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188
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'From Smalltalk/X, Version:2.10.8 on 12-feb-1996 at 15:36:51' !
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OrderedCollection subclass:#Stack
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296
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instanceVariableNames:''
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188
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classVariableNames:''
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poolDictionaries:''
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category:'T-gen-Scanning/Parsing'
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!
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!Stack class methodsFor:'instance creation'!
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new
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^self new: 100
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! !
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!Stack methodsFor:'accessing'!
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pop
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"Answer the object on top of the stack."
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^ self removeLast
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"Created: 7.2.1996 / 00:12:53 / stefan"
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"Modified: 7.2.1996 / 00:13:53 / stefan"
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!
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pop: numElem
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"Pop and discard top numElems and answer receiver"
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self removeLast:numElem
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"Created: 7.2.1996 / 00:12:53 / stefan"
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"Modified: 7.2.1996 / 00:14:16 / stefan"
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!
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push: anObject
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"Push anObject onto the top of the stack."
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^ self add:anObject
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"Created: 7.2.1996 / 00:12:53 / stefan"
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"Modified: 7.2.1996 / 00:14:52 / stefan"
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!
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top
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"Answer (without removing) the object on top of the stack."
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^self last
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"Created: 7.2.1996 / 00:12:54 / stefan"
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"Modified: 7.2.1996 / 00:15:26 / stefan"
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! !
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!Stack methodsFor:'enumerating'!
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do: aBlock
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"Evaluate aBlock for each object on the stack, from top to bottom."
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^ super reverseDo:aBlock
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"Created: 7.2.1996 / 00:12:53 / stefan"
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"Modified: 7.2.1996 / 00:16:00 / stefan"
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!
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reverseDo: aBlock
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"Evaluate aBlock for each object on the stack, from bottom to top."
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^ super do:aBlock
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"Created: 7.2.1996 / 00:12:54 / stefan"
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"Modified: 7.2.1996 / 00:16:18 / stefan"
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! !
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