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

import java.util.List;

/**
 * A return statement.
 * @author Matthieu Casanova
 */
public class ReturnStatement extends Statement {

  public Expression expression;

  public ReturnStatement(final Expression expression, final int sourceStart, final int sourceEnd) {
    super(sourceStart, sourceEnd);
    this.expression = expression;
  }

  public String toString(final int tab) {
    final String s = tabString(tab);
    if (expression == null) {
      return s + "return";//$NON-NLS-1$
    }
    return s + "return " + expression.toStringExpression();//$NON-NLS-1$
  }

    /**
   * Get the variables from outside (parameters, globals ...)
   */
  public void getOutsideVariable(final List list) {
  }

  /**
   * get the modified variables.
   */
  public void getModifiedVariable(final List list) {
    if (expression != null) {
      expression.getModifiedVariable(list);
    }
  }

  /**
   * Get the variables used.
   */
  public void getUsedVariable(final List list) {
    if (expression != null) {
        expression.getUsedVariable(list);
    }
  }
}