text: //===--- DemangleConfig.h ---------------------------------------*- C++ -*-===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  //
  // This file contains a variety of feature test macros copied from
  // include/llvm/Support/Compiler.h so that LLVMDemangle does not need to take
  // a dependency on LLVMSupport.
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef LLVM_DEMANGLE_COMPILER_H
  #define LLVM_DEMANGLE_COMPILER_H
  
  #ifndef __has_feature
  #define __has_feature(x) 0
  #endif
  
  #ifndef __has_cpp_attribute
  #define __has_cpp_attribute(x) 0
  #endif
  
  #ifndef __has_attribute
  #define __has_attribute(x) 0
  #endif
  
  #ifndef __has_builtin
  #define __has_builtin(x) 0
  #endif
  
  #ifndef DEMANGLE_GNUC_PREREQ
  #if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
  #define DEMANGLE_GNUC_PREREQ(maj, min, patch)                           \
    ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >=          \
     ((maj) << 20) + ((min) << 10) + (patch))
  #elif defined(__GNUC__) && defined(__GNUC_MINOR__)
  #define DEMANGLE_GNUC_PREREQ(maj, min, patch)                           \
    ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
  #else
  #define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0
  #endif
  #endif
  
  #if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0)
  #define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__))
  #else
  #define DEMANGLE_ATTRIBUTE_USED
  #endif
  
  #if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0)
  #define DEMANGLE_UNREACHABLE __builtin_unreachable()
  #elif defined(_MSC_VER)
  #define DEMANGLE_UNREACHABLE __assume(false)
  #else
  #define DEMANGLE_UNREACHABLE
  #endif
  
  #if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0)
  #define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline))
  #elif defined(_MSC_VER)
  #define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
  #else
  #define DEMANGLE_ATTRIBUTE_NOINLINE
  #endif
  
  #if !defined(NDEBUG)
  #define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED
  #else
  #define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE
  #endif
  
  #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
  #define DEMANGLE_FALLTHROUGH [[fallthrough]]
  #elif __has_cpp_attribute(gnu::fallthrough)
  #define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]]
  #elif !__cplusplus
  // Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
  // error when __has_cpp_attribute is given a scoped attribute in C mode.
  #define DEMANGLE_FALLTHROUGH
  #elif __has_cpp_attribute(clang::fallthrough)
  #define DEMANGLE_FALLTHROUGH [[clang::fallthrough]]
  #else
  #define DEMANGLE_FALLTHROUGH
  #endif
  
  #define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle {
  #define DEMANGLE_NAMESPACE_END } }
  
  #endif
  