text: /*
   * Copyright (C) 2017 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
   */
  
  #pragma once
  
  /* BCOMPILER() - the compiler being used to build the project */
  #define BCOMPILER(BFEATURE) (defined BCOMPILER_##BFEATURE && BCOMPILER_##BFEATURE)
  
  /* BCOMPILER_HAS_CLANG_FEATURE() - whether the compiler supports a particular language or library feature. */
  /* http://clang.llvm.org/docs/LanguageExtensions.html#has-feature-and-has-extension */
  #ifdef __has_feature
  #define BCOMPILER_HAS_CLANG_FEATURE(x) __has_feature(x)
  #else
  #define BCOMPILER_HAS_CLANG_FEATURE(x) 0
  #endif
  
  #define BASAN_ENABLED BCOMPILER_HAS_CLANG_FEATURE(address_sanitizer)
  
  /* BCOMPILER_HAS_CLANG_DECLSPEC() - whether the compiler supports a Microsoft style __declspec attribute. */
  /* https://clang.llvm.org/docs/LanguageExtensions.html#has-declspec-attribute */
  #ifdef __has_declspec_attribute
  #define BCOMPILER_HAS_CLANG_DECLSPEC(x) __has_declspec_attribute(x)
  #else
  #define BCOMPILER_HAS_CLANG_DECLSPEC(x) 0
  #endif
  
  /* BCOMPILER(GCC_COMPATIBLE) - GNU Compiler Collection or compatibles */
  
  #if defined(__GNUC__)
  #define BCOMPILER_GCC_COMPATIBLE 1
  #endif
  
  /* BNO_RETURN */
  
  #if !defined(BNO_RETURN) && BCOMPILER(GCC_COMPATIBLE)
  #define BNO_RETURN __attribute((__noreturn__))
  #endif
  
  #if !defined(BNO_RETURN)
  #define BNO_RETURN
  #endif
  
  /* BFALLTHROUGH */
  
  #if !defined(BFALLTHROUGH) && defined(__cplusplus) && defined(__has_cpp_attribute)
  
  #if __has_cpp_attribute(fallthrough)
  #define BFALLTHROUGH [[fallthrough]]
  #elif __has_cpp_attribute(clang::fallthrough)
  #define BFALLTHROUGH [[clang::fallthrough]]
  #elif __has_cpp_attribute(gnu::fallthrough)
  #define BFALLTHROUGH [[gnu::fallthrough]]
  #endif
  
  #endif // !defined(BFALLTHROUGH) && defined(__cplusplus) && defined(__has_cpp_attribute)
  
  #if !defined(BFALLTHROUGH)
  #define BFALLTHROUGH
  #endif
  