1 files changed, 80 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/tutorial/introduction.cpp b/src/boost/libs/hana/example/tutorial/introduction.cpp
new file mode 100644
index 000000000..1cafff047
--- /dev/null
+++ b/src/boost/libs/hana/example/tutorial/introduction.cpp
@@ -0,0 +1,80 @@
+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+// Make sure `assert` always triggers an assertion
+#ifdef NDEBUG
+#   undef NDEBUG
+#endif
+
+#include <boost/fusion/include/comparison.hpp>
+#include <boost/fusion/include/make_vector.hpp>
+#include <boost/fusion/include/transform.hpp>
+#include <boost/fusion/include/vector.hpp>
+
+#include <boost/mpl/equal.hpp>
+#include <boost/mpl/placeholders.hpp>
+#include <boost/mpl/transform.hpp>
+#include <boost/mpl/vector.hpp>
+
+#include <algorithm>
+#include <cassert>
+#include <iterator>
+#include <sstream>
+#include <string>
+#include <vector>
+namespace fusion = boost::fusion;
+namespace mpl = boost::mpl;
+using namespace std::literals;
+
+
+int main() {
+
+{
+
+//! [runtime]
+auto f = [](int i) -> std::string {
+  return std::to_string(i * i);
+};
+
+std::vector<int> ints{1, 2, 3, 4};
+std::vector<std::string> strings;
+std::transform(ints.begin(), ints.end(), std::back_inserter(strings), f);
+
+assert((strings == std::vector<std::string>{"1", "4", "9", "16"}));
+//! [runtime]
+
+}{
+
+//! [heterogeneous]
+auto to_string = [](auto t) {
+  std::stringstream ss;
+  ss << t;
+  return ss.str();
+};
+
+fusion::vector<int, std::string, float> seq{1, "abc", 3.4f};
+fusion::vector<std::string, std::string, std::string>
+  strings = fusion::transform(seq, to_string);
+
+assert(strings == fusion::make_vector("1"s, "abc"s, "3.4"s));
+//! [heterogeneous]
+
+}
+
+}
+
+//! [type-level]
+template <typename T>
+struct add_const_pointer {
+  using type = T const*;
+};
+
+using types = mpl::vector<int, char, float, void>;
+using pointers = mpl::transform<types, add_const_pointer<mpl::_1>>::type;
+
+static_assert(mpl::equal<
+  pointers,
+  mpl::vector<int const*, char const*, float const*, void const*>
+>::value, "");
+//! [type-level]