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impl_option_into_r_null

miniextendr_api::convert

Macro impl_option_into_r_null 

Source 
macro_rules! impl_option_into_r_null {
    ($t:ty) => { ... };
}
Expand description

IntoR for Option<marker> of a reading marker: Some converts the marker, None gives NULL, as for the other containers. The marker’s Option TryFromSexp reads NULL back as None.