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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/client/consensus/babe/src/verification.rs
+2 -4
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@@ -71,10 +71,8 @@ pub(super) fn check_header<B: BlockT + Sized>(
let pre_digest = pre_digest.map(Ok).unwrap_or_else(|| find_pre_digest::<B>(&header))?;
trace!(target: "babe", "Checking header");
let seal = match header.digest_mut().pop() {
Some(x) => x,
None => return Err(babe_err(Error::HeaderUnsealed(header.hash()))),
};
let seal = header.digest_mut().pop()
.ok_or_else(|| babe_err(Error::HeaderUnsealed(header.hash())))?;
let sig = seal.as_babe_seal().ok_or_else(|| {
babe_err(Error::HeaderBadSeal(header.hash()))