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Compiler.st
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Compiler.st
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Smalltalk current createPackage: 'Compiler' properties: #{}!
Object subclass: #ChunkParser
instanceVariableNames: 'stream'
package:'Compiler'!
!ChunkParser methodsFor: '*Compiler'!
stream: aStream
stream := aStream
! !
!ChunkParser methodsFor: '*Compiler'!
nextChunk
"The chunk format (Smalltalk Interchange Format or Fileout format)
is a trivial format but can be a bit tricky to understand:
- Uses the exclamation mark as delimiter of chunks.
- Inside a chunk a normal exclamation mark must be doubled.
- A non empty chunk must be a valid Smalltalk expression.
- A chunk on top level with a preceding empty chunk is an instruction chunk:
- The object created by the expression then takes over reading chunks.
This metod returns next chunk as a String (trimmed), empty String (all whitespace) or nil."
| char result chunk |
result := '' writeStream.
[char := stream next.
char notNil] whileTrue: [
char = '!!' ifTrue: [
stream peek = '!!'
ifTrue: [stream next "skipping the escape double"]
ifFalse: [^result contents trimBoth "chunk end marker found"]].
result nextPut: char].
^nil "a chunk needs to end with !!"
! !
!ChunkParser class methodsFor: '*Compiler'!
on: aStream
^self new stream: aStream
! !
Object subclass: #Exporter
instanceVariableNames: ''
package:'Compiler'!
!Exporter methodsFor: '*Compiler'!
exportAll
"Export all packages in the system."
^String streamContents: [:stream |
Smalltalk current packages do: [:pkg |
stream nextPutAll: (self exportPackage: pkg name)]]
!
exportClass: aClass
"Export a single class. Subclasses override these methods."
^String streamContents: [:stream |
self exportDefinitionOf: aClass on: stream.
self exportMethodsOf: aClass on: stream.
self exportMetaDefinitionOf: aClass on: stream.
self exportMethodsOf: aClass class on: stream]
!
exportPackage: packageName
"Export a given package by name."
| package |
^String streamContents: [:stream |
package := Smalltalk current packageAt: packageName.
self exportPackageDefinitionOf: package on: stream.
"Export classes in dependency order.
Update (issue #171): Remove duplicates for export"
package sortedClasses asSet do: [:each |
stream nextPutAll: (self exportClass: each)].
self exportPackageExtensionsOf: package on: stream]
! !
!Exporter methodsFor: '*Compiler'!
classNameFor: aClass
^aClass isMetaclass
ifTrue: [aClass instanceClass name, '.klass']
ifFalse: [
aClass isNil
ifTrue: ['nil']
ifFalse: [aClass name]]
!
exportDefinitionOf: aClass on: aStream
aStream
nextPutAll: 'smalltalk.addClass(';
nextPutAll: '''', (self classNameFor: aClass), ''', ';
nextPutAll: 'smalltalk.', (self classNameFor: aClass superclass);
nextPutAll: ', ['.
aClass instanceVariableNames
do: [:each | aStream nextPutAll: '''', each, '''']
separatedBy: [aStream nextPutAll: ', '].
aStream
nextPutAll: '], ''';
nextPutAll: aClass category, '''';
nextPutAll: ');'.
aClass comment notEmpty ifTrue: [
aStream
lf;
nextPutAll: 'smalltalk.';
nextPutAll: (self classNameFor: aClass);
nextPutAll: '.comment=';
nextPutAll: aClass comment asJavascript].
aStream lf
!
exportMetaDefinitionOf: aClass on: aStream
aClass class instanceVariableNames isEmpty ifFalse: [
aStream
nextPutAll: 'smalltalk.', (self classNameFor: aClass class);
nextPutAll: '.iVarNames = ['.
aClass class instanceVariableNames
do: [:each | aStream nextPutAll: '''', each, '''']
separatedBy: [aStream nextPutAll: ','].
aStream nextPutAll: '];', String lf]
!
exportMethod: aMethod of: aClass on: aStream
aStream
nextPutAll: 'smalltalk.addMethod(';lf;
nextPutAll: aMethod selector asSelector asJavascript, ',';lf;
nextPutAll: 'smalltalk.method({';lf;
nextPutAll: 'selector: ', aMethod selector asJavascript, ',';lf;
nextPutAll: 'category: ''', aMethod category, ''',';lf;
nextPutAll: 'fn: ', aMethod fn compiledSource, ',';lf;
nextPutAll: 'args: ', aMethod arguments asJavascript, ','; lf;
nextPutAll: 'source: ', aMethod source asJavascript, ',';lf;
nextPutAll: 'messageSends: ', aMethod messageSends asJavascript, ',';lf;
nextPutAll: 'referencedClasses: ', aMethod referencedClasses asJavascript.
aStream
lf;
nextPutAll: '}),';lf;
nextPutAll: 'smalltalk.', (self classNameFor: aClass);
nextPutAll: ');';lf;lf
!
exportMethodsOf: aClass on: aStream
"Issue #143: sort methods alphabetically"
((aClass methodDictionary values) sorted: [:a :b | a selector <= b selector]) do: [:each |
(each category match: '^\*') ifFalse: [
self exportMethod: each of: aClass on: aStream]].
aStream lf
!
exportPackageDefinitionOf: package on: aStream
aStream
nextPutAll: 'smalltalk.addPackage(';
nextPutAll: '''', package name, ''', ', package propertiesAsJSON , ');'.
aStream lf
!
exportPackageExtensionsOf: package on: aStream
"Issue #143: sort classes and methods alphabetically"
| name |
name := package name.
(Package sortedClasses: Smalltalk current classes) do: [:each |
{each. each class} do: [:aClass |
((aClass methodDictionary values) sorted: [:a :b | a selector <= b selector]) do: [:method |
(method category match: '^\*', name) ifTrue: [
self exportMethod: method of: aClass on: aStream ]]]]
! !
Exporter subclass: #ChunkExporter
instanceVariableNames: ''
package:'Compiler'!
!ChunkExporter methodsFor: '*Compiler'!
chunkEscape: aString
"Replace all occurrences of !! with !!!! and trim at both ends."
^(aString replace: '!!' with: '!!!!') trimBoth
!
classNameFor: aClass
^aClass isMetaclass
ifTrue: [aClass instanceClass name, ' class']
ifFalse: [
aClass isNil
ifTrue: ['nil']
ifFalse: [aClass name]]
!
exportDefinitionOf: aClass on: aStream
"Chunk format."
aStream
nextPutAll: (self classNameFor: aClass superclass);
nextPutAll: ' subclass: #', (self classNameFor: aClass); lf;
nextPutAll: ' instanceVariableNames: '''.
aClass instanceVariableNames
do: [:each | aStream nextPutAll: each]
separatedBy: [aStream nextPutAll: ' '].
aStream
nextPutAll: ''''; lf;
nextPutAll: ' package: ''', aClass category, '''!!'; lf.
aClass comment notEmpty ifTrue: [
aStream
nextPutAll: '!!', (self classNameFor: aClass), ' commentStamp!!';lf;
nextPutAll: (self chunkEscape: aClass comment), '!!';lf].
aStream lf
!
exportMetaDefinitionOf: aClass on: aStream
aClass class instanceVariableNames isEmpty ifFalse: [
aStream
nextPutAll: (self classNameFor: aClass class);
nextPutAll: ' instanceVariableNames: '''.
aClass class instanceVariableNames
do: [:each | aStream nextPutAll: each]
separatedBy: [aStream nextPutAll: ' '].
aStream
nextPutAll: '''!!'; lf; lf]
!
exportMethod: aMethod of: aClass on: aStream
aStream
lf; lf; nextPutAll: (self chunkEscape: aMethod source); lf;
nextPutAll: '!!'
!
exportMethods: methods category: category of: aClass on: aStream
"Issue #143: sort methods alphabetically"
aStream
nextPutAll: '!!', (self classNameFor: aClass);
nextPutAll: ' methodsFor: ''', category, '''!!'.
(methods sorted: [:a :b | a selector <= b selector]) do: [:each |
self exportMethod: each of: aClass on: aStream].
aStream nextPutAll: ' !!'; lf; lf
!
exportMethodsOf: aClass on: aStream
"Issue #143: sort protocol alphabetically"
| map |
map := Dictionary new.
aClass protocolsDo: [:category :methods |
(category match: '^\*') ifFalse: [ map at: category put: methods ]].
(map keys sorted: [:a :b | a <= b ]) do: [:category | | methods |
methods := map at: category.
self
exportMethods: methods
category: category
of: aClass
on: aStream ]
!
exportPackageDefinitionOf: package on: aStream
"Chunk format."
aStream
nextPutAll: 'Smalltalk current createPackage: ''', package name,
''' properties: ', package properties storeString, '!!'; lf.
!
exportPackageExtensionsOf: package on: aStream
"We need to override this one too since we need to group
all methods in a given protocol under a leading methodsFor: chunk
for that class."
"Issue #143: sort protocol alphabetically"
| name map |
name := package name.
(Package sortedClasses: Smalltalk current classes) do: [:each |
{each. each class} do: [:aClass |
map := Dictionary new.
aClass protocolsDo: [:category :methods |
(category match: '^\*', name) ifTrue: [ map at: category put: methods ]].
(map keys sorted: [:a :b | a <= b ]) do: [:category | | methods |
methods := map at: category.
self exportMethods: methods category: category of: aClass on: aStream ]]]
! !
Exporter subclass: #StrippedExporter
instanceVariableNames: ''
package:'Compiler'!
!StrippedExporter methodsFor: '*Compiler'!
exportDefinitionOf: aClass on: aStream
aStream
nextPutAll: 'smalltalk.addClass(';
nextPutAll: '''', (self classNameFor: aClass), ''', ';
nextPutAll: 'smalltalk.', (self classNameFor: aClass superclass);
nextPutAll: ', ['.
aClass instanceVariableNames
do: [:each | aStream nextPutAll: '''', each, '''']
separatedBy: [aStream nextPutAll: ', '].
aStream
nextPutAll: '], ''';
nextPutAll: aClass category, '''';
nextPutAll: ');'.
aStream lf
!
exportMethod: aMethod of: aClass on: aStream
aStream
nextPutAll: 'smalltalk.addMethod(';lf;
nextPutAll: aMethod selector asSelector asJavascript, ',';lf;
nextPutAll: 'smalltalk.method({';lf;
nextPutAll: 'selector: ', aMethod selector asJavascript, ',';lf;
nextPutAll: 'fn: ', aMethod fn compiledSource;lf;
nextPutAll: '}),';lf;
nextPutAll: 'smalltalk.', (self classNameFor: aClass);
nextPutAll: ');';lf;lf
! !
Object subclass: #Importer
instanceVariableNames: ''
package:'Compiler'!
!Importer methodsFor: '*Compiler'!
import: aStream
| chunk result parser lastEmpty |
parser := ChunkParser on: aStream.
lastEmpty := false.
[chunk := parser nextChunk.
chunk isNil] whileFalse: [
chunk isEmpty
ifTrue: [lastEmpty := true]
ifFalse: [
result := Compiler new evaluateExpression: chunk.
lastEmpty
ifTrue: [
lastEmpty := false.
result scanFrom: parser]]]
! !
Object subclass: #PackageLoader
instanceVariableNames: ''
package:'Compiler'!
!PackageLoader methodsFor: '*Compiler'!
initializePackageNamed: packageName prefix: aString
(Package named: packageName)
setupClasses;
commitPathJs: '/', aString, '/js';
commitPathSt: '/', aString, '/st'
!
loadPackage: packageName prefix: aString
| url |
url := '/', aString, '/js/', packageName, '.js'.
jQuery
ajax: url
options: #{
'type' -> 'GET'.
'dataType' -> 'script'.
'complete' -> [ :jqXHR :textStatus |
jqXHR readyState = 4
ifTrue: [ self initializePackageNamed: packageName prefix: aString ] ].
'error' -> [ window alert: 'Could not load package at: ', url ]
}
!
loadPackages: aCollection prefix: aString
aCollection do: [ :each |
self loadPackage: each prefix: aString ]
! !
!PackageLoader class methodsFor: '*Compiler'!
loadPackages: aCollection prefix: aString
^ self new loadPackages: aCollection prefix: aString
! !
Error subclass: #CompilerError
instanceVariableNames: ''
package:'Compiler'!
!CompilerError commentStamp!
I am the common superclass of all compiling errors.!
CompilerError subclass: #ParseError
instanceVariableNames: ''
package:'Compiler'!
!ParseError commentStamp!
Instance of ParseError are signaled on any parsing error.
See `Smalltalk >> #parse:`!
CompilerError subclass: #SemanticError
instanceVariableNames: ''
package:'Compiler'!
!SemanticError commentStamp!
I represent an abstract semantic error thrown by the SemanticAnalyzer.
Semantic errors can be unknown variable errors, etc.
See my subclasses for concrete errors.
The IDE should catch instances of Semantic error to deal with them when compiling!
SemanticError subclass: #InliningError
instanceVariableNames: ''
package:'Compiler'!
!InliningError commentStamp!
Instances of InliningError are signaled when using an `InliningCodeGenerator`in a `Compiler`.!
SemanticError subclass: #InvalidAssignmentError
instanceVariableNames: 'variableName'
package:'Compiler'!
!InvalidAssignmentError commentStamp!
I get signaled when a pseudo variable gets assigned.!
!InvalidAssignmentError methodsFor: '*Compiler'!
messageText
^ ' Invalid assignment to variable: ', self variableName
!
variableName
^ variableName
!
variableName: aString
variableName := aString
! !
SemanticError subclass: #ShadowingVariableError
instanceVariableNames: 'variableName'
package:'Compiler'!
!ShadowingVariableError commentStamp!
I get signaled when a variable in a block or method scope shadows a variable of the same name in an outer scope.!
!ShadowingVariableError methodsFor: '*Compiler'!
messageText
^ 'Variable shadowing error: ', self variableName, ' is already defined'
!
variableName
^ variableName
!
variableName: aString
variableName := aString
! !
SemanticError subclass: #UnknownVariableError
instanceVariableNames: 'variableName'
package:'Compiler'!
!UnknownVariableError commentStamp!
I get signaled when a variable is not defined.
The default behavior is to allow it, as this is how Amber currently is able to seamlessly send messages to JavaScript objects.!
!UnknownVariableError methodsFor: '*Compiler'!
variableName
^ variableName
!
variableName: aString
variableName := aString
! !
Object subclass: #Compiler
instanceVariableNames: 'currentClass source unknownVariables codeGeneratorClass'
package:'Compiler'!
!Compiler commentStamp!
I provide the public interface for compiling Amber source code into JavaScript.
The code generator used to produce JavaScript can be plugged with `#codeGeneratorClass`.
The default code generator is an instance of `InlinedCodeGenerator`!
!Compiler methodsFor: '*Compiler'!
codeGeneratorClass
^codeGeneratorClass ifNil: [InliningCodeGenerator]
!
codeGeneratorClass: aClass
codeGeneratorClass := aClass
!
currentClass
^currentClass
!
currentClass: aClass
currentClass := aClass
!
source
^source ifNil: ['']
!
source: aString
source := aString
!
unknownVariables
^unknownVariables
!
unknownVariables: aCollection
unknownVariables := aCollection
! !
!Compiler methodsFor: '*Compiler'!
compile: aString
^self compileNode: (self parse: aString)
!
compile: aString forClass: aClass
self currentClass: aClass.
self source: aString.
^self compile: aString
!
compileExpression: aString
self currentClass: DoIt.
self source: 'doIt ^[', aString, '] value'.
^self compileNode: (self parse: self source)
!
compileNode: aNode
| generator result |
generator := self codeGeneratorClass new.
generator
source: self source;
currentClass: self currentClass.
result := generator compileNode: aNode.
self unknownVariables: #().
^result
!
eval: aString
<return eval(aString)>
!
evaluateExpression: aString
"Unlike #eval: evaluate a Smalltalk expression and answer the returned object"
| result |
DoIt addCompiledMethod: (self eval: (self compileExpression: aString)).
result := DoIt new doIt.
DoIt removeCompiledMethod: (DoIt methodDictionary at: 'doIt').
^result
!
install: aString forClass: aBehavior category: anotherString
| compiled |
compiled := self eval: (self compile: aString forClass: aBehavior).
compiled category: anotherString.
aBehavior addCompiledMethod: compiled.
self setupClass: aBehavior.
^compiled
!
parse: aString
^Smalltalk current parse: aString
!
parseExpression: aString
^self parse: 'doIt ^[', aString, '] value'
!
recompile: aClass
aClass methodDictionary do: [:each |
console log: aClass name, ' >> ', each selector.
self install: each source forClass: aClass category: each category].
self setupClass: aClass.
aClass isMetaclass ifFalse: [self recompile: aClass class]
!
recompileAll
Smalltalk current classes do: [:each |
Transcript show: each; cr.
[self recompile: each] valueWithTimeout: 100]
!
setupClass: aClass
<smalltalk.init(aClass)>
! !
!Compiler class methodsFor: '*Compiler'!
recompile: aClass
self new recompile: aClass
!
recompileAll
Smalltalk current classes do: [:each |
self recompile: each]
! !
Object subclass: #DoIt
instanceVariableNames: ''
package:'Compiler'!
!DoIt commentStamp!
`DoIt` is the class used to compile and evaluate expressions. See `Compiler >> evaluateExpression:`.!
Object subclass: #NodeVisitor
instanceVariableNames: ''
package:'Compiler'!
!NodeVisitor commentStamp!
I am the abstract super class of all AST node visitors.!
!NodeVisitor methodsFor: '*Compiler'!
visit: aNode
^ aNode accept: self
!
visitAll: aCollection
^ aCollection do: [ :each | self visit: each ]
!
visitAssignmentNode: aNode
^ self visitNode: aNode
!
visitBlockNode: aNode
^ self visitNode: aNode
!
visitBlockSequenceNode: aNode
^ self visitSequenceNode: aNode
!
visitCascadeNode: aNode
^ self visitNode: aNode
!
visitClassReferenceNode: aNode
^ self visitVariableNode: aNode
!
visitDynamicArrayNode: aNode
^ self visitNode: aNode
!
visitDynamicDictionaryNode: aNode
^ self visitNode: aNode
!
visitJSStatementNode: aNode
^ self visitNode: aNode
!
visitMethodNode: aNode
^ self visitNode: aNode
!
visitNode: aNode
^ self visitAll: aNode nodes
!
visitReturnNode: aNode
^ self visitNode: aNode
!
visitSendNode: aNode
^ self visitNode: aNode
!
visitSequenceNode: aNode
^ self visitNode: aNode
!
visitValueNode: aNode
^ self visitNode: aNode
!
visitVariableNode: aNode
^ self visitNode: aNode
! !
NodeVisitor subclass: #AbstractCodeGenerator
instanceVariableNames: 'currentClass source'
package:'Compiler'!
!AbstractCodeGenerator commentStamp!
I am the abstract super class of all code generators and provide their common API.!
!AbstractCodeGenerator methodsFor: '*Compiler'!
classNameFor: aClass
^aClass isMetaclass
ifTrue: [aClass instanceClass name, '.klass']
ifFalse: [
aClass isNil
ifTrue: ['nil']
ifFalse: [aClass name]]
!
currentClass
^currentClass
!
currentClass: aClass
currentClass := aClass
!
pseudoVariables
^#('self' 'super' 'true' 'false' 'nil' 'thisContext')
!
safeVariableNameFor: aString
^(Smalltalk current reservedWords includes: aString)
ifTrue: [aString, '_']
ifFalse: [aString]
!
source
^source ifNil: ['']
!
source: aString
source := aString
! !
!AbstractCodeGenerator methodsFor: '*Compiler'!
compileNode: aNode
self subclassResponsibility
! !
AbstractCodeGenerator subclass: #CodeGenerator
instanceVariableNames: ''
package:'Compiler'!
!CodeGenerator commentStamp!
I am a basic code generator. I generate a valid JavaScript output, but no not perform any inlining.
See `InliningCodeGenerator` for an optimized JavaScript code generation.!
!CodeGenerator methodsFor: '*Compiler'!
compileNode: aNode
| ir stream |
self semanticAnalyzer visit: aNode.
ir := self translator visit: aNode.
^ self irTranslator
visit: ir;
contents
!
irTranslator
^ IRJSTranslator new
!
semanticAnalyzer
^ SemanticAnalyzer on: self currentClass
!
translator
^ IRASTTranslator new
source: self source;
theClass: self currentClass;
yourself
! !
Object subclass: #Node
instanceVariableNames: 'position nodes shouldBeInlined shouldBeAliased'
package:'Compiler'!
!Node commentStamp!
I am the abstract root class of the abstract syntax tree.
position: holds a point containing lline- and column number of the symbol location in the original source file!
!Node methodsFor: '*Compiler'!
addNode: aNode
self nodes add: aNode
!
nodes
^nodes ifNil: [nodes := Array new]
!
position
^position ifNil: [position := 0@0]
!
shouldBeAliased
^ shouldBeAliased ifNil: [ false ]
!
shouldBeAliased: aBoolean
shouldBeAliased := aBoolean
!
shouldBeInlined
^ shouldBeInlined ifNil: [ false ]
!
shouldBeInlined: aBoolean
shouldBeInlined := aBoolean
! !
!Node methodsFor: '*Compiler'!
nodes: aCollection
nodes := aCollection
!
position: aPosition
position := aPosition
! !
!Node methodsFor: '*Compiler'!
isAssignmentNode
^ false
!
isBlockNode
^false
!
isBlockSequenceNode
^false
!
isImmutable
^false
!
isReturnNode
^false
!
isSendNode
^false
!
isValueNode
^false
!
subtreeNeedsAliasing
^(self shouldBeAliased or: [ self shouldBeInlined ]) or: [
(self nodes detect: [ :each | each subtreeNeedsAliasing ] ifNone: [ false ]) ~= false ]
! !
!Node methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitNode: self
! !
Node subclass: #AssignmentNode
instanceVariableNames: 'left right'
package:'Compiler'!
!AssignmentNode methodsFor: '*Compiler'!
left
^left
!
left: aNode
left := aNode
!
nodes
^ Array with: self left with: self right
!
right
^right
!
right: aNode
right := aNode
! !
!AssignmentNode methodsFor: '*Compiler'!
isAssignmentNode
^ true
! !
!AssignmentNode methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitAssignmentNode: self
! !
Node subclass: #BlockNode
instanceVariableNames: 'parameters scope'
package:'Compiler'!
!BlockNode methodsFor: '*Compiler'!
parameters
^parameters ifNil: [parameters := Array new]
!
parameters: aCollection
parameters := aCollection
!
scope
^ scope
!
scope: aLexicalScope
scope := aLexicalScope
! !
!BlockNode methodsFor: '*Compiler'!
isBlockNode
^true
! !
!BlockNode methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitBlockNode: self
! !
Node subclass: #CascadeNode
instanceVariableNames: 'receiver'
package:'Compiler'!
!CascadeNode methodsFor: '*Compiler'!
receiver
^receiver
!
receiver: aNode
receiver := aNode
! !
!CascadeNode methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitCascadeNode: self
! !
Node subclass: #DynamicArrayNode
instanceVariableNames: ''
package:'Compiler'!
!DynamicArrayNode methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitDynamicArrayNode: self
! !
Node subclass: #DynamicDictionaryNode
instanceVariableNames: ''
package:'Compiler'!
!DynamicDictionaryNode methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitDynamicDictionaryNode: self
! !
Node subclass: #JSStatementNode
instanceVariableNames: 'source'
package:'Compiler'!
!JSStatementNode methodsFor: '*Compiler'!
source
^source ifNil: ['']
!
source: aString
source := aString
! !
!JSStatementNode methodsFor: '*Compiler'!
accept: aVisitor
^ aVisitor visitJSStatementNode: self
! !
Node subclass: #MethodNode
instanceVariableNames: 'selector arguments source scope classReferences messageSends superSends'
package:'Compiler'!
!MethodNode methodsFor: '*Compiler'!
arguments
^arguments ifNil: [#()]
!
arguments: aCollection
arguments := aCollection
!
classReferences