alder/
ast.rs

1use crate::*;
2
3pub trait Ast: Sized {
4    fn parse(iter: &mut impl Iterator<Item = Node>) -> Option<Self>;
5}
6
7impl<T> Ast for Vec<T>
8where
9    T: Ast,
10{
11    fn parse(iter: &mut impl Iterator<Item = Node>) -> Option<Self> {
12        let res: Self = iter
13            .filter_map(|node| {
14                let nodes = node.iter().cloned().collect::<Vec<Node>>();
15                Ast::parse(&mut nodes.into_iter())
16            })
17            .collect();
18
19        Some(res)
20    }
21}
22
23impl<T> Ast for Box<T>
24where
25    T: Ast,
26{
27    fn parse(iter: &mut impl Iterator<Item = Node>) -> Option<Self> {
28        T::parse(iter).map(Box::new)
29    }
30}
alder/ast.rs

alder/
ast.rs
