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-- @name		ACG
-- @version		1.0
-- @domains		MDE/Model Transformation, ATL VM
-- @authors		Frédéric Jouault
-- @date		2007/07/25
-- @description	ACG (ATL Code Generator) is a code generator language that targets the ATL VM. The ATL 2006 compiler is written in ACG.
package ACG {

	abstract class LocatedElement {
		attribute location : String;
		attribute commentsBefore[*] ordered : String;
		attribute commentsAfter[*] ordered : String;
	}

	class ACG extends LocatedElement {
		attribute metamodel : String;
		attribute startsWith : String;
		reference elements[*] ordered container : ACGElement oppositeOf acg;
	}

	abstract class ACGElement extends LocatedElement {
		reference acg : ACG oppositeOf elements;
	}

	class Function extends ACGElement {
		attribute context : String;
		attribute name : String;
		reference parameters[*] ordered container : Parameter;
		reference body container : Expression;
	}

	class Attribute extends ACGElement {
		attribute context : String;
		attribute name : String;
		reference body container : Expression;
	}

	class Parameter extends VariableDecl {}

-- @begin Nodes
	abstract class Node extends ACGElement, StatementBlock {
		attribute element : String;
		attribute mode[0-1] : String;
		reference guard[0-1] container : Expression;
	}

	class ASMNode extends Node {
		reference name container : Expression;
	}

	class CodeNode extends Node {
	}

	class SimpleNode extends Node {}
-- @end Nodes

	abstract class StatementBlock extends LocatedElement {
		reference statements[*] ordered container : Statement;
	}

-- @begin Statements
	abstract class Statement extends LocatedElement {
	}

-- @begin CompoundStats
	abstract class CompoundStat extends Statement, StatementBlock {}

	class ForEachStat extends CompoundStat {
		reference iterator container : VariableDecl;
		reference collection container : Expression;
	}

	class OnceStat extends CompoundStat {}

	class VariableStat extends CompoundStat {
		reference definition container : Expression;
		reference name container : Expression;
	}

	class OperationStat extends CompoundStat {
		reference context container : Expression;
		reference name container : Expression;
	}

	class ConditionalStat extends CompoundStat {
		reference condition container : Expression;
		reference elseStatements[*] ordered container : Statement;
	}

	class LetStat extends CompoundStat {
		reference variable container : VariableDecl;
		reference value container : Expression;
	}

	class AnalyzeStat extends CompoundStat {
		reference target container : Expression;
		attribute mode[0-1] : String;
	}
-- @end CompoundStats

	class ReportStat extends Statement {
		attribute severity : Severity;
		reference message container : Expression;
	}
	
	enumeration Severity {
		literal critic;
		literal error;
		literal warning;
	}

	class FieldStat extends Statement {
		reference name container : Expression;
		reference type container : Expression;
	}

	class ParamStat extends Statement {
		reference name container : Expression;
		reference type container : Expression;
	}

-- @begin EmitStats
	abstract class EmitStat extends Statement {}

	class LabelStat extends EmitStat {
		attribute name : String;
		reference id[0-1] container : Expression;
	}

	class NewStat extends EmitStat {}
	
	class NewinStat extends EmitStat {}

	class DeleteStat extends EmitStat {}

	class DupStat extends EmitStat {}

	class DupX1Stat extends EmitStat {}

	class PopStat extends EmitStat {}

	class SwapStat extends EmitStat {}

	class IterateStat extends EmitStat {}

	class EndIterateStat extends EmitStat {}

	class GetAsmStat extends EmitStat {}

	class FindMEStat extends EmitStat {}

	class PushTStat extends EmitStat {}

	class PushFStat extends EmitStat {}

-- @begin EmitWithOperandStats
	abstract class EmitWithOperandStat extends EmitStat {
		reference operand container : Expression;
	}

	class PushStat extends EmitWithOperandStat {}

	class PushIStat extends EmitWithOperandStat {}

	class PushDStat extends EmitWithOperandStat {}

	class LoadStat extends EmitWithOperandStat {}

	class StoreStat extends EmitWithOperandStat {}

	class CallStat extends EmitWithOperandStat {}

	class PCallStat extends EmitWithOperandStat {}

	class SuperCallStat extends EmitWithOperandStat {}

	class GetStat extends EmitWithOperandStat {}

	class SetStat extends EmitWithOperandStat {}
-- @end EmitWithOperandStats

-- @begin EmitWithLabelRefStats
	abstract class EmitWithLabelRefStat extends EmitStat {
		reference label : LabelStat;
	}

	class IfStat extends EmitWithLabelRefStat {}

	class GotoStat extends EmitWithLabelRefStat {}
-- @end EmitWithLabelRefStats
-- @end EmitStats
-- @end Statements

	class VariableDecl extends LocatedElement {
		attribute name : String;
	}

-- @begin Expressions
	abstract class Expression extends LocatedElement {
	}

	class VariableExp extends Expression {
		reference variable : VariableDecl;
	}

	class SelfExp extends Expression {}

	class LastExp extends Expression {}

	class IfExp extends Expression {
		reference condition container : Expression;
		reference thenExp container : Expression;
		reference elseExp container : Expression;
	}

	class IsAExp extends Expression {
		reference source container : Expression;
		attribute type : String;
	}

	class LetExp extends Expression {
		reference variable container : VariableDecl;
		reference value container : Expression;
		reference in container : Expression;
	}

-- @begin PropertyCallExps
	abstract class PropertyCallExp extends Expression {
		reference source container : Expression;
		attribute name : String;
	}

	class NavigationExp extends PropertyCallExp {}

	class IteratorExp extends PropertyCallExp {
		reference iterator container : VariableDecl;
		reference body container : Expression;
	}

	class OperationCallExp extends PropertyCallExp {
		reference arguments[*] ordered container : Expression;
	}

	class OperatorCallExp extends OperationCallExp {}
-- @end PropertyCallExps

-- @begin LiteralExps
	abstract class LiteralExp extends Expression {}

	class OclUndefinedExp extends LiteralExp {}

-- @begin CollectionExps
	abstract class CollectionExp extends LiteralExp {
		reference elements[*] ordered container : Expression;
	}

	class SequenceExp extends CollectionExp {}
-- @begin CollectionExps

-- @begin Primitive LiteralExps
	class BooleanExp extends LiteralExp {
		attribute value : Boolean;
	}

	class IntegerExp extends LiteralExp {
		attribute value : Integer;
	}

	class StringExp extends LiteralExp {
		attribute value : String;
	}
-- @end Primitive LiteralExps
-- @end LiteralExps
-- @end Expressions
}

package PrimitiveTypes {
	datatype Boolean;
	datatype Integer;
	datatype String;
}