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|
"======================================================================
|
| Smalltalk proxy class loader
|
|
======================================================================"
"======================================================================
|
| Copyright 2001, 2002 Free Software Foundation, Inc.
| Written by Paolo Bonzini.
|
| This file is part of GNU Smalltalk.
|
| GNU Smalltalk is free software; you can redistribute it and/or modify it
| under the terms of the GNU General Public License as published by the Free
| Software Foundation; either version 2, or (at your option) any later version.
|
| GNU Smalltalk is distributed in the hope that it will be useful, but WITHOUT
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
| details.
|
| You should have received a copy of the GNU General Public License along with
| GNU Smalltalk; see the file COPYING. If not, write to the Free Software
| Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
======================================================================"
RBParser subclass: #STInterpreter
instanceVariableNames: 'currentClass
'
classVariableNames: ''
poolDictionaries: ''
category: 'System-Compiler'
!
STInterpreter class
instanceVariableNames: 'evaluationMethods'
!
STInterpreter comment:
'This class does simple interpretation of the chunks that make up a
file-in.'!
STInterpreter subclass: #STClassLoader
instanceVariableNames: 'loadedClasses proxies currentCategory currentNamespace'
classVariableNames: ''
poolDictionaries: 'STClassLoaderObjects'
category: 'System-Compiler'
!
STClassLoader comment:
'This class creates non-executable proxies for the classes it loads in.
It does not work if classes are created dynamically, but otherwise it
does it job well.'!
!STInterpreter class methodsFor: 'accessing'!
evaluationMethods
^evaluationMethods!
toEvaluate: interpretedSelector perform: selector
evaluationMethods isNil
ifTrue: [ evaluationMethods := IdentityDictionary new ].
evaluationMethods at: interpretedSelector put: selector! !
!STInterpreter methodsFor: 'overrides'!
evaluateStatement: node
| receiver selector argumentNodes |
node arguments size = 0 ifTrue: [ ^self ].
receiver := node receiver.
selector := node selector.
argumentNodes := node arguments.
self class evaluationMethods at: selector ifPresent: [ :method |
self
perform: method
with: receiver
with: selector
with: argumentNodes ].
!
evaluate: node
node statements do: [ :each |
each isMessage ifTrue: [ self evaluateStatement: each ]
].
^currentClass notNil
! !
!STClassLoader class methodsFor: 'accessing'!
initialize
self
toEvaluate: #subclass:instanceVariableNames:classVariableNames:poolDictionaries:category:
perform: #doSubclass:selector:arguments:;
toEvaluate: #variableSubclass:instanceVariableNames:classVariableNames:poolDictionaries:category:
perform: #doSubclass:selector:arguments:;
toEvaluate: #variableWordSubclass:instanceVariableNames:classVariableNames:poolDictionaries:category:
perform: #doSubclass:selector:arguments:;
toEvaluate: #variableByteSubclass:instanceVariableNames:classVariableNames:poolDictionaries:category:
perform: #doSubclass:selector:arguments:;
toEvaluate: #methodsFor:
perform: #doMethodsFor:selector:arguments:;
toEvaluate: #addSubspace:
perform: #doAddNamespace:selector:arguments:;
toEvaluate: #current:
perform: #doSetNamespace:selector:arguments:;
toEvaluate: #comment:
perform: #doComment:selector:arguments:;
toEvaluate: #instanceVariableNames:
perform: #doClassInstVars:selector:arguments:
! !
!STClassLoader class methodsFor: 'instance creation'!
new
^self basicNew initialize
! !
!STClassLoader methodsFor: 'accessing'!
currentNamespace
^currentNamespace!
currentNamespace: ns
currentNamespace := ns!
proxyForNamespace: anObject
^proxies at: anObject ifAbsentPut: [
ProxyNamespace on: anObject for: self ]!
proxyForClass: anObject
^proxies at: anObject ifAbsentPut: [
ProxyClass on: anObject for: self ]! !
!STClassLoader methodsFor: 'initializing'!
initialize
loadedClasses := OrderedCollection new.
proxies := IdentityDictionary new.
currentNamespace := self proxyForNamespace: Namespace current.
! !
!STClassLoader methodsFor: 'overrides'!
result
"This is what #parseSmalltalk answers"
^loadedClasses
!
endMethodList
currentClass := nil
!
compile: node
currentClass methodDictionary
at: node selector asSymbol
put: (LoadedMethod
category: currentCategory
source: node source)
! !
!STClassLoader methodsFor: 'evaluating statements'!
doSubclass: receiver selector: selector arguments: argumentNodes
| class arguments newClass |
(argumentNodes allSatisfy: [ :each | each isLiteral ])
ifFalse: [ ^self ].
class := self resolveClass: receiver.
arguments := argumentNodes collect: [ :each | each value ].
newClass := class perform: selector withArguments: arguments asArray.
loadedClasses add: newClass.
proxies at: newClass put: newClass
!
doComment: receiver selector: selector arguments: argumentNodes
| class |
(argumentNodes allSatisfy: [ :each | each isLiteral ])
ifFalse: [ ^self ].
class := self resolveClass: receiver.
class comment: argumentNodes first value.
!
doClassInstVars: receiver selector: selector arguments: argumentNodes
| class |
(argumentNodes allSatisfy: [ :each | each isLiteral ])
ifFalse: [ ^self ].
receiver isMessage ifFalse: [ ^self ].
receiver selector = #class ifFalse: [ ^self ].
class := self resolveClass: receiver.
class instanceVariableNames: argumentNodes first value.
!
doSetNamespace: receiver selector: selector arguments: argumentNodes
| ns |
receiver isVariable ifFalse: [ ^self ].
receiver name = 'Namespace' ifFalse: [ ^self ].
ns := self resolveNamespace: argumentNodes first.
self currentNamespace: ns
!
doAddNamespace: receiver selector: selector arguments: argumentNodes
| root |
(argumentNodes allSatisfy: [ :each | each isLiteral ])
ifFalse: [ ^self ].
root := self resolveNamespace: receiver.
root addSubspace: argumentNodes first value.
!
doMethodsFor: receiver selector: selector arguments: argumentNodes
| class |
(argumentNodes allSatisfy: [ :each | each isLiteral ])
ifFalse: [ ^self ].
currentClass := self resolveClass: receiver.
currentCategory := argumentNodes first value
!
resolveClass: node
| object |
(node isMessage and: [ node selector = #class ])
ifTrue: [ ^(self resolveClass: node receiver) asMetaclass ].
object := self resolveName: node.
object isClass ifFalse: [ ^object ].
^self proxyForClass: object
!
resolveNamespace: node
| object |
object := self resolveName: node.
object isNamespace ifFalse: [ ^object ].
^self proxyForNamespace: object
!
resolveName: node
| current selectors |
node isVariable
ifTrue: [
^(node name substrings: $.)
inject: self currentNamespace
into: [ :current :each | current at: each asSymbol ]
].
current := node.
selectors := OrderedCollection new.
[ current isMessage ] whileTrue: [
selectors addFirst: current selector printNl.
current := current receiver
].
selectors addAllFirst: (current name printNl substrings: $.).
^selectors
inject: self currentNamespace
into: [ :current :each | current at: each asSymbol ]
! !
STClassLoader initialize!
|
