20 General utilities library [utilities]

20.11 Smart pointers [smartptr]

20.11.2 Class bad_­weak_­ptr [util.smartptr.weak.bad]

namespace std { class bad_weak_ptr : public exception { public: // see [exception] for the specification of the special member functions const char* what() const noexcept override; }; }
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An exception of type bad_­weak_­ptr is thrown by the shared_­ptr constructor taking a weak_­ptr.
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const char* what() const noexcept override;
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Returns: An implementation-defined ntbs.