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stuce-bot 2025-06-30 20:47:33 +02:00
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libraries/M5Utility/test/expected/constructors.cpp Normal file
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#include <gtest/gtest.h>
#include <m5_utility/stl/expected.hpp>
#include <type_traits>
#include <vector>
#include <string>
struct takes_init_and_variadic {
std::vector<int> v;
std::tuple<int, int> t;
template <class... Args>
takes_init_and_variadic(std::initializer_list<int> l, Args &&...args) : v(l), t(std::forward<Args>(args)...)
{
}
};
TEST(Expected, Constructors)
{
{
m5::stl::expected<int, int> e;
EXPECT_TRUE(e);
EXPECT_TRUE(e == 0);
}
{
m5::stl::expected<int, int> e = m5::stl::make_unexpected(0);
EXPECT_TRUE(!e);
EXPECT_TRUE(e.error() == 0);
}
{
m5::stl::expected<int, int> e(m5::stl::unexpect, 0);
EXPECT_TRUE(!e);
EXPECT_TRUE(e.error() == 0);
}
{
m5::stl::expected<int, int> e(m5::stl::in_place, 42);
EXPECT_TRUE(e);
EXPECT_TRUE(e == 42);
}
{
m5::stl::expected<std::vector<int>, int> e(m5::stl::in_place, {0, 1});
EXPECT_TRUE(e);
EXPECT_TRUE((*e)[0] == 0);
EXPECT_TRUE((*e)[1] == 1);
}
{
m5::stl::expected<std::tuple<int, int>, int> e(m5::stl::in_place, 0, 1);
EXPECT_TRUE(e);
EXPECT_TRUE(std::get<0>(*e) == 0);
EXPECT_TRUE(std::get<1>(*e) == 1);
}
{
m5::stl::expected<takes_init_and_variadic, int> e(m5::stl::in_place, {0, 1}, 2, 3);
EXPECT_TRUE(e);
EXPECT_TRUE(e->v[0] == 0);
EXPECT_TRUE(e->v[1] == 1);
EXPECT_TRUE(std::get<0>(e->t) == 2);
EXPECT_TRUE(std::get<1>(e->t) == 3);
}
{
m5::stl::expected<int, int> e;
EXPECT_TRUE(std::is_default_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_move_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_assignable<decltype(e)>::value);
EXPECT_TRUE(std::is_move_assignable<decltype(e)>::value);
EXPECT_TRUE(TL_EXPECTED_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(decltype(e))::value);
EXPECT_TRUE(TL_EXPECTED_IS_TRIVIALLY_COPY_ASSIGNABLE(decltype(e))::value);
#if !defined(TL_EXPECTED_GCC49)
EXPECT_TRUE(std::is_trivially_move_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_trivially_move_assignable<decltype(e)>::value);
#endif
}
{
m5::stl::expected<int, std::string> e;
EXPECT_TRUE(std::is_default_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_move_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_assignable<decltype(e)>::value);
EXPECT_TRUE(std::is_move_assignable<decltype(e)>::value);
EXPECT_TRUE(!TL_EXPECTED_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(decltype(e))::value);
EXPECT_TRUE(!TL_EXPECTED_IS_TRIVIALLY_COPY_ASSIGNABLE(decltype(e))::value);
#if !defined(TL_EXPECTED_GCC49)
EXPECT_TRUE(!std::is_trivially_move_constructible<decltype(e)>::value);
EXPECT_TRUE(!std::is_trivially_move_assignable<decltype(e)>::value);
#endif
}
{
m5::stl::expected<std::string, int> e;
EXPECT_TRUE(std::is_default_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_move_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_assignable<decltype(e)>::value);
EXPECT_TRUE(std::is_move_assignable<decltype(e)>::value);
EXPECT_TRUE(!TL_EXPECTED_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(decltype(e))::value);
EXPECT_TRUE(!TL_EXPECTED_IS_TRIVIALLY_COPY_ASSIGNABLE(decltype(e))::value);
#if !defined(TL_EXPECTED_GCC49)
EXPECT_TRUE(!std::is_trivially_move_constructible<decltype(e)>::value);
EXPECT_TRUE(!std::is_trivially_move_assignable<decltype(e)>::value);
#endif
}
{
m5::stl::expected<std::string, std::string> e;
EXPECT_TRUE(std::is_default_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_move_constructible<decltype(e)>::value);
EXPECT_TRUE(std::is_copy_assignable<decltype(e)>::value);
EXPECT_TRUE(std::is_move_assignable<decltype(e)>::value);
EXPECT_TRUE(!TL_EXPECTED_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(decltype(e))::value);
EXPECT_TRUE(!TL_EXPECTED_IS_TRIVIALLY_COPY_ASSIGNABLE(decltype(e))::value);
#if !defined(TL_EXPECTED_GCC49)
EXPECT_TRUE(!std::is_trivially_move_constructible<decltype(e)>::value);
EXPECT_TRUE(!std::is_trivially_move_assignable<decltype(e)>::value);
#endif
}
{
m5::stl::expected<void, int> e;
EXPECT_TRUE(e);
}
{
m5::stl::expected<void, int> e(m5::stl::unexpect, 42);
EXPECT_TRUE(!e);
EXPECT_TRUE(e.error() == 42);
}
}