kandi X-RAY | rust-clippy Summary
kandi X-RAY | rust-clippy Summary
A bunch of lints to catch common mistakes and improve your Rust code
Top functions reviewed by kandi - BETA
rust-clippy Key Features
rust-clippy Examples and Code Snippets
Trending Discussions on rust-clippy
I have a test assertion that looks like this...
ANSWERAnswered 2021-Jan-24 at 19:03
Ok so I've copied and altered the assert_eq macro a bit
So I have this trait and a struct that implements it:...
ANSWERAnswered 2020-Oct-12 at 09:37
You can wrap a trait object in a
Rc as well, since
Rc is also a pointer.
Therefore if you have
Rc>, you have two allocations: One for the
T and one for the
Box (another pointer, that now is on the heap). Instead, use
Rc to only have one allocation.
rustup help toolchain lists the following sub-commands
ANSWERAnswered 2019-Oct-04 at 00:29
rustup default to change the default toolchain. You can use the full name (e.g.
rustup default stable-x86_64-unknown-linux-gnu) or a short alias (e.g.
rustup default stable).
rustup also has methods to override the default in a more scoped manner. See Override precedence in rustup's README.
I am checking Clippy findings in my code and found that the pedantic rule
needless_pass_by_value might be a false positive.
It says that:
warning: this argument is passed by value, but not consumed in the function body
help: consider taking a reference instead:
Since cloning the
Arc is only reference counting, moving the
Arc should not be bad idea. Does it really make any difference in terms of quality and performance to send a reference instead of a value for the
ANSWERAnswered 2019-Apr-08 at 15:18
arc_taker(arc.clone()) increments the reference count, and returning from
arc_taker decrements it again. This is useless in this case, since the
arc variable of
main already keeps the
Arc alive during the entire call. A reference to it would already suffice. No need to bump the reference count up and down.
In your specific example,
arc_taker doesn't even care that it is managed by an
Arc. All it cares about is that there is a
lock, so to make your function less restrictive, just take a
If you wanted to do any
Arc-specific things to it, like getting the
weak_count or something, taking a
&Arc<..> would make sense. If your function would keep a clone of the Arc around, only then it would make sense to take an
Arc by value, because then the caller can decide to give you an additional reference to it by calling
.clone() (thus bumping the reference count), or to give you ownership of its own
Arc (and thus not bumping the reference count).
I am getting some Clippy lints that look like this:...
ANSWERAnswered 2019-Mar-28 at 16:57
The docs state you can allow or deny lints.
Clippy warns about code like this:...
ANSWERAnswered 2018-Jun-30 at 02:30
Yes, these are the same to the compiler. In this case, there's not much benefit. The real benefit comes from the
How can I pass a reference to
Arc so that the following code compiles successfully?
ANSWERAnswered 2018-Feb-18 at 12:51
You can pass a reference to an
Arc's content instead.
cargo clippy, it complains about code like this:
ANSWERAnswered 2017-Jun-15 at 10:56
In a Cargo project, I can easily run clippy on my
src code using this command:
ANSWERAnswered 2017-Jan-05 at 13:55
There are two ways to use Clippy: the
cargo clippy command and the
clippy compiler plugin.
cargo clippy detects the build script as a dependency of the main project, so it doesn't load the compiler plugin.
Therefore, the other option is to use the compiler plugin directly. The instructions for doing this are in clippy's README. We need to make a few adaptations for using it on the build script, though.
First, we need to add
clippy as a build dependency:
No vulnerabilities reported
Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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