--- /dev/null
+// Copyright (c) 2018-2020 Emil Dotchevski and Reverge Studios, Inc.
+
+// 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/leaf/handle_errors.hpp>
+#include "_test_res.hpp"
+#include "lightweight_test.hpp"
+
+namespace leaf = boost::leaf;
+
+template <int> struct info { int value; };
+
+template <class ResType>
+ResType f( bool succeed )
+{
+ if( succeed )
+ return 42;
+ else
+ return make_error_code(std::errc::no_such_file_or_directory);
+}
+
+template <class ResType>
+ResType g( bool succeed )
+{
+ if( auto r = f<ResType>(succeed) )
+ return r;
+ else
+ return leaf::error_id(r.error()).load(info<42>{42}).to_error_code();
+}
+
+template <class ResType>
+void test()
+{
+ {
+ int r = leaf::try_handle_all(
+ []
+ {
+ return g<ResType>(true);
+ },
+ []
+ {
+ return -1;
+ } );
+ BOOST_TEST_EQ(r, 42);
+ }
+ {
+ int r = leaf::try_handle_all(
+ [&]
+ {
+ auto r = g<ResType>(false);
+ BOOST_TEST(!r);
+ auto ec = r.error();
+ BOOST_TEST_EQ(ec.message(), "LEAF error");
+ BOOST_TEST(!std::strcmp(ec.category().name(),"LEAF error"));
+ return r;
+ },
+ []( info<42> const & x, std::error_code const & ec )
+ {
+ BOOST_TEST_EQ(x.value, 42);
+ BOOST_TEST_EQ(ec, make_error_code(std::errc::no_such_file_or_directory));
+ return 1;
+ },
+ []
+ {
+ return 2;
+ } );
+ BOOST_TEST_EQ(r, 1);
+ }
+}
+
+int main()
+{
+ test<test_res<int, std::error_code>>();
+ test<test_res<int const, std::error_code>>();
+ test<test_res<int, std::error_code> const>();
+ test<test_res<int const, std::error_code> const>();
+ return boost::report_errors();
+}