// Copyright 2026 Braden Ganetsky
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt

#include <boost/static_assert.hpp>
#include <boost/unordered/concurrent_flat_map.hpp>
#include <boost/unordered/concurrent_flat_set.hpp>
#include <boost/unordered/concurrent_node_map.hpp>
#include <boost/unordered/concurrent_node_set.hpp>
// Don't include the FOA headers here!

using c_flat_map = boost::unordered::concurrent_flat_map<int, int>;
using c_flat_set = boost::unordered::concurrent_flat_set<int>;
using c_node_map = boost::unordered::concurrent_node_map<int, int>;
using c_node_set = boost::unordered::concurrent_node_set<int>;

struct constrained_template_converter
{
  struct dummy
  {
  };
  template <class T, typename std::enable_if<
                       std::is_constructible<T, dummy>::value, int>::type = 0>
  operator T() const
  {
    return T{};
  }
};

// Check whether the corresponding FOA container gets instantiated.
// The FOA headers aren't included, so this would fail to compile if the FOA
// container was instantiated.
BOOST_STATIC_ASSERT(
  (!std::is_constructible<c_flat_map, constrained_template_converter>::value));
BOOST_STATIC_ASSERT(
  (!std::is_constructible<c_flat_set, constrained_template_converter>::value));
BOOST_STATIC_ASSERT(
  (!std::is_constructible<c_node_map, constrained_template_converter>::value));
BOOST_STATIC_ASSERT(
  (!std::is_constructible<c_node_set, constrained_template_converter>::value));

int main() { return 0; }