d2ca522cca
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@1115 7ec92016-0320-0410-acc4-a06ded1c099a
59 lines
2.5 KiB
C++
59 lines
2.5 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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// Code covered by the MIT License
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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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 LOKI_STATIC_CHECK
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// Invocation: LOKI_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_CONCAT( X, Y ) LOKI_CONCAT_SUB( X, Y )
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#define LOKI_CONCAT_SUB( X, Y ) X##Y
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#define LOKI_STATIC_CHECK(expr, msg) enum { LOKI_CONCAT(ERROR_##msg, __LINE__) = sizeof(Loki::CompileTimeError<expr != 0 >) }
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#endif // end file guardian
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