, for a cheap block, false otherwise. |
|
276 |
Cheap blocks do not refer to their home" |
|
277 |
||
278 |
^ home isNil |
|
279 |
||
280 |
"Created: / 19-07-2012 / 11:22:23 / cg" |
|
281 |
! ! |
|
282 |
||
1183
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
623
diff
changeset
|
283 |
!BlockContext class methodsFor:'documentation'! |
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
623
diff
changeset
|
284 |
|
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
623
diff
changeset
|
285 |
version |
20889 | 286 |
^ '$Header$' |
14215 | 287 |
! |
288 |
||
289 |
version_CVS |
|
20889 | 290 |
^ '$Header$' |
25396
d6cc2bdc7773
Fix `BlockContext >> method` for cheap-block contexts
Jan Vrany <jan.vrany@labware.com>
parents:
21024
diff
changeset
|
291 |
! |
d6cc2bdc7773
Fix `BlockContext >> method` for cheap-block contexts
Jan Vrany <jan.vrany@labware.com>
parents:
21024
diff
changeset
|
292 |
|
d6cc2bdc7773
Fix `BlockContext >> method` for cheap-block contexts
Jan Vrany <jan.vrany@labware.com>
parents:
21024
diff
changeset
|
293 |
version_HG |
d6cc2bdc7773
Fix `BlockContext >> method` for cheap-block contexts
Jan Vrany <jan.vrany@labware.com>
parents:
21024
diff
changeset
|
294 |
|
d6cc2bdc7773
Fix `BlockContext >> method` for cheap-block contexts
Jan Vrany <jan.vrany@labware.com>
parents:
21024
diff
changeset
|
295 |
^ '$Changeset: <not expanded> $' |
1183
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
623
diff
changeset
|
296 |
! ! |
15220 | 297 |