org.unlaxer.sample.calc.parser2.FormulaParser Maven / Gradle / Ivy

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a simple parser combinator inspired by RelaxNG

There is a newer version: 1.1.26

package org.unlaxer.sample.calc.parser2;


import org.unlaxer.Parsed;
import org.unlaxer.TokenKind;
import org.unlaxer.Parsed.Status;
import org.unlaxer.context.ParseContext;
import org.unlaxer.parser.Parser;
import org.unlaxer.parser.combinator.NoneChildParser;

public class FormulaParser extends NoneChildParser implements Parser{
	
	private static final long serialVersionUID = 3153269372878531517L;

	public static final FormulaParser SINGLETON = new FormulaParser();
	
	final public ExpressionParser expressionParser;

	public FormulaParser() {
		super();
		expressionParser = new ExpressionParser();
	}

	@Override
	public Parsed parse(ParseContext parseContext, TokenKind tokenKind, boolean invertMatch) {
		Parsed parsed = expressionParser.parse(parseContext);
		if(false == parsed.isSucceeded() || parseContext.allConsumed()){
			return parsed;
		}
		return new Parsed(parsed.getRootToken(),Status.failed);
	}

	@Override
	public Parser createParser() {
		return this;
	}
}