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util: Implement Expected::operator*()&&

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It is currently unused, but implementing it is closer to std::expected.
This commit is contained in:
MarcoFalke
2025-12-09 16:17:56 +01:00
parent fab9721430
commit fabb47e4e3
2 changed files with 10 additions and 2 deletions
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7
src/test/util_expected_tests.cpp
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@@ -50,6 +50,13 @@ BOOST_AUTO_TEST_CASE(expected_value_rvalue)
BOOST_CHECK_EQUAL(*moved, 5);
}
BOOST_AUTO_TEST_CASE(expected_deref_rvalue)
{
Expected<std::unique_ptr<int>, int> no_copy{std::make_unique<int>(5)};
const auto moved{*std::move(no_copy)};
BOOST_CHECK_EQUAL(*moved, 5);
}
BOOST_AUTO_TEST_CASE(expected_value_or)
{
Expected<std::unique_ptr<int>, int> no_copy{std::make_unique<int>(1)};

5
src/util/expected.h
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@@ -88,8 +88,9 @@ public:
constexpr E& error() & noexcept LIFETIMEBOUND { return *Assert(std::get_if<1>(&m_data)); }
constexpr E&& error() && noexcept LIFETIMEBOUND { return std::move(error()); }
constexpr T& operator*() noexcept LIFETIMEBOUND { return value(); }
constexpr const T& operator*() const noexcept LIFETIMEBOUND { return value(); }
constexpr T& operator*() & noexcept LIFETIMEBOUND { return value(); }
constexpr const T& operator*() const& noexcept LIFETIMEBOUND { return value(); }
constexpr T&& operator*() && noexcept LIFETIMEBOUND { return std::move(value()); }
constexpr T* operator->() noexcept LIFETIMEBOUND { return &value(); }
constexpr const T* operator->() const noexcept LIFETIMEBOUND { return &value(); }