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      1 /*
      2  * Copyright (C) 2008, 2010 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #if defined(__OBJC__)
     27 
     28 #define EMPTY_PROTOCOL(NAME) \
     29 @protocol NAME <NSObject> \
     30 @end
     31 
     32 #if defined(BUILDING_ON_TIGER) || defined(BUILDING_ON_LEOPARD)
     33 
     34 EMPTY_PROTOCOL(NSTableViewDataSource)
     35 EMPTY_PROTOCOL(NSTableViewDelegate)
     36 EMPTY_PROTOCOL(NSWindowDelegate)
     37 
     38 #endif
     39 
     40 #if defined(BUILDING_ON_TIGER) || defined(BUILDING_ON_LEOPARD) || defined(BUILDING_ON_SNOW_LEOPARD)
     41 
     42 EMPTY_PROTOCOL(NSURLConnectionDelegate)
     43 EMPTY_PROTOCOL(NSURLDownloadDelegate)
     44 
     45 #endif
     46 
     47 #undef EMPTY_PROTOCOL
     48 
     49 #endif /* defined(__OBJC__) */
     50