100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/*
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* This file is open source software, licensed to you under the terms
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* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
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* distributed with this work for additional information regarding copyright
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* ownership. You may not use this file except in compliance with the License.
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*
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* Copyright (C) 2017 ScyllaDB
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*/
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#define BOOST_TEST_MODULE core
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#include <seastar/util/tuple_utils.hh>
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#include <boost/test/unit_test.hpp>
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#include <sstream>
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#include <type_traits>
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using namespace seastar;
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BOOST_AUTO_TEST_CASE(map) {
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const auto pairs = tuple_map(std::make_tuple(10, 5.5, true), [](auto&& e) { return std::make_tuple(e, e); });
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BOOST_REQUIRE(pairs == std::make_tuple(std::make_tuple(10, 10),
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std::make_tuple(5.5, 5.5),
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std::make_tuple(true, true)));
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}
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BOOST_AUTO_TEST_CASE(for_each) {
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std::ostringstream os;
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tuple_for_each(std::make_tuple('a', 10, false, 5.4), [&os](auto&& e) {
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os << e;
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});
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BOOST_REQUIRE_EQUAL(os.str(), "a1005.4");
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}
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namespace {
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template <typename T>
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struct transform_type final {
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using type = T;
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};
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template <>
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struct transform_type<bool> final { using type = int; };
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template <>
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struct transform_type<double> final { using type = char; };
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}
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BOOST_AUTO_TEST_CASE(map_types) {
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using before_tuple = std::tuple<double, bool, const char*>;
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using after_tuple = typename tuple_map_types<transform_type, before_tuple>::type;
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BOOST_REQUIRE((std::is_same_v<after_tuple, std::tuple<char, int, const char*>>));
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}
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namespace {
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//
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// Strip all `bool` fields.
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//
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template <typename>
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struct keep_type final {
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static constexpr auto value = true;
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};
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template <>
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struct keep_type<bool> final {
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static constexpr auto value = false;
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};
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}
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BOOST_AUTO_TEST_CASE(filter_by_type) {
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using before_tuple = std::tuple<bool, int, bool, double, bool, char>;
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const auto t = tuple_filter_by_type<keep_type>(before_tuple{true, 10, false, 5.5, true, 'a'});
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using filtered_type = std::decay_t<decltype(t)>;
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BOOST_REQUIRE((std::is_same_v<filtered_type, std::tuple<int, double, char>>));
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BOOST_REQUIRE(t == std::make_tuple(10, 5.5, 'a'));
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}
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