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Simplify some Option / Result / ? operator patterns (#8653)

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* Simplify some Option / Result / ? operator patterns

When those match a combinator exactly.

Tool-aided by [comby-rust](https://github.com/huitseeker/comby-rust).

* adjust after review

* adjust post-review
This commit is contained in:
François Garillot
2021-04-23 09:36:10 -04:00
committed by GitHub
parent 541692c4a8
commit 052be8bbef
37 changed files with 77 additions and 188 deletions
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substrate/frame/grandpa/src/lib.rs
+2 -10
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@@ -518,21 +518,13 @@ impl<T: Config> Module<T> {
None
} else {
let session_index =
if let Some(session_id) = Self::session_for_set(set_id - 1) {
session_id
} else {
return Err(Error::<T>::InvalidEquivocationProof.into());
};
Self::session_for_set(set_id - 1).ok_or_else(|| Error::<T>::InvalidEquivocationProof)?;
Some(session_index)
};
let set_id_session_index =
if let Some(session_id) = Self::session_for_set(set_id) {
session_id
} else {
return Err(Error::<T>::InvalidEquivocationProof.into());
};
Self::session_for_set(set_id).ok_or_else(|| Error::<T>::InvalidEquivocationProof)?;
// check that the session id for the membership proof is within the
// bounds of the set id reported in the equivocation.