cxx_build/vec.rs
1use crate::intern::{self, InternedString};
2use std::path::Path;
3
4pub(crate) trait InternedVec<T>
5where
6 T: ?Sized,
7{
8 fn vec(&self) -> Vec<&'static T>;
9}
10
11impl<T> InternedVec<T> for Vec<InternedString>
12where
13 T: ?Sized + Element,
14{
15 fn vec(&self) -> Vec<&'static T> {
16 self.iter().copied().map(Element::unintern).collect()
17 }
18}
19
20pub(crate) fn intern<T>(elements: &[&T]) -> Vec<InternedString>
21where
22 T: ?Sized + Element,
23{
24 elements.iter().copied().map(Element::intern).collect()
25}
26
27pub(crate) trait Element {
28 fn intern(&self) -> InternedString;
29 fn unintern(_: InternedString) -> &'static Self;
30}
31
32impl Element for str {
33 fn intern(&self) -> InternedString {
34 intern::intern(self)
35 }
36
37 fn unintern(interned: InternedString) -> &'static Self {
38 interned.str()
39 }
40}
41
42impl Element for Path {
43 fn intern(&self) -> InternedString {
44 intern::intern(&self.to_string_lossy())
45 }
46
47 fn unintern(interned: InternedString) -> &'static Self {
48 Path::new(interned.str())
49 }
50}