text: // Copyright 2015-2017 Hans Dembinski
  //
  // 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)
  
  #include <boost/core/lightweight_test.hpp>
  #include <boost/histogram/detail/static_if.hpp>
  #include "throw_exception.hpp"
  
  using namespace boost::histogram::detail;
  
  int main() {
    using T = std::true_type;
    using F = std::false_type;
  
    // check that branch not taken does not have to compile
    BOOST_TEST_EQ(static_if<T>([](auto) { return 1; }, [] {}, 0), 1);
    BOOST_TEST_EQ(static_if<F>([] {}, [](auto) { return 1; }, 0), 1);
  
    BOOST_TEST_EQ(static_if_c<true>([](auto) { return 1; }, [] {}, 0), 1);
    BOOST_TEST_EQ(static_if_c<false>([] {}, [](auto) { return 1; }, 0), 1);
  
    // check that noexcept is correctly propagated
    auto may_throw = [](auto x) { return x; };
    auto no_throw = [](auto x) noexcept { return x; };
  
    // make this work with -fno-exceptions
    BOOST_TEST_EQ(noexcept(static_if<F>(no_throw, may_throw, 0)), noexcept(may_throw(0)));
    BOOST_TEST(noexcept(static_if<T>(no_throw, may_throw, 0)));
  
    return boost::report_errors();
  }
  