author | Claus Gittinger <cg@exept.de> |
Mon, 12 Sep 2011 10:19:41 +0200 | |
changeset 2695 | 28c485e5738e |
parent 2667 | 0a9138168fe8 |
child 3044 | ea354a9e548c |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1989 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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"{ Package: 'stx:libcomp' }" |
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ParseNode subclass:#StatementNode |
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instanceVariableNames:'expression nextStatement lineNr' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'System-Compiler-Support' |
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! |
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!StatementNode class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1989 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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||
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documentation |
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" |
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node for parse-trees, representing statements |
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This is a helper class for the compiler. |
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[author:] |
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Claus Gittinger |
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" |
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! ! |
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!StatementNode class methodsFor:'instance creation'! |
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expression:e |
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^ (self basicNew) expression:e |
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! ! |
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!StatementNode methodsFor:'accessing'! |
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expression |
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^ expression |
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! |
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expression:something |
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expression notNil ifTrue:[expression parent: nil]. |
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expression := something. |
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expression notNil ifTrue:[ |
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expression parent: self. |
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startPosition := expression startPosition. |
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endPosition := expression endPosition. |
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]. |
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"Modified: / 27-07-2011 / 13:51:54 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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"Modified: / 20-08-2011 / 20:00:56 / cg" |
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! |
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isStatement |
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^true. |
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"Created: / 22-02-2011 / 15:04:36 / Jakub <zelenja7@fel.cvut.cz>" |
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! |
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last |
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"return the last statement in a list" |
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|last this| |
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"this could be done more elegant - but with lots of recursion" |
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last := self. |
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this := self. |
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[this notNil] whileTrue:[ |
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last := this. |
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this := this nextStatement |
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]. |
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^ last |
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! |
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lineNumber |
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"return lineNr" |
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lineNr notNil ifTrue:[^ lineNr]. |
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expression notNil ifTrue:[ ^ expression lineNumber ]. |
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nextStatement notNil ifTrue:[^ nextStatement lineNumber]. |
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^ nil |
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"Created: / 14.5.1998 / 19:31:06 / cg" |
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! |
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lineNumber:something |
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"set lineNr" |
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lineNr := something. |
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"Created: / 14.5.1998 / 19:31:11 / cg" |
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! |
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lineNumberOfFirstMessage |
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|lno| |
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lno := self lineNumber. |
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self messagesDo:[:m | lno := lno min:(m lineNumber)]. |
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^ lno |
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! |
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nextStatement |
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^ nextStatement |
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! |
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nextStatement:s |
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nextStatement notNil ifTrue:[nextStatement parent: nil]. |
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nextStatement := s. |
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nextStatement notNil ifTrue:[nextStatement parent: parent]. |
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"Modified: / 20-07-2011 / 21:42:16 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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parent: aParseNode |
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super parent: aParseNode. |
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nextStatement notNil ifTrue:[nextStatement parent: aParseNode]. |
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"Created: / 20-07-2011 / 19:52:29 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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!StatementNode methodsFor:'code generation'! |
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codeAllForSideEffectOn:aStream inBlock:b for:aCompiler |
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|thisStatement| |
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thisStatement := self. |
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[thisStatement notNil] whileTrue:[ |
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thisStatement codeForSideEffectOn:aStream inBlock:b for:aCompiler. |
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thisStatement := thisStatement nextStatement |
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]. |
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! |
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codeForSideEffectOn:aStream inBlock:b for:aCompiler |
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"generate code for this statement - value not needed" |
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expression notNil ifTrue:[ |
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expression codeForSideEffectOn:aStream inBlock:b for:aCompiler |
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] |
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! |
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codeOn:aStream inBlock:b for:aCompiler |
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"generate code for this statement" |
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expression notNil ifTrue:[ |
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expression codeOn:aStream inBlock:b for:aCompiler |
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] |
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! ! |
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!StatementNode methodsFor:'converting'! |
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asCollectionOfStatements |
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"returns a orderedCollection of statements, |
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representing the list of which the receiver is the head" |
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|coll stat| |
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coll := OrderedCollection new. |
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stat := self. |
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[stat notNil] whileTrue:[ |
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stat expression isNil ifTrue:[ |
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] ifFalse:[ |
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coll add:stat. |
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]. |
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stat := stat nextStatement. |
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]. |
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^ coll |
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"Modified: / 12-09-2011 / 10:02:47 / cg" |
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! ! |
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!StatementNode methodsFor:'enumerating'! |
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messagesDo:aBlock |
196 |
|s e| |
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s := self. |
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[s notNil] whileTrue:[ |
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e := s expression. |
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e notNil ifTrue:[e messagesDo:aBlock]. |
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s := s nextStatement |
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]. |
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! |
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||
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nodeDo:anEnumerator |
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"helper for parse tree walking" |
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|stats this expr| |
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"/ too stupid: ST/X statements are linked as a list ... |
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stats := OrderedCollection new. |
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this := self. |
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[this notNil] whileTrue:[ |
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this isReturnNode ifTrue:[ |
217 |
stats add:this |
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] ifFalse:[ |
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expr := this expression. |
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stats add:(expr ? this). |
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]. |
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this := this nextStatement |
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]. |
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^ anEnumerator doSequence:self temporaries:#() statements:stats |
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|
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"Created: 19.6.1997 / 16:45:34 / cg" |
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"Modified: 19.6.1997 / 17:06:47 / cg" |
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! ! |
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!StatementNode methodsFor:'evaluation'! |
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evaluateAllIn:anEnvironment |
140 | 233 |
|lastValue thisStatement| |
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140 | 235 |
"this could be done more elegant - but with lots of recursion" |
236 |
thisStatement := self. |
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237 |
[thisStatement notNil] whileTrue:[ |
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lastValue := thisStatement evaluateExpressionIn:anEnvironment. |
239 |
thisStatement := thisStatement nextStatement |
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140 | 240 |
]. |
241 |
^ lastValue |
|
242 |
! |
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243 |
||
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evaluateExpressionIn:anEnvironment |
245 |
^ expression evaluateIn:anEnvironment |
|
246 |
! |
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247 |
||
248 |
evaluateIn:anEnvironment |
|
249 |
^ self evaluateAllIn:anEnvironment. |
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! ! |
251 |
||
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!StatementNode methodsFor:'printing & storing'! |
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|
254 |
printAllOn:aStream |
|
255 |
self printAllOn:aStream indent:4 |
|
256 |
! |
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257 |
||
258 |
printAllOn:aStream indent:i |
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259 |
|thisStatement| |
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260 |
||
261 |
thisStatement := self. |
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[thisStatement notNil] whileTrue:[ |
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aStream spaces:i. |
264 |
thisStatement printOn:aStream indent:i. |
|
265 |
thisStatement nextStatement notNil ifTrue:[ |
|
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aStream nextPut:$.. |
1379 | 267 |
aStream cr. |
268 |
]. |
|
269 |
thisStatement := thisStatement nextStatement |
|
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] |
140 | 271 |
! |
272 |
||
273 |
printOn:aStream indent:i |
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expression notNil ifTrue:[ expression printOn:aStream indent:i ]. |
0 | 275 |
! ! |
140 | 276 |
|
277 |
!StatementNode methodsFor:'queries'! |
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278 |
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collectBlocksInto:aCollection |
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280 |
|this ex| |
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281 |
|
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282 |
this := self. |
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283 |
[this notNil] whileTrue:[ |
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284 |
ex := this expression. |
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285 |
ex notNil ifTrue:[ |
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286 |
ex collectBlocksInto:aCollection. |
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287 |
]. |
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288 |
this := this nextStatement |
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289 |
]. |
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|
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291 |
"Created: 23.10.1996 / 15:44:13 / cg" |
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292 |
"Modified: 20.4.1997 / 12:10:18 / cg" |
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293 |
! |
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294 |
|
2385 | 295 |
containsReturn |
296 |
^ self expression containsReturn |
|
297 |
! |
|
298 |
||
299 |
containsReturnInAnyStatement |
|
300 |
|s| |
|
301 |
||
302 |
s := self. |
|
303 |
[s notNil] whileTrue:[ |
|
2387 | 304 |
s isReturnNode ifTrue:[^ true]. |
2385 | 305 |
s containsReturn ifTrue:[^ true]. |
306 |
s := s nextStatement. |
|
307 |
]. |
|
308 |
^ false |
|
309 |
! |
|
310 |
||
2065 | 311 |
isSimpleConstant |
140 | 312 |
nextStatement notNil ifTrue:[^ false]. |
313 |
^ expression isConstant |
|
332
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314 |
! |
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|
315 |
|
2103 | 316 |
isSimpleExpression |
317 |
nextStatement notNil ifTrue:[^ false]. |
|
318 |
^ expression notNil |
|
319 |
! |
|
320 |
||
2065 | 321 |
isSimpleVariable |
322 |
nextStatement notNil ifTrue:[^ false]. |
|
323 |
^ expression isVariable |
|
324 |
! |
|
325 |
||
332
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326 |
listEndsWithReturn |
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327 |
|thisStatement lastStatement| |
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|
328 |
|
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|
329 |
thisStatement := self. |
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|
330 |
[thisStatement notNil] whileTrue:[ |
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lastStatement := thisStatement. |
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thisStatement := thisStatement nextStatement |
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]. |
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|
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^ lastStatement isReturnNode |
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|
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"Created: 19.8.1996 / 14:32:47 / cg" |
140 | 338 |
! ! |
339 |
||
2503 | 340 |
!StatementNode methodsFor:'testing'! |
341 |
||
342 |
isStatementNode |
|
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||
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^ true |
|
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||
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"Created: / 13-06-2011 / 11:26:30 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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"Modified: / 13-06-2011 / 14:05:12 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
|
349 |
||
2598 | 350 |
!StatementNode methodsFor:'visiting'! |
351 |
||
352 |
acceptVisitor:aVisitor |
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"Double dispatch back to the visitor, passing my type encoded in |
|
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the selector (visitor pattern)" |
|
355 |
||
356 |
"stub code automatically generated - please change if required" |
|
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||
358 |
^ aVisitor visitStatementNode:self |
|
359 |
! ! |
|
360 |
||
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!StatementNode class methodsFor:'documentation'! |
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|
2503 | 363 |
version_CVS |
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^ '$Header: /cvs/stx/stx/libcomp/StatementNode.st,v 1.43 2011-09-12 08:19:41 cg Exp $' |
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! |
366 |
||
2503 | 367 |
version_SVN |
2598 | 368 |
^ '§ Id §' |
148 | 369 |
! ! |