20 General utilities library [utilities]

20.7 Variants [variant]

20.7.11 Class bad_­variant_­access [variant.bad.access]

namespace std { class bad_variant_access : public exception { public: // see [exception] for the specification of the special member functions const char* what() const noexcept override; }; }
Objects of type bad_­variant_­access are thrown to report invalid accesses to the value of a variant object.
const char* what() const noexcept override;
Returns: An implementation-defined ntbs.