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/**
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*
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* OOAS Compiler (Deprecated)
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*
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* Copyright 2015, Institute for Software Technology, Graz University of
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* Technology. Portions are copyright 2015 by the AIT Austrian Institute
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* of Technology. All rights reserved.
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*
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* SEE THE "LICENSE" FILE FOR THE TERMS UNDER WHICH THIS FILE IS PROVIDED.
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*
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* Please notice that this version of the OOAS compiler is considered de-
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* precated. Only the Java version is maintained.
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*
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* Contributors:
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* Willibald Krenn (TU Graz/AIT)
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* Stefan Tiran (TU Graz/AIT)
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using TUG.Mogentes.Codegen;
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using TUG.Mogentes.Codegen.Prolog;
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namespace TUG.Mogentes.Codegen.PrologSymbolic
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{
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public class OoaPrologSymbolicExpression : OoaPrologExpression
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{
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new public class Factory : OoaPrologExpression.Factory
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{
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public override OoaPrologExpression create(OoaPrologIdentifier.Factory idFactory, OoaPrologType.Factory typeFactory, bool lhs)
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{ return new OoaPrologSymbolicExpression(idFactory, typeFactory, this, lhs); }
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}
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/*Also treats bools and enums as ints..*/
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new protected bool isNumericBinary(Expression expression)
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{
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bool result = false;
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if (expression is BinaryOperator)
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{
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TypeKind leftKind = ((BinaryOperator)expression).left.type.kind;
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TypeKind rightKind = ((BinaryOperator)expression).right.type.kind;
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result = (leftKind == TypeKind.IntType || leftKind == TypeKind.BoolType || leftKind == TypeKind.EnumeratedType) &&
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(rightKind == TypeKind.IntType || rightKind == TypeKind.BoolType || rightKind == TypeKind.EnumeratedType);
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}
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else if (expression is UnaryOperator)
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{
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TypeKind childKind = ((UnaryOperator)expression).child.type.kind;
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result = childKind == TypeKind.IntType || childKind == TypeKind.BoolType || childKind == TypeKind.EnumeratedType;
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}
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else throw new NotImplementedException();
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return result;
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}
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// we need to map all other things to Prolog constructs
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private string operatorString(Expression expression, UlyssesType resultingType)
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{
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switch (expression.kind)
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{
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case ExpressionKind.abs: // T_ABS:
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case ExpressionKind.card: // T_CARD:
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case ExpressionKind.dom: // T_DOM:
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case ExpressionKind.range: // T_RNG:
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case ExpressionKind.merge: // T_MERGE:
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case ExpressionKind.elems: // T_ELEMS:
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case ExpressionKind.head: // T_HEAD:
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case ExpressionKind.tail: // T_TAIL:
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case ExpressionKind.conc: // T_CONC:
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case ExpressionKind.inds: // T_INDS:
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case ExpressionKind.dinter: // T_DINTER:
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case ExpressionKind.dunion: // T_DUNION:
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case ExpressionKind.domresby: // T_DOMRESBY:
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case ExpressionKind.domresto: // T_DOMRESTO:
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case ExpressionKind.rngresby: // T_RNGRESBY:
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case ExpressionKind.rngresto: // T_RNGRESTO:
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case ExpressionKind.inter: // T_INTER:
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case ExpressionKind.union: // T_UNION:
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case ExpressionKind.diff: // T_DIFF:
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case ExpressionKind.munion: // T_MUNION:
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case ExpressionKind.seqmod_mapoverride: // T_SEQMOD_MAPOVERRIDE:
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case ExpressionKind.subset:
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case ExpressionKind.elemin:
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case ExpressionKind.notelemin:
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case ExpressionKind.implies: // T_IMPLIES:
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case ExpressionKind.biimplies: // T_BIIMPLIES:
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case ExpressionKind.Primed:
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case ExpressionKind.len: // T_LEN:
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throw new NotImplementedException();
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case ExpressionKind.div: // T_DIV:
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return "/";
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case ExpressionKind.idiv: // T_IDIV:
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return "/";
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case ExpressionKind.mod: // T_MOD:
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return "mod";
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case ExpressionKind.prod: // T_PROD:
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return "*";
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case ExpressionKind.sum: // T_SUM:
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return "+";
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case ExpressionKind.minus: // T_MINUS:
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return "-";
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case ExpressionKind.less:
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return resultingType.kind == TypeKind.QrType || !isNumericBinary(expression) ? "<" : "#<";
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case ExpressionKind.lessequal:
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return resultingType.kind == TypeKind.QrType || !isNumericBinary(expression) ? "=<" : "#=<";
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case ExpressionKind.greater:
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return resultingType.kind == TypeKind.QrType || !isNumericBinary(expression) ? ">" : "#>";
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case ExpressionKind.greaterequal:
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return resultingType.kind == TypeKind.QrType || !isNumericBinary(expression) ? ">=" : "#>=";
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case ExpressionKind.equal:
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return resultingType.kind == TypeKind.QrType ? "==" : "#=";
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case ExpressionKind.notequal:
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return resultingType.kind == TypeKind.QrType || !isNumericBinary(expression) ? "\\=" : "#\\=";
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case ExpressionKind.and: // T_AND:
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throw new NotImplementedException(); // implemented in binaryoperator
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case ExpressionKind.or: // T_OR:
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throw new NotImplementedException(); // implemented in binaryoperator
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case ExpressionKind.not:
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throw new NotImplementedException(); // implemented in binaryoperator
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case ExpressionKind.Cast:
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return String.Empty;
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default:
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return Enum.GetName(typeof(ExpressionKind), expression.kind);
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}
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}
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public override void visit<T>(ValueExpression<T> valueExpression)
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{
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 0);
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string tmpVar = NewTempVariable();
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m_emitter.Append(String.Format("{0} ", tmpVar));
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if (valueExpression.value == null)
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m_emitter.Append("= 'null'");
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else if (valueExpression is ValueExpression<bool>)
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m_emitter.Append((valueExpression as ValueExpression<bool>).value ? " = true" : " = false");
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else if (valueExpression is ValueExpression<char>)
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m_emitter.Append(String.Format("= '{0}'", valueExpression.ToString()));
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else if (valueExpression is ValueExpression<int>)
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m_emitter.Append(String.Format("= {0}", valueExpression.ToString()));
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else
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m_emitter.Append(String.Format("= {0}", valueExpression.value.ToString()));
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m_emitter.AppendLine(",");
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 1);
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}
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public override void visit(IdentifierExpression identifierExpression)
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{
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if (identifierExpression.identifier.kind == IdentifierKind.LandmarkIdentifier)
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{
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LandmarkIdentifier lmid = (LandmarkIdentifier)identifierExpression.identifier;
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OoaPrologIdentifier pid = createIdentifierVisitor();
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lmid.Accept(pid);
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//m_emitter.Append(pid.ToString());
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m_tmpVars.Add(pid.ToString());
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return;
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}
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else if (identifierExpression.identifier.kind == IdentifierKind.EnumIdentifier)
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{
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EnumIdentifier enumid = (EnumIdentifier)identifierExpression.identifier;
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EnumType enumType = (EnumType)enumid.type;
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//m_emitter.Append(enumType.listOfEnumSymbols.IndexOf(enumid));
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if (enumType is ValuedEnumType)
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m_emitter.AppendLine(String.Format("{0} = {1},", NewTempVariable(), enumid.Value));
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else
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m_emitter.AppendLine(String.Format("{0} = {1},", NewTempVariable(), enumType.listOfEnumSymbols.IndexOf(enumid).ToString()));
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}
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else if (identifierExpression.isSelf)
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{
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m_emitter.AppendLine(String.Format("{0} = {1},", NewTempVariable(), GetIdentifierString(identifierExpression.identifier)));
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}
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/*else if (identifierExpression.identifier.kind == IdentifierKind.AttributeIdentifier)
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{
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m_emitter.AppendLine(String.Format("getVal({1},{0},_),", NewTempVariable(), GetIdentifierString(identifierExpression.identifier)));
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}*/
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else
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{
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//m_emitter.Append(GetIdentifierString(identifierExpression.identifier));
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m_tmpVars.Add(GetIdentifierString(identifierExpression.identifier));
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}
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}
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public override void visit(UnaryOperator unaryOperator)
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{
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 0);
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VisitSub(unaryOperator.child, unaryOperator);
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if (unaryOperator.kind == ExpressionKind.Cast)
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return;
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string childresult = m_tmpVars[0]; m_tmpVars.RemoveAt(0);
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 0);
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string tmpresult = NewTempVariable();
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switch (unaryOperator.kind)
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{
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case ExpressionKind.head:
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m_emitter.AppendLine(String.Format("ulyssesListHead({1},{0}),", tmpresult, childresult));
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break;
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case ExpressionKind.tail:
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m_emitter.AppendLine(String.Format("ulyssesListTail({1},{0}),", tmpresult, childresult));
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break;
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case ExpressionKind.len: // T_LEN:
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m_emitter.AppendLine(String.Format("ulyssesListLength({1},{0}),", tmpresult, childresult));
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break;
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213
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214
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case ExpressionKind.not:
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215
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// if (unaryOperator.type.kind == TypeKind.IntType)
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// m_emitter.Append(String.Format(" {0} #= call(\\+", tmpresult));
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// else
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218
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m_emitter.Append(String.Format(" {0} = ( #\\", tmpresult));
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219
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m_emitter.Append("(");
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220
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m_emitter.Append(childresult);
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221
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m_emitter.AppendLine(")),");
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222
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break;
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223
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224
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case ExpressionKind.Cast:
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225
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// todo
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226
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break;
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227
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228
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default:
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229
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// do not use #= for assignments in the symbolic backend
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230
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// if (unaryOperator.type.kind == TypeKind.IntType)
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231
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// m_emitter.Append(String.Format(" {0} #= ({1}", tmpresult, operatorString(unaryOperator, unaryOperator.child.type)));
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232
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// else
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233
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m_emitter.Append(String.Format(" {0} = ({1}", tmpresult, operatorString(unaryOperator, unaryOperator.child.type)));
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234
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m_emitter.Append("(");
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235
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m_emitter.Append(childresult);
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236
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m_emitter.AppendLine(")),");
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237
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break;
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238
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}
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239
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 1);
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240
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}
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241
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242
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public override void visit(BinaryOperator binaryOperator)
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243
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{
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244
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// eval stack must be empty
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245
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 0);
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246
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247
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OoaCodeEmitter origEmitter = m_emitter;
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248
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OoaCodeEmitter leftcode = new OoaCodeEmitter();
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249
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OoaCodeEmitter rightcode = new OoaCodeEmitter();
|
|
250
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251
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252
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// traverse left
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253
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m_emitter = leftcode;
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254
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VisitSub(binaryOperator.left, binaryOperator);
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255
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string leftresult = m_tmpVars[0]; m_tmpVars.RemoveAt(0);
|
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256
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 0);
|
|
257
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|
|
258
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// traverse right
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259
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m_emitter = rightcode;
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260
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VisitSub(binaryOperator.right, binaryOperator);
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261
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string rightresult = m_tmpVars[0]; m_tmpVars.RemoveAt(0);
|
|
262
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// eval stack must be empty
|
|
263
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System.Diagnostics.Debug.Assert(m_tmpVars.Count == 0);
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264
|
|
|
265
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// restore original emitter and get tmp.var
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266
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m_emitter = origEmitter;
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267
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string tmpVar = NewTempVariable();
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268
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|
|
269
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switch (binaryOperator.kind)
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270
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{
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|
271
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case ExpressionKind.elemin:
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272
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m_emitter.Append(leftcode.ToString());
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273
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m_emitter.Append(rightcode.ToString());
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274
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m_emitter.AppendLine(String.Format(" {0} = member({1},{2}),",
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275
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tmpVar, leftresult, rightresult));
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276
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break;
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277
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case ExpressionKind.and: // T_AND:
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278
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m_emitter.Append(leftcode.ToString());
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279
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m_emitter.Append(rightcode.ToString());
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280
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m_emitter.AppendLine(String.Format(" {0} = ({1} {2} {3}), ",
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281
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tmpVar, leftresult, "#/\\", rightresult));
|
|
282
|
break;
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|
283
|
case ExpressionKind.or: // T_OR:
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284
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m_emitter.Append(leftcode.ToString());
|
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285
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m_emitter.Append(rightcode.ToString());
|
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286
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m_emitter.AppendLine(String.Format(" {0} = ({1} {2} {3}), ",
|
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287
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tmpVar, leftresult, "#\\/", rightresult));
|
|
288
|
break;
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|
289
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|
290
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case ExpressionKind.implies:
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291
|
m_emitter.Append(leftcode.ToString());
|
|
292
|
m_emitter.AppendLine(String.Format(" {0} = ({1} -> ({2}{3}); true), ", // {0} = (({1} -> ({2}{3}); true))
|
|
293
|
tmpVar, leftresult, rightcode.ToString(), rightresult));
|
|
294
|
break;
|
|
295
|
|
|
296
|
case ExpressionKind.equal:
|
|
297
|
m_emitter.Append(leftcode.ToString());
|
|
298
|
m_emitter.Append(rightcode.ToString());
|
|
299
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/*check if we have tupleconstructors as matchers*/
|
|
300
|
TupleConstructor matcher = null;
|
|
301
|
string aTuple = null;
|
|
302
|
if (binaryOperator.left.kind == ExpressionKind.TupleConstr &&
|
|
303
|
((TupleConstructor)binaryOperator.left).isMatcher)
|
|
304
|
{
|
|
305
|
matcher = (TupleConstructor)binaryOperator.left;
|
|
306
|
aTuple = rightresult;
|
|
307
|
}
|
|
308
|
else if (binaryOperator.right.kind == ExpressionKind.TupleConstr &&
|
|
309
|
((TupleConstructor)binaryOperator.right).isMatcher)
|
|
310
|
{
|
|
311
|
matcher = (TupleConstructor)binaryOperator.right;
|
|
312
|
aTuple = leftresult;
|
|
313
|
}
|
|
314
|
|
|
315
|
if (matcher == null)
|
|
316
|
m_emitter.AppendLine(String.Format(" {0} = ({1} {2} {3}), ",
|
|
317
|
tmpVar, leftresult, operatorString(binaryOperator, binaryOperator.left.type), rightresult));
|
|
318
|
else
|
|
319
|
{
|
|
320
|
m_emitter.Append(String.Format("{0} = unify({1} = [", tmpVar, aTuple));
|
|
321
|
int cntr = 0;
|
|
322
|
foreach (var x in matcher.values)
|
|
323
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{
|
|
324
|
if (cntr != 0)
|
|
325
|
m_emitter.Append(", ");
|
|
326
|
else
|
|
327
|
cntr++;
|
|
328
|
|
|
329
|
if (x.kind != ExpressionKind.Identifier)
|
|
330
|
throw new ArgumentException();
|
|
331
|
|
|
332
|
IdentifierExpression ident = (IdentifierExpression)x;
|
|
333
|
OoaPrologIdentifier avisitor = createIdentifierVisitor();
|
|
334
|
ident.Accept(avisitor);
|
|
335
|
m_emitter.Append(avisitor.ToString());
|
|
336
|
}
|
|
337
|
m_emitter.AppendLine("]),");
|
|
338
|
}
|
|
339
|
break;
|
|
340
|
|
|
341
|
|
|
342
|
|
|
343
|
case ExpressionKind.conc:
|
|
344
|
m_emitter.Append(leftcode.ToString());
|
|
345
|
m_emitter.Append(rightcode.ToString());
|
|
346
|
m_emitter.AppendLine(String.Format("ulyssesListConc({1},{2},{0}),", tmpVar, leftresult, rightresult));
|
|
347
|
break;
|
|
348
|
|
|
349
|
default:
|
|
350
|
m_emitter.Append(leftcode.ToString());
|
|
351
|
m_emitter.Append(rightcode.ToString());
|
|
352
|
if (binaryOperator.left.type.kind == TypeKind.QrType)
|
|
353
|
m_emitter.Append("qEval");
|
|
354
|
|
|
355
|
// do not use #= for assignments in the symbolic backend
|
|
356
|
// if (binaryOperator.type.kind == TypeKind.IntType)
|
|
357
|
// m_emitter.AppendLine(String.Format(" {0} #= ({1} {2} {3}), ",
|
|
358
|
// tmpVar, leftresult, operatorString(binaryOperator, binaryOperator.left.type), rightresult));
|
|
359
|
// else
|
|
360
|
|
|
361
|
m_emitter.AppendLine(String.Format(" {0} = ({1} {2} {3}), ",
|
|
362
|
tmpVar, leftresult, operatorString(binaryOperator, binaryOperator.left.type), rightresult));
|
|
363
|
break;
|
|
364
|
}
|
|
365
|
System.Diagnostics.Debug.Assert(m_tmpVars.Count == 1);
|
|
366
|
}
|
|
367
|
|
|
368
|
|
|
369
|
|
|
370
|
protected OoaPrologSymbolicExpression(
|
|
371
|
OoaPrologIdentifier.Factory idFactory,
|
|
372
|
OoaPrologType.Factory typeFactory,
|
|
373
|
OoaPrologExpression.Factory expressionFactory,
|
|
374
|
bool lhs)
|
|
375
|
: base(idFactory, typeFactory, expressionFactory, lhs)
|
|
376
|
{ }
|
|
377
|
|
|
378
|
}
|
|
379
|
}
|