Derive Macro StructType 

#[derive(StructType)]

Derive StructType for user defined struct.

Structs that implement StructType can be used as Arrow struct types.

Examples

#[derive(StructType)]
struct KeyValue<'a> {
    key: &'a str,
    value: &'a str,
}

#[function("split_kv(string) -> struct KeyValue")]
fn split_kv(kv: &str) -> Option<KeyValue<'_>> {
    let (key, value) = kv.split_once('=')?;
    Some(KeyValue { key, value })
}