text: //-----------------------------------------------------------------------------
  // boost-libs variant/test/issue42.cpp source file
  // See http://www.boost.org for updates, documentation, and revision history.
  //-----------------------------------------------------------------------------
  //
  // Copyright (c) 2018 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)
  
  // Test case from https://github.com/boostorg/variant/issues/42
  
  #include <boost/variant.hpp>
  #include <map>
  #include <memory>
  #include <vector>
  
  
  
  #ifdef BOOST_NO_CXX11_SMART_PTR
      template <class T> struct shared_ptr_like {};
      typedef shared_ptr_like<boost::recursive_variant_> ptr_t;
  #else
      typedef std::shared_ptr<boost::recursive_variant_> ptr_t;
  #endif
  
  template <class F>
  class func{};
  
  int main() {
      typedef boost::make_recursive_variant<
          int,
          ptr_t
      >::type node;
  
      node x = 1;
      (void)x;
  
  
      typedef boost::make_recursive_variant<
          std::string, int, double, bool,
          ptr_t,
          std::map<const std::string, boost::recursive_variant_>,
          std::vector<boost::recursive_variant_>
      >::type node2;
  
      node2 x2 = 1;
      (void)x2;
  
  
      typedef boost::make_recursive_variant<
          int,
          func<boost::recursive_variant_(*)(boost::recursive_variant_&, const boost::recursive_variant_&)>,
          boost::recursive_variant_&(*)(boost::recursive_variant_, boost::recursive_variant_*),
          ptr_t
      >::type node3;
  
      node3 x3 = func<node3(*)(node3&, const node3&)>();
      (void)x3;
  }
  