author | Claus Gittinger <cg@exept.de> |
Mon, 23 Aug 1999 19:59:22 +0200 | |
changeset 4623 | f5a12735a692 |
parent 3324 | 0295f7b3b208 |
child 5528 | 2a96dd29ca28 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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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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||
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Context variableSubclass:#BlockContext |
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instanceVariableNames:'' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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||
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!BlockContext class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1993 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
|
29 |
inclusion of the above copyright notice. This software may not |
|
30 |
be provided or otherwise made available to, or used by, any |
|
31 |
other person. No title to or ownership of the software is |
|
32 |
hereby transferred. |
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" |
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! |
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documentation |
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" |
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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. |
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(has become necessary with cheap blocks, which have no home). |
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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 |
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Exception Signal |
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" |
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! ! |
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!BlockContext methodsFor:'accessing'! |
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||
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canReturn |
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"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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home |
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"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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home isContext ifFalse:[^ nil]. "copying blocks have no home" |
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^ home |
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! |
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homeReceiver |
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"return the receiver from the context, where the receiver was defined" |
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|
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home isContext ifFalse:[^ nil]. "copying blocks have no home" |
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^ home receiver |
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|
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Add #homeReceiver (as in ST80).
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|
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"Created: / 5.3.1998 / 16:20:31 / stefan" |
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! |
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isBlockContext |
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"return true, iff the receiver is a BlockContext, false otherwise" |
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^ true |
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! |
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method |
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"return the method in which the current contexts block was created." |
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home notNil ifTrue:[^ home method]. |
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^ nil |
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! |
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methodHome |
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"return the method-home for block contexts" |
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|con h| |
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home isNil ifTrue:[^ nil]. "XXX will change soon" |
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home isContext ifFalse:[^ nil]. "copying blocks have no method home" |
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con := self. |
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h := home. |
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[h notNil] whileTrue:[ |
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con := h. |
108 |
h := con home |
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]. |
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^ con |
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! |
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113 |
selector |
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"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." |
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|nargs| |
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nargs := self numArgs. |
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(nargs == 0) ifTrue:[^ #value]. |
121 |
(nargs == 1) ifTrue:[^ #value:]. |
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(nargs == 2) ifTrue:[^ #value:value:]. |
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(nargs == 3) ifTrue:[^ #value:value:value:]. |
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(nargs == 4) ifTrue:[^ #value:value:value:value:]. |
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(nargs == 5) ifTrue:[^ #value:value:value:value:value:]. |
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^ nil |
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! ! |
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!BlockContext methodsFor:'printing & storing'! |
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receiverPrintString |
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"return a printString describing the contexts receiver. |
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Since this is also used by the debugger(s), be very careful to |
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return something useful, even in case internals of the system |
136 |
got corrupted ... (i.e. avoid messageNotUnderstood here)" |
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|cls who mHome m className sel |
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sender selSender tryVars possibleBlocks method mWho |
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homeSel| |
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(home isNil or:[home isContext not]) ifTrue:[ |
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" |
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mhmh - an optimized blocks context |
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should get the block here, and get the method from |
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that one ... |
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... but in 2.x, there is no easy way to get to the block |
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since that one is not in the context. |
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Starting with 3.x, the new block calling scheme will fix this. |
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" |
241 | 151 |
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"temporary kludge - peek into the sender context. |
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If its a do-like method and there is a single block variable |
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in the args or temporaries, that must be the one. |
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This helps in some cases. |
cb2493aa4d0c
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" |
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(sender := self sender) notNil ifTrue:[ |
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tryVars := false. |
cb2493aa4d0c
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parents:
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159 |
(selSender := sender selector) notNil ifTrue:[ |
cb2493aa4d0c
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160 |
(selSender endsWith:'do:') ifTrue:[ |
cb2493aa4d0c
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161 |
tryVars := true. |
cb2493aa4d0c
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162 |
] ifFalse:[ |
cb2493aa4d0c
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parents:
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163 |
(selSender endsWith:'Do:') ifTrue:[ |
cb2493aa4d0c
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parents:
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|
164 |
tryVars := true. |
cb2493aa4d0c
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165 |
] |
cb2493aa4d0c
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Claus Gittinger <cg@exept.de>
parents:
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diff
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|
166 |
] |
cb2493aa4d0c
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Claus Gittinger <cg@exept.de>
parents:
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diff
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|
167 |
]. |
cb2493aa4d0c
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parents:
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diff
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|
168 |
tryVars ifTrue:[ |
cb2493aa4d0c
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parents:
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|
169 |
possibleBlocks := sender argsAndVars select:[:v | v isBlock]. |
cb2493aa4d0c
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|
170 |
possibleBlocks := possibleBlocks select:[:b | b home isNil]. |
357 | 171 |
|
1444
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|
172 |
possibleBlocks size == 1 ifTrue:[ |
cb2493aa4d0c
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method := possibleBlocks first method. |
cb2493aa4d0c
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174 |
" |
cb2493aa4d0c
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|
175 |
change the line in the upper-listview |
cb2493aa4d0c
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|
176 |
according the information we have now |
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|
177 |
" |
4623 | 178 |
(method isNil |
179 |
or:[(mWho := method who) isNil]) ifTrue:[ |
|
180 |
^ '[] (optimized) in ???'. |
|
1444
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181 |
]. |
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182 |
^ '[] (optimized) in ' , |
1990
210d9bf1e6b4
3.1.3 patch selector -> methodSelector
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183 |
mWho methodClass name , '-' , mWho methodSelector. |
1444
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184 |
]. |
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185 |
] |
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parents:
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|
186 |
]. |
357 | 187 |
|
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parents:
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|
188 |
^ '[] (optimized)' |
1 | 189 |
]. |
190 |
||
281 | 191 |
mHome := self methodHome. |
192 |
mHome isNil ifTrue:[ |
|
2128 | 193 |
'BlockContext [warning]: no methodHome' errorPrintCR. |
1444
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parents:
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|
194 |
^ '[] in ???' |
281 | 195 |
]. |
196 |
||
293 | 197 |
" |
198 |
kludge to avoid slow search for containing class |
|
199 |
" |
|
2157
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|
200 |
((homeSel := mHome selector) == #doIt |
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parents:
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|
201 |
or:[homeSel == #doIt:]) ifTrue:[ |
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|
202 |
sel := #doIt. |
89b2328f4203
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
203 |
cls := mHome receiver class. |
293 | 204 |
] ifFalse:[ |
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parents:
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|
205 |
m := mHome method. |
cb2493aa4d0c
fixed homeless-optimized-block printString
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parents:
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diff
changeset
|
206 |
m isNil ifTrue:[ |
2128 | 207 |
'BlockContext [warning]: no method' errorPrintCR. |
1444
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parents:
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changeset
|
208 |
^ '[] in ???' |
cb2493aa4d0c
fixed homeless-optimized-block printString
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
209 |
]. |
cb2493aa4d0c
fixed homeless-optimized-block printString
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parents:
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diff
changeset
|
210 |
who := m who. |
1852
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|
211 |
who notNil ifTrue:[ |
89b2328f4203
use new Method>>who interface
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parents:
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|
212 |
cls := who methodClass |
89b2328f4203
use new Method>>who interface
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parents:
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|
213 |
] ifFalse:[ |
89b2328f4203
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parents:
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|
214 |
cls := receiver class. |
89b2328f4203
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
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changeset
|
215 |
]. |
2157
436ad20004f4
prepare for #doIt: (with context)
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parents:
2128
diff
changeset
|
216 |
sel := homeSel printString. |
241 | 217 |
]. |
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parents:
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diff
changeset
|
218 |
|
89b2328f4203
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|
219 |
cls isNil ifTrue:[ |
2128 | 220 |
'BlockContext [warning]: no home class' errorPrintCR. |
1444
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|
221 |
className := '???' |
1852
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|
222 |
] ifFalse:[ |
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|
223 |
className := cls name. |
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use new Method>>who interface
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parents:
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|
224 |
className isNil ifTrue:[ |
2128 | 225 |
'BlockContext [warning]: nameless class' errorPrintCR. |
1852
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|
226 |
className := '???' |
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parents:
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|
227 |
] |
281 | 228 |
]. |
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|
229 |
^ '[] in ' , className , '-' , sel |
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|
230 |
|
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parents:
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diff
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|
231 |
"Modified: 10.1.1997 / 21:26:21 / cg" |
1 | 232 |
! ! |
623 | 233 |
|
1183
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
623
diff
changeset
|
234 |
!BlockContext class methodsFor:'documentation'! |
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
235 |
|
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
236 |
version |
4623 | 237 |
^ '$Header: /cvs/stx/stx/libbasic/BlockContext.st,v 1.28 1999-08-23 17:59:22 cg Exp $' |
1183
e3d58d115e53
subclasses of fixed classes are still possible
Claus Gittinger <cg@exept.de>
parents:
623
diff
changeset
|
238 |
! ! |