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fix requirement on not_null template

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it should be comparable to nullptr, it does not have to be assignable
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ericLemanissier 2018-05-03 08:08:41 +02:00 committed by GitHub
parent 5cbde3008a
commit 423841e965
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include/gsl/pointers
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@ -69,7 +69,7 @@ template <class T>
class not_null class not_null
{ {
public: public:
static_assert(std::is_assignable<T&, std::nullptr_t>::value, "T cannot be assigned nullptr."); static_assert(std::is_convertible<decltype(std::declval<T>() != nullptr), bool>::value, "T cannot be compared to nullptr.");
template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>> template <typename U, typename = std::enable_if_t<std::is_convertible<U, T>::value>>
constexpr explicit not_null(U&& u) : ptr_(std::forward<U>(u)) constexpr explicit not_null(U&& u) : ptr_(std::forward<U>(u))