lavina/src/util/xml.rs

use quick_xml::events::Event;
use quick_xml::name::ResolveResult;

use crate::prelude::Result;

pub trait FromXml: Sized {
    type P: Parser<Output = Result<Self>>;

    fn parse() -> Self::P;
}

pub trait Parser: Sized {
    type Output;

    fn consume<'a>(
        self: Self,
        namespace: ResolveResult,
        event: &Event<'a>,
    ) -> Continuation<Self, Self::Output>;
}

pub enum Continuation<Parser, Res> {
    Final(Res),
    Continue(Parser),
}

macro_rules! fail_fast {
    ($errorable: expr) => {
        match $errorable {
            Ok(i) => i,
            Err(e) => return Continuation::Final(Err(e.into())),
        }
    };
}

pub(crate) use fail_fast;