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package org.unlaxer.tinyexpression.parser;

import java.util.Optional;

import org.unlaxer.parser.Parser;
import org.unlaxer.parser.Parsers;
import org.unlaxer.tinyexpression.parser.javalang.JavaStyleDelimitedLazyChain;
import org.unlaxer.util.cache.SupplierBoundCache;

public class BooleanPrefixedVariableParser extends JavaStyleDelimitedLazyChain implements BooleanExpression , VariableParser {

  private static final long serialVersionUID = -600588538210309122L;
  
  static final SupplierBoundCache SINGLETON = new SupplierBoundCache<>(BooleanPrefixedVariableParser::new);

  public BooleanPrefixedVariableParser() {
    super();
  }
  
  @Override
  public org.unlaxer.parser.Parsers getLazyParsers() {
    return 
    new Parsers(//
        Parser.get(BooleanTypeHintPrefixParser.class), //0
        Parser.get(NakedVariableParser.class)//1
    );
  }
  
  @Override
  public Optional typeAsOptional() {
    return Optional.of(ExpressionTypes._boolean);
  }
  
  public static BooleanPrefixedVariableParser get() {
    return SINGLETON.get();
  }

}