package net.sourceforge.phpdt.internal.compiler.ast;

import java.util.List;
import java.util.ArrayList;

/**
 * Here is the Superclass of the Literal expressions.
 * @author Matthieu Casanova
 */
public abstract class Literal extends Expression {

  /**
   * Create a Literal.
   * @param sourceStart starting offset
   * @param sourceEnd ending offset
   */
  public Literal(final int sourceStart, final int sourceEnd) {
    super(sourceStart, sourceEnd);
  }

  /**
   * Get the variables from outside (parameters, globals ...)
   * @return an empty list
   */
  public List getOutsideVariable() {
    return new ArrayList(1);
  }

  /**
   * get the modified variables.
   * @return an empty list
   */
  public List getModifiedVariable() {
    return new ArrayList(1);
  }

  /**
   * Get the variables used.
   * @return an empty list
   */
  public List getUsedVariable() {
    return new ArrayList(1);
  }
}