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31 lines
631 B
Rust
31 lines
631 B
Rust
// check-pass
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// Found in a crater run on #118553
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pub trait QueryBase {
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type Db;
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}
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pub trait AsyncQueryFunction<'f>: // 'f is important
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QueryBase<Db = <Self as AsyncQueryFunction<'f>>::SendDb> // bound is important
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{
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type SendDb;
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}
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pub struct QueryTable<'me, Q, DB> {
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_q: Option<Q>,
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_db: Option<DB>,
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_marker: Option<&'me ()>,
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}
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impl<'me, Q> QueryTable<'me, Q, <Q as QueryBase>::Db> // projection is important
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// ^^^ removing 'me (and in QueryTable) gives a different error
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where
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Q: for<'f> AsyncQueryFunction<'f>,
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{
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pub fn get_async<'a>(&'a mut self) {
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panic!();
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}
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}
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fn main() {}
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