ShiftSignedLeft.java

package progen.kernel.functions;

import java.util.List;
import java.util.Map;

import progen.kernel.tree.Node;
import progen.userprogram.UserProgram;

/**
 * Clase que implementa el operador de desplazamiento de n bits a la izquierda.
 * 
 * @author jirsis
 * @since 2.0
 */
public class ShiftSignedLeft extends NonTerminal {

  private static final long serialVersionUID = 2910802850004403965L;

  public ShiftSignedLeft() {
    super("int$$int$$int", "<<");
  }

  @Override
  public Object evaluate(List<Node> arguments, UserProgram userProgram, Map<String, Object> returnAddr) {
    final Integer operador1 = (Integer) arguments.get(0).evaluate(userProgram, returnAddr);
    final Integer operador2 = (Integer) arguments.get(1).evaluate(userProgram, returnAddr);
    return operador1 << operador2;
  }

}