/*
* Redberry: symbolic tensor computations.
*
* Copyright (c) 2010-2013:
* Stanislav Poslavsky <stvlpos@mail.ru>
* Bolotin Dmitriy <bolotin.dmitriy@gmail.com>
*
* This file is part of Redberry.
*
* Redberry is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Redberry 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Redberry. If not, see <http://www.gnu.org/licenses/>.
*/
package cc.redberry.core.parser;
import cc.redberry.core.number.Complex;
import cc.redberry.core.number.parser.NumberParser;
/**
* Parser for numbers.
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
* @since 1.0
*/
public class ParserNumber implements TokenParser {
/**
* Singleton instance.
*/
public static final ParserNumber INSTANCE = new ParserNumber();
private ParserNumber() {
}
@Override
public ParseToken parseToken(String expression, cc.redberry.core.parser.Parser parser) {
Complex value;
try {
value = NumberParser.COMPLEX_PARSER.parse(expression);
} catch (NumberFormatException e) {
return null;
}
return new ParseTokenNumber(value);
}
@Override
public int priority() {
return 9999;
}
}