ceph/src/boost/libs/variant/test/issue42.cpp

   1 //-----------------------------------------------------------------------------
   2 // boost-libs variant/test/issue42.cpp source file
   3 // See http://www.boost.org for updates, documentation, and revision history.
   4 //-----------------------------------------------------------------------------
   5 //
   6 // Copyright (c) 2018 Antony Polukhin
   7 //
   8 // Distributed under the Boost Software License, Version 1.0. (See
   9 // accompanying file LICENSE_1_0.txt or copy at
  10 // http://www.boost.org/LICENSE_1_0.txt)
  11
  12 // Test case from https://github.com/boostorg/variant/issues/42
  13
  14 #include <boost/variant.hpp>
  15 #include <map>
  16 #include <memory>
  17 #include <vector>
  18
  19
  20
  21 #ifdef BOOST_NO_CXX11_SMART_PTR
  22     template <class T> struct shared_ptr_like {};
  23     typedef shared_ptr_like<boost::recursive_variant_> ptr_t;
  24 #else
  25     typedef std::shared_ptr<boost::recursive_variant_> ptr_t;
  26 #endif
  27
  28 template <class F>
  29 class func{};
  30
  31 int main() {
  32     typedef boost::make_recursive_variant<
  33         int,
  34         ptr_t
  35     >::type node;
  36
  37     node x = 1;
  38     (void)x;
  39
  40
  41     typedef boost::make_recursive_variant<
  42         std::string, int, double, bool,
  43         ptr_t,
  44         std::map<const std::string, boost::recursive_variant_>,
  45         std::vector<boost::recursive_variant_>
  46     >::type node2;
  47
  48     node2 x2 = 1;
  49     (void)x2;
  50
  51
  52     typedef boost::make_recursive_variant<
  53         int,
  54         func<boost::recursive_variant_(*)(boost::recursive_variant_&, const boost::recursive_variant_&)>,
  55         boost::recursive_variant_&(*)(boost::recursive_variant_, boost::recursive_variant_*),
  56         ptr_t
  57     >::type node3;
  58
  59     node3 x3 = func<node3(*)(node3&, const node3&)>();
  60     (void)x3;
  61 }