vpx_ports/static_assert.h

   1 /*
   2  *  Copyright (c) 2020 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #ifndef VPX_VPX_PORTS_STATIC_ASSERT_H_
  12 #define VPX_VPX_PORTS_STATIC_ASSERT_H_
  13
  14 #if defined(_MSC_VER)
  15 #define VPX_STATIC_ASSERT(boolexp)              \
  16   do {                                          \
  17     char vpx_static_assert[(boolexp) ? 1 : -1]; \
  18     (void)vpx_static_assert;                    \
  19   } while (0)
  20 #else  // !_MSC_VER
  21 #define VPX_STATIC_ASSERT(boolexp)                         \
  22   do {                                                     \
  23     struct {                                               \
  24       unsigned int vpx_static_assert : (boolexp) ? 1 : -1; \
  25     } vpx_static_assert;                                   \
  26     (void)vpx_static_assert;                               \
  27   } while (0)
  28 #endif  // _MSC_VER
  29
  30 #endif  // VPX_VPX_PORTS_STATIC_ASSERT_H_