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

import net.sourceforge.phpdt.internal.compiler.ast.declarations.VariableUsage;

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

/**
 * 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 ...)
   * @return the variables from outside
   */
  public List getOutsideVariable() {
    return new ArrayList();
  }

  /**
   * get the modified variables.
   * @return the variables modified
   */
  public List getModifiedVariable() {
    return expression.getModifiedVariable();
  }

  /**
   * Get the variables used.
   * @return the variables used
   */
  public List getUsedVariable() {
    return expression.getUsedVariable();
  }
}