"
COPYRIGHT (c) 1989-93 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
ParseNode subclass:#StatementNode
instanceVariableNames:'expression nextStatement'
classVariableNames:''
poolDictionaries:''
category:'System-Compiler-Support'
!
StatementNode comment:'
COPYRIGHT (c) 1989-93 by Claus Gittinger
All Rights Reserved
$Header: /cvs/stx/stx/libcomp/StatementNode.st,v 1.2 1993-10-13 00:26:18 claus Exp $
'!
!StatementNode class methodsFor:'instance creation'!
expression:e
^ (self basicNew) expression:e
! !
!StatementNode methodsFor:'evaluating'!
evaluateExpression
^ expression evaluate
!
evaluate
|lastValue thisStatement|
"this could be done more elegant - but with lots of recursion"
thisStatement := self.
[thisStatement notNil] whileTrue:[
lastValue := thisStatement evaluateExpression.
thisStatement := thisStatement nextStatement
].
^ lastValue
! !
!StatementNode methodsFor:'code generation'!
codeOn:aStream inBlock:b
"generate code for this statement"
expression codeOn:aStream inBlock:b
!
codeForSideEffectOn:aStream inBlock:b
"generate code for this statement - value not needed"
expression codeForSideEffectOn:aStream inBlock:b
! !
!StatementNode methodsFor:'accessing'!
last
"return the last statement in a list"
|last this|
"this could be done more elegant - but with lots of recursion"
last := self.
this := self.
[this notNil] whileTrue:[
last := this.
this := this nextStatement
].
^ last
!
nextStatement:s
nextStatement := s
!
nextStatement
^ nextStatement
!
expression:e
expression := e
!
expression
^ expression
! !
!StatementNode methodsFor:'printing'!
printOn:aStream indent:i
expression printOn:aStream indent:i.
!
printAllOn:aStream
self printAllOn:aStream indent:4
!
printAllOn:aStream indent:i
|thisStatement|
thisStatement := self.
[thisStatement notNil] whileTrue:[
i timesRepeat:[aStream space].
thisStatement printOn:aStream indent:i.
thisStatement nextStatement notNil ifTrue:[
aStream nextPut:$..
aStream cr.
].
thisStatement := thisStatement nextStatement
]
! !