/usr/include/freefoam/OpenFOAM/StaticAssert.H is in libfreefoam-dev 0.1.0+dfsg-1build1.
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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::StaticAssertionFailed
Description
Macros and classes to provide static (compile-time) assertions.
Ideas from various sources
(http://www.ddj.com/cpp/184401547, http://www.boost.org)
\*---------------------------------------------------------------------------*/
#ifndef StaticAssert_H
#define StaticAssert_H
namespace Foam
{
//- Forward declaration of StaticAssertionFailed.
// Leave as an incomplete class so that sizeof(..) fails
template<bool Truth> class StaticAssertionFailed;
/*---------------------------------------------------------------------------*\
Class StaticAssertionFailed Declaration
\*---------------------------------------------------------------------------*/
//- Specialization for successful assertions
template<>
class StaticAssertionFailed<true>
{};
//- Helper class for handling static assertions
template<unsigned Test>
class StaticAssertionTest {};
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// internal use:
// ~~~~~~~~~~~~~
// paste together strings, even if an argument is itself a macro
#define StaticAssertMacro(X,Y) StaticAssertMacro1(X,Y)
#define StaticAssertMacro1(X,Y) StaticAssertMacro2(X,Y)
#define StaticAssertMacro2(X,Y) X##Y
// external use:
// ~~~~~~~~~~~~~
/**
* @def StaticAssert(Test)
* Assert that some test is true at compile-time
*/
#define StaticAssert(Test) \
typedef ::Foam::StaticAssertionTest \
< \
sizeof( ::Foam::StaticAssertionFailed< ((Test) ? true : false) > ) \
> StaticAssertMacro(StaticAssertionTest, __LINE__)
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************ vim: set sw=4 sts=4 et: ************************ //
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