public ForStatement(List<DeclarationStatement> declarations,

      Expression condition, Expression post, Statement body) {

    super(ExpressionType.For, Void.TYPE);

    assert declarations != null;

    assert body != null;

    this.declarations = declarations; // may be empty, not null

    this.condition = condition; // may be null

    this.post = post; // may be null

    this.body = body; // may be empty block, not null

  }



  @Override public ForStatement accept(Visitor visitor) {

    visitor = visitor.preVisit(this);

    List<DeclarationStatement> decls1 =

        Expressions.acceptDeclarations(declarations, visitor);

    final Expression condition1 =

        condition == null ? null : condition.accept(visitor);

    final Expression post1 = post == null ? null : post.accept(visitor);

    final Statement body1 = body.accept(visitor);

    return visitor.visit(this, decls1, condition1, post1, body1);

  }