1.2 KiB
1.2 KiB
[optional.bad.access]
22 General utilities library [utilities]
22.5 Optional objects [optional]
22.5.6 Class bad_optional_access [optional.bad.access]
namespace std {class bad_optional_access : public exception {public:// see [exception] for the specification of the special member functionsconstexpr const char* what() const noexcept override; };}
The class bad_optional_access defines the type of objects thrown as exceptions to report the situation where an attempt is made to access the value of an optional object that does not contain a value.
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]).