std::variant_npos
Defined in header <variant>
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inline constexpr std::size_t variant_npos = -1; |
(since C++17) | |
This is a special value equal to the largest value representable by the type std::size_t
, used as the return type of index() when valueless_by_exception() is true
See also
returns the zero-based index of the alternative held by the variant (public member function) | |
checks if the variant is in the invalid state (public member function) |