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/* Copyright (C) 2016 Murray Cumming
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/
*/
#include <cassert>
#include <cstdlib>
#include <string>
#include <sigc++/tuple-utils/tuple_end.h>
#include <functional>
void
test_tuple_end()
{
{
auto t_original = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_suffix = sigc::internal::tuple_end<3>(t_original);
static_assert(
std::tuple_size<decltype(t_suffix)>::value == 3, "unexpected tuple_end()ed tuple size.");
assert(std::get<0>(t_suffix) == nullptr);
assert(std::get<1>(t_suffix) == "hello");
assert(std::get<2>(t_suffix) == "world");
static_assert(std::is_same<decltype(t_suffix), decltype(t_original)>::value,
"unexpected end()ed tuple type");
}
{
auto t_original = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_suffix = sigc::internal::tuple_end<2>(t_original);
static_assert(
std::tuple_size<decltype(t_suffix)>::value == 2, "unexpected tuple_end()ed tuple size.");
assert(std::get<0>(t_suffix) == "hello");
assert(std::get<1>(t_suffix) == "world");
using type_tuple_suffix = std::tuple<std::string, std::string>;
static_assert(
std::is_same<decltype(t_suffix), type_tuple_suffix>::value, "unexpected end()ed tuple type");
}
{
auto t_original = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_suffix = sigc::internal::tuple_end<1>(t_original);
static_assert(
std::tuple_size<decltype(t_suffix)>::value == 1, "unexpected tuple_end()ed tuple size.");
assert(std::get<0>(t_suffix) == "world");
using type_tuple_suffix = std::tuple<std::string>;
static_assert(
std::is_same<decltype(t_suffix), type_tuple_suffix>::value, "unexpected end()ed tuple type");
}
}
void
test_tuple_end_stdref()
{
std::string c = "yadda";
std::string d = "yaddayadda";
auto t_larger = std::make_tuple(1, 2, std::ref(c), std::ref(d));
auto t_suffix = sigc::internal::tuple_end<2>(t_larger);
c = "hello";
d = "world";
// This works, but it's not what we are testing here:
// assert(std::get<0>(t_larger) == "hello");
assert(std::get<0>(t_suffix) == "hello");
assert(std::get<1>(t_suffix) == "world");
}
constexpr void
test_tuple_end_constexpr()
{
constexpr auto str_hello = "hello";
constexpr auto str_world = "world";
constexpr auto t_original = std::make_tuple(nullptr, str_hello, str_world);
constexpr auto t_suffix = sigc::internal::tuple_end<2>(t_original);
static_assert(
std::tuple_size<decltype(t_suffix)>::value == 2, "unexpected tuple_end()ed tuple size.");
assert(std::get<0>(t_suffix) == str_hello);
assert(std::get<1>(t_suffix) == str_world);
}
int
main()
{
test_tuple_end();
test_tuple_end_stdref();
test_tuple_end_constexpr();
return EXIT_SUCCESS;
}
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