musli_macros/internals/
apply.rs

Help
1use proc_macro2::TokenStream;
2use quote::ToTokens;
3
4pub(crate) trait Apply<T> {
5    fn apply(&self, value: &T, tokens: &mut TokenStream);
6}
7
8impl<F, T> Apply<T> for F
9where
10    F: Fn(&T, &mut TokenStream),
11{
12    fn apply(&self, value: &T, tokens: &mut TokenStream) {
13        self(value, tokens)
14    }
15}
16
17pub(crate) struct IterItem<'a, A, T> {
18    apply: A,
19    value: &'a T,
20}
21
22impl<'a, A, T> ToTokens for IterItem<'a, A, T>
23where
24    A: Apply<T>,
25{
26    fn to_tokens(&self, tokens: &mut TokenStream) {
27        self.apply.apply(self.value, tokens);
28    }
29}
30
31pub(crate) struct Iter<'a, I, T> {
32    iter: I,
33    value: &'a T,
34}
35
36impl<'a, I, T> Iterator for Iter<'a, I, T>
37where
38    I: Iterator<Item: Apply<T>>,
39{
40    type Item = IterItem<'a, I::Item, T>;
41
42    fn next(&mut self) -> Option<Self::Item> {
43        let f = self.iter.next()?;
44
45        Some(IterItem {
46            apply: f,
47            value: self.value,
48        })
49    }
50}
51
52/// Apply an iterator of functions to a value.
53pub(crate) fn iter<I, T>(iter: I, value: &T) -> Iter<'_, I::IntoIter, T>
54where
55    I: IntoIterator<Item: Apply<T>>,
56{
57    Iter {
58        iter: iter.into_iter(),
59        value,
60    }
61}
musli_macros/internals/apply.rs

musli_macros/internals/
apply.rs
