compiler/TScope.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 02 Sep 2015 09:18:00 +0100
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child 13 97090c2baa33
permissions -rw-r--r--
Initial support for inline assembly
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"{ Package: 'jv:tea/compiler' }"
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"{ NameSpace: Smalltalk }"
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Object subclass:#TScope
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	instanceVariableNames:'node parent children variables'
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	classVariableNames:''
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	poolDictionaries:''
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	category:'Languages-Tea-Compiler-Bindings'
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!
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!TScope class methodsFor:'instance creation'!
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node: node
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    ^ self node: node parent: nil.
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    "Created: / 25-08-2015 / 22:28:56 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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node: node parent: parent
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    ^ self new initializeWithNode: node parent: parent
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    "Created: / 25-08-2015 / 22:24:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'accessing'!
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children
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    ^ children ? #()
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    "Modified: / 25-08-2015 / 22:28:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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node
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    ^ node
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!
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parent
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    ^ parent
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! !
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!TScope methodsFor:'initialization'!
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initializeWithNode: n parent: p
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    node := n.
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    parent := p.
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    "Created: / 25-08-2015 / 22:25:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'instance creation'!
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subScope: methodOrBlockNode
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    children isNil ifTrue:[ 
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        children := OrderedCollection new: 5.
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    ].
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    ^ children add: (self class node: methodOrBlockNode parent: self)
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    "Created: / 25-08-2015 / 22:28:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'lookup'!
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addVariable: aTVariableBinding
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    variables isNil ifTrue:[ 
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        variables := OrderedCollection new.
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    ].
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    variables add: aTVariableBinding
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    "Created: / 25-08-2015 / 22:42:29 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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lookupVariable: name
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    ^ variables 
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        detect:[:binding |  binding name = name ] 
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        ifNone:[ parent notNil ifTrue:[ parent lookupVariable: name ] ifFalse:[ self error:'variable not found' ] ]
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    "Created: / 25-08-2015 / 22:58:18 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!TScope methodsFor:'testing'!
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isBlockScope
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    ^ node isBlock
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    "Created: / 02-09-2015 / 08:57:45 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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isMethodScope
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    ^ node isMethod
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    "Created: / 02-09-2015 / 08:58:00 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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