d7111eb063
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@751 7ec92016-0320-0410-acc4-a06ded1c099a
45 lines
1.8 KiB
C++
45 lines
1.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// The Loki Library
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// Copyright (c) 2001 by Andrei Alexandrescu
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// This code accompanies the book:
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// Alexandrescu, Andrei. "Modern C++ Design: Generic Programming and Design
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// Patterns Applied". Copyright (c) 2001. Addison-Wesley.
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// permission notice appear in supporting documentation.
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// The author or Addison-Wesley Longman make no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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////////////////////////////////////////////////////////////////////////////////
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#ifndef LOKI_STATIC_CHECK_INC_
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#define LOKI_STATIC_CHECK_INC_
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// $Id$
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namespace Loki
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{
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////////////////////////////////////////////////////////////////////////////////
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// Helper structure for the STATIC_CHECK macro
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////////////////////////////////////////////////////////////////////////////////
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template<int> struct CompileTimeError;
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template<> struct CompileTimeError<true> {};
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}
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////////////////////////////////////////////////////////////////////////////////
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// macro STATIC_CHECK
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// Invocation: STATIC_CHECK(expr, id)
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// where:
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// expr is a compile-time integral or pointer expression
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// id is a C++ identifier that does not need to be defined
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// If expr is zero, id will appear in a compile-time error message.
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////////////////////////////////////////////////////////////////////////////////
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#define LOKI_STATIC_CHECK(expr, msg) \
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{ Loki::CompileTimeError<((expr) != 0)> ERROR_##msg; (void)ERROR_##msg; }
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#endif // end file guardian
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