org.logicng.datastructures.EncodingAuxiliaryVariable Maven / Gradle / Ivy
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// The Next Generation Logic Library //
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// Copyright 2015-20xx Christoph Zengler //
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// Licensed under the Apache License, Version 2.0 (the "License"); //
// you may not use this file except in compliance with the License. //
// You may obtain a copy of the License at //
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// http://www.apache.org/licenses/LICENSE-2.0 //
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// Unless required by applicable law or agreed to in writing, software //
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package org.logicng.datastructures;
import org.logicng.formulas.Literal;
import org.logicng.formulas.Variable;
/**
* An auxiliary variable for encoding results.
*
* This variable is used, if the result is added directly to a solver. In this case no variable on the factory has
* to be created.
* @version 1.3
* @since 1.1
*/
final class EncodingAuxiliaryVariable extends Variable {
final boolean negated;
/**
* Constructs a new auxiliary variable
* @param name the literal name
* @param negated {@code true} if the variables is negated, {@code false} otherwise
*/
EncodingAuxiliaryVariable(final String name, final boolean negated) {
super(name, null);
this.negated = negated;
}
@Override
public Literal negate() {
return new EncodingAuxiliaryVariable(this.name(), !this.negated);
}
@Override
public String toString() {
return name();
}
}