static-assert.h

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/*
 * Copyright (c) 2013 The University of Manchester
 *
 * 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
 *
 *     https://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 __STATIC_ASSERT_H__
#define __STATIC_ASSERT_H__
 
#ifdef __GNUC__
 
#define static_assert(predicate, msg) \
    _Static_assert(predicate, "msg")
 
#else
#define COMPILE_TIME_ASSERT(predicate, file) \
    _impl_CASSERT_LINE(predicate, __LINE__, file)
#define _impl_PASTE(a, b) a##b
#define _impl_CASSERT_LINE(predicate, line, file) \
  typedef char _impl_PASTE(assertion_failed_##file##_, line)[2*!!(predicate)-1];
#define static_assert(predicate, msg) \
    COMPILE_TIME_ASSERT(predicate, msg)
#endif
 
#endif  /*__STATIC_ASSERT_H__*/