text: //===------------------------------------------------------------*- C++ -*-===//
  ///
  /// \file
  /// \brief 编译器预定义宏。
  ///
  /// \sa [Pre-defined Compiler Macros](https://sourceforge.net/p/predef/wiki)
  ///
  /// \version 2021-10-19
  /// \since 2017-12-13
  /// \authors zhengrr
  /// \copyright Unlicense
  ///
  //===----------------------------------------------------------------------===//
  
  #pragma once
  #ifndef RRCXX_CXX_VERSIONS_HXX_
  #define RRCXX_CXX_VERSIONS_HXX_
  
  #include "predef/compilers.hxx"
  #include "predef/features.hxx"
  #include "predef/standards.hxx"
  #include "predef/version_number.hxx"
  #include "predef/warning.hxx"
  
  #if !RRCXX_STANDARD_CXX98
  #error A C++ compiler is required.
  #endif
  
  #endif
  