bjoernager/rust
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Reduce boilerplate with the ? operator

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This commit is contained in:
LingMan 2020-10-11 20:52:48 +02:00
parent c643dd2ec8
commit e0871cc0be
2 changed files with 9 additions and 17 deletions
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10
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -2364,13 +2364,9 @@ impl<'o, 'tcx> Iterator for TraitObligationStackList<'o, 'tcx> {
type Item = &'o TraitObligationStack<'o, 'tcx>;
fn next(&mut self) -> Option<&'o TraitObligationStack<'o, 'tcx>> {
match self.head {
Some(o) => {
*self = o.previous;
Some(o)
}
None => None,
}
let o = self.head?;
*self = o.previous;
Some(o)
}
}