ceph/src/boost/libs/hana/example/functional/curry.cpp

   1 // Copyright Louis Dionne 2013-2016
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/config.hpp>
   7 #include <boost/hana/functional/curry.hpp>
   8 namespace hana = boost::hana;
   9
  10
  11 int main() {
  12     BOOST_HANA_CONSTEXPR_LAMBDA auto add = [](auto x, auto y, auto z) {
  13         return x + y + z;
  14     };
  15
  16     BOOST_HANA_CONSTEXPR_CHECK(hana::curry<3>(add)(1)(2)(3) == 1 + 2 + 3);
  17     BOOST_HANA_CONSTEXPR_CHECK(hana::curry<3>(add)(1)(2, 3) == hana::curry<3>(add)(1)(2)(3));
  18     BOOST_HANA_CONSTEXPR_CHECK(hana::curry<3>(add)(1, 2, 3) == hana::curry<3>(add)(1)(2)(3));
  19
  20     // curry with a nullary function
  21     BOOST_HANA_CONSTEXPR_LAMBDA auto two = []() {
  22         return 2;
  23     };
  24
  25     BOOST_HANA_CONSTEXPR_CHECK(hana::curry<0>(two)() == two());
  26 }