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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_cdr.h>
#include <functional>
void
test_tuple_type_cdr()
{
using type_tuple_isd = std::tuple<int, short, double>;
using type_tuple_sd = std::tuple<short, double>;
using type_tuple_suffix = sigc::internal::tuple_type_cdr<type_tuple_isd>::type;
static_assert(
std::tuple_size<type_tuple_suffix>::value == 2, "unexpected tuple_cdr()ed tuple size.");
static_assert(
std::is_same<type_tuple_suffix, type_tuple_sd>::value, "unexpected tuple_cdr()ed tuple type");
}
void
test_tuple_cdr()
{
auto t_larger = std::make_tuple(nullptr, std::string("hello"), std::string("world"));
auto t_suffix = sigc::internal::tuple_cdr(t_larger);
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::tuple_size<decltype(t_suffix)>::value == 2, "unexpected cdr()ed tuple size.");
static_assert(
std::is_same<decltype(t_suffix), type_tuple_suffix>::value, "unexpected cdr()ed tuple type");
}
void
test_tuple_cdr_stdref()
{
std::string b = "yadda";
std::string c = "yaddayadda";
auto t_larger = std::make_tuple(1, std::ref(b), std::ref(c));
// std::cout << "debug: " << type(std::get<1>(t_larger)) << std::endl;
auto t_suffix = sigc::internal::tuple_cdr(t_larger);
b = "hello";
c = "world";
// This works, but it's not what we are testing here:
// assert(std::get<1>(t_larger) == "hello");
assert(std::get<0>(t_suffix) == "hello");
assert(std::get<1>(t_suffix) == "world");
}
constexpr void
test_tuple_cdr_constexpr()
{
constexpr auto str_hello = "hello";
constexpr auto str_world = "world";
constexpr auto t_larger = std::make_tuple(nullptr, str_hello, str_world);
constexpr auto t_suffix = sigc::internal::tuple_cdr(t_larger);
assert(std::get<0>(t_suffix) == str_hello);
assert(std::get<1>(t_suffix) == str_world);
}
int
main()
{
test_tuple_type_cdr();
test_tuple_cdr();
test_tuple_cdr_stdref();
test_tuple_cdr_constexpr();
return EXIT_SUCCESS;
}
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