1 files changed, 52 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/tutorial/rationale.container.cpp b/src/boost/libs/hana/example/tutorial/rationale.container.cpp
new file mode 100644
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+++ b/src/boost/libs/hana/example/tutorial/rationale.container.cpp
@@ -0,0 +1,52 @@
+// 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)
+
+#include <boost/hana.hpp>
+
+#include <boost/fusion/include/find_if.hpp>
+#include <boost/fusion/include/make_vector.hpp>
+#include <boost/mpl/quote.hpp>
+
+#include <type_traits>
+namespace fusion = boost::fusion;
+namespace mpl = boost::mpl;
+namespace hana = boost::hana;
+
+
+int main() {
+
+{
+
+//! [hana]
+auto tuple = hana::make_tuple(1, 'x', 3.4f);
+
+auto result = hana::find_if(tuple, [](auto const& x) {
+  return hana::traits::is_integral(hana::typeid_(x));
+});
+//! [hana]
+(void)result;
+
+#if 0
+//! [hana-explicit]
+some_type result = hana::find_if(tuple, [](auto const& x) {
+  return hana::traits::is_integral(hana::typeid_(x));
+});
+//! [hana-explicit]
+#endif
+
+}{
+
+//! [fusion]
+using Container = fusion::result_of::make_vector<int, char, float>::type;
+Container tuple = fusion::make_vector(1, 'x', 3.4f);
+
+using Predicate = mpl::quote1<std::is_integral>;
+using Result = fusion::result_of::find_if<Container, Predicate>::type;
+Result result = fusion::find_if<Predicate>(tuple);
+//! [fusion]
+(void)result;
+
+}
+
+}