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| author | LingMan <LingMan@users.noreply.github.com> | 2020-10-11 20:52:48 +0200 |
|---|---|---|
| committer | LingMan <LingMan@users.noreply.github.com> | 2020-11-23 00:58:53 +0100 |
| commit | e0871cc0bedc9e7c6b0104600727a7109a2a0659 (patch) | |
| tree | 3453f122f614415a525c195deddb08ae79fbf34f /compiler/rustc_trait_selection | |
| parent | c643dd2ec8fed2852f5eee8f776d657293a6a8f2 (diff) | |
| download | rust-e0871cc0bedc9e7c6b0104600727a7109a2a0659.tar.gz rust-e0871cc0bedc9e7c6b0104600727a7109a2a0659.zip | |
Reduce boilerplate with the `?` operator
Diffstat (limited to 'compiler/rustc_trait_selection')
| -rw-r--r-- | compiler/rustc_trait_selection/src/traits/select/mod.rs | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs index 05ff9a6fb9c..e9e7e9520ee 100644 --- a/compiler/rustc_trait_selection/src/traits/select/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs @@ -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) } } |