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Fix subst_prefix

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This commit is contained in:
Florian Diebold 2021-04-07 21:17:51 +02:00
parent 5794a090bf
commit dc0b581736
1 changed files with 4 additions and 1 deletions
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5
crates/hir_ty/src/lib.rs
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@ -110,7 +110,10 @@ pub type WhereClause = chalk_ir::WhereClause<Interner>;
// FIXME: get rid of this
pub fn subst_prefix(s: &Substitution, n: usize) -> Substitution {
Substitution::intern(s.interned()[..std::cmp::min(s.len(&Interner), n)].into())
Substitution::from_iter(
&Interner,
s.interned()[..std::cmp::min(s.len(&Interner), n)].iter().cloned(),
)
}
/// Return an index of a parameter in the generic type parameter list by it's id.