Smalltalk current createPackage: 'Compiler-AST'! Object subclass: #Node instanceVariableNames: 'parent position nodes shouldBeInlined shouldBeAliased' package: 'Compiler-AST'! !Node commentStamp! I am the abstract root class of the abstract syntax tree. Concrete classes should implement `#accept:` to allow visiting. `position` holds a point containing line and column number of the symbol location in the original source file.! !Node methodsFor: 'accessing'! addNode: aNode self nodes add: aNode. aNode parent: self ! extent "Answer the line and column of the end position of the receiver in the source code" ^ self nextNode ifNil: [ self parent ifNotNil: [ :node | node extent ] ] ifNotNil: [ :node | node position ] ! nextNode ^ self parent ifNotNil: [ :node | node nextNode: self ] ! nextNode: aNode "Answer the next node after aNode" ^ self nodes at: (self nodes indexOf: aNode) + 1 ifAbsent: [ nil ] ! nodes ^nodes ifNil: [nodes := Array new] ! parent ^ parent ! parent: aNode parent := aNode ! position "answer the line and column of the receiver in the source code" ^ position ifNil: [ self parent ifNotNil: [ :node | node position ] ] ! shouldBeAliased ^ shouldBeAliased ifNil: [ false ] ! shouldBeAliased: aBoolean shouldBeAliased := aBoolean ! shouldBeInlined ^ shouldBeInlined ifNil: [ false ] ! shouldBeInlined: aBoolean shouldBeInlined := aBoolean ! ! !Node methodsFor: 'building'! nodes: aCollection nodes := aCollection. aCollection do: [ :each | each parent: self ] ! position: aPosition position := aPosition ! ! !Node methodsFor: 'testing'! isAssignmentNode ^ false ! isBlockNode ^false ! isBlockSequenceNode ^false ! isImmutable ^false ! isJSStatementNode ^ false ! isNode ^ true ! isReturnNode ^false ! isSendNode ^false ! isValueNode ^false ! stopOnStepping ^ false ! subtreeNeedsAliasing ^(self shouldBeAliased or: [ self shouldBeInlined ]) or: [ (self nodes detect: [ :each | each subtreeNeedsAliasing ] ifNone: [ false ]) ~= false ] ! ! !Node methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitNode: self ! ! Node subclass: #AssignmentNode instanceVariableNames: 'left right' package: 'Compiler-AST'! !AssignmentNode commentStamp! I represent an assignment node.! !AssignmentNode methodsFor: 'accessing'! left ^left ! left: aNode left := aNode ! nodes ^ Array with: self left with: self right ! right ^right ! right: aNode right := aNode ! ! !AssignmentNode methodsFor: 'testing'! isAssignmentNode ^ true ! ! !AssignmentNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitAssignmentNode: self ! ! Node subclass: #BlockNode instanceVariableNames: 'parameters scope' package: 'Compiler-AST'! !BlockNode commentStamp! I represent an block closure node.! !BlockNode methodsFor: 'accessing'! parameters ^parameters ifNil: [parameters := Array new] ! parameters: aCollection parameters := aCollection ! scope ^ scope ! scope: aLexicalScope scope := aLexicalScope ! ! !BlockNode methodsFor: 'testing'! isBlockNode ^true ! subtreeNeedsAliasing ^ self shouldBeAliased or: [ self shouldBeInlined ] ! ! !BlockNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitBlockNode: self ! ! Node subclass: #CascadeNode instanceVariableNames: 'receiver' package: 'Compiler-AST'! !CascadeNode commentStamp! I represent an cascade node.! !CascadeNode methodsFor: 'accessing'! receiver ^receiver ! receiver: aNode receiver := aNode ! ! !CascadeNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitCascadeNode: self ! ! Node subclass: #DynamicArrayNode instanceVariableNames: '' package: 'Compiler-AST'! !DynamicArrayNode commentStamp! I represent an dynamic array node.! !DynamicArrayNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitDynamicArrayNode: self ! ! Node subclass: #DynamicDictionaryNode instanceVariableNames: '' package: 'Compiler-AST'! !DynamicDictionaryNode commentStamp! I represent an dynamic dictionary node.! !DynamicDictionaryNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitDynamicDictionaryNode: self ! ! Node subclass: #JSStatementNode instanceVariableNames: 'source' package: 'Compiler-AST'! !JSStatementNode commentStamp! I represent an JavaScript statement node.! !JSStatementNode methodsFor: 'accessing'! source ^source ifNil: [''] ! source: aString source := aString ! ! !JSStatementNode methodsFor: 'testing'! isJSStatementNode ^ true ! ! !JSStatementNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitJSStatementNode: self ! ! Node subclass: #MethodNode instanceVariableNames: 'selector arguments source scope classReferences messageSends superSends' package: 'Compiler-AST'! !MethodNode commentStamp! I represent an method node. A method node must be the root and only method node of a valid AST.! !MethodNode methodsFor: 'accessing'! arguments ^arguments ifNil: [#()] ! arguments: aCollection arguments := aCollection ! classReferences ^ classReferences ! classReferences: aCollection classReferences := aCollection ! extent ^ self source lines size @ (self source lines last size + 1) ! messageSends ^ messageSends ! messageSends: aCollection messageSends := aCollection ! scope ^ scope ! scope: aMethodScope scope := aMethodScope ! selector ^selector ! selector: aString selector := aString ! source ^source ! source: aString source := aString ! superSends ^ superSends ! superSends: aCollection superSends := aCollection ! ! !MethodNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitMethodNode: self ! ! Node subclass: #ReturnNode instanceVariableNames: 'scope' package: 'Compiler-AST'! !ReturnNode commentStamp! I represent an return node. At the AST level, there is not difference between a local return or non-local return.! !ReturnNode methodsFor: 'accessing'! scope ^ scope ! scope: aLexicalScope scope := aLexicalScope ! ! !ReturnNode methodsFor: 'testing'! isReturnNode ^ true ! nonLocalReturn ^ self scope isMethodScope not ! ! !ReturnNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitReturnNode: self ! ! Node subclass: #SendNode instanceVariableNames: 'selector arguments receiver superSend index' package: 'Compiler-AST'! !SendNode commentStamp! I represent an message send node.! !SendNode methodsFor: 'accessing'! arguments ^arguments ifNil: [arguments := #()] ! arguments: aCollection arguments := aCollection. aCollection do: [ :each | each parent: self ] ! cascadeNodeWithMessages: aCollection | first | first := SendNode new selector: self selector; arguments: self arguments; yourself. ^CascadeNode new receiver: self receiver; nodes: (Array with: first), aCollection; yourself ! index ^ index ! index: anInteger index := anInteger ! nodes ^ (Array withAll: self arguments) add: self receiver; yourself ! receiver ^receiver ! receiver: aNode receiver := aNode. aNode isNode ifTrue: [ aNode parent: self ] ! selector ^selector ! selector: aString selector := aString ! superSend ^ superSend ifNil: [ false ] ! superSend: aBoolean superSend := aBoolean ! valueForReceiver: anObject ^SendNode new position: self position; receiver: (self receiver ifNil: [anObject] ifNotNil: [self receiver valueForReceiver: anObject]); selector: self selector; arguments: self arguments; yourself ! ! !SendNode methodsFor: 'testing'! isSendNode ^ true ! stopOnStepping ^ true ! ! !SendNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitSendNode: self ! ! Node subclass: #SequenceNode instanceVariableNames: 'temps scope' package: 'Compiler-AST'! !SequenceNode commentStamp! I represent an sequence node. A sequence represent a set of instructions inside the same scope (the method scope or a block scope).! !SequenceNode methodsFor: 'accessing'! scope ^ scope ! scope: aLexicalScope scope := aLexicalScope ! temps ^temps ifNil: [#()] ! temps: aCollection temps := aCollection ! ! !SequenceNode methodsFor: 'testing'! asBlockSequenceNode ^BlockSequenceNode new position: self position; nodes: self nodes; temps: self temps; yourself ! ! !SequenceNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitSequenceNode: self ! ! SequenceNode subclass: #BlockSequenceNode instanceVariableNames: '' package: 'Compiler-AST'! !BlockSequenceNode commentStamp! I represent an special sequence node for block scopes.! !BlockSequenceNode methodsFor: 'testing'! isBlockSequenceNode ^true ! ! !BlockSequenceNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitBlockSequenceNode: self ! ! Node subclass: #ValueNode instanceVariableNames: 'value' package: 'Compiler-AST'! !ValueNode commentStamp! I represent a value node.! !ValueNode methodsFor: 'accessing'! value ^value ! value: anObject value := anObject ! ! !ValueNode methodsFor: 'testing'! isImmutable ^ self value isImmutable ! isValueNode ^true ! ! !ValueNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitValueNode: self ! ! ValueNode subclass: #VariableNode instanceVariableNames: 'assigned binding' package: 'Compiler-AST'! !VariableNode commentStamp! I represent an variable node.! !VariableNode methodsFor: 'accessing'! alias ^ self binding alias ! assigned ^assigned ifNil: [false] ! assigned: aBoolean assigned := aBoolean ! beAssigned self binding validateAssignment. assigned := true ! binding ^ binding ! binding: aScopeVar binding := aScopeVar ! ! !VariableNode methodsFor: 'testing'! isImmutable ^false ! ! !VariableNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitVariableNode: self ! ! VariableNode subclass: #ClassReferenceNode instanceVariableNames: '' package: 'Compiler-AST'! !ClassReferenceNode commentStamp! I represent an class reference node.! !ClassReferenceNode methodsFor: 'visiting'! accept: aVisitor ^ aVisitor visitClassReferenceNode: self ! ! !Object methodsFor: '*Compiler-AST'! isNode ^ false ! ! !CompiledMethod methodsFor: '*Compiler-AST'! ast self source ifEmpty: [ self error: 'Method source is empty' ]. ^ Smalltalk current parse: self source ! !