[variant.bad.access] (original) (raw)

22 General utilities library [utilities]

22.6 Variants [variant]

22.6.11 Class bad_variant_access [variant.bad.access]

namespace std { class bad_variant_access : public exception { public: constexpr 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.

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]).