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

import java.util.List;

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

  protected Literal(Type type, int sourceStart, int sourceEnd, int beginLine, int endLine, int beginColumn, int endColumn) {
    super(type, sourceStart, sourceEnd, beginLine, endLine, beginColumn, endColumn);
  }

  /**
   * Get the variables from outside (parameters, globals ...)
   *
   * @param list the list where we will put variables
   */
  public final void getOutsideVariable(List list) {}

  /**
   * get the modified variables.
   *
   * @param list the list where we will put variables
   */
  public final void getModifiedVariable(List list) {}

  /**
   * Get the variables used.
   *
   * @param list the list where we will put variables
   */
  public void getUsedVariable(List list) {}

  public Expression expressionAt(int line, int column) {
    return isAt(line, column) ? this : null;
  }
}