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Do not trivially copy/move assign when not trivially copy/move constructible

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Peter Dimov
2019-03-03 05:14:51 +02:00
parent 30d974d0fc
commit fdfe9df167
4 changed files with 109 additions and 4 deletions
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include/boost/variant2/variant.hpp
+4 -4
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@@ -1201,7 +1201,7 @@ public:
// assignment
template<class E1 = void,
class E2 = mp11::mp_if<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_copy_assignable<T>...>, E1>
class E2 = mp11::mp_if<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_copy_constructible<T>..., detail::is_trivially_copy_assignable<T>...>, E1>
>
BOOST_CXX14_CONSTEXPR variant& operator=( variant const & r ) noexcept
{
@@ -1232,7 +1232,7 @@ private:
public:
template<class E1 = void,
class E2 = mp11::mp_if<mp11::mp_not<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_copy_assignable<T>...>>, E1>,
class E2 = mp11::mp_if<mp11::mp_not<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_copy_constructible<T>..., detail::is_trivially_copy_assignable<T>...>>, E1>,
class E3 = mp11::mp_if<mp11::mp_all<std::is_copy_constructible<T>..., std::is_copy_assignable<T>...>, E1>
>
BOOST_CXX14_CONSTEXPR variant& operator=( variant const & r )
@@ -1243,7 +1243,7 @@ public:
}
template<class E1 = void,
class E2 = mp11::mp_if<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_move_assignable<T>...>, E1>
class E2 = mp11::mp_if<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_move_constructible<T>..., detail::is_trivially_move_assignable<T>...>, E1>
>
BOOST_CXX14_CONSTEXPR variant& operator=( variant && r ) noexcept
{
@@ -1274,7 +1274,7 @@ private:
public:
template<class E1 = void,
class E2 = mp11::mp_if<mp11::mp_not<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_move_assignable<T>...>>, E1>,
class E2 = mp11::mp_if<mp11::mp_not<mp11::mp_all<std::is_trivially_destructible<T>..., detail::is_trivially_move_constructible<T>..., detail::is_trivially_move_assignable<T>...>>, E1>,
class E3 = mp11::mp_if<mp11::mp_all<std::is_move_constructible<T>..., std::is_move_assignable<T>...>, E1>
>
variant& operator=( variant && r )