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// file      : butl/ft/exception -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license   : MIT; see accompanying LICENSE file

#ifndef BUTL_FT_EXCEPTION
#define BUTL_FT_EXCEPTION

#include <cstddef>   // _LIBCPP_VERSION
#include <exception>

// __cpp_lib_uncaught_exceptions
//
#ifndef __cpp_lib_uncaught_exceptions
   //
   // VC has it since 1900.
   //
#  if defined(_MSC_VER)
#    if _MSC_VER >= 1900
#      define __cpp_lib_uncaught_exceptions 201411
#    endif
   //
   // Clang's libc++ seems to have it for a while (but not before 1200) so we
   // assume it's there from 1200. But not for MacOS, where it is explicitly
   // marked as unavailable until MacOS 10.12.
   //
#  elif defined(_LIBCPP_VERSION)
#    if _LIBCPP_VERSION >= 1200 &&                                      \
  (!defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) ||           \
   __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101200)
#      define __cpp_lib_uncaught_exceptions 201411
#    endif
   //
   // GCC libstdc++ has it since GCC 6 and it defines the feature test macro.
   // We will also use this for any other runtime.
   //
#  endif
#endif

#endif // BUTL_FT_EXCEPTION