org.unlaxer.vocabulary.ebnf.informally.RepeatedSequence Maven / Gradle / Ivy

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package org.unlaxer.vocabulary.ebnf.informally;

import java.util.List;

import org.unlaxer.Name;
import org.unlaxer.parser.ChainParsers;
import org.unlaxer.parser.Parser;
import org.unlaxer.parser.combinator.LazyChain;
import org.unlaxer.parser.elementary.MappedSingleCharacterParser;
import org.unlaxer.parser.elementary.SpaceDelimitor;

/**
 * https://www.cl.cam.ac.uk/~mgk25/iso-14977.pdf
 *
 * (* The brackets  {  and  }  enclose symbols
 *   which may be repeated any number of times  *);
 *
 * repeated sequence = ’{’, definitions list, ’}’
 *   
 */
public class RepeatedSequence extends LazyChain{

	private static final long serialVersionUID = 6579390369931190881L;

	public RepeatedSequence() {
		super();
	}

	public RepeatedSequence(Name name) {
		super(name);
	}

	@Override
	public List getLazyParsers() {
		return new ChainParsers(
			new MappedSingleCharacterParser('{'),
			new SpaceDelimitor(),
			new DefinitionsList(),
			new SpaceDelimitor(),
			new MappedSingleCharacterParser('}')
		);
	}
}