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// Copyright (c) 2018-2025 Jean-Louis Leroy
// 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)
#define BOOST_TEST_MODULE static_list
#include <boost/test/unit_test.hpp>
#include "boost/openmethod/detail/static_list.hpp"
using boost::openmethod::detail::static_list;
struct value : static_list<value>::static_link {};
using test_iter = static_list<value>::iterator;
BOOST_TEST_DONT_PRINT_LOG_VALUE(test_iter);
BOOST_AUTO_TEST_CASE(test_list) {
static static_list<value> l;
static value a, b, c, d;
BOOST_TEST_REQUIRE(l.begin() == l.end());
BOOST_TEST_REQUIRE(l.empty());
l.push_back(a);
// a
BOOST_TEST_REQUIRE(&*l.begin() == &a);
BOOST_TEST_REQUIRE(!l.empty());
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 1);
static_list<value>::iterator iter;
l.push_back(b);
// a b
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 2);
// test iterator post-increment
iter = l.begin();
BOOST_TEST_REQUIRE(iter != l.end());
BOOST_TEST(&*iter++ == &a);
BOOST_TEST_REQUIRE(iter != l.end());
BOOST_TEST(&*iter++ == &b);
BOOST_TEST(iter == l.end());
// test iterator pre-increment
iter = l.begin();
++iter;
BOOST_TEST_REQUIRE(&*iter == &b);
l.push_back(c);
// a b c
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 3);
// test remove from back, the most common case
l.remove(c);
// a b
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 2);
iter = l.begin();
BOOST_TEST_REQUIRE(&*iter++ == &a);
BOOST_TEST_REQUIRE(&*iter++ == &b);
l.push_back(c);
// a b c
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 3);
l.push_back(d);
// a b c d
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 4);
// test remove from front
l.remove(a);
// b c d
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 3);
iter = l.begin();
BOOST_TEST_REQUIRE(&*iter++ == &b);
BOOST_TEST_REQUIRE(&*iter++ == &c);
BOOST_TEST_REQUIRE(&*iter++ == &d);
// test remove from middle
l.remove(b);
// c d
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 2);
iter = l.begin();
BOOST_TEST_REQUIRE(&*iter++ == &c);
BOOST_TEST_REQUIRE(&*iter++ == &d);
// test remove from end
l.remove(c);
// d
iter = l.begin();
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 1);
BOOST_TEST_REQUIRE(&*iter++ == &d);
// test remove from end, one item left
l.remove(d);
BOOST_TEST_REQUIRE(std::distance(l.begin(), l.end()) == 0);
}
struct static_value : static_list<static_value>::static_link {
explicit static_value(static_list<static_value>& reg) {
reg.push_back(*this);
}
};
// Check that static links and list work regardless of static initialization
// order.
using static_test_iter = static_list<static_value>::iterator;
BOOST_TEST_DONT_PRINT_LOG_VALUE(static_test_iter);
namespace link_link_list {
extern static_list<static_value> reg;
static_value a(reg);
static_value b(reg);
static_list<static_value> reg;
BOOST_AUTO_TEST_CASE(test_static_link_link_list) {
auto iter = reg.begin(), last = reg.end();
BOOST_TEST_REQUIRE(iter != last);
BOOST_TEST_REQUIRE(&*iter == &a);
BOOST_TEST_REQUIRE(++iter != last);
BOOST_TEST_REQUIRE(&*iter == &b);
BOOST_TEST_REQUIRE(++iter == last);
}
} // namespace link_link_list
namespace link_list_link {
extern static_list<static_value> reg;
static_value a(reg);
static_list<static_value> reg;
static_value b(reg);
BOOST_AUTO_TEST_CASE(test_static_link_list_link) {
auto iter = reg.begin(), last = reg.end();
BOOST_TEST_REQUIRE(iter != last);
BOOST_TEST_REQUIRE(&*iter == &a);
BOOST_TEST_REQUIRE(++iter != last);
BOOST_TEST_REQUIRE(&*iter == &b);
BOOST_TEST_REQUIRE(++iter == last);
}
} // namespace link_list_link
namespace list_link_link {
static_list<static_value> reg;
static_value a(reg);
static_value b(reg);
BOOST_AUTO_TEST_CASE(test_static_list_link_link) {
auto iter = reg.begin(), last = reg.end();
BOOST_TEST_REQUIRE(iter != last);
BOOST_TEST_REQUIRE(&*iter == &a);
BOOST_TEST_REQUIRE(++iter != last);
BOOST_TEST_REQUIRE(&*iter == &b);
BOOST_TEST_REQUIRE(++iter == last);
}
} // namespace list_link_link
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