Classes renamed to better express theit purpose.
"{ Package: 'jv:smallsense' }"
"{ NameSpace: SmallSense }"
Object subclass:#SmalltalkInferencer
instanceVariableNames:'class classInfo source parser parserClass tree'
classVariableNames:''
poolDictionaries:''
category:'SmallSense-Smalltalk-Types-Inference'
!
SmalltalkParseNodeVisitor subclass:#Phase1
instanceVariableNames:'classInfo sends types'
classVariableNames:''
poolDictionaries:''
privateIn:SmalltalkInferencer
!
SmalltalkParseNodeVisitor subclass:#Phase2
instanceVariableNames:'classInfo'
classVariableNames:''
poolDictionaries:''
privateIn:SmalltalkInferencer
!
!SmalltalkInferencer class methodsFor:'documentation'!
documentation
"
A heart of SmallSense - a type inferencer. For given class
and method source, instance of inferences walks the parse tree
and annotate each node with inferred type.
[author:]
Jan Vrany <jan.vrany@fit.cvut.cz>
[instance variables:]
[class variables:]
[see also:]
"
! !
!SmalltalkInferencer class methodsFor:'instance creation'!
forClass: class methodSource: source
^self new class: class source: source
"Created: / 26-11-2011 / 12:45:49 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
forClass: class selector: selector
^self new class: class selector: selector.
"Created: / 26-11-2011 / 12:44:48 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
forMethod: method
^self new method: method.
"Created: / 26-11-2011 / 12:45:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer methodsFor:'accessing'!
klass
^ class
"Created: / 26-11-2011 / 17:30:35 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
manager
^Manager instance
"Created: / 27-11-2011 / 16:16:41 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
parser
^ parser
!
parserClass
^ parserClass
!
parserClass:aClass
parserClass := aClass.
!
source
^ source
!
tree
^ tree
! !
!SmalltalkInferencer methodsFor:'initialization'!
class: cls selector: sel
| m |
m := cls >> sel.
m isNil ifTrue:[
self error: 'No method found'.
].
self method: m.
"Created: / 26-11-2011 / 12:47:39 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
class: cls source: src
class := cls.
classInfo := self manager infoForClass: class.
source := src.
"Created: / 26-11-2011 / 14:46:55 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
method: method
self class: method mclass source: method source.
"Created: / 26-11-2011 / 12:48:40 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer methodsFor:'private'!
infer
Phase1 process: tree in: class.
"
(SmallSenseParseNodeInspector new node: tree source: source) open
"
"Created: / 26-11-2011 / 12:51:32 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
parse
parserClass isNil ifTrue:[
parserClass := class parserClass.
].
parser := parserClass
parseMethod: source in: class
ignoreErrors:true
ignoreWarnings:true.
tree := parser tree.
"Created: / 26-11-2011 / 12:51:31 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer methodsFor:'processing'!
process
"Actually infer types. Returns an annotated method tree.
The tree is also stored in an instance variable, so it
may be obtained form receiver any time by asking for #tree."
self parse.
tree notNil ifTrue:[
self infer.
].
^tree
"Created: / 26-11-2011 / 12:50:54 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer::Phase1 methodsFor:'initialization'!
initialize
"Invoked when a new instance is created."
"/ please change as required (and remove this comment)
sends := Dictionary new.
types := Dictionary new.
"/ super initialize. -- commented since inherited method does nothing
"Modified: / 26-11-2011 / 19:31:40 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer::Phase1 methodsFor:'private'!
rootsUnderstanding: selectors
"When the set of selectors is not empty, answer a set of the highest possible classes in the system that implement all the selectors.
When the set of selectors is empty, return the empty set."
| initialClasses nextClasses traverseStack next |
selectors isEmpty ifTrue: [^OrderedCollection new].
nextClasses := OrderedCollection with: Object.
traverseStack := OrderedCollection new: 1000.
selectors
do:
[:selector |
initialClasses := nextClasses.
nextClasses := OrderedCollection new.
initialClasses
do:
[:initialClass |
"inline canUnderstand: for performance"
|cl|
cl := initialClass.
[(cl == nil) or: [(cl methodDictionary includesKey: selector)]] whileFalse: [cl := cl superclass].
(cl == nil)
ifFalse: [nextClasses addLast: initialClass]
ifTrue:
[|size|
traverseStack reset.
traverseStack addLast: initialClass.
size := 1.
"(traverseStack isEmpty) removed for performance"
[size = 0]
whileFalse:
[
"(traverseStack removeFirst) removed for performance"
next := traverseStack removeFirst.
size := size -1.
next
subclassesDo:
[:subcl |
"(subcl includesSelector: selector) removed for performance"
(subcl methodDictionary includesKey: selector)
ifTrue: [nextClasses addLast: subcl]
ifFalse: [traverseStack addLast: subcl. size := size + 1]]]]]].
^nextClasses
"Modified: / 24-11-2010 / 14:39:35 / Jakub <zelenja7@fel.cvut.cz>"
"Modified: / 26-11-2011 / 14:01:32 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified (comment): / 18-09-2013 / 01:22:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer::Phase1 methodsFor:'processing'!
process: tree in: cls
self process: tree in: cls info: (Manager instance infoForClass: cls)
"Created: / 26-11-2011 / 13:48:46 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
process: tree in: cls info: clsInfo
| i c |
class := cls.
classInfo := clsInfo.
"Fill types with cached data..."
c := class.
i := classInfo.
[ c notNil and:[i notNil] ] whileTrue:[
c instVarNames do:[:nm|
types at: nm put: (i infoForInstvar: nm)
].
c := c superclass.
i := i superclassInfo.
].
self visit: tree.
"Now, infer variable types based on collected sends"
sends keysAndValuesDo:[:varName :sentSelectors|
| classes |
classes := self rootsUnderstanding: sentSelectors.
(types at: varName) addClasses: classes.
].
"Created: / 27-11-2011 / 16:22:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer::Phase1 methodsFor:'visiting'!
visitAssignmentNode:anObject
| type |
self visit: anObject variable.
self visit: anObject expression.
type := anObject expression inferedType type.
type isUnknownType ifFalse:[
anObject variable inferedType union: type
].
"Created: / 26-11-2011 / 13:53:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 18-09-2013 / 02:31:08 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitBlockNode:anObject
| type |
super visitBlockNode:anObject.
type := (Type withClass: BlockClosure).
type trustfullness: 100.
anObject inferedType: type.
"Created: / 26-11-2011 / 14:46:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitConstantNode:anObject
"Type of a constant is trivially its value class"
| type |
super visitConstantNode: anObject.
type := (Type withClass: anObject value class).
type trustfullness: 100.
anObject inferedType: type.
"Created: / 26-11-2011 / 13:55:34 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitMessageNode:anObject
| rec |
super visitMessageNode: anObject.
(rec := anObject receiver) isVariableNode ifTrue:[
"We don't have to infer types for global/class variables"
(rec isGlobalVariable or:[rec isClassVariable]) ifFalse:[
(sends at: rec name ifAbsentPut:[Set new]) add: anObject selector.
].
].
"Created: / 26-11-2011 / 13:02:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitSelfNode:anObject
| type |
super visitSelfNode:anObject.
type := Type withClass: class.
type trustfullness: 100.
anObject inferedType:type
"Created: / 26-11-2011 / 14:43:47 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 18-09-2013 / 01:25:59 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitSuperNode:anObject
| type |
super visitSuperNode:anObject.
type := Type withClass: class superclass.
type trustfullness: 100.
anObject inferedType:type
"Created: / 26-11-2011 / 14:44:23 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 18-09-2013 / 01:26:12 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitUnaryNode:anObject
| type sel rec |
super visitUnaryNode:anObject.
sel := anObject selector.
sel == #class ifTrue:[
type := anObject receiver inferedType classSide.
anObject inferedType: type.
^self.
].
(sel == #new or:[sel == #basicNew]) ifTrue:[
rec := anObject receiver.
(rec isSelf and:[class isMetaclass]) ifTrue:[
type := Type withClass: class theNonMetaclass.
type trustfullnessAdd: 50.
anObject inferedType: type.
^self.
].
type := anObject receiver inferedType instanceSide.
anObject inferedType: type.
^self.
].
"Created: / 27-11-2011 / 15:49:39 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
visitVariableNode:anObject
| t |
"Following code ensures, that all variable nodes refering same
variable shares the inferred type"
t := types at: anObject name ifAbsentPut:[Type unknown].
anObject inferedType: t.
anObject isGlobalVariable ifTrue:[
t addClass: (Smalltalk at: anObject name asSymbol) class.
t trustfullness: 100.
^self.
].
anObject isClassVariable ifTrue:[
t addClass: (class theNonMetaclass classVarAt: anObject name asSymbol) class.
t trustfullness: 100.
^self.
].
"Created: / 26-11-2011 / 13:31:19 / Jan Vrany <jan.vrany@fit.cvut.cz>"
"Modified: / 29-08-2013 / 14:00:25 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer::Phase2 methodsFor:'processing'!
process: tree in: cls
self process: tree in: cls info: (Manager instance infoForClass: cls)
"Created: / 26-11-2011 / 13:48:46 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!
process: tree in: cls info: clsInfo
class := cls.
classInfo := clsInfo.
self visit: tree.
"Created: / 27-11-2011 / 16:22:24 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !
!SmalltalkInferencer class methodsFor:'documentation'!
version_HG
^ '$Changeset: <not expanded> $'
!
version_SVN
^ '$Id: SmallSenseInferencer.st 8000 2012-05-17 23:16:11Z vranyj1 $'
! !