root / trunk / compiler / ooasCompiler / src / org / momut / ooas / ast / types / Type.java @ 10
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/**
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*
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* OOAS Compiler
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*
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* Copyright 2015, AIT Austrian Institute of Technology.
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* This code is based on the C# Version of the OOAS Compiler, which is
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* copyright 2015 by the Institute of Software Technology, Graz University
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* of Technology with portions copyright by the AIT Austrian Institute of
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* 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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* If you modify the file please update the list of contributors below to in-
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* clude your name. Please also stick to the coding convention of using TABs
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* to do the basic (block-level) indentation and spaces for anything after
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* that. (Enable the display of special chars and it should be pretty obvious
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* what this means.) Also, remove all trailing whitespace.
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*
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* Contributors:
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* Willibald Krenn (AIT)
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* Stephan Zimmerer (AIT)
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* Markus Demetz (AIT)
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* Christoph Czurda (AIT)
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*
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*/
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package org.momut.ooas.ast.types; |
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import java.util.Iterator; |
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import org.momut.ooas.ast.AstNode; |
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import org.momut.ooas.ast.AstNodeTypeEnum; |
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import org.momut.ooas.ast.IAst; |
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import org.momut.ooas.ast.IAstVisitor; |
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import org.momut.ooas.ast.identifiers.TypeIdentifier; |
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import org.momut.ooas.utils.exceptions.ArgumentException; |
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import org.momut.ooas.utils.exceptions.NotImplementedException; |
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import org.momut.ooas.utils.exceptions.OoasCompilerRuntimeException; |
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public abstract class Type extends AstNode implements IAst |
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{
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private String m_origAnonName; |
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protected TypeKind m_kind;
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protected TypeIdentifier m_identifier;
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protected int m_hash; |
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// protected long TimeStamp = DateTime.Now.Ticks;
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public TypeKind kind() { return m_kind; } |
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public TypeIdentifier identifier() {
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synchronized(this) { |
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if (m_identifier == null) |
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SetupAnonymousName(); |
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} |
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return m_identifier;
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} |
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public boolean isAnonymousType() { |
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final String anonName = AnonymousName(); |
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if (!m_origAnonName.equals(anonName))
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throw new OoasCompilerRuntimeException("Internal Error: Anonymous Name changed from '%s' to '%s'.", m_origAnonName, anonName); |
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return anonName.equals(m_identifier.tokenText());
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} |
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protected Type(TypeKind aKind, TypeIdentifier anIdentifier) |
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{
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m_kind = aKind; |
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m_identifier = anIdentifier; |
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m_hash = aKind.toString().hashCode(); //Enum.GetName(typeof(TypeKind), aKind).GetHashCode();
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} |
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@Override
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public String toString() |
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{
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return identifier().tokenText();
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} |
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public /*virtual*/ String AnonymousName() |
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{
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throw new NotImplementedException(); |
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} |
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public void SetTypeIdentifier(TypeIdentifier anId) |
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{
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m_identifier = anId; |
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} |
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public void SetupAnonymousName() |
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{
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if (m_identifier == null) |
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{
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final String anonymousName = this.AnonymousName(); |
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m_identifier = new TypeIdentifier(anonymousName, this, null); |
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m_origAnonName = anonymousName; |
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} |
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} |
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@Override
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public AstNodeTypeEnum nodeType() { return AstNodeTypeEnum.type; } |
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@Override
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public void Accept(IAstVisitor visitor) |
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{
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throw new NotImplementedException(); |
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} |
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public boolean IsNumeric() |
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{
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final Object o = this; |
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return (m_kind == TypeKind.IntType) ||
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(m_kind == TypeKind.FloatType) || |
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(m_kind == TypeKind.EnumeratedType && o instanceof ValuedEnumType);
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} |
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/**
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* returns the number of unique values of the type (2 for bool, etc..)
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*/
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public int valueCount() { |
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throw new NotImplementedException(); // must be overridden by child |
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} |
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public static String High(Type atype) |
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{
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switch (atype.kind())
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{
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case BoolType:
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return "1"; |
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case EnumeratedType:
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return Integer.toString((((EnumType)atype).listOfEnumSymbols().size() - 1)); |
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case IntType:
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return Integer.toString(((IntType)atype).rangeHigh()); |
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case FloatType:
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return Double.toString(((FloatType)atype).high()); |
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default:
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throw new NotImplementedException(); |
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} |
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} |
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public static String Low(Type atype) |
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{
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switch (atype.kind())
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{
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case BoolType:
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return "0"; |
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case EnumeratedType:
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return "0"; |
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case IntType:
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return Integer.toString(((IntType)atype).rangeLow()); |
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case FloatType:
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return Double.toString(((FloatType)atype).low()); |
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// case TypeKind.QrType:
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// return "0";
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default:
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throw new NotImplementedException(); |
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} |
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} |
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/// <summary>
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/// Returns a cover for two types (if possible).
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/// note the cover type for two ints, floats, etc. will have max/min values
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/// that reflect the maximum of the two operands.
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/// </summary>
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public static Type CoverType(Type type1, Type type2) |
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{
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/*first some sanity checks*/
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if (type1 == null) |
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throw new ArgumentException("type1 null"); |
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if (type2 == null) |
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throw new ArgumentException("type2 null"); |
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if (type1.kind() == TypeKind.OpaqueType)
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throw new ArgumentException("type1 opaque type"); |
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if (type2.kind() == TypeKind.OpaqueType)
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throw new ArgumentException("type2 opaque type"); |
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if (type1 == type2)
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return type1;
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if (Type.TypeEqual(type1, type2)) |
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return type1;
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final TypeKind tk1 = type1.kind();
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final TypeKind tk2 = type2.kind();
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if (tk1 != tk2)
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{
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// the only notion we support here is int->float and valenum -> int
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if ((tk1 == TypeKind.IntType || tk2 == TypeKind.IntType)
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&& (tk1 == TypeKind.FloatType || tk2 == TypeKind.FloatType)) |
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{
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final IntType aInt = tk1 == TypeKind.IntType ? (IntType)type1 : (IntType)type2;
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final FloatType aFloat = tk1 == TypeKind.IntType ? (FloatType)type2 : (FloatType)type1;
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final double low = aInt.rangeLow() < aFloat.low() ? (double)aInt.rangeLow() : aFloat.low(); |
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final double high = aInt.rangeHigh() < aFloat.high() ? aFloat.high() : (double)aInt.rangeHigh(); |
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final double precision = aFloat.precision() > 1 ? 1.0 : aFloat.precision(); |
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return new FloatType(low, high, precision, null); |
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} |
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else if ((tk1 == TypeKind.IntType || tk2 == TypeKind.IntType) |
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&& (tk1 == TypeKind.EnumeratedType || tk2 == TypeKind.EnumeratedType)) |
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{
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final IntType intt1 = tk1 == TypeKind.IntType ? (IntType)type1 : (IntType)type2;
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final EnumType anEnum = tk1 == TypeKind.IntType ? (EnumType)type2 : (EnumType)type1;
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if (anEnum instanceof ValuedEnumType) |
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{
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final IntType intt2 = ((ValuedEnumType)anEnum).getIntType();
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final int low = intt1.rangeLow() < intt2.rangeLow() ? intt1.rangeLow() : intt2.rangeLow(); |
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final int high = intt1.rangeHigh() > intt2.rangeHigh() ? intt1.rangeHigh() : intt2.rangeHigh(); |
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return new IntType(low, high, null); |
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} |
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else
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return null; |
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} |
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else if (tk1 == TypeKind.Any || tk2 == TypeKind.Any) |
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{
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final AnyType freeVar = tk1 == TypeKind.Any ? (AnyType)type1 : (AnyType)type2;
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final Type fixedType = tk1 == TypeKind.Any ? type2 : type1; |
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final Type newcover = freeVar.VariableIdentifier().type().kind() == TypeKind.Any |
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? fixedType : CoverType(fixedType, freeVar.VariableIdentifier().type()); |
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freeVar.VariableIdentifier().SetType(newcover); |
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return newcover;
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} |
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else if (tk1 == TypeKind.OoActionSystemType && tk2 == TypeKind.Null) |
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{
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return type1;
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} |
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else if (tk2 == TypeKind.OoActionSystemType && tk1 == TypeKind.Null) |
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{
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return type2;
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} |
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else
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return null; |
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} |
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else
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{
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switch (tk1)
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{
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case Any:
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return type1;
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case IntType:
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final IntType intt1 = (IntType)type1;
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final IntType intt2 = (IntType)type2;
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final int low = intt1.rangeLow() < intt2.rangeLow() ? intt1.rangeLow() : intt2.rangeLow(); |
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final int high = intt1.rangeHigh() > intt2.rangeHigh() ? intt1.rangeHigh() : intt2.rangeHigh(); |
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return new IntType(low, high, null); |
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case BoolType:
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return type1;
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case FloatType:
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final FloatType floatt1 = (FloatType)type1;
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final FloatType floatt2 = (FloatType)type2;
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final double flow = floatt1.low() < floatt2.low() ? floatt1.low() : floatt2.low(); |
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final double fhigh = floatt1.high() > floatt2.high() ? floatt1.high() : floatt2.high(); |
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final double fprec = floatt1.precision() < floatt2.precision() ? floatt1.precision() : floatt2.precision(); |
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return new FloatType(flow, fhigh, fprec, null); |
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case EnumeratedType:
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return null; |
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case ListType:
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final ListType listt1 = (ListType)type1;
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final ListType listt2 = (ListType)type2;
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// empty lists lack type, so take the other one
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if ((listt1.innerType().kind() == TypeKind.Null) && (listt2.innerType().kind() != TypeKind.Null))
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return listt2;
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else if ((listt2.innerType().kind() == TypeKind.Null) && (listt1.innerType().kind() != TypeKind.Null)) |
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return listt1;
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else if (listt1.innerType().kind() == TypeKind.Null && listt2.innerType().kind() == TypeKind.Null) |
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return listt1;
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else
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{
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/**
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* A cover type of a list must not change the size of the inner type. Mostly what is
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* allowed to change is the list length.
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*/
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Type subtype = listt1.innerType();
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final boolean castAllowed = TypeEqual(listt1.innerType(), listt2.innerType()) |
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|| ( (listt1.innerType().kind() == TypeKind.OoActionSystemType) |
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&& (subtype = Type.CoverType(listt1.innerType(), listt2.innerType())) != null); |
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if (castAllowed){
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final int maxelems = listt1.maxNumberOfElements() > listt2.maxNumberOfElements() |
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? listt1.maxNumberOfElements() |
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: listt2.maxNumberOfElements(); |
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return new ListType(subtype, maxelems, null); |
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} else
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return null; |
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// // The code blow allowed for bit-size changes of the inner type and is considered too
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// // liberal. If a deep cast is necessary, the user might want to do a fold operation
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// // instead..
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// final Type subtype = Type.CoverType(listt1.innerType(), listt2.innerType());
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// if (subtype != null)
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// return new ListType(subtype, maxelems, null);
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// else
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// return null;
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} |
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case MapType:
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final MapType mapt1 = (MapType)type1;
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final MapType mapt2 = (MapType)type2;
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// empty maps lack type, so take the other one.
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if ((mapt1.fromType().kind() == TypeKind.Null && mapt1.toType().kind() == TypeKind.Null)
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&& (mapt2.fromType().kind() != TypeKind.Null && mapt2.toType().kind() != TypeKind.Null)) |
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return mapt2;
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else if ((mapt2.fromType().kind() == TypeKind.Null && mapt2.toType().kind() == TypeKind.Null) |
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&& (mapt1.fromType().kind() != TypeKind.Null && mapt1.toType().kind() != TypeKind.Null)) |
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return mapt1;
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else if ((mapt2.fromType().kind() == TypeKind.Null && mapt2.toType().kind() == TypeKind.Null) |
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&& (mapt1.fromType().kind() == TypeKind.Null && mapt1.toType().kind() == TypeKind.Null)) |
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return mapt1;
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else
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{
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final Type sub1 = Type.CoverType(mapt1.fromType(), mapt2.fromType()); |
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final Type sub2 = Type.CoverType(mapt2.toType(), mapt2.toType()); |
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final int maxelems = mapt1.maxNumberOfElements() > mapt2.maxNumberOfElements() ? |
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mapt1.maxNumberOfElements() : mapt2.maxNumberOfElements(); |
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if (sub1 != null && sub2 != null) |
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return new MapType(sub1, sub2, maxelems, null); |
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else
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return null; |
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} |
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case TupleType:
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final TupleType tuplet1 = (TupleType)type1;
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final TupleType tuplet2 = (TupleType)type2;
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final TupleType result = new TupleType(null); |
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final Iterator<Type> innert1 = tuplet1.innerTypes().iterator(); |
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final Iterator<Type> innert2 = tuplet2.innerTypes().iterator(); |
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while (innert1.hasNext())
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{
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final Type newinner = Type.CoverType(innert1.next(), innert2.next()); |
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if (newinner == null) |
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return null; |
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result.AddType(newinner); |
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} |
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return result;
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case OoActionSystemType:
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if (type1.kind() == TypeKind.Null && type2.kind() != TypeKind.Null)
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return type2;
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else if (type2.kind() == TypeKind.Null && type1.kind() != TypeKind.Null) |
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return type1;
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else if (type1.kind() == TypeKind.Null && type2.kind() == TypeKind.Null) |
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return type2;
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else if (type1 == type2) // ref equals! |
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return type1;
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else
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return ClassBaseType((OoActionSystemType)type1, (OoActionSystemType)type2);
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case OpaqueType:
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assert(false); |
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return null; |
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default:
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throw new NotImplementedException(); |
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} |
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} |
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} |
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private static Type ClassBaseType(OoActionSystemType type1, OoActionSystemType type2) |
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{
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// this is rather inefficient.. should be done differently
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final OoActionSystemType typea = type1;
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final OoActionSystemType typeb = type2;
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OoActionSystemType basea = type1; |
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OoActionSystemType baseb = type2; |
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while (basea != null) |
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{
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if (basea == typeb) // ref equals |
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return basea;
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basea = basea.baseType(); |
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} |
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while (baseb != null) |
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{
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if (baseb == typea) // ref equals |
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return baseb;
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baseb = baseb.baseType(); |
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} |
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return null; |
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} |
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|
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public static boolean FirstTypeLessRange(Type type1, Type type2) |
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{
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final TypeKind tk1 = type1.kind();
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final TypeKind tk2 = type2.kind();
|
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if (tk1 != tk2)
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throw new ArgumentException("Types need to be equal"); |
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switch (tk1)
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{
|
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case Any:
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return false; |
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case IntType:
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final IntType Int1 = (IntType)type1;
|
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final IntType Int2 = (IntType)type2;
|
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return Int1.rangeLow() > Int2.rangeLow() ||
|
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Int1.rangeHigh() < Int2.rangeHigh(); |
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case BoolType:
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return false; |
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case FloatType:
|
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final FloatType Float1 = (FloatType)type1;
|
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final FloatType Float2 = (FloatType)type2;
|
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return Float1.low() > Float2.low()
|
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|| Float1.high() < Float2.high() |
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|| Float1.precision() > Float2.precision(); |
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case EnumeratedType:
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return false; |
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case ListType:
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final ListType listt1 = (ListType)type1;
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final ListType listt2 = (ListType)type2;
|
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return (listt1.maxNumberOfElements() < listt2.maxNumberOfElements()) ||
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Type.FirstTypeLessRange(listt1.innerType(), listt2.innerType());
|
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case MapType:
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final MapType mapt1 = (MapType)type1;
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final MapType mapt2 = (MapType)type2;
|
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return (mapt1.maxNumberOfElements() < mapt2.maxNumberOfElements()) ||
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Type.FirstTypeLessRange(mapt1.fromType(), mapt2.fromType()) ||
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Type.FirstTypeLessRange(mapt1.toType(), mapt2.toType());
|
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case TupleType:
|
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final TupleType tuplet1 = (TupleType)type1;
|
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final TupleType tuplet2 = (TupleType)type2;
|
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if (tuplet1.innerTypes().size() != tuplet2.innerTypes().size())
|
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return false; |
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final Iterator<Type> innert1 = tuplet1.innerTypes().iterator(); |
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final Iterator<Type> innert2 = tuplet2.innerTypes().iterator(); |
| 433 |
while (innert1.hasNext())
|
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{
|
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if (Type.FirstTypeLessRange(innert1.next(), innert2.next())) |
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return true; |
| 437 |
} |
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return false; |
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case OoActionSystemType:
|
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return false; |
| 441 |
case OpaqueType:
|
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assert(false); |
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return false; |
| 444 |
default:
|
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throw new NotImplementedException(); |
| 446 |
} |
| 447 |
} |
| 448 |
|
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public static boolean TypeEqualByKind(Type type1, Type type2) |
| 450 |
{
|
| 451 |
if ((type1 == null) || (type2 == null)) |
| 452 |
return false; |
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|
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final TypeKind tk1 = type1.kind();
|
| 455 |
final TypeKind tk2 = type2.kind();
|
| 456 |
|
| 457 |
// if of different kind, then return false..
|
| 458 |
if (tk1 != tk2)
|
| 459 |
return false; |
| 460 |
|
| 461 |
// if same kind, make a rigorous check
|
| 462 |
switch (tk1)
|
| 463 |
{
|
| 464 |
case Any:
|
| 465 |
return true; |
| 466 |
|
| 467 |
case IntType:
|
| 468 |
case BoolType:
|
| 469 |
case FloatType:
|
| 470 |
return true; |
| 471 |
case EnumeratedType:
|
| 472 |
return type1 == type2; // ref equals |
| 473 |
case ListType:
|
| 474 |
final ListType listt1 = (ListType)type1;
|
| 475 |
final ListType listt2 = (ListType)type2;
|
| 476 |
return Type.TypeEqualByKind(listt1.innerType(), listt2.innerType()); |
| 477 |
case MapType:
|
| 478 |
final MapType mapt1 = (MapType)type1;
|
| 479 |
final MapType mapt2 = (MapType)type2;
|
| 480 |
return Type.TypeEqualByKind(mapt1.fromType(), mapt2.fromType()) && |
| 481 |
Type.TypeEqualByKind(mapt1.toType(), mapt2.toType());
|
| 482 |
case TupleType:
|
| 483 |
final TupleType tuplet1 = (TupleType)type1;
|
| 484 |
final TupleType tuplet2 = (TupleType)type2;
|
| 485 |
if (tuplet1.innerTypes().size() != tuplet2.innerTypes().size())
|
| 486 |
return false; |
| 487 |
final Iterator<Type> innert1 = tuplet1.innerTypes().iterator(); |
| 488 |
final Iterator<Type> innert2 = tuplet2.innerTypes().iterator(); |
| 489 |
while (innert1.hasNext())
|
| 490 |
{
|
| 491 |
if (!Type.TypeEqualByKind(innert1.next(), innert2.next())) |
| 492 |
return false; |
| 493 |
} |
| 494 |
return true; |
| 495 |
case OoActionSystemType:
|
| 496 |
return type1 == type2; // ref equ. |
| 497 |
case OpaqueType:
|
| 498 |
assert(false); |
| 499 |
return false; |
| 500 |
default:
|
| 501 |
throw new NotImplementedException(); |
| 502 |
} |
| 503 |
} |
| 504 |
|
| 505 |
|
| 506 |
public static boolean TypeEqual(Type type1, Type type2) |
| 507 |
{
|
| 508 |
// this will also work with opaque types...
|
| 509 |
while (type1 instanceof OpaqueType) |
| 510 |
type1 = ((OpaqueType)type1).resolvedType(); |
| 511 |
while (type2 instanceof OpaqueType) |
| 512 |
type2 = ((OpaqueType)type2).resolvedType(); |
| 513 |
|
| 514 |
if ((type1 == null) || (type2 == null)) |
| 515 |
return false; |
| 516 |
|
| 517 |
final TypeKind tk1 = type1.kind();
|
| 518 |
final TypeKind tk2 = type2.kind();
|
| 519 |
|
| 520 |
// if of different kind, then return false..
|
| 521 |
if (tk1 != tk2)
|
| 522 |
return false; |
| 523 |
|
| 524 |
// if same kind, make a rigorous check
|
| 525 |
switch (tk1)
|
| 526 |
{
|
| 527 |
case IntType:
|
| 528 |
final IntType intt1 = (IntType)type1;
|
| 529 |
final IntType intt2 = (IntType)type2;
|
| 530 |
return intt1.rangeLow() == intt2.rangeLow() &&
|
| 531 |
intt1.rangeHigh() == intt2.rangeHigh(); |
| 532 |
case BoolType:
|
| 533 |
return true; |
| 534 |
case FloatType:
|
| 535 |
final FloatType floatt1 = (FloatType)type1;
|
| 536 |
final FloatType floatt2 = (FloatType)type2;
|
| 537 |
return floatt1.low() == floatt2.low() &&
|
| 538 |
floatt1.high() == floatt2.high() && |
| 539 |
floatt1.precision() == floatt2.precision(); |
| 540 |
case EnumeratedType:
|
| 541 |
return type1 == type2; // ref equ |
| 542 |
case ListType:
|
| 543 |
final ListType listt1 = (ListType)type1;
|
| 544 |
final ListType listt2 = (ListType)type2;
|
| 545 |
// an empty list can be of any type..
|
| 546 |
/*if ((listt1.innerType.kind == TypeKind.Null) || (listt2.innerType.kind == TypeKind.Null))
|
| 547 |
return true;
|
| 548 |
else*/
|
| 549 |
return Type.TypeEqual(listt1.innerType(), listt2.innerType()) && |
| 550 |
listt1.maxNumberOfElements() == listt2.maxNumberOfElements(); // need this because of covertype
|
| 551 |
case MapType:
|
| 552 |
final MapType mapt1 = (MapType)type1;
|
| 553 |
final MapType mapt2 = (MapType)type2;
|
| 554 |
return Type.TypeEqual(mapt1.fromType(), mapt2.fromType()) && |
| 555 |
Type.TypeEqual(mapt1.toType(), mapt2.toType()) &&
|
| 556 |
mapt1.maxNumberOfElements() == mapt2.maxNumberOfElements(); // need this because of covertype
|
| 557 |
case TupleType:
|
| 558 |
final TupleType tuplet1 = (TupleType)type1;
|
| 559 |
final TupleType tuplet2 = (TupleType)type2;
|
| 560 |
if (tuplet1.innerTypes().size() != tuplet2.innerTypes().size())
|
| 561 |
return false; |
| 562 |
final Iterator<Type> innert1 = tuplet1.innerTypes().iterator(); |
| 563 |
final Iterator<Type> innert2 = tuplet2.innerTypes().iterator(); |
| 564 |
while (innert1.hasNext())
|
| 565 |
{
|
| 566 |
if (!Type.TypeEqual(innert1.next(), innert2.next())) |
| 567 |
return false; |
| 568 |
} |
| 569 |
return true; |
| 570 |
case OoActionSystemType:
|
| 571 |
return type1 == type2; // ref equ. // || Covariance((OoActionSystemType)type1, (OoActionSystemType)type2); |
| 572 |
case OpaqueType:
|
| 573 |
assert(false); |
| 574 |
return false; |
| 575 |
case Null:
|
| 576 |
case Any:
|
| 577 |
return true; |
| 578 |
default:
|
| 579 |
throw new NotImplementedException(); |
| 580 |
} |
| 581 |
} |
| 582 |
|
| 583 |
/// <summary>
|
| 584 |
/// checks if type 2 is a desc. of type 1
|
| 585 |
/// </summary>
|
| 586 |
public static boolean Covariance(OoActionSystemType ooActionSystemType, OoActionSystemType ooActionSystemType_2) |
| 587 |
{
|
| 588 |
// check if type 2 is a desc. of type 1
|
| 589 |
while (ooActionSystemType != ooActionSystemType_2 && ooActionSystemType_2.baseType() != null) // ref equ. |
| 590 |
ooActionSystemType_2 = ooActionSystemType_2.baseType(); |
| 591 |
|
| 592 |
return ooActionSystemType == ooActionSystemType_2; // ref equ. |
| 593 |
} |
| 594 |
} |