mirror of https://github.com/rust-lang/rust
36 lines
789 B
Rust
36 lines
789 B
Rust
//@ run-pass
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#![allow(unused_imports)]
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// Test that we are able to compile calls to associated fns like
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// `decode()` where the bound on the `Self` parameter references a
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// lifetime parameter of the trait. This example indicates why trait
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// lifetime parameters must be early bound in the type of the
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// associated item.
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//@ pretty-expanded FIXME #23616
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use std::marker;
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pub enum Value<'v> {
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A(&'v str),
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B,
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}
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pub trait Decoder<'v> {
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fn read(&mut self) -> Value<'v>;
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}
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pub trait Decodable<'v, D: Decoder<'v>> {
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fn decode(d: &mut D) -> Self;
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}
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impl<'v, D: Decoder<'v>> Decodable<'v, D> for () {
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fn decode(d: &mut D) -> () {
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match d.read() {
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Value::A(..) => (),
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Value::B => Decodable::decode(d),
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}
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}
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}
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pub fn main() { }
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