1 // Copyright Louis Dionne 2013-2017
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)
5 // Make sure `assert` always triggers an assertion
10 #include <boost/fusion/include/comparison.hpp>
11 #include <boost/fusion/include/make_vector.hpp>
12 #include <boost/fusion/include/transform.hpp>
13 #include <boost/fusion/include/vector.hpp>
15 #include <boost/mpl/equal.hpp>
16 #include <boost/mpl/placeholders.hpp>
17 #include <boost/mpl/transform.hpp>
18 #include <boost/mpl/vector.hpp>
26 namespace fusion = boost::fusion;
27 namespace mpl = boost::mpl;
28 using namespace std::literals;
36 auto f = [](int i) -> std::string {
37 return std::to_string(i * i);
40 std::vector<int> ints{1, 2, 3, 4};
41 std::vector<std::string> strings;
42 std::transform(ints.begin(), ints.end(), std::back_inserter(strings), f);
44 assert((strings == std::vector<std::string>{"1", "4", "9", "16"}));
50 auto to_string = [](auto t) {
56 fusion::vector<int, std::string, float> seq{1, "abc", 3.4f};
57 fusion::vector<std::string, std::string, std::string>
58 strings = fusion::transform(seq, to_string);
60 assert(strings == fusion::make_vector("1"s, "abc"s, "3.4"s));
69 struct add_const_pointer {
70 using type = T const*;
73 using types = mpl::vector<int, char, float, void>;
74 using pointers = mpl::transform<types, add_const_pointer<mpl::_1>>::type;
76 static_assert(mpl::equal<
78 mpl::vector<int const*, char const*, float const*, void const*>