org.unlaxer.tinyexpression.parser.NakedVariableParser Maven / Gradle / Ivy

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package org.unlaxer.tinyexpression.parser;

import java.util.Optional;

import org.unlaxer.Name;
import org.unlaxer.parser.Parser;
import org.unlaxer.parser.Parsers;
import org.unlaxer.parser.clang.IdentifierParser;
import org.unlaxer.parser.combinator.LazyChain;
import org.unlaxer.util.cache.SupplierBoundCache;

public class NakedVariableParser extends LazyChain implements VariableParser{//implements Expression , BooleanExpression , StringExpression{

	private static final long serialVersionUID = -8533685205048474333L;
	
  static final SupplierBoundCache SINGLETON = new SupplierBoundCache<>(NakedVariableParser::new);


	public NakedVariableParser() {
		super();
	}

	public NakedVariableParser(Name name) {
		super(name);
	}
	
	@Override
	public org.unlaxer.parser.Parsers getLazyParsers() {
	  
	  return 
      new Parsers(
        Parser.get(DollarParser.class),
        Parser.newInstance(IdentifierParser.class).addTag(variableNameTag)
      );
	}

  @Override
  public Optional typeAsOptional() {
    return Optional.empty();
  }
  
  public static NakedVariableParser get() {
    
    return SINGLETON.get();
  }
}