mirror of https://github.com/rust-lang/rust
26 lines
416 B
Rust
26 lines
416 B
Rust
struct Params;
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pub trait Plugin<E: ?Sized> {
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type Error;
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}
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pub trait Pluggable {
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fn get_ref<P: Plugin<Self>>(&mut self) -> Option<P::Error> {
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None
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}
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}
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struct Foo;
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impl Plugin<Foo> for Params {
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type Error = ();
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}
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impl<T: Copy> Pluggable for T {}
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fn handle(req: &mut i32) {
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req.get_ref::<Params>();
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//~^ ERROR the trait bound `Params: Plugin<i32>` is not satisfied
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}
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fn main() {}
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