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ClosureExtractor.class.st
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ClosureExtractor.class.st
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"
A ClosureExtractor is a utility class that is used to extract all BlockClosures from a CompiledMethod. It inherits from InstructionClient and understands only one single message, namely that corresponding to the push closure bytecode instruction. Being sent this message, a ClosureExtractor will create a BlockClosure instance and evaluate the block it holds as an instance variable with that closure as parameter.
"
Class {
#name : #ClosureExtractor,
#superclass : #InstructionClient,
#instVars : [
'action',
'scanner',
'currentContext'
],
#category : #'VMMakerCompatibilityForPharo6-Kernel-Methods'
}
{ #category : #'instance creation' }
ClosureExtractor class >> withAction: aBlock andScanner: anInstructionStream [
"The passed block must accept one value, which will be a BlockClosure."
^ self new action: aBlock; scanner: anInstructionStream
]
{ #category : #accessing }
ClosureExtractor >> action [
^ action
]
{ #category : #accessing }
ClosureExtractor >> action: aBlock [
action := aBlock
]
{ #category : #'instruction decoding' }
ClosureExtractor >> blockReturnConstant: value [
currentContext := currentContext sender
]
{ #category : #'instruction decoding' }
ClosureExtractor >> blockReturnTop [
currentContext := currentContext sender
]
{ #category : #'instruction decoding' }
ClosureExtractor >> pushClosureCopyNumCopiedValues: numCopied numArgs: numArgs blockSize: blockSize [
"Create a BlockClosure corresponding to the closure bytecode
and execute the action block with it. The created BlockClosure is only a pseudo value,
it is not populated with meaningful context and argument information."
| block |
block := BlockClosure
outerContext: currentContext
startpc: scanner pc
numArgs: numArgs
copiedValues: (Array new: numCopied)..
currentContext := block asContextWithSender: currentContext.
action value: block
]
{ #category : #'instruction decoding' }
ClosureExtractor >> pushFullClosure: aCompiledBlock numCopied: numCopied [
"Create a BlockClosure corresponding to the closure bytecode
and execute the action block with it. The created BlockClosure is only a pseudo value,
it is not populated with meaningful context and argument information."
| block |
block := FullBlockClosure
receiver: nil
outerContext: currentContext
method: aCompiledBlock
copiedValues: (Array new: numCopied).
currentContext := block asContextWithSender: currentContext.
action value: block
]
{ #category : #accessing }
ClosureExtractor >> scanner [
^ scanner
]
{ #category : #accessing }
ClosureExtractor >> scanner: anInstructionStream [
scanner := anInstructionStream.
currentContext := Context
sender: nil
receiver: nil
method: scanner method
arguments: (Array new: scanner method numArgs)
]