22 General utilities library [utilities]
22.8.5 Class template specialization bad_expected_access<void> [expected.bad.void]
namespace std {
template<>
class bad_expected_access<void> : public exception {
protected:
constexpr bad_expected_access() noexcept;
constexpr bad_expected_access(const bad_expected_access&) noexcept;
constexpr bad_expected_access(bad_expected_access&&) noexcept;
constexpr bad_expected_access& operator=(const bad_expected_access&) noexcept;
constexpr bad_expected_access& operator=(bad_expected_access&&) noexcept;
constexpr ~bad_expected_access();
public:
constexpr const char* what() const noexcept override;
};
}
constexpr const char* what() const noexcept override;
Returns: An
implementation-defined
ntbs,
which during constant evaluation is encoded with
the ordinary literal encoding (
[lex.ccon])
.