text: // Copyright 2014 Renato Tegon Forti, Antony Polukhin.
  // Copyright 2015-2019 Antony Polukhin.
  //
  // Distributed under the Boost Software License, Version 1.0.
  // (See accompanying file LICENSE_1_0.txt
  // or copy at http://www.boost.org/LICENSE_1_0.txt)
  
  #ifndef BOOST_STACKTRACE_DETAIL_VOID_PTR_CAST_HPP
  #define BOOST_STACKTRACE_DETAIL_VOID_PTR_CAST_HPP
  
  #include <boost/config.hpp>
  #ifdef BOOST_HAS_PRAGMA_ONCE
  #   pragma once
  #endif
  
  #include <boost/static_assert.hpp>
  #include <boost/type_traits/is_pointer.hpp>
  
  #if defined(__GNUC__) && defined(__GNUC_MINOR__) && (__GNUC__ * 100 + __GNUC_MINOR__ > 301)
  #   pragma GCC system_header
  #endif
  
  namespace boost { namespace stacktrace { namespace detail {
  
  // GCC warns when reinterpret_cast between function pointer and object pointer occur.
  // This functionsuppress the warnings and ensures that such casts are safe.
  template <class To, class From>
  To void_ptr_cast(From* v) BOOST_NOEXCEPT {
      BOOST_STATIC_ASSERT_MSG(
          boost::is_pointer<To>::value,
          "`void_ptr_cast` function must be used only for casting to or from void pointers."
      );
  
      BOOST_STATIC_ASSERT_MSG(
          sizeof(From*) == sizeof(To),
          "Pointer to function and pointer to object differ in size on your platform."
      );
  
      return reinterpret_cast<To>(v);
  }
  
  
  }}} // boost::stacktrace::detail
  
  #endif // BOOST_STACKTRACE_DETAIL_VOID_PTR_CAST_HPP
  
  