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Disable U&& constructor for derived types

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Peter Dimov
2021-03-12 23:40:14 +02:00
parent f586dc8848
commit 90cda5339f
1 changed files with 1 additions and 1 deletions
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include/boost/variant2/variant.hpp
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@ -1581,7 +1581,7 @@ public:
template<class U,
class Ud = typename std::decay<U>::type,
class E1 = typename std::enable_if< !std::is_same<Ud, variant>::value && !detail::is_in_place_index<Ud>::value && !detail::is_in_place_type<Ud>::value >::type,
class E1 = typename std::enable_if< !std::is_same<Ud, variant>::value && !std::is_base_of<variant, Ud>::value && !detail::is_in_place_index<Ud>::value && !detail::is_in_place_type<Ud>::value >::type,
class V = detail::resolve_overload_type<U&&, T...>,
class E2 = typename std::enable_if<std::is_constructible<V, U&&>::value>::type
>