fn factor_elt_to_choice<T: MatchArg>(sexp: SEXP) -> Result<T, MatchArgError>Expand description
Extract a single choice from a factor SEXP (INTSXP with levels attribute).
fn factor_elt_to_choice<T: MatchArg>(sexp: SEXP) -> Result<T, MatchArgError>Extract a single choice from a factor SEXP (INTSXP with levels attribute).