/*******************************************************************************
* Copyright (c) 2009-2013 CWI
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*
* * Anya Helene Bagge - anya@ii.uib.no
* * Jurgen J. Vinju - Jurgen.Vinju@cwi.nl - CWI
* * Tijs van der Storm - Tijs.van.der.Storm@cwi.nl
* * Paul Klint - Paul.Klint@cwi.nl - CWI
* * Arnold Lankamp - Arnold.Lankamp@cwi.nl
*******************************************************************************/
package org.rascalmpl.interpreter.result;
import static org.rascalmpl.interpreter.result.ResultFactory.bool;
import static org.rascalmpl.interpreter.result.ResultFactory.makeResult;
import org.eclipse.imp.pdb.facts.IBool;
import org.eclipse.imp.pdb.facts.IListWriter;
import org.eclipse.imp.pdb.facts.INumber;
import org.eclipse.imp.pdb.facts.IRational;
import org.eclipse.imp.pdb.facts.IReal;
import org.eclipse.imp.pdb.facts.IValue;
import org.eclipse.imp.pdb.facts.IValueFactory;
import org.eclipse.imp.pdb.facts.type.Type;
import org.eclipse.imp.pdb.facts.type.TypeFactory;
import org.rascalmpl.interpreter.IEvaluatorContext;
import org.rascalmpl.interpreter.control_exceptions.InterruptException;
import org.rascalmpl.interpreter.staticErrors.UnexpectedType;
import org.rascalmpl.interpreter.utils.RuntimeExceptionFactory;
public class RationalResult extends ElementResult<IRational> {
public RationalResult(Type type, IRational n, IEvaluatorContext ctx) {
super(type, n, ctx);
}
@Override
public <U extends IValue, V extends IValue> Result<U> add(Result<V> result) {
return result.addRational(this);
}
@Override
public <U extends IValue, V extends IValue> Result<U> multiply(Result<V> result) {
return result.multiplyRational(this);
}
@Override
public <U extends IValue, V extends IValue> Result<U> subtract(Result<V> result) {
return result.subtractRational(this);
}
@Override
public <U extends IValue, V extends IValue> Result<U> divide(Result<V> result) {
return result.divideRational(this);
}
@Override
public <U extends IValue, V extends IValue> Result<U> makeRange(Result<V> that) {
return that.makeRangeFromRational(this);
}
@Override
public <U extends IValue, V extends IValue, W extends IValue> Result<U> makeStepRange(Result<V> to, Result<W> step) {
return to.makeStepRangeFromRational(this, step);
}
@Override
public <V extends IValue> Result<IBool> equals(Result<V> that) {
return that.equalToRational(this);
}
@Override
public <V extends IValue> Result<IBool> nonEquals(Result<V> that) {
return that.nonEqualToRational(this);
}
@Override
public <V extends IValue> LessThanOrEqualResult lessThanOrEqual(Result<V> result) {
return result.lessThanOrEqualRational(this);
}
/// real impls start here
@Override
public <U extends IValue> Result<U> negative() {
return makeResult(type, getValue().negate(), ctx);
}
@Override
protected <U extends IValue> Result<U> addRational(RationalResult n) {
return makeResult(type, getValue().add(n.getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> subtractRational(RationalResult n) {
// Note the reverse subtraction
return makeResult(type, n.getValue().subtract(getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> multiplyRational(RationalResult n) {
return makeResult(type, getValue().multiply(n.getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> divideRational(RationalResult n) {
try {
// note the reverse division.
return makeResult(type, n.getValue().divide(getValue()), ctx);
} catch (ArithmeticException ae) {
throw RuntimeExceptionFactory.arithmeticException(ae.getMessage(), this.ctx.getCurrentAST(), null);
}
}
@Override
protected <U extends IValue> Result<U> addInteger(IntegerResult n) {
return makeResult(type, getValue().toRational().add(n.getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> subtractInteger(IntegerResult n) {
// Note the reverse subtraction
return makeResult(type, n.getValue().toRational().subtract(getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> multiplyInteger(IntegerResult n) {
return makeResult(type, getValue().toRational().multiply(n.getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> divideInteger(IntegerResult n) {
try {
// note the reverse division.
return makeResult(type, n.getValue().toRational().divide(getValue()), ctx);
} catch (ArithmeticException ae) {
throw RuntimeExceptionFactory.arithmeticException(ae.getMessage(), this.ctx.getCurrentAST(), null);
}
}
@Override
protected <U extends IValue> Result<U> addReal(ElementResult<IReal> n) {
return n.addRational(this);
}
@Override
protected <U extends IValue> Result<U> multiplyReal(ElementResult<IReal> n) {
return n.multiplyRational(this);
}
@Override
protected <U extends IValue> Result<U> subtractReal(ElementResult<IReal> n) {
return widenToReal().subtractReal(n);
}
@Override
protected <U extends IValue> Result<U> divideReal(ElementResult<IReal> n) {
return widenToReal().divideReal(n);
}
@Override
protected <U extends IValue> Result<U> makeRangeFromRational(RationalResult from) {
// this = to
return makeRangeWithDefaultStep(from);
}
private <U extends IValue, V extends INumber> Result<U> makeRangeWithDefaultStep(Result<V> from) {
if (from.getValue().less(getValue()).getValue()) {
return makeStepRangeFromToWithSecond(from, this, makeResult(from.getType(),
from.getValue().add(getValueFactory().rational(1,1)), ctx), getValueFactory(), getTypeFactory(), ctx);
}
return makeStepRangeFromToWithSecond(from, this, makeResult(from.getType(),
from.getValue().subtract(getValueFactory().integer(1)), ctx), getValueFactory(), getTypeFactory(), ctx);
}
@Override
protected <U extends IValue, V extends IValue> Result<U> makeStepRangeFromRational(RationalResult from, Result<V> second) {
return makeStepRangeFromToWithSecond(from, this, second, getValueFactory(), getTypeFactory(), ctx);
}
@Override
protected <U extends IValue> Result<U> makeRangeFromReal(ElementResult<IReal> from) {
return makeRangeWithDefaultStep(from);
}
@Override
protected <U extends IValue> Result<U> makeRangeFromInteger(IntegerResult from) {
return makeRangeWithDefaultStep(from);
}
@Override
protected <U extends IValue, V extends IValue> Result<U> makeStepRangeFromReal(ElementResult<IReal> from, Result<V> second) {
return makeStepRangeFromToWithSecond(from, this, second, getValueFactory(), getTypeFactory(), ctx);
}
@Override
protected <U extends IValue> Result<U> makeRangeFromNumber(NumberResult from) {
return makeRangeWithDefaultStep(from);
}
@Override
protected <U extends IValue, V extends IValue> Result<U> makeStepRangeFromNumber(NumberResult from, Result<V> second) {
return makeStepRangeFromToWithSecond(from, this, second, getValueFactory(), getTypeFactory(), ctx);
}
public static <U extends IValue, V extends INumber, W extends INumber, X extends IValue> Result<U>
makeStepRangeFromToWithSecond(
Result<V> from,
Result<W> to,
Result<X> second,
IValueFactory vf,
TypeFactory tf,
IEvaluatorContext ctx) {
INumber iFrom = from.getValue();
INumber iTo = to.getValue();
// I still think it is ugly to do it here...
if (!second.getType().isSubtypeOf(tf.numberType())) {
throw new UnexpectedType(tf.numberType(), second.getType(), ctx.getCurrentAST());
}
INumber iSecond = (INumber) second.getValue();
INumber diff = iSecond.subtract(iFrom);
INumber zero = diff.subtract(diff); // zero in the type that we're dealing with.
// Use declared types here
Type resultType = second.getType().lub(from.getType().lub(to.getType()));
IListWriter w = vf.listWriter();
if (iFrom.lessEqual(iTo).getValue() && diff.greater(zero).getValue()) {
do {
w.append(iFrom);
iFrom = iFrom.add(diff);
if (ctx.isInterrupted()) throw new InterruptException(ctx.getStackTrace(), ctx.getCurrentAST().getLocation());
} while (iFrom.lessEqual(iTo).getValue());
}
else if (iFrom.greaterEqual(iTo).getValue() && diff.less(zero).getValue()) {
do {
w.append(iFrom);
iFrom = iFrom.add(diff);
} while (iFrom.greaterEqual(iTo).getValue());
}
return makeResult(tf.listType(resultType), w.done(), ctx);
}
@Override
protected <U extends IValue> Result<U> addListRelation(ListRelationResult that) {
return that.addRational(this);
}
@Override
protected <U extends IValue> Result<U> addRelation(RelationResult that) {
return that.addRational(this);
}
@Override
protected Result<IBool> equalToRational(RationalResult that) {
return bool(that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected Result<IBool> equalToInteger(IntegerResult that) {
return bool(that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected Result<IBool> nonEqualToRational(RationalResult that) {
return bool(!that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected Result<IBool> nonEqualToReal(RealResult that) {
return bool(!that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected LessThanOrEqualResult lessThanOrEqualRational(RationalResult that) {
return new LessThanOrEqualResult(that.getValue().less(getValue()).getValue(), that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected LessThanOrEqualResult lessThanOrEqualInteger(IntegerResult that) {
return new LessThanOrEqualResult(that.getValue().less(getValue()).getValue(), that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected Result<IBool> lessThanInteger(IntegerResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().less(getValue()), ctx);
}
@Override
protected Result<IBool> lessThanNumber(NumberResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().less(getValue()), ctx);
}
@Override
protected Result<IBool> lessThanReal(RealResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().less(getValue()), ctx);
}
@Override
protected Result<IBool> lessThanRational(RationalResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().less(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanNumber(NumberResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greater(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanInteger(IntegerResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greater(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanOrEqualInteger(IntegerResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greaterEqual(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanOrEqualNumber(NumberResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greaterEqual(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanOrEqualRational(RationalResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greaterEqual(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanOrEqualReal(ElementResult<IReal> that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greaterEqual(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanRational(RationalResult that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greater(getValue()), ctx);
}
@Override
protected Result<IBool> greaterThanReal(ElementResult<IReal> that) {
return makeResult(getTypeFactory().boolType(), that.getValue().greater(getValue()), ctx);
}
@Override
protected Result<IBool> equalToReal(RealResult that) {
return bool(that.getValue().compare(getValue()) == 0, ctx);
}
@Override
protected LessThanOrEqualResult lessThanOrEqualReal(ElementResult<IReal> that) {
return new LessThanOrEqualResult(that.getValue().less(getValue()).getValue(), that.getValue().equal(getValue()).getValue(), ctx);
}
<U extends IValue> Result<U> widenToReal() {
return makeResult(getTypeFactory().realType(), getValue().toReal(), ctx);
}
@Override
protected <U extends IValue> Result<U> addNumber(NumberResult n) {
return makeResult(type, getValue().add(n.getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> subtractNumber(NumberResult n) {
// note the reverse subtraction.
return makeResult(type, n.getValue().subtract(getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> multiplyNumber(NumberResult n) {
return makeResult(type, getValue().multiply(n.getValue()), ctx);
}
@Override
protected <U extends IValue> Result<U> divideNumber(NumberResult n) {
try {
// note the reverse division
return makeResult(n.getType(), n.getValue().divide(getValue(), getValueFactory().getPrecision()), ctx);
} catch (ArithmeticException ae) {
throw RuntimeExceptionFactory.arithmeticException(ae.getMessage(), this.ctx.getCurrentAST(), null);
}
}
@Override
protected Result<IBool> equalToNumber(NumberResult that) {
return bool(that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected Result<IBool> nonEqualToNumber(NumberResult that) {
return bool(!that.getValue().equal(getValue()).getValue(), ctx);
}
@Override
protected LessThanOrEqualResult lessThanOrEqualNumber(NumberResult that) {
return new LessThanOrEqualResult(that.getValue().less(getValue()).getValue(), that.getValue().equal(getValue()).getValue(), ctx);
}
}