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Merge #6921

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6921: Higher-ranked trait bounds for where clauses r=flodiebold a=Veykril

There is a slight problem with this which is also noted in a FIXME now but `LifetimeParameters` of these ForLifetime where clauses allocate the lifetimes in the corresponding arena as if they were lifetimes of the item itself and not just the clause they belong to. I wasn't entirely sure what I could do about this but given nothing really uses lifetimes like that currently I figured it might be fine? Open to suggestions for that problem.

Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
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bors[bot] 2020-12-20 11:47:01 +00:00 • committed by GitHub
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crates/hir/src/code_model.rs
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@ -1268,7 +1268,6 @@ impl LifetimeParam {
}
}
// FIXME: rename from `ImplDef` to `Impl`
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct Impl {
pub(crate) id: ImplId,