/usr/include/ITK-4.10/itkStaticAssert.h is in libinsighttoolkit4-dev 4.10.1-dfsg1-1.1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkStaticAssert_h
#define itkStaticAssert_h
#include "itkMacro.h"
#if defined(ITK_HAS_CXX11_STATIC_ASSERT)
// Use the C++11 static_assert if available
/** Static assertion.
* This macro will either emulate static assertions on the current compiler or
* use C++11 \c static_assert() keyword.
* \param expr compile-time expression to check
* \param str string literal that will appear (C++11, GCC 4.3+) as compiler
* error if \c expr is \c false.
* \ingroup ITKCommon
*/
# define itkStaticAssert(expr, str) static_assert(expr, str)
#elif defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__ ) >= 403 && !defined(__clang__) && !defined( __INTEL_COMPILER )
// GCC 4.3 is enough for this trick
// But it restricts the static assertion to non global contexts (-> functions)
# define itkStaticAssert(expr,str) \
({extern int __attribute__((error(str))) StaticAssertFailure(); \
((void)((expr) ? 0: StaticAssertFailure()), 0); \
})
#else
// Usual trick (boost, clang, ...), but it will loose the error message on the
// way
# define ITK_JOIN(X,Y) ITK_DO_JOIN(X,Y)
# define ITK_DO_JOIN(X,Y) ITK_DO_JOIN2(X,Y)
# define ITK_DO_JOIN2(X,Y) X##Y
namespace itk {
/// \cond HIDE_META_PROGRAMMING
/** Internal class to emulate static assertions of pre-C++11 compilers.
* \sa \c itkStaticAssert
* \ingroup ITKCommon
*/
template <bool V> struct StaticAssertFailure;
template <> struct StaticAssertFailure<true>{};
/// \endcond
} // itk namespace
# define itkStaticAssert(expr,str) \
enum { ITK_JOIN(static_assert_typedef, __LINE__) = sizeof(itk::StaticAssertFailure<((expr) == 0 ? false : true)>) };
#endif
#endif // itkStaticAssert_h
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