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1   ////////////////////////////////////////////////////////////////////////////////
2   // MillScript: an Open Spice interpreter and batch website creation tool
3   // Copyright (C) 2001-2004 Open World Ltd
4   //
5   // This file is part of MillScript.
6   //
7   // MillScript is free software; you can redistribute it and/or modify it under
8   // the terms of the GNU General Public License as published by the Free
9   // Software Foundation; either version 2 of the License, or (at your option)
10  // any later version.
11  //
12  // MillScript is distributed in the hope that it will be useful, but WITHOUT
13  // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  // more details.
16  //
17  // You should have received a copy of the GNU General Public License along with
18  // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19  // Place, Suite 330, Boston, MA  02111-1307  USA
20  ////////////////////////////////////////////////////////////////////////////////
21  package org.millscript.millscript.action;
22  
23  import org.millscript.millscript.vm.Machine;
24  
25  /**
26   * This class represents the action for a comma expression. More specifically
27   * this is used anywhere in MillScript where a sequence of actions must be
28   * performed, kind of like a very specific linked list of actions.
29   *
30   * @see org.millscript.millscript.expr.CommaExpr
31   * @see org.millscript.millscript.syntax.CommaSyntax
32   */
33  public final class CommaAction extends Action {
34  
35      /**
36       * The action for the left hand side of the comma expression, or the first
37       * action to be performed.
38       */
39      private Action lhs;
40  
41      /**
42       * The action for the right hand side of the comma expression, or the
43       * second action to be performed.
44       */
45      private Action rhs;
46  
47      /**
48       * Constructs a new comma action to perform the specified left and right
49       * hand actions in sequence.
50       *
51       * @param l the left hand, or first, action
52       * @param r the right hand, or second, action
53       */
54      public CommaAction( final Action l, final Action r ) {
55          this.lhs = l;
56          this.rhs = r;
57      }
58  
59      /**
60       * @see org.millscript.millscript.action.Action#action(org.millscript.millscript.vm.Machine)
61       */
62      @Override
63      public void action( final Machine mc ) {
64          lhs.act( mc );
65          rhs.act( mc );
66      }
67  
68  }