rust | Empowering everyone to build reliable and efficient software | Compiler library

 by   rust-lang Rust Version: 1.69.0 License: Non-SPDX

kandi X-RAY | rust Summary

kandi X-RAY | rust Summary

rust is a Rust library typically used in Utilities, Compiler applications. rust has no bugs, it has no vulnerabilities and it has medium support. However rust has a Non-SPDX License. You can download it from GitHub, GitLab.
This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

            kandi-support Support

              rust has a medium active ecosystem.
              It has 81910 star(s) with 10813 fork(s). There are 1487 watchers for this library.
              There were 9 major release(s) in the last 6 months.
              There are 8895 open issues and 39635 have been closed. On average issues are closed in 271 days. There are 656 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of rust is 1.69.0

            kandi-Quality Quality

              rust has 0 bugs and 0 code smells.

            kandi-Security Security

              rust has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              rust code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              rust has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              rust releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 9568 lines of code, 325 functions and 135 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

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            rust Key Features

            Empowering everyone to build reliable and efficient software.

            rust Examples and Code Snippets

            No Code Snippets are available at this moment for rust.

            Community Discussions


            Why is Rust NLL not working for multiple borrows in the same statement?
            Asked 2022-Apr-12 at 00:43

            First, I tried something like this:



            Answered 2022-Apr-12 at 00:43

            It is definitely an interesting one.

            They are similar - but not quite the same. resize() is a member of Vec. rotate_right(), on the other hand, is a method of slices.

            Vec derefs to [T], so most of the time this does not matter. But actually, while this call:



            Next failed to load SWC binary
            Asked 2022-Mar-22 at 05:46

            When trying to run the command using nextjs npm run dev shows error - failed to load SWC binary see more info here:

            I've tried uninstalling node and reinstalling it again with version 16.13 but without success, on the vercel page, but unsuccessful so far. Any tips?

            Also, I noticed it's a current issue on NextJS discussion page and it has to do with the new Rust-base compiler which is faster than Babel.



            Answered 2021-Nov-20 at 13:57

            This worked as suggeted by nextJS docs but it takes away Rust compiler and all its benefits... Here is what I did for those who eventually get stuck...

            Step 1. add this line or edit next.json.js



            Emulate BTreeMap::pop_last in stable Rust
            Asked 2022-Mar-15 at 16:55

            In the current stable Rust, is there a way to write a function equivalent to BTreeMap::pop_last?

            The best I could come up with is:



            Answered 2022-Mar-15 at 16:55

            Is there a way to work around this issue without imposing additional constraints on map key and value types?

            It doesn't appear doable in safe Rust, at least not with reasonable algorithmic complexity. (See Aiden4's answer for a solution that does it by re-building the whole map.)

            But if you're allowed to use unsafe, and if you're determined enough that you want to delve into it, this code could do it:



            Match ergonomics and & pattern
            Asked 2022-Mar-03 at 21:14

            Consider following code



            Answered 2022-Mar-03 at 21:14

            You are correct, this is due to match ergonomics. The first case should hopefully be self explanatory, but the second and third cases can be a bit counter-intuitive.

            In the second case:

            • (x,) is a non-reference pattern (see the second example in the RFC). The t tuple reference is dereferenced, and x is bound as a ref as it also is a non-reference pattern. Note that t.0 was a reference to begin with, thus resulting in x being a double reference.

            • (&y,) is also a non-reference pattern. The t tuple is dereferenced again to a (&i32,). However, &y is a reference pattern being matched to a &i32 reference. Hence y is bound with move mode and is an i32.

            In the third case:

            • Using the same reasoning as the second case, u is dereferenced via Deref coercion to an (i32,), and x, a non-reference pattern, is bound in ref mode. Hence x is an &i32.

            • Again with the same reasoning as the second case, u is dereferenced to an (i32,). The &y reference pattern is then matched to an i32, a non-reference, which causes an error.



            What is the built-in `#[main]` attribute?
            Asked 2022-Feb-15 at 23:57

            I have been using the #[tokio::main] macro in one of my programs. After importing main and using it unqualified, I encountered an unexpected error.



            Answered 2022-Feb-15 at 23:57

            #[main] is an old, unstable attribute that was mostly removed from the language in 1.53.0. However, the removal missed one line, with the result you see: the attribute had no effect, but it could be used on stable Rust without an error, and conflicted with imported attributes named main. This was a bug, not intended behaviour. It has been fixed as of nightly-2022-02-10 and 1.59.0-beta.8. Your example with use tokio::main; and #[main] can now run without error.

            Before it was removed, the unstable #[main] was used to specify the entry point of a program. Alex Crichton described the behaviour of it and related attributes in a 2016 comment on GitHub:

            Ah yes, we've got three entry points. I.. think this is how they work:

            • First, #[start], the receiver of int argc and char **argv. This is literally the symbol main (or what is called by that symbol generated in the compiler).
            • Next, there's #[lang = "start"]. If no #[start] exists in the crate graph then the compiler generates a main function that calls this. This functions receives argc/argv along with a third argument that is a function pointer to the #[main] function (defined below). Importantly, #[lang = "start"] can be located in a library. For example it's located in the standard library (libstd).
            • Finally, #[main], the main function for an executable. This is passed no arguments and is called by #[lang = "start"] (if it decides to). The standard library uses this to initialize itself and then call the Rust program. This, if not specified, defaults to fn main at the top.

            So to answer your question, this isn't the same as #[start]. To answer your other (possibly not yet asked) question, yes we have too many entry points.



            Difference between `cargo doc` and `cargo rustdoc`
            Asked 2022-Feb-15 at 14:32

            According to

            build[s] a package's documentation, using specified custom flags

            build[s] a package's documentation

            What is the difference between the two? From what I understand cargo rustdoc is just like cargo doc, but it allows for more lints—for instance:



            Answered 2022-Jan-11 at 21:00

            Their relationship is like between cargo build and cargo rustc: cargo doc performs all the usual work, for an entire workspace, including dependencies (by default). cargo rustdoc allows you to pass flags directly to rustdoc, and only works for a single crate.

            Here is the execution code for cargo rustdoc. Here is the code for cargo doc. The only differences is that cargo rustdoc always specify to not check dependencies while cargo doc allows you to choose (by default it does, but you can specify the flag --no-deps), and that cargo rustc allows you to pass flags directly to rustdoc with the flags after the --.



            Unable to specify `edition2021` in order to use unstable packages in Rust
            Asked 2022-Feb-02 at 07:05

            I want to run an example via Cargo but I am facing an error:



            Answered 2021-Dec-14 at 14:09

            Update the Rust to satisfy the new edition 2021.

            rustup default nightly && rustup update

            Thanks to @ken. Yes, you can use the stable channel too!

            But I love nightly personally.



            What is the idiomatic way to do something when an Option is either None, or the inner value meets some condition?
            Asked 2022-Jan-28 at 08:44

            Is there a more idiomatic way to express something like the following?



            Answered 2022-Jan-27 at 07:32

            There are many ways to do it. One of the simplest (and arguably most readable) is something like this:



            What is the official Rust guidance for interoperability with C++, in particular passing and returning structs as arguments?
            Asked 2022-Jan-26 at 23:08

            I'm trying to adapt some layers of existing C++ code to be used by Rust and apparently the way is through a C API.

            For example, one function might return a struct as an object



            Answered 2022-Jan-21 at 01:15

            extern "C" on both sides + #[repr(C)] on the Rust side + only using C-compatible types for interfacing between C++ and Rust, should work.

            Alternatively, see cxx and autocxx.



            Why does iteration over an inclusive range generate longer assembly in Rust?
            Asked 2022-Jan-15 at 11:19

            These two loops are equivalent in C++ and Rust:



            Answered 2022-Jan-12 at 10:20

            Overflow in the iterator state.

            The C++ version will loop forever when given a large enough input:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install rust

            Read "Installation" from The Book.


            If you’d like to build the documentation, it’s almost the same:. The generated documentation will appear under doc in the build directory for the ABI used. I.e., if the ABI was x86_64-pc-windows-msvc, the directory will be build\x86_64-pc-windows-msvc\doc.
            Find more information at:

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