Macro abi_stable::rtry

macro_rules! rtry {
    ($expr:expr) => { ... };
}

Equivalent to ? for RResult.

Accepts both Result and RResult arguments.

Example

Defining an extern function that returns a result.

use abi_stable::{
    std_types::{RResult, ROk, RBoxError, RStr, Tuple3},
    rtry,
    sabi_extern_fn,
};


#[sabi_extern_fn]
fn parse_tuple(s: RStr<'_>) -> RResult<Tuple3<u32, u32, u32>, RBoxError> {
    let mut iter = s.split(',').map(|x| x.trim());
    ROk(Tuple3(
        rtry!(iter.next().unwrap_or("").parse().map_err(RBoxError::new)),
        rtry!(iter.next().unwrap_or("").parse().map_err(RBoxError::new)),
        rtry!(iter.next().unwrap_or("").parse().map_err(RBoxError::new)),
    ))
}

assert_eq!(parse_tuple("3, 5, 8".into()).unwrap(), Tuple3(3, 5, 8));
parse_tuple("".into()).unwrap_err();