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3rdparty/boost_1_81_0/libs/hana/example/empty.cpp 553 Bytes
73ef4ff3   Hu Chunming   提交三方库
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  // Copyright Louis Dionne 2013-2022
  // Distributed under the Boost Software License, Version 1.0.
  // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
  
  #include <boost/hana/assert.hpp>
  #include <boost/hana/empty.hpp>
  #include <boost/hana/equal.hpp>
  #include <boost/hana/optional.hpp>
  #include <boost/hana/tuple.hpp>
  namespace hana = boost::hana;
  
  
  BOOST_HANA_CONSTANT_CHECK(hana::empty<hana::tuple_tag>() == hana::make_tuple());
  BOOST_HANA_CONSTANT_CHECK(hana::empty<hana::optional_tag>() == hana::nothing);
  
  int main() { }