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/*
* Copyright 2011-2016 Blender Foundation
*
* 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
*
* 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 __UTIL_STATIC_ASSERT_H__
#define __UTIL_STATIC_ASSERT_H__
CCL_NAMESPACE_BEGIN
/* TODO(sergey): In theory CUDA might work with own static assert
* implementation since it's just pure C++.
*/
#ifndef __KERNEL_GPU__
# if (__cplusplus > 199711L) || (defined(_MSC_VER) && _MSC_VER >= 1800)
/* C++11 has built-in static_assert() */
# elif defined(static_assert)
/* Some platforms might have static_assert() defined even tho their
* C++ support wouldn't be declared to be C++11.
*/
# else /* C++11 or MSVC2015 */
template <bool Test> class StaticAssertFailure;
template <> class StaticAssertFailure<true> {};
# define _static_assert_private_glue_impl(A, B) A ## B
# define _static_assert_glue(A, B) _static_assert_private_glue_impl(A, B)
# ifdef __COUNTER__
# define static_assert(condition, message) \
enum {_static_assert_glue(q_static_assert_result, __COUNTER__) = sizeof(StaticAssertFailure<!!(condition)>)} // NOLINT
# else /* __COUNTER__ */
# define static_assert(condition, message) \
enum {_static_assert_glue(q_static_assert_result, __LINE__) = sizeof(StaticAssertFailure<!!(condition)>)} // NOLINT
# endif /* __COUNTER__ */
# endif /* C++11 or MSVC2015 */
#else /* __KERNEL_GPU__ */
# ifndef static_assert
# define static_assert(statement, message)
# endif
#endif /* __KERNEL_GPU__ */
/* TODO(sergey): For until C++11 is a bare minimum for us,
* we do a bit of a trickery to show meaningful message so
* it's more or less clear what's wrong when building without
* C++11.
*
* The thing here is: our non-C++11 implementation doesn't
* have a way to print any message after preprocessor
* substitution so we rely on the message which is passed to
* static_assert() since that's the only message visible when
* compilation fails.
*
* After C++11 bump it should be possible to glue structure
* name to the error message,
*/
# define static_assert_align(st, align) \
static_assert((sizeof(st) % (align) == 0), "Structure must be strictly aligned") // NOLINT
CCL_NAMESPACE_END
#endif /* __UTIL_STATIC_ASSERT_H__ */
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