clap_builder/util/
graph.rs

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1#[derive(Debug)]
2struct Child<T> {
3    id: T,
4    children: Vec<usize>,
5}
6
7impl<T> Child<T> {
8    fn new(id: T) -> Self {
9        Child {
10            id,
11            children: vec![],
12        }
13    }
14}
15
16#[derive(Debug)]
17pub(crate) struct ChildGraph<T>(Vec<Child<T>>);
18
19impl<T> ChildGraph<T>
20where
21    T: Sized + PartialEq + Clone,
22{
23    pub(crate) fn with_capacity(s: usize) -> Self {
24        ChildGraph(Vec::with_capacity(s))
25    }
26
27    pub(crate) fn insert(&mut self, req: T) -> usize {
28        self.0.iter().position(|e| e.id == req).unwrap_or_else(|| {
29            let idx = self.0.len();
30            self.0.push(Child::new(req));
31            idx
32        })
33    }
34
35    pub(crate) fn insert_child(&mut self, parent: usize, child: T) -> usize {
36        let c_idx = self.0.len();
37        self.0.push(Child::new(child));
38        self.0[parent].children.push(c_idx);
39        c_idx
40    }
41
42    pub(crate) fn iter(&self) -> impl Iterator<Item = &T> {
43        self.0.iter().map(|r| &r.id)
44    }
45
46    pub(crate) fn contains(&self, req: &T) -> bool {
47        self.0.iter().any(|r| r.id == *req)
48    }
49}
clap_builder/util/graph.rs

clap_builder/util/
graph.rs
