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Moar linting: needless_borrow, let_unit_value, ...

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* There are a few needless borrows that don't seem to be needed. I even did a quick assembly comparison and posted a q to stackoveflow on it. See [here](https://stackoverflow.com/questions/74910196/advantages-of-pass-by-ref-val-with-impl-intoiteratoritem-impl-asrefstr)
* removed several `let _ = ...` when they don't look necessary (even a few ones that were not suggested by clippy (?))
* there were a few `then(|| ctor{})` that clippy suggested to replace with `then_some(ctor{})` -- seems reasonable?
* some unneeded assignment+return - keep the code a bit leaner
* a few `writeln!` instead of `write!`, or even consolidate write!
* a nice optimization to use `ch.is_ascii_digit` instead of `ch.is_digit(10)`
This commit is contained in:
Yuri Astrakhan 2022-12-24 16:09:08 -05:00
parent 2872e05589
commit d3dbf9c194
15 changed files with 22 additions and 26 deletions
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2
crates/proc-macro-test/build.rs
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@ -63,7 +63,7 @@ fn main() {
};
cmd.current_dir(&staging_dir)
.args(&["build", "-p", "proc-macro-test-impl", "--message-format", "json"])
.args(["build", "-p", "proc-macro-test-impl", "--message-format", "json"])
// Explicit override the target directory to avoid using the same one which the parent
// cargo is using, or we'll deadlock.
// This can happen when `CARGO_TARGET_DIR` is set or global config forces all cargo