67 lines
1.2 KiB
Rust
67 lines
1.2 KiB
Rust
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// check-pass
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struct It;
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struct Data {
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items: Vec<It>,
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}
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impl Data {
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fn new() -> Self {
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Self {
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items: vec![It, It],
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}
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}
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fn content(&self) -> impl Iterator<Item = &It> {
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self.items.iter()
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}
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}
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struct Container<'a> {
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name: String,
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resolver: Box<dyn Resolver + 'a>,
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}
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impl<'a> Container<'a> {
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fn new<R: Resolver + 'a>(name: &str, resolver: R) -> Self {
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Self {
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name: name.to_owned(),
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resolver: Box::new(resolver),
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}
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}
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}
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trait Resolver {}
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impl<R: Resolver> Resolver for &R {}
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impl Resolver for It {}
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fn get<'a>(mut items: impl Iterator<Item = &'a It>) -> impl Resolver + 'a {
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items.next().unwrap()
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}
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fn get2<'a, 'b: 'b>(mut items: impl Iterator<Item = &'a It>) -> impl Resolver + 'a {
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items.next().unwrap()
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}
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fn main() {
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let data = Data::new();
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let resolver = get(data.content());
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let _ = ["a", "b"]
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.iter()
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.map(|&n| Container::new(n, &resolver))
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.map(|c| c.name)
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.collect::<Vec<_>>();
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let resolver = get2(data.content());
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let _ = ["a", "b"]
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.iter()
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.map(|&n| Container::new(n, &resolver))
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.map(|c| c.name)
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.collect::<Vec<_>>();
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}
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