The type \ref{State} contains each of the States in the United~States, with the addition of Washington~DC. The States are 1-indexed and sorted by \emph{abbreviation}\footnote{ States are sorted by abbreviation rather than the State name beacuse they are most frequently referenced as such.}.

For operations that involve taking values of all states where order matters (e.g. for index alignment), querying the symbol table isn't appropriate, as it does not guarantee order. \ref{_for-each-state_} can be used for that purpose; it exposes the following template values to its body: \begin{enumerate} \item \tt{@state_const@} contains the State constant; \item \tt{@state_upper@} contains the uppercase two-letter State abbreviation; \item \tt{@state_lower@} contains the lowercase two-letter State abbreviation; and \item \tt{@state_name@} contains the full state name. \end{enumerate} This can be used to generate a ^[State vector] by mapping an iteration index to the State constant~\tt{@state_const@}. Note that \ref{STATE_NONE} is not in the list. To ease iteration though ^[State vector]s generated with \ref{_for-each-state_}, a 52~vector \ref{NVEC_STATE_ALL} and classification \ref{state-all} are provided.