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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_start.h>
#include <functional>
void
test_tuple_type_start()
{
{
using type_tuple = std::tuple<int, short, double>;
using type_tuple_start = sigc::internal::tuple_type_start<type_tuple, 1>::type;
using type_tuple_expected = std::tuple<int>;
static_assert(std::is_same<type_tuple_start, type_tuple_expected>::value,
"unexpected type_tuple_start type");
}
{
using type_tuple = std::tuple<int, short, double>;
using type_tuple_start = sigc::internal::tuple_type_start<type_tuple, 2>::type;
using type_tuple_expected = std::tuple<int, short>;
static_assert(std::is_same<type_tuple_start, type_tuple_expected>::value,
"unexpected type_tuple_start type");
}
{
using type_tuple = std::tuple<int, short, double>;
using type_tuple_start = sigc::internal::tuple_type_start<type_tuple, 3>::type;
using type_tuple_expected = std::tuple<int, short, double>;
static_assert(std::is_same<type_tuple_start, type_tuple_expected>::value,
"unexpected type_tuple_start type");
}
}
void
test_tuple_start()
{
{
auto t_original = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_prefix = sigc::internal::tuple_start<3>(t_original);
static_assert(
std::tuple_size<decltype(t_prefix)>::value == 3, "unexpected tuple_start()ed tuple size.");
assert(std::get<0>(t_prefix) == nullptr);
assert(std::get<1>(t_prefix) == "hello");
assert(std::get<2>(t_prefix) == "world");
static_assert(std::is_same<decltype(t_prefix), decltype(t_original)>::value,
"unexpected start()ed tuple type");
}
{
auto t_original = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_prefix = sigc::internal::tuple_start<2>(t_original);
static_assert(
std::tuple_size<decltype(t_prefix)>::value == 2, "unexpected tuple_start()ed tuple size.");
assert(std::get<0>(t_prefix) == nullptr);
assert(std::get<1>(t_prefix) == "hello");
using type_tuple_prefix = std::tuple<std::nullptr_t, std::string>;
static_assert(std::is_same<decltype(t_prefix), type_tuple_prefix>::value,
"unexpected start()ed tuple type");
}
{
auto t_original = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_prefix = sigc::internal::tuple_start<1>(t_original);
static_assert(
std::tuple_size<decltype(t_prefix)>::value == 1, "unexpected tuple_start()ed tuple size.");
assert(std::get<0>(t_prefix) == nullptr);
using type_tuple_prefix = std::tuple<std::nullptr_t>;
static_assert(std::is_same<decltype(t_prefix), type_tuple_prefix>::value,
"unexpected start()ed tuple type");
}
}
void
test_tuple_start_stdref()
{
std::string a = "yadda";
std::string b = "yaddayadda";
auto t_larger = std::make_tuple(std::ref(a), std::ref(b), 1);
auto t_prefix = sigc::internal::tuple_start<2>(t_larger);
a = "hello";
b = "world";
// This works, but it's not what we are testing here:
// assert(std::get<0>(t_larger) == "hello");
assert(std::get<0>(t_prefix) == "hello");
assert(std::get<1>(t_prefix) == "world");
}
constexpr void
test_tuple_start_constexpr()
{
constexpr auto str_hello = "hello";
constexpr auto str_world = "hello";
constexpr auto t_original = std::make_tuple(nullptr, str_hello, str_world);
constexpr auto t_prefix = sigc::internal::tuple_start<2>(t_original);
static_assert(
std::tuple_size<decltype(t_prefix)>::value == 2, "unexpected tuple_start()ed tuple size.");
assert(std::get<0>(t_prefix) == nullptr);
assert(std::get<1>(t_prefix) == str_hello);
}
int
main()
{
test_tuple_type_start();
test_tuple_start();
test_tuple_start_stdref();
test_tuple_start_constexpr();
}
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