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- Smalltalk current createPackage: 'Compiler-Interpreter' properties: #{}!
- NodeVisitor subclass: #ASTInterpreter
- instanceVariableNames: 'currentNode context shouldReturn'
- package: 'Compiler-Interpreter'!
- !ASTInterpreter methodsFor: 'accessing'!
- context
- ^ context
- !
- context: aMethodContext
- context := aMethodContext
- ! !
- !ASTInterpreter methodsFor: 'initialization'!
- initialize
- super initialize.
- shouldReturn := false
- ! !
- !ASTInterpreter methodsFor: 'interpreting'!
- blockValue: anASTBlockClosure
- ^ self interpret: anASTBlockClosure astNode nodes first
- !
- interpret: aNode
- shouldReturn := false.
- ^ self interpretNode: aNode
- !
- interpretNode: aNode
- currentNode := aNode.
- ^ self visit: aNode
- !
- send: aSelector to: anObject arguments: aCollection
- ^ anObject perform: aSelector withArguments: aCollection
- ! !
- !ASTInterpreter methodsFor: 'visiting'!
- visitBlockNode: aNode
- ^ [ self interpretNode: aNode nodes first ]
- !
- visitCascadeNode: aNode
- aNode nodes allButLast
- do: [ :each |
- each receiver: aNode receiver.
- self interpretNode: each ].
-
- aNode nodes last receiver: aNode receiver.
- ^ self interpretNode: aNode nodes last
- !
- visitJSStatementNode: aNode
- self halt
- !
- visitReturnNode: aNode
- shouldReturn := true.
- ^ self interpretNode: aNode nodes first
- !
- visitSendNode: aNode
- "TODO: Handle super sends"
- | receiver arguments |
-
- receiver := self interpretNode: aNode receiver.
- arguments := aNode arguments collect: [ :each |
- self interpretNode: each ].
-
- ^ self send: aNode selector to: receiver arguments: arguments
- !
- visitSequenceNode: aNode
- aNode nodes allButLast do: [ :each | | value |
- value := self interpretNode: each.
- shouldReturn ifTrue: [ ^ value ] ].
- ^ self interpretNode: aNode nodes last
- !
- visitValueNode: aNode
- ^ aNode value
- ! !
- TestCase subclass: #ASTInterpreterTest
- instanceVariableNames: ''
- package: 'Compiler-Interpreter'!
- !ASTInterpreterTest methodsFor: 'accessing'!
- analyze: aNode forClass: aClass
- (SemanticAnalyzer on: aClass) visit: aNode.
- ^ aNode
- !
- interpret: aString
- "the food is a methodNode. Interpret the sequenceNode only"
- ^ ASTInterpreter new
- interpret: (self parse: aString forClass: Object)
- nodes first
- !
- parse: aString
- ^ Smalltalk current parse: aString
- !
- parse: aString forClass: aClass
- ^ self analyze: (self parse: aString) forClass: aClass
- ! !
- !ASTInterpreterTest methodsFor: 'tests'!
- testBinarySend
- self assert: (self interpret: 'foo 2+3+4') equals: 9
- !
- testBlockLiteral
- self assert: (self interpret: 'foo ^ true ifTrue: [ 1 ] ifFalse: [ 2 ]') equals: 1.
- self assert: (self interpret: 'foo true ifTrue: [ ^ 1 ] ifFalse: [ 2 ]') equals: 1.
- self assert: (self interpret: 'foo ^ false ifTrue: [ 1 ] ifFalse: [ 2 ]') equals: 2
- ! !
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