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"
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COPYRIGHT (c) 1994 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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Block subclass:#CheapBlock
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instanceVariableNames:'selfValue method'
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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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CheapBlock comment:'
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COPYRIGHT (c) 1994 by Claus Gittinger
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All Rights Reserved
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328
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$Header: /cvs/stx/stx/libbasic/CheapBlock.st,v 1.5 1995-05-01 21:28:40 claus Exp $
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156
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'!
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!CheapBlock class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1994 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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version
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"
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328
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$Header: /cvs/stx/stx/libbasic/CheapBlock.st,v 1.5 1995-05-01 21:28:40 claus Exp $
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156
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"
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!
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documentation
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"
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222
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CheapBlocks are blocks which do not need their home-context
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(i.e. blocks that do not access any method arguments or method locals).
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156
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Since they have no reference to the home, they must store their
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creating method explicitely - otherwise, the system had no chance of
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finding the source-position of the block.
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Instance variables:
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222
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selfValue <Object> value to use for self if its a copying block
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method <Method> method where block was created
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156
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NOTICE: layout known by runtime system and compiler - do not change
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"
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! !
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!CheapBlock methodsFor:'accessing'!
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selfValue
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"return the copied self"
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^ selfValue
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!
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method
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"return the receivers home method.
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Thats the method where the block was created."
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^ method
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! !
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!CheapBlock methodsFor:'printing & storing'!
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printOn:aStream
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"append a a printed representation of the block to aStream"
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|class selector pair|
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"
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cheap blocks have no home context, but a method instead
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"
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aStream nextPutAll:'[] in '.
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"
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find out, for which class this method was for ...
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"
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method notNil ifTrue:[
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pair := method who.
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pair notNil ifTrue:[
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class := pair at:1.
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selector := pair at:2.
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aStream nextPutAll:(class name , '-' , selector).
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aStream nextPutAll:' (optimized)'.
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^ self
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].
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].
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"
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currently, some cheap blocks don't know where they have been created
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"
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aStream nextPutAll:' ??? (optimized)'.
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^ self
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! !
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