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-- @authors		Frédéric Jouault
-- @date		2007/07/26
-- @description	This ACG code generator generates .asm files that run on the ATL VM from ATL models.
acg ATL startsWith Unit {

-- @begin Type Encoding
	function OclType::encode() = '<DUMMY>';
	function IntegerType::encode() = 'I';
	function OclAnyType::encode() = 'J';
	function RealType::encode() = 'D';
	function BooleanType::encode() = 'B';
	function StringType::encode() = 'S';
	function Module::encode() = 'A';
	function OclModelElement::encode() = 'M' + self.model.name + '!' + self.name + ';';
	function SequenceType::encode() = 'Q' + self.elementType.encode();
	function BagType::encode() = 'G' + self.elementType.encode();
	function CollectionType::encode() = 'C' + self.elementType.encode();
	function SetType::encode() = 'E' + self.elementType.encode();
	function OrderedSetType::encode() = 'O' + self.elementType.encode();
	function TupleType::encode() = 'T' + self.attributes->collect(e | e.type.encode() + e.name + ';').prepend('').sum() + ';';
-- @end Type Encoding

	asm Module name self.name {
		field 'links' : 'NTransientLinkSet;'
		field 'col' : 'J'
		if(self.isRefining) {
			field 'enumLiteralType' : 'J'
		}

--		if(self.isRefining) {
--			report error 'refining mode not supported by ATL 2006 yet'
--		}

		operation
				context 'A'
				name 'main' {
			getasm
			push 'OclParametrizedType'
			push '#native'
			new
			dup
			push 'Collection'
			pcall 'J.setName(S):V'
			dup
			push 'OclSimpleType'
			push '#native'
			new
			dup
			push 'OclAny'
			pcall 'J.setName(S):V'
			pcall 'J.setElementType(J):V'
			set 'col'

			if(self.isRefining) {
				getasm
				push 'EnumLiteral'
				push '#native'
				new
				call 'J.oclType():J'
				set 'enumLiteralType'

				-- OclType.registerWeavingHelper(name : String, persistTo : String)
				push 'Element'
				push 'RefiningTrace'
				findme
				push 'sourceElement'
				push 'persistedSourceElement'
				pcall 'J.registerWeavingHelper(SS):V'
			}

			analyze self.elements->select(e | e isa Helper) mode register

			getasm
			push 'TransientLinkSet'
			push '#native'
			new
			set 'links'

			let ep = self.elements->select(e | e isa CalledRule)->select(e | e.isEntrypoint).first() {
				if(not ep.oclIsUndefined()) {
					getasm
					pcall 'A.' + ep.name + '():V'
				}
			}

			getasm
			pcall 'A.__matcher__():V'
			getasm
			pcall 'A.__exec__():V'

			if(self.isRefining) {
				getasm
				pcall 'A.__applyRefiningTrace__():V'
			}

			let ep = self.elements->select(e | e isa CalledRule)->select(e | e.isEndpoint).first() {
				if(not ep.oclIsUndefined()) {
					getasm
					pcall 'A.' + ep.name + '():V'
				}
			}
		}
		operation
				context 'A'
				name '__resolve__' {
			param 'value' : 'J'

			load 'value'
			getasm
			get 'col'
			call 'J.oclIsKindOf(J):B'
			if thn
					-- not a collection
				getasm
				get 'links'
				load 'value'
				call 'NTransientLinkSet;.getLinkBySourceElement(S):QNTransientLink;'
				dup
				call 'J.oclIsUndefined():B'
				if thn2
					load 'value'
					call 'NTransientLink;.getTargetFromSource(J):J'
					goto eoi2
			    thn2:
					pop
					load 'value'	-- TODO: refining_copy
			    eoi2:
				goto eoi
		    thn:
				push 'Sequence'
				push '#native'
				new
				load 'value'
				iterate
					variable self named 'e' {
						getasm
						load self
						call 'A.__resolve__(J):J'
						call 'QJ.including(J):QJ'
					}
				enditerate
				call 'QJ.flatten():QJ'
		    eoi:
		}
		operation
				context 'A'
				name 'resolveTemp' {
			param 'value' : 'J'
			param 'name' : 'S'

			getasm
			get 'links'
			load 'value'
			call 'NTransientLinkSet;.getLinkBySourceElement(S):QNTransientLink;'
			load 'value'
			load 'name'
			call 'NTransientLink;.getNamedTargetFromSource(JS):J'
		}
		operation
				context 'J'
				name '__applyReverseBinding' {
			param 'propertyName' : 'S'
			param 'target' : 'J'

			load 'target'
			getasm
			get 'col'
			call 'J.oclIsKindOf(J):B'
			if col
				-- not col
				if(self.isRefining) {
					load 'target'					-- tgtTraceElement
					call 'J.__asElement():J'	-- tgtTraceElement
					load 'propertyName'			-- tgtTraceElement, propertyName
					load 'self'					-- tgtTraceElement, propertyName, traceElement
						-- tgtTraceElement, propertyName, traceElement 
					call 'MRefiningTrace!Element;.setProperty(SJ):V'
				} else {
					getasm						-- thisModule
					load 'target'				-- thisModule, target
					call 'A.__resolve__(J):J'	-- resolvedTarget
					load 'propertyName'			-- resolvedTarget, propertyName
					load 'self'					-- resolvedTarget, propertyName, self
					pcall 'J.refSetValue(SJ):J'
				}
				goto end
		  col:
				load 'target'
				iterate
					load 'self'
					swap
					load 'propertyName'
					swap
					pcall 'J.__applyReverseBinding(SJ):V'
				enditerate
		  end:
		}
		operation
				context 'A'
				name '__matcher__' {
			foreach(r in self.elements->select(e | (e isa MatchedRule) and (not (e isa LazyMatchedRule)))->select(e | e.superRule.oclIsUndefined())) {
				getasm
				pcall 'A.__match' + r.name + '():V'
			}
		}
		operation
				context 'A'
				name '__exec__' {
			foreach(r in self.elements->select(e | e isa MatchedRule and not (e isa LazyMatchedRule))) {
				getasm
				get 'links'
				push r.name
				call 'NTransientLinkSet;.getLinksByRule(S):QNTransientLink;'
				iterate
					variable self named 'e' {
						getasm
						load self
						pcall 'A.__apply' + r.name + '(NTransientLink;):V'
					}
				enditerate
			}
		}
		if(self.isRefining) {
			operation
					context 'MRefiningTrace!Element;'
					name 'setProperty' {
				param 'propertyName' : 'S'
				param 'value' : 'J'
				param 'isAssignment' : 'B'
	
				load 'self'
				push 'Slot'
				push 'RefiningTrace'
				new
				dup
				load 'isAssignment'
				set 'isAssignment'
				dup
				load 'propertyName'
				set 'name'		-- traceElement, slot
				dup				-- traceElement, slot, slot
				load 'value'	-- traceElement, slot, slot, value
				dup
				getasm
				get 'col'
				call 'J.oclIsKindOf(J):B'
				if setPropertyThn
					-- not a collection
					call 'J.__toValue():J'
					goto setPropertyEoi
			  setPropertyThn:
			  		getasm
			  		swap
			  		call 'A.__collectionToValue(QJ):J'
			  setPropertyEoi:				-- element, slot, slot, value
				set 'value'
				set 'slots'
			}
			operation
					context 'A'
					name '__applyRefiningTrace__' {
				push 'Element'
				push 'RefiningTrace'
				findme
				push 'refiningTrace'
				call 'MMOF!Classifier;.allInstancesFrom(S):QJ'
				dup
				iterate
													-- traceElement
						dup							-- traceElement, traceElement
						get 'sourceElement'			-- traceElement, element|OclUndefined
						call 'J.oclIsUndefined():B'	-- traceElement, oclIsUndefined?
						call 'B.not():B'			-- traceElement, oclIsDefined?
						if sourceElement
							-- create the new element
													-- traceElement
							dup		 				-- traceElement, traceElement
							get 'type'				-- traceElement, typeName
							swap					-- typeName, traceElement
							dup_x1					-- traceElement, typeName, traceElement
							get 'metamodel'			-- traceElement, typeName, metamodelName
							new						-- traceElement, element
							set 'sourceElement'		-- nothing
							goto next
--TODO:use id?		
					  sourceElement:
					  								-- traceElement
							pop
					  next:
				enditerate
				dup							-- We dup refining trace to loop again and execute deletion
				iterate
											-- traceElement
						dup					-- traceElement, traceElement
						get 'sourceElement'	-- traceElement, element
						swap				-- element, traceElement
						get 'slots'
						iterate
											-- element, slot
							dup
							get 'isAssignment'	-- sourceElement, slot, isAssignment
							call 'B.not():B'
							if noAssign
												-- sourceElement, slot
								dup_x1			-- slot, sourceElement, slot
								get 'name'		-- slot, sourceElement, name
								call 'J.refUnsetValue(S):J'	-- slot, sourceElement
								swap			-- sourceElement, slot
						  noAssign:
											-- sourceElement, slot
							dup
							get 'name'		-- sourceElement, slot, name
							swap			-- sourceElement, name, slot
							get 'value'		-- sourceElement, name, value
							call 'J.__fromValue():J'	-- sourceElement, name, actualValue
							call 'J.refSetValue(SJ):J'
						enditerate
						pop
				enditerate
				iterate						-- Iteration to delete everything. We do another loop to be sure to do the deletion
											-- after all the other modifications to prevent errors
											-- traceElement
					dup						-- traceElement, traceElement
					get 'toDelete'			-- traceElement, boolean
					call 'B.not():B'		-- traceElement, boolean
					if noDelete
						dup					-- traceElement, traceElement
						get 'sourceElement'	-- traceElement, element
						delete				-- traceElement
						push 'Sequence'		
						push '#native'
						new
						call 'QJ.first():J' -- traceElement, OclUndefined
						set 'sourceElement' -- Unset sourceElement reference to avoid problems when serializing the refining trace
						goto endDeleteLoop
					noDelete:
											-- traceElement
						pop
					endDeleteLoop:
				enditerate
			}
			operation
					context 'A'
					name '__collectionToValue' {
				param 'c' : 'CJ'

				push 'CollectionVal'
				push 'RefiningTrace'
				new
				load 'c'
				iterate
											-- collectionVal, element
					call 'J.__toValue():J'	-- collectionVal, value
					swap					-- value, collectionVal
					dup_x1					-- collectionVal, value, collectionVal
					swap					-- collectionVal, collectionVal, value
					set 'elements'			-- collectionVal
				enditerate
			}
			operation
					context 'B'
					name '__toValue' {
				push 'BooleanVal'
				push 'RefiningTrace'
				new
				dup
				load 'self'
				set 'value'
			}
			operation
					context 'I'
					name '__toValue' {
				push 'IntegerVal'
				push 'RefiningTrace'
				new
				dup
				load 'self'
				set 'value'
			}
			operation
					context 'D'
					name '__toValue' {
				push 'RealVal'
				push 'RefiningTrace'
				new
				dup
				load 'self'
				set 'value'
			}
			operation
					context 'S'
					name '__toValue' {
				push 'StringVal'
				push 'RefiningTrace'
				new
				dup
				load 'self'
				set 'value'
			}
			operation
					context 'MRefiningTrace!Element;'
					name '__toValue' {
				push 'ElementVal'
				push 'RefiningTrace'
				new
				dup
				load 'self'
				set 'value'
			}
			operation
					context 'J'
					name '__toValue' {
				load 'self'
				call 'J.oclType():J'
				getasm
				get 'enumLiteralType'
				call 'J.=(J):B'
				if thn3
					-- not enum literal
					load 'self'
					call 'J.oclIsUndefined():B'
				if oclUndefined
					-- This point should only be reached for model elements
					
					push 'ElementVal'
					push 'RefiningTrace'
					new
					dup
					load 'self'
					call 'J.__asElement():J'
					set 'value'
					goto eoi3
			  oclUndefined:
					push 'NullVal'
					push 'RefiningTrace'
					new
					goto eoi3
			  thn3:
					push 'EnumLiteralVal'
					push 'RefiningTrace'
					new
					dup
					load 'self'
					call 'J.toString():S'
					set 'value'
			  eoi3:
			}
			-- should only be called on model elements
			operation
					context 'J'
					name '__asElement' {
				-- TODO: use a Map as cache
				push 'Element'
				push 'RefiningTrace'
				new
				dup
				load 'self'
				set 'sourceElement'
			}
			-- may notably be called from __applyReverseBinding if target has already been resolved (e.g., using resolveTemp)
			operation
					context 'MRefiningTrace!Element;'
					name '__asElement' {
				load 'self'
			}
			operation
					context 'MRefiningTrace!CollectionVal;'
					name '__fromValue' {
				push 'Sequence'
				push '#native'
				new
				load 'self'
				get 'elements'
				iterate
					call 'J.__fromValue():J'
					call 'QJ.append(J):QJ'
				enditerate
			}
			operation
					context 'MRefiningTrace!BooleanVal;'
					name '__fromValue' {
				load 'self'
				get 'value'
			}
			operation
					context 'MRefiningTrace!IntegerVal;'
					name '__fromValue' {
				load 'self'
				get 'value'
			}
			operation
					context 'MRefiningTrace!RealVal;'
					name '__fromValue' {
				load 'self'
				get 'value'
			}
			operation
					context 'MRefiningTrace!StringVal;'
					name '__fromValue' {
				load 'self'
				get 'value'
			}
			operation
					context 'MRefiningTrace!NullVal;'
					name '__fromValue' {
				push 'Sequence'
				push '#native'
				new
				call 'QJ.first():J'
			}
			operation
					context 'MRefiningTrace!ElementVal;'
					name '__fromValue' {
				load 'self'
				get 'value'
				get 'sourceElement'
			}
			operation
					context 'MRefiningTrace!EnumLiteralVal;'
					name '__fromValue' {
				push 'EnumLiteral'
				push '#native'
				new
				dup
				load 'self'
				get 'value'
				set 'name'
			}
		}
		analyze self.elements
	}

	asm Query name self.name {
		operation
				context 'A'
				name 'main' {
			analyze self.helpers mode register
			analyze self.body
		}
		analyze self.helpers
	}

	asm Library name self.name {
		-- we have a main operation to register the attribute helpers
		operation
				context 'A'
				name 'main' {
			analyze self.helpers mode register
		}
		analyze self.helpers
	}

-- @begin Helpers
	Helper {
		analyze self.definition.feature	
	}

	Helper mode register {
		analyze self.definition.feature	mode register
	}

	Operation mode register {
		-- nothing to do: only attributes need registration
	}

	Operation {
		operation
				context
					if self.definition.context_.oclIsUndefined() then
						'A'
					else
						self.definition.context_.context_.encode()
					endif
				name self.name {
			foreach(p in self.parameters) {
				param p.varName : 'J'
			}
			analyze self.body
		}
	}

	-- module attribute
	Attribute mode register | self.definition.context_.oclIsUndefined() {
		getasm
		analyze self.initExpression
		set self.name
	}

	Attribute | self.definition.context_.oclIsUndefined() {
		field self.name : 'J'
	}

	Attribute mode register {
		analyze self.definition.context_.context_
		push self.name
		push '__init' + self.name
		pcall 'J.registerHelperAttribute(SS):V'
	}

	Attribute {
		operation
				context self.definition.context_.context_.encode()
				name '__init' + self.name {
			analyze self.initExpression
		}
	}
-- @end Helpers

-- @begin Declarative Part
-- @begin Standard Rules
	function Rule::ruleOutPatternElements() =
		if self.outPattern.oclIsUndefined() then
			Sequence {}
		else
			self.outPattern.elements
		endif;

	MatchedRule {
		analyze self mode matcher
		analyze self mode apply
	}

	MatchedRule mode matcher | not self.superRule.oclIsUndefined() {
		-- do nothing because subRules are matched by their superRules
	}

	MatchedRule mode matcher | self.superRule.oclIsUndefined() {
		operation
				context 'A'
				name '__match' + self.name {
			foreach(ipe in self.inPattern.elements) {	-- equivalent to self.inPatternElements because self.isRoot()
				let sourceModels =
						if ipe.models.isEmpty() then
							self.module.inModels->select(e |
								-- TODO: compare models instead of names?
								e.metamodel.name = ipe.type.model.name
							)
						else
							ipe.models
						endif {
					if(sourceModels.isEmpty()) {
						report error ipe.type.model.name + ' is not a source model'
					}
					foreach(m in sourceModels) {
						push ipe.type.name	-- TODO: optimize this out of loop?
						push ipe.type.model.name
						findme
						push m.name
						call 'MMOF!Classifier;.allInstancesFrom(S):QJ'
						if(m <> sourceModels.first()) {
							call 'CJ.union(CJ):CJ'
						}
					}
				}
				iterate
					variable ipe named ipe.varName {
					[
						if(not self.inPattern.filter.oclIsUndefined()) {
							analyze self.inPattern.filter
							call 'B.not():B'
							if end
						}

						analyze self mode checkSubRules
					    end:
					]
					}
				enditerate
			}
		}
	}

	function MatchedRule::allSubRules() =
		if self.isAbstract then
			self.children
		else
			self.children.append(self)
		endif;

	-- makes sure the default rule is last
	function MatchedRule::subRules() =
		self.allSubRules()->select(e | not e.inPattern.filter.oclIsUndefined()).union(
			self.allSubRules()->select(e | e.inPattern.filter.oclIsUndefined())
		);

	function MatchedRule::rootRule() =
		if self.superRule.oclIsUndefined() then
			self
		else
			self.superRule.rootRule()
		endif;

	function MatchedRule::mostAbstractOutPatternElements() =
		if self.superRule.oclIsUndefined() then
			self.ruleOutPatternElements()
		else
			let super = self.superRule.mostAbstractOutPatternElements() in
			let superNames = super->collect(e | e.varName) in
			super.union(
				self.ruleOutPatternElements()->select(e |
					not superNames.includes(e.varName)
				)
			)
		endif;

	function MatchedRule::mostConcreteOutPatternElements() =
		if self.superRule.oclIsUndefined() then
			self.ruleOutPatternElements()
		else
			let this = self.ruleOutPatternElements() in
			let thisNames = this->collect(e | e.varName) in
			this.union(
				self.superRule.mostConcreteOutPatternElements()->select(e |
					not thisNames.includes(e.varName)
				)
			)
		endif;

	function MatchedRule::mostConcreteVariables() =
		if self.superRule.oclIsUndefined() then
			self.variables
		else
			let this = self.variables in
			let thisNames = this->collect(e | e.varName) in
			this.union(
				self.superRule.mostConcreteVariables()->select(e |
					not thisNames.includes(e.varName)
				)
			)
		endif;

	function MatchedRule::inPatternElements() =
		self.rootRule().inPattern.elements;

	function SimpleInPatternElement::actualDeclaration() =
		self.inPattern.rule.inPatternElements()->select(e | e.varName = self.varName).first();

	function OutPatternElement::actualDeclaration() =
		if self.outPattern.rule isa MatchedRule then
			self.outPattern.rule.mostAbstractOutPatternElements()->select(e | e.varName = self.varName).first()
		else
			self
		endif;

	-- subRules should be ordered with the only one without guard last (including self if not abstract)
	-- their should be only one with no guard (including self)
	-- only one should match (except the one without guard, which is "default")
	-- a subrule inpattern must have the same number of elements with the same names
	MatchedRule mode checkSubRules | self.children.size() > 0 {
		foreach(subRule in self.subRules()) {
			foreach(ipe in subRule.inPattern.elements) {
				load ipe.actualDeclaration()
				push ipe.type.name
				push ipe.type.model.name
				findme
				call 'J.oclIsKindOf(J):B'
				call 'B.not():B'
				if unmatched
			}
			if(not subRule.inPattern.filter.oclIsUndefined()) {
				analyze subRule.inPattern.filter
				call 'B.not():B'
				if unmatched
			}

			-- we only select the first subRule that matches (there should be only one anyway)
			if(subRule = self) {
				analyze self mode create
			} else {
				analyze subRule mode checkSubRules
			}
			goto end
		    unmatched(subRule):
		}
	    end:
	}

	MatchedRule mode checkSubRules {
		analyze self mode create
	}

	MatchedRule mode create {
		getasm
		get 'links'

		push 'TransientLink'
		push '#native'
		new

		dup
		push self.name
		pcall 'NTransientLink;.setRule(MATL!Rule;):V'

		foreach(ipe in self.inPattern.elements) {
			dup
			push ipe.varName
			load ipe.actualDeclaration()
			pcall 'NTransientLink;.addSourceElement(SJ):V'
		}

		foreach(v in self.mostConcreteVariables()) {
			dup
			push v.varName
			analyze v.initExpression
			dup
			variable v named v.varName {
				pcall 'NTransientLink;.addVariable(SJ):V'
			[
				let opes = self.mostConcreteOutPatternElements() {
					if(self.module.isRefining) {
						if (not opes.first().oclIsUndefined()){
							-- there is no first element because the first element is going to be dropped
							-- so no different treatment for the first element 
							if (not self.outPattern.dropPattern.oclIsUndefined()){
								analyze opes mode match
							} else {
								analyze opes.first() mode matchFirstRefining
								analyze opes.subSequence(2, opes.size()) mode match
							}
							
						}
					} else {
						analyze opes mode match
					}
				}
			]
			}
		}

		if (not self.outPattern.dropPattern.oclIsUndefined()){
			analyze self.outPattern.dropPattern
		}

		if(self.isNoDefault) {
			pushf
		} else {
			pusht
		}
		pcall 'NTransientLinkSet;.addLink2(NTransientLink;B):V'
	}

	MatchedRule mode apply | self.isAbstract {
		-- do nothing
	}

	MatchedRule mode apply | not self.isAbstract {
		operation
				context 'A'
				name '__apply' + self.name {
			param 'link' : 'NTransientLink;'
			-- TODO: only one source element for refining mode
			foreach(ipe in self.inPatternElements()) {
				load 'link'
				push ipe.varName
				call 'NTransientLink;.getSourceElement(S):J'
				variable ipe named ipe.varName {
				[
					foreach(ope in self.mostAbstractOutPatternElements()) {
						load 'link'
						push ope.varName
						call 'NTransientLink;.getTargetElement(S):J'
						variable ope named ope.varName {
						[
							foreach(v in self.mostConcreteVariables()) {
								load 'link'
								push v.varName
								call 'NTransientLink;.getVariable(S):J'
								variable v named v.varName {
								[
									analyze self.mostConcreteOutPatternElements() mode apply
									if(not self.actionBlock.oclIsUndefined()) {
										if(self.module.isRefining) {
											report error 'do block not supported in refining mode'
										} else {
											analyze self.actionBlock
										}
									}
								]
								}
							}
						]
						}
					}
				]
				}
			}
		}
	}

	attribute OutPatternElement::isRefiningMode =
		self.outPattern.rule.module.isRefining;
 
-- @begin SimpleOutPatternElement
	code SimpleOutPatternElement mode match {
		dup
		push self.varName
		if(self.isRefiningMode) {
			push 'Element'
			push 'RefiningTrace'
			new
			dup
			push self.type.name
			set 'type'
			dup
			push self.type.model.name
			set 'metamodel'
		} else {
			push self.type.name
			push self.type.model.name
			if (not self.model.oclIsUndefined()) {
				push self.model.name
				newin
			} else {
				new
			}
		}

		pcall 'NTransientLink;.addTargetElement(SJ):V'
	}

	-- TODO: removal, change...
	code SimpleOutPatternElement mode matchFirstRefining {
		dup
		push self.varName

		push 'Element'
		push 'RefiningTrace'
		new
		dup
		push self.type.name
		set 'type'
		dup
		push self.type.model.name
		set 'metamodel'
		dup
		load self.outPattern.rule.inPatternElements().first()
		set 'sourceElement'

		pcall 'NTransientLink;.addTargetElement(SJ):V'
	}

	function SimpleOutPatternElement::superElement() =
		if self.outPattern.rule isa MatchedRule then
			let superRule = self.outPattern.rule.superRule in
			if superRule.oclIsUndefined() then
				OclUndefined
			else
				superRule.mostConcreteOutPatternElements()->select(e | e.varName = self.varName).first()
			endif
		else
			OclUndefined
		endif;

	function SimpleOutPatternElement::allReverseBindings() =
		let superElement = self.superElement() in
		if superElement.oclIsUndefined() then
			Sequence {}
		else
			superElement.allReverseBindings()
		endif.union(self.reverseBindings);

	-- We create a normal template instead of a code template because this template will be
	-- called from another code template matching the same model element. If this were
	-- a code template an error will be raised when the vm tries to remove the entrance
	-- for this code template (it is registered twice, but as it is a map is has no effect
	-- so we can not remove twice)
	SimpleOutPatternElement mode applyReverseBindings {	-- element -> element
		foreach(rb in self.allReverseBindings()) {
			if(rb isa NavigationOrAttributeCallExp) {
				dup					-- element, element
				push rb.name
				analyze rb.source	-- element, element, propertyName, value
				pcall 'J.__applyReverseBinding(SJ):V'
									-- element
			} else {
				report error 'only navigations are allowed in reversebindings' 
			}
		}
	}

	function MatchedRule::getBindings(varName, ret) =
		if self.outPattern.oclIsUndefined() then
			Sequence {}
		else
			let ope =
				self.outPattern.elements->select(e |
					e.varName = varName
				).first() in
			let retNames = ret->collect(e | e.propertyName) in
			let newRet =
				if ope.oclIsUndefined() then
					ret
				else
					ret.union(
						ope.bindings->select(e |
							not retNames.includes(e.propertyName)
						)
					)
				endif in
			if self.superRule.oclIsUndefined() then
				newRet
			else
				self.superRule.getBindings(varName, newRet)
			endif
		endif;

	function OutPatternElement::allBindings() =
		let superRule = self.outPattern.rule.superRule in
		if superRule.oclIsUndefined() then
			self.bindings
		else
			self.outPattern.rule.getBindings(self.varName, Sequence {})
		endif;

	code SimpleOutPatternElement mode apply {
		load self.actualDeclaration()	-- element
		analyze self mode applyReverseBindings
		if(self.isRefiningMode) {
			analyze self.allBindings() mode refining
		} else {
			analyze self.allBindings()
		}
		pop
	}

	code Binding {
		dup
		if(self.isAssignment) {
			push self.propertyName
			call 'J.refUnsetValue(S):J'
		}
		getasm
		analyze self.value
		call 'A.__resolve__(J):J'
		set self.propertyName
	}

	code Binding mode refining {
		dup
		push self.propertyName
		getasm
		analyze self.value
		call 'A.__resolve__(J):J'

				-- traceElement, propertyName, value
		if(self.isAssignment) {
			pusht
		} else {
			pushf
		}
		pcall 'MRefiningTrace!Element;.setProperty(SJB):V'
	}
-- @end SimpleOutPatternElement

-- ForEachOutPatternElement does not support rule inheritance.
-- It is now deprecated anyway.
-- @begin ForEachOutPatternElement
	code ForEachOutPatternElement mode match {
		if(self.isRefiningMode) {
			report error 'distinct-foreach target pattern elements are not supported in refining mode, use lazy rules instead'
		} else {
			report warning 'distinct-foreach target pattern elements are deprecated, use lazy rules instead'
			dup
			push self.varName
	
			push 'Sequence'
			push '#native'
			new
			analyze self.collection
			iterate
				pop
				push self.type.name
				push self.type.model.name
				-- NOTE: foreach patterns syntax can't handle output model specification, so "newin" instructions are not generated here
				new
				call 'CJ.including(J):CJ'
			enditerate
			pcall 'NTransientLink;.addTargetElement(SJ):V'
		}
	}

	code ForEachOutPatternElement mode apply {
		pushi 1
		variable self.type named 'counter' {			-- self.type is not a VariableDeclaration but this shouldn't matter
			analyze self.collection
			call 'CJ.asSequence():QJ'
			variable self.collection named 'collection' {	-- self.collection is not a VariableDeclaration but this shouldn't matter
				load self
				iterate
					load self.collection	-- 'collection'
					load self.type		-- 'counter'
					call 'QJ.at(I):J'
					variable self.iterator named self.iterator.varName {
						analyze self.bindings mode forEach
					}
					pop
					load self.type		-- 'counter'
					pushi 1
					call 'I.+(I):I'
					store self.type		-- 'counter'
				enditerate
			}
		}
	}

	code Binding mode forEach {
		dup
		getasm
		analyze self.value
		dup
		getasm
		get 'col'
		call 'J.oclIsKindOf(J):B'
		call 'B.not():B'
		if thn
			load self.outPatternElement.type	-- 'counter'
			call 'QJ.at(I):J'
	    thn:
		call 'A.__resolve__(J):J'
		set self.propertyName
	}
-- @end ForEachOutPatternElement

-- @begin DropPattern
    --
    -- We have to set toDelete flag to true
    --
	code DropPattern {	
		push 'Element'
		push 'RefiningTrace'
		new
		dup
		push self.outPattern.rule.inPatternElements().first().type.name
		set 'type'
		dup
		push self.outPattern.rule.inPatternElements().first().type.model.name
		set 'metamodel'
		dup
		pusht    
		set 'toDelete'
		load self.outPattern.rule.inPatternElements().first()
		set 'sourceElement'
	}

-- @end DropPattern

-- @end Standard Rules

-- @begin Lazy Rules
	LazyMatchedRule | self.isRefining {
		report error 'refining lazy matched rules not supported in ATL 2006 yet'
	}

	LazyMatchedRule | not self.superRule.oclIsUndefined() {
		-- do nothing because subRules are matched by their superRules
	}

	LazyMatchedRule | self.superRule.oclIsUndefined() {
		if(self.module.isRefining) {
			report error 'lazy rules not supported in refining mode yet'
		} else {
			operation
					context 'A'
					name self.name {
				foreach(ipe in self.inPattern.elements) {
					param ipe.varName : ipe.type.encode()
				}
	
				if(self.isUnique) {
					getasm
					get 'links'
					push self.name
					--TODO: finish this (also in VM code)
--					if(self.inPattern.elements.size() = 1) {
						load self.inPattern.elements.first().varName
--					} else {
--						push 'Tuple'
--						push '#native'
--						new				-- links, name, Tuple
--						foreach(e in self.inPattern.elements) {		-- TODO: change TransientLinkSet implementation accordingly
--							dup
--							load e.varName
--							set e.varName
--						}
--					}
					call 'NTransientLinkSet;.getLinkByRuleAndSourceElement(SJ):QNTransientLink;'
					dup
					call 'J.oclIsUndefined():B'
					if thn
						load self.inPattern.elements.first().varName
						call 'NTransientLink;.getTargetFromSource(J):J'
						goto eoo
				    thn:
				}
	
				getasm
				get 'links'
	
				push 'TransientLink'
				push '#native'
				new
	
				dup
				push self.name
				pcall 'NTransientLink;.setRule(MATL!Rule;):V'
	
				foreach(ipe in self.inPattern.elements) {
					dup
					push ipe.varName
					load ipe.varName
					pcall 'NTransientLink;.addSourceElement(SJ):V'
				}
	
				analyze self mode checkSubRules
			    eoo:
			}
		}
	}

	LazyMatchedRule mode checkSubRules | self.children.size() > 0 {
		foreach(subRule in self.subRules()) {
			foreach(ipe in subRule.inPattern.elements) {
				load ipe.varName
				push ipe.type.name
				push ipe.type.model.name
				findme
				call 'J.oclIsKindOf(J):B'
				call 'B.not():B'
				if unmatched
			}
			if(not subRule.inPattern.filter.oclIsUndefined()) {
				analyze subRule.inPattern.filter
				call 'B.not():B'
				if unmatched
			}

			-- we only select the first subRule that matches (there should be only one anyway)
			if(subRule = self) {
				foreach(v in self.mostConcreteVariables()) {
					analyze v.initExpression
					variable v named v.varName {
					[
						analyze self mode create
					]
					}
				}
			} else {
				analyze subRule mode checkSubRules
			}
			goto end
		    unmatched(subRule):
		}
	    end:
	}

	LazyMatchedRule mode checkSubRules {
		foreach(v in self.mostConcreteVariables()) {
			analyze v.initExpression
			variable v named v.varName {
			[
				analyze self mode create
			]
			}
		}
	}

	LazyMatchedRule mode create {	-- TODO: REFINING
		foreach(ope in self.mostConcreteOutPatternElements()) {
			if(ope isa ForEachOutPatternElement) {
				-- TODO: compiler crashes
				report error 'distinct-foreach target pattern elements are deprecated and not compatible with lazy rules'
			} else {
			
				dup
				push ope.varName
	
				push ope.type.name
				push ope.type.model.name
				if (not ope.model.oclIsUndefined()) {
					push ope.model.name
					newin
				} else {
					new
				}
				dup
				variable ope.actualDeclaration() named ope.varName {
					pcall 'NTransientLink;.addTargetElement(SJ):V'
				[
					pushf
					pcall 'NTransientLinkSet;.addLink2(NTransientLink;B):V'
	
					analyze self.mostConcreteOutPatternElements() mode apply
	
					if(not self.actionBlock.oclIsUndefined()) {
						analyze self.actionBlock
					}
	
					load self.mostConcreteOutPatternElements().first().actualDeclaration()
				]
				}
			}
		}
	}
-- @end Lazy Rules
-- @end Declarative Part

-- @begin OCL
-- @begin LiteralExps
-- @begin PrimitiveExps
	code BooleanExp | self.booleanSymbol {
		pusht
	}

	code BooleanExp {
		pushf
	}

	code IntegerExp {
		pushi self.integerSymbol
	}

	code RealExp {
		pushd self.realSymbol
	}

	code StringExp {
		push self.stringSymbol
	}
-- @end PrimitiveExps

	code EnumLiteralExp {
		push 'EnumLiteral'
		push '#native'
		new
		dup
		push self.name
		set 'name'
	}

	code OclUndefinedExp {
		push 'Sequence'
		push '#native'
		new
		call 'QJ.first():J'
	}

-- @begin CollectionExps
	code BagExp {
		push 'Bag'
		push '#native'
		new
		analyze self.elements {
			call 'CJ.including(J):CJ'
		}
	}

	code SequenceExp {
		push 'Sequence'
		push '#native'
		new
		analyze self.elements {
			call 'CJ.including(J):CJ'
		}
	}

	code SetExp {
		push 'Set'
		push '#native'
		new
		analyze self.elements {
			call 'CJ.including(J):CJ'
		}
	}

	code OrderedSetExp {
		push 'OrderedSet'
		push '#native'
		new
		analyze self.elements {
			call 'CJ.including(J):CJ'
		}
	}
-- @end CollectionExps

	code TupleExp {
		push 'Tuple'
		push '#native'
		new
		analyze self.tuplePart
	}

	code TuplePart {
		dup
		analyze self.initExpression
		set self.varName
	}

	code MapExp {
		push 'Map'
		push '#native'
		new
		analyze self.elements
	}

	code MapElement {
		analyze self.key
		analyze self.value
		call 'J.including(JJ):J'
	}
-- @end LiteralExps

-- @begin Types
-- @begin SimpleTypes
	code OclAnyType {
		push 'OclAny'
		push '#native'
		findme
	}

	code IntegerType {
		push 'Integer'
		push '#native'
		findme
	}

	code BooleanType {
		push 'Boolean'
		push '#native'
		findme
	}

	code RealType {
		push 'Real'
		push '#native'
		findme
	}

	code StringType {
		push 'String'
		push '#native'
		findme
	}
-- @end Simple Types

	code OclModelElement {
		push self.name
		push self.model.name
		findme
	}

	code TupleType {
		push 'TupleType'
		push '#native'
		new
		analyze self.attributes
	}

	code TupleTypeAttribute {
		dup
		push self.name
		push 'OclAny'
		push '#native'
		findme
		pcall 'J.addAttribute(SJ):V'
	}

-- @begin Parameterized Types
	code CollectionType {
		push 'OclParametrizedType'
		push '#native'
		new
		dup
		push 'Collection'
		pcall 'J.setName(S):V'
		dup
		analyze self.elementType
		pcall 'J.setElementType(J):V'
	}

	code SequenceType {
		push 'OclParametrizedType'
		push '#native'
		new
		dup
		push 'Sequence'
		pcall 'J.setName(S):V'
		dup
		analyze self.elementType
		pcall 'J.setElementType(J):V'
	}

	code SetType {
		push 'OclParametrizedType'
		push '#native'
		new
		dup
		push 'Set'
		pcall 'J.setName(S):V'
		dup
		analyze self.elementType
		pcall 'J.setElementType(J):V'
	}

	code OrderedSetType {
		push 'OclParametrizedType'
		push '#native'
		new
		dup
		push 'OrderedSet'
		pcall 'J.setName(S):V'
		dup
		analyze self.elementType
		pcall 'J.setElementType(J):V'
	}

	code BagType {
		push 'OclParametrizedType'
		push '#native'
		new
		dup
		push 'Bag'
		pcall 'J.setName(S):V'
		dup
		analyze self.elementType
		pcall 'J.setElementType(J):V'
	}
-- @end Parameterized Types
-- @end Types

	code LetExp {
		analyze self.variable.initExpression
		variable self.variable named self.variable.varName {
			analyze self.in_
		}
	}

	code IfExp {
		analyze self.condition
		if thn
			analyze self.elseExpression
			goto eoi
	    thn:
			analyze self.thenExpression
	    eoi:
	}

-- @begin VariableExp
	code VariableExp | self.referredVariable.varName = 'thisModule' {
		getasm
	}

	code VariableExp | self.referredVariable.varName = 'self' {
		load 'self'
	}

	-- is redefined for rule inheritance
	function VariableDeclaration::actualDeclaration() = self;

	code VariableExp |
			(self.referredVariable isa Parameter) or (
				if self.referredVariable isa InPatternElement then
					self.referredVariable.inPattern.rule isa LazyMatchedRule
				else
					false
				endif
			) {
		load self.referredVariable.varName
	}

	code VariableExp {
		load self.referredVariable.actualDeclaration()
	}
-- @end VariableExp

-- @begin PropertyCallExps
	code OperationCallExp |
			if self.operationName = '-' then	-- use a if to optimize
				self.arguments.size() = 0 and self.source isa NumericExp
			else
				false
			endif {
		pushi 0
		analyze self.source
		call 'J.-(J):J'
	}

	code OperationCallExp | self.source isa SuperExp {
		load 'self'
		analyze self.arguments
		supercall self.operationSignature
	}

	attribute OperationCallExp::operationSignature =
		'J.' + self.operationName + '(' + self.arguments->collect(e | 'J').prepend('').sum() + '):J';

	code OperationCallExp {
		analyze self.source
		analyze self.arguments
		call self.operationSignature
	}

	code NavigationOrAttributeCallExp {
		analyze self.source
		get self.name
	}

	code IterateExp | self.iterators.size() = 1 {
		analyze self.result.initExpression
		variable self.result named self.result.varName {
			analyze self.source
			iterate
				variable self.iterators.first() named self.iterators.first().varName {
					analyze self.body
					store self.result
				}
			enditerate
			load self.result
		}
	}

	-- WITH SEVERAL ITERATORS
	code IterateExp {
		analyze self.result.initExpression
		variable self.result named self.result.varName {
			analyze self.source
			dup
			foreach(i in self.iterators) { 
				if(i <> self.iterators.first()) {
					dup_x1
				}
				iterate
					variable i named i.varName {
					[
						analyze self.body
						store self.result
					]
					}
				enditerate
				if(i = self.iterators.last()) {
					pop
				} else {
					swap
				}
			}
			load self.result
		}
	}

-- @begin IteratorExps
	code IteratorExp | self.name = 'exists' and self.iterators.size() = 1 {
		pushf
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'B.or(B):B'
			}
		enditerate
	}

	-- WITH TWO ITERATORS
--	code IteratorExp | self.name = 'exists' and self.iterators.size() = 2 {
--		pushf							-- ret
--		analyze self.source					-- ret, Seq
--		dup							-- ret, Seq, Seq
--		iterate
--			variable self.iterators.first() named self.iterators.first().varName {
--									-- ret, Seq
--				dup_x1					-- Seq, ret, Seq
--				iterate
--					variable self.iterators.last() named self.iterators.last().varName {
--									-- Seq, ret
--						analyze self.body	-- Seq, ret, body
--						call 'B.or(B):B'	-- Seq, ret
--					}
--				enditerate
--				swap
--			}
--		enditerate
--		pop
--	}

	-- WITH SEVERAL ITERATORS
	code IteratorExp | self.name = 'exists' {
		pushf
		analyze self.source
		dup
		foreach(i in self.iterators) { 
			if(i <> self.iterators.first()) {
				dup_x1
			}
			iterate
				variable i named i.varName {
				[
					analyze self.body
					call 'B.or(B):B'
				]
				}
			enditerate
			if(i = self.iterators.last()) {
				pop
			} else {
				swap
			}
		}
	-- ACTUAL SEMANTICS (recursive):
--		pushf
--		analyze self.source
--		f(iterators, statements) { 
--			if(iterators.size() > 1) {
--				dup
--			}
--			iterate
--				variable iterators.first() named iterators.first().varName {
--					if(iterators.size() > 1) {
--						f(iterators.subSequence(2, iterators.size() - 1), statements)
--					} else {
--						statements
--					}
--				}
--			enditerate
--		} (self.iterators, {
--					analyze self.body
--					call 'B.or(B):B'
--				}
--		)
	}

	code IteratorExp | self.name = 'forAll' and self.iterators.size() = 1 {
		pusht
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'B.and(B):B'
			}
		enditerate
	}
	
	-- WITH SEVERAL ITERATORS
	code IteratorExp | self.name = 'forAll' {
		pusht
		analyze self.source
		dup
		foreach(i in self.iterators) { 
			if(i <> self.iterators.first()) {
				dup_x1
			}
			iterate
				variable i named i.varName {
				[
					analyze self.body
					call 'B.and(B):B'
				]
				}
			enditerate
			if(i = self.iterators.last()) {
				pop
			} else {
				swap
			}
		}
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'isUnique' and self.iterators.size() = 1 {
		analyze self.source
		dup
		call 'CJ.size():I'
		swap

		push 'Set'
		push '#native'
		new
		swap
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'CJ.including(J):CJ'
			}
		enditerate

		call 'CJ.size():I'
		call 'I.=(I):I'
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'any' and self.iterators.size() = 1 {
		push 'Sequence'
		push '#native'
		new
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'B.not():B'
				if thn
					load self.iterators.first()
					call 'CJ.including(J):CJ'
			    thn:
			}
		enditerate
		call 'CJ.asSequence():QJ'
		call 'QJ.first():J'
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'one' and self.iterators.size() = 1 {
		push 'Sequence'
		push '#native'
		new
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'B.not():B'
				if thn
					load self.iterators.first()
					call 'CJ.including(J):CJ'
			    thn:
			}
		enditerate
		call 'CJ.size():I'
		pushi 1
		call 'I.=(I):I'
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'select' and self.iterators.size() = 1 {
		push 'Sequence'
		push '#native'
		new
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'B.not():B'
				if thn
					load self.iterators.first()
					call 'CJ.including(J):CJ'
			    thn:
			}
		enditerate
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'reject' and self.iterators.size() = 1 {
		push 'Sequence'
		push '#native'
		new
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				if thn
					load self.iterators.first()
					call 'CJ.including(J):CJ'
			    thn:
			}
		enditerate
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'collect' and self.iterators.size() = 1 {
		push 'Sequence'
		push '#native'
		new
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {
				analyze self.body
				call 'CJ.including(J):CJ'
			}
		enditerate
	}

	-- One iterator max (from OCL spec)
	code IteratorExp | self.name = 'sortedBy' and self.iterators.size() = 1 {
		push 'Sequence'
		push '#native'
		new
		analyze self.source
		iterate
			variable self.iterators.first() named self.iterators.first().varName {

				dup
				call 'CJ.isEmpty():B'
				if thn
					dup
					pushi 1
					swap
					iterate
						load self.iterators.first()
						swap
						store self.iterators.first()
						analyze self.body
						swap
						store self.iterators.first()
						analyze self.body

						call 'I.>(I):B'
						if thn2
							pushi 1
							call 'I.+(I):I'
					    thn2:
					enditerate

					load self.iterators.first()
					call 'QJ.insertAt(IJ):QJ'

					goto eoi
			    thn:
					load self.iterators.first()
					call 'QJ.append(J):QJ'
			    eoi:
			}
		enditerate
	}

	code IteratorExp | self.iterators.size() = 1 {
		report error 'iterator \'' + self.name + '\' not supported'
	}

	code IteratorExp {
		report error 'iterator \'' + self.name + '\' not supported with several iterators'
	}
-- @end IteratorExps
-- @end PropertyCallExps
-- @end OCL

-- @begin Imperative Part

	CalledRule {	-- TODO: REFINING
		if(self.module.isRefining) {
			report error 'called rules not supported in refining mode yet'
		} else {
			operation
					context 'A'
					name self.name {
				foreach(p in self.parameters) {
					param p.varName : 'J'
				}
				foreach(v in self.variables) {
					analyze v.initExpression
					variable v named v.varName {
					[
						foreach(ope in self.ruleOutPatternElements()) {
							push ope.type.name
							push ope.type.model.name
							if (not ope.model.oclIsUndefined()) {
								push ope.model.name
								newin
							} else {
								new
							}
							variable ope named ope.varName {
							[
								foreach(ope in self.ruleOutPatternElements()) {
									load ope
									analyze ope.bindings
									pop
								}
								if(not self.actionBlock.oclIsUndefined()) {
									analyze self.actionBlock
								}
							]
							}
						}
					]
					}
				}
			}
		}
	}

	code ActionBlock {
		analyze self.statements
	}

	code BindingStat | self.source isa NavigationOrAttributeCallExp {
		analyze self.source.source
		if(self.isAssignment) {
			push self.source.name
			call 'J.refUnsetValue(S):J'
		}
		analyze self.value
		set self.source.name
	}

	code BindingStat | self.source isa VariableExp {
		analyze self.value
		if(self.source.referredVariable isa Parameter) {
			store self.source.referredVariable.varName
		} else {
			store self.source.referredVariable
		}
	}

	code BindingStat {
		report error 'only variables or navigations are allowed on the left of a binding statement'
	}

	-- TODO:
	--	- calling OperationCallExp in a special mode would not prevent its location to be written in the line number table
	--	- compiler calls to operations having no return value should also be changed into pcall
	code ExpressionStat | self.expression isa OperationCallExp {
		analyze self.expression.source
		analyze self.expression.arguments
		pcall self.expression.operationSignature
	}

	code ExpressionStat {
		analyze self.expression
	}

	code IfStat {
		analyze self.condition
		if thn
			analyze self.elseStatements
			goto eoi
	    thn:
			analyze self.thenStatements
	    eoi:
	}

	code ForStat {
		analyze self.collection
		iterate
			variable self.iterator named self.iterator.varName {
				analyze self.statements
			}
		enditerate
	}
-- @end Imperative Part
}