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3rdparty/boost_1_81_0/libs/hana/example/count.cpp 806 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/count.hpp>
  #include <boost/hana/equal.hpp>
  #include <boost/hana/integral_constant.hpp>
  #include <boost/hana/tuple.hpp>
  #include <boost/hana/type.hpp>
  namespace hana = boost::hana;
  
  
  int main() {
      constexpr auto ints = hana::tuple_c<int, 1, 2, 3, 2, 2, 4, 2>;
      BOOST_HANA_CONSTANT_CHECK(hana::count(ints, hana::int_c<2>) == hana::size_c<4>);
      static_assert(hana::count(ints, 2) == 4, "");
  
  
      constexpr auto types = hana::tuple_t<int, char, long, short, char, double>;
      BOOST_HANA_CONSTANT_CHECK(hana::count(types, hana::type_c<char>) == hana::size_c<2>);
  }