/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.internal.expression.parser;
import com.sk89q.worldedit.internal.expression.Expression;
import com.sk89q.worldedit.internal.expression.runtime.EvaluationException;
import com.sk89q.worldedit.internal.expression.runtime.LValue;
import com.sk89q.worldedit.internal.expression.runtime.RValue;
public class UnboundVariable extends PseudoToken implements LValue {
public final String name;
public UnboundVariable(int position, String name) {
super(position);
this.name = name;
}
@Override
public char id() {
return 'V';
}
@Override
public String toString() {
return "UnboundVariable(" + name + ")";
}
@Override
public double getValue() throws EvaluationException {
throw new EvaluationException(getPosition(), "Tried to evaluate unbound variable!");
}
@Override
public LValue optimize() throws EvaluationException {
throw new EvaluationException(getPosition(), "Tried to optimize unbound variable!");
}
@Override
public double assign(double value) throws EvaluationException {
throw new EvaluationException(getPosition(), "Tried to assign unbound variable!");
}
public RValue bind(Expression expression, boolean isLValue) throws ParserException {
final RValue variable = expression.getVariable(name, isLValue);
if (variable == null) {
throw new ParserException(getPosition(), "Variable '" + name + "' not found");
}
return variable;
}
@Override
public LValue bindVariables(Expression expression, boolean preferLValue) throws ParserException {
final RValue variable = expression.getVariable(name, preferLValue);
if (variable == null) {
throw new ParserException(getPosition(), "Variable '" + name + "' not found");
}
return (LValue) variable;
}
}