Crates are the unit of compilation in Rust.
Crates are the unit of compilation in rust, and the basic building block of its module system.
The crates can be published in crates.io, the official Rust packages registry, where you can browse them.
Questions tagged [rust-crates]
206 questions
3
votes
1 answer
UseDeclaration cannot find struct in the crate root
I start with the cargo new tst. Then in the src/lib.rs I have:
pub struct Config {}
And src/main.rs looks like the following:
use crate::Config;
fn main() {}
This however does not compile:
> cargo run
Compiling tst v0.1.0…
NarūnasK
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3
votes
1 answer
How can I use a trait implementation from another crate in the original crate?
I have a Rust project which divided among several crates in a workspace. One of these crates is a test crate which holds utilities for use in unit and integration tests within the other crates.
In one crate I define a trait that is implemented by a…
Wil
- 115
- 6
3
votes
1 answer
Can I publish a crate that uses a patch?
The section in the Rust documentation that talks about patching explains how to implement a patch, but all of the examples it uses are for "testing" and short term fixing. What I want to do is make a patch for one of the crates I depend on that…
Migwell
- 18,631
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3
votes
1 answer
Why can't Rust find the "js_sys" crate?
I'm new to rust. I'm trying to use the crate js_sys which contains a Math::log. I have included js_sys = 0.3.48 as the crate website tells me, and then use js_sys::Math::log; in main.rs. I get an error that rust cannot find the crate.
Steps to…
user11391572
3
votes
3 answers
Resolving imports in Rust
I'm having trouble with importing rand crate from crates.io. After adding the line rand="0.8.3" and then running command cargo build for the project, it keeps displaying the same errors:
error[E0432]: unresolved import `rand`
--> main.rs:1:5
|
1…
Nantarand
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- 4
3
votes
1 answer
Can we download something & set environment variable during crate installation?
As a Rust driver crate developer, I would like to perform below steps during my crate installation/download when used by any other Rust program:
Check the platform i.e. Windows or UNIX or macOS.
Download the corresponding platform-specific binary…
BINIT KUMAR
- 35
- 5
3
votes
1 answer
Where is my private code exposed as public?
I found out that I have some dead code in my code base but a not getting a dead code warning as expected. I read the Visibility and Privacy article from the rust book. I am following the example on creating a "helper module" with code to be used in…
cambunctious
- 8,391
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3
votes
2 answers
How to add external packages and run in rust compiler?
I am compiling and building an example program using rust. I chose rustc instead of cargo for compiling because it being a simple personal test project. So far using rustc for compiling and building executable worked fine but when I tried to add an…
Eka
- 14,170
- 38
- 128
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3
votes
1 answer
How to reuse code from the main bin in another bin?
My project structure looks like this:
.
├── Cargo.lock
├── Cargo.toml
└── src
├── bin
│ └── other.rs
├── main.rs
└── util.rs
(code: https://gitlab.com/msrd0/cargo-bin-import)
In my other.rs, I'm trying to reuse code from the util…
msrd0
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3
votes
1 answer
How do I add a constructor to an existing primitive type?
I am trying to make primitive types and object types by adding the new method to usize:
impl usize {
fn new(value: &u32) -> usize {
value as usize
}
}
I have no idea about what the message tries to say:
error[E0390]: only a single…
khanh
- 600
- 5
- 20
3
votes
1 answer
Importing non-root module from multiple non-root binaries
I am learning Rust and decided to write a simple client/server program. Both the client and the server will be using a very simple module I've already written. Knowing that this code might grow, I decided to compartmentalize my source for clarity.…
soplu
- 145
- 1
- 8
3
votes
0 answers
"Found staticlib instead of rlib or dylib" when compiling using Visual Studio
I'm using the image crate and Visual Studio with Rust plugin. The code is like this:
extern crate image;
When I use the command line cargo build, everything was fine. With the Visual Studio build I get
src\main.rs(4,1): error : found staticlib…
bitnick
- 1,903
- 3
- 16
- 22
2
votes
1 answer
Publish only the binary crate of a workspace
I have a project in the form of a Rust workspace with a dozen of crates, including only one binary crate, that I want to publish on crates.io.
I'd like to not publish the library crates that are only here as an attempt to separate concerns and…
Quessours
- 47
- 5
2
votes
1 answer
How to fix "updating crates.io index failed" problem when I build the Rust project
I have a problem building the Rust project.
I have changed the Cargo.toml like the following:
[package]
name = "here"
version = "0.1.0"
edition = "2021"
[dependencies]
rand="0.8.5"
Only added rand to dependencies.
But, when I build the project,…
multi422
- 61
- 1
- 10
2
votes
2 answers
How to tell the version number of the Rust crate I'm in?
Is there a robust way, maybe something in cargo CLI, to get the version of the crate?
I can grep on Cargo.toml, but I'm looking for something that won't break in 6 months.
Is there a better way?
SwimBikeRun
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