1 files changed, 72 insertions, 0 deletions
diff --git a/src/boost/libs/hof/test/mutable.cpp b/src/boost/libs/hof/test/mutable.cpp
new file mode 100644
index 00000000..d071bc63
--- /dev/null
+++ b/src/boost/libs/hof/test/mutable.cpp
@@ -0,0 +1,72 @@
+/*=============================================================================
+    Copyright (c) 2017 Paul Fultz II
+    mutable.cpp
+    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/hof/mutable.hpp>
+#include <boost/hof/lazy.hpp>
+#include <boost/hof/detail/move.hpp>
+#include <memory>
+#include "test.hpp"
+
+struct mutable_fun
+{
+    int x;
+    mutable_fun() noexcept
+    : x(1)
+    {}
+
+    int operator()(int i) noexcept
+    {
+        x+=i;
+        return x;
+    }
+};
+
+#if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
+BOOST_HOF_TEST_CASE()
+{
+    static_assert(noexcept(boost::hof::mutable_(mutable_fun())(3)), "noexcept mutable_");
+}
+#endif
+
+BOOST_HOF_TEST_CASE()
+{
+    BOOST_HOF_TEST_CHECK(boost::hof::mutable_(mutable_fun())(3) == 4);
+}
+
+BOOST_HOF_TEST_CASE()
+{
+    auto mut_fun = mutable_fun();
+    auto by_5 = boost::hof::lazy(boost::hof::mutable_(std::ref(mut_fun)))(5);
+    BOOST_HOF_TEST_CHECK(by_5() == 6);
+    BOOST_HOF_TEST_CHECK(by_5() == 11);
+}
+
+struct mutable_move_fun
+{
+    std::unique_ptr<int> x;
+    mutable_move_fun() : x(new int(1))
+    {}
+
+    int operator()(int i)
+    {
+        *x+=i;
+        return *x;
+    }
+};
+
+BOOST_HOF_TEST_CASE()
+{
+    BOOST_HOF_TEST_CHECK(boost::hof::mutable_(mutable_move_fun())(3) == 4);
+}
+
+BOOST_HOF_TEST_CASE()
+{
+    auto mut_fun = mutable_move_fun();
+    auto by_5 = boost::hof::lazy(boost::hof::mutable_(boost::hof::move(mut_fun)))(5);
+    BOOST_HOF_TEST_CHECK(by_5() == 6);
+    BOOST_HOF_TEST_CHECK(by_5() == 11);
+}
+