syn/
span.rs

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1use proc_macro2::Span;
2
3pub trait IntoSpans<S> {
4    fn into_spans(self) -> S;
5}
6
7impl IntoSpans<[Span; 1]> for Span {
8    fn into_spans(self) -> [Span; 1] {
9        [self]
10    }
11}
12
13impl IntoSpans<[Span; 2]> for Span {
14    fn into_spans(self) -> [Span; 2] {
15        [self, self]
16    }
17}
18
19impl IntoSpans<[Span; 3]> for Span {
20    fn into_spans(self) -> [Span; 3] {
21        [self, self, self]
22    }
23}
24
25impl IntoSpans<[Span; 1]> for [Span; 1] {
26    fn into_spans(self) -> [Span; 1] {
27        self
28    }
29}
30
31impl IntoSpans<[Span; 2]> for [Span; 2] {
32    fn into_spans(self) -> [Span; 2] {
33        self
34    }
35}
36
37impl IntoSpans<[Span; 3]> for [Span; 3] {
38    fn into_spans(self) -> [Span; 3] {
39        self
40    }
41}
42
43#[cfg(feature = "parsing")]
44pub trait FromSpans: Sized {
45    fn from_spans(spans: &[Span]) -> Self;
46}
47
48#[cfg(feature = "parsing")]
49impl FromSpans for [Span; 1] {
50    fn from_spans(spans: &[Span]) -> Self {
51        [spans[0]]
52    }
53}
54
55#[cfg(feature = "parsing")]
56impl FromSpans for [Span; 2] {
57    fn from_spans(spans: &[Span]) -> Self {
58        [spans[0], spans[1]]
59    }
60}
61
62#[cfg(feature = "parsing")]
63impl FromSpans for [Span; 3] {
64    fn from_spans(spans: &[Span]) -> Self {
65        [spans[0], spans[1], spans[2]]
66    }
67}
syn/span.rs

syn/
span.rs
