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
1
vote
0 answers
Can't find local crate specified in Cargo.toml even though main.rs exists
I am trying to understand how to use local crates. I have the same problem as specified in How to use a local unpublished crate?, but the answers do not solve my problem. File structure:
|--my_program
| |--Cargo.toml
| |--src
| …
David Fischermeier
- 23
- 6
1
vote
1 answer
Linking against binary crate
There's a crate I want to use as a library for some of my own code (speedtest-rs specifically, but it doesn't really matter). However, whenever I try to use this crate, the compiler doesn't want to play nice with it.
$ cargo build
Compiling…
ollien
- 4,418
- 9
- 35
- 58
1
vote
1 answer
Failed to build dotenv v0.15.0 - rust cargo
I'm facing a problem trying to build a project that uses this this crate.
I'm running inside the docker rust:1.44.0.
I have installed the nightly:
rustup toolchain install nightly
info: syncing channel updates for…
Rodolfo
- 1,091
- 3
- 13
- 35
1
vote
1 answer
How to initialize generic array with generic-array crate in rust?
I use the generic-array crate:
struct Foo> {
data: GenericArray
}
But it doesn't explain how to initialize value:
impl> Foo {
pub fn new() -> Self {
Self {
data: // What…
Narann
- 819
- 2
- 8
- 20
1
vote
0 answers
cargo install async-std fails
when In run "cargo install async-std" on Windows with latest rust 1.39 I get the following error message:
error: specified package 'async-std v1.0.1' has no binaries
How can I solve this?
Martin Bammer
- 537
- 7
- 19
1
vote
1 answer
Why does clap fail to compile when added to Cargo.toml?
Summary
I'm fairly new to Rust and decided to use it to port an existing project into it. I intended to use clap to handle CLI options, but I keep getting errors.
What do I need to do for clap to install correctly so that it's usable in my project…
code_dredd
- 5,915
- 1
- 25
- 53
1
vote
0 answers
Split main.rs into files that refer each other
I have the following structure:
|-- Cargo.toml
|-- src
| |-- file1.rs
| |-- file2.rs
| `-- main.rs
src/file1.rs
pub fn function1() {}
src/file2.rs
// ERROR (1): error[E0583]: file not found for module `file1`
// mod file1;
use…
fcracker79
- 1,118
- 13
- 26
1
vote
1 answer
Parsing a 50 digit integer from a csv file: ParseIntError { kind: Overflow }
What is the maximum number of digits that can be parsed as u128. I am encountering Err(ParseIntError { kind: Overflow }) while trying to parse 50 digit positive integer.
My error:
...
...
result: id 89…
Bussller
- 1,961
- 6
- 36
- 50
1
vote
1 answer
Rust lifetimes, data flows into other references
I wrote the following code that filters a stream of data which worked fine until I changed from parsing simple numbers to also have types that are bound to lifetimes like &str and &[u8].
use wirefilter::{ExecutionContext, Filter,…
Jayson Reis
- 708
- 5
- 14
1
vote
1 answer
How to use wirefilter over an infinite stream of data
I am writing a program to use wirefilter in order to filter data from an infinite stream.
But it seems that I cannot use a compiled ast in a loop because of lifetimes and when I try to compile, this is the output:
error: borrowed data cannot be…
Jayson Reis
- 708
- 5
- 14
1
vote
1 answer
Linker cc not found when cross-compiling simple crate on Travis CI
As part of one of my projects, I have to cross-compile a Rust crate from x86_64 to i686 on Linux. I'm currently using Travis CI for this, with a simple Hello World crate (the default binary crate). My Travis CI configuration for the relevant matrix…
Arnav Borborah
- 11,357
- 8
- 43
- 88
1
vote
0 answers
External dependency in Rust not loading from cargo run command
I am attempting to replicate code I found in a tutorial. I am using the following dependencies in my Cargo.toml file:
[dependencies]
iron = "0.5.1"
mime = "0.2.3"
router = "0.5.1"
urlencoded = "0.5.0"
I receive the following error message when I…
David Kamer
- 2,677
- 2
- 19
- 29
1
vote
0 answers
Use same struct across multiple test files
I have two test files located in the tests directory. Each test file contains a test function and a common struct. For example, they both contain:
#[macro_use] extern crate serde_derive;
#[derive(Deserialize)]
struct MyStructure {
a_value:…
jean553
- 621
- 10
- 29
1
vote
1 answer
Install unregistered crate with cargo
I have a crate (https://github.com/wilbertom/bichannels) that is not registered on crates.io. I would like to add it to my current crate, as a dependency. I've tried going into its directory (placed inside the outer crate) and running cargo install,…
Alexis Dumas
- 1,299
- 11
- 30
1
vote
1 answer
Why do I need to use an extra `::` prefix to access an imported struct?
In my lib.rs I wanted to do use std::fs::File.
Here is the example code:
use std::fs::File;
use std::io::Read;
impl Css {
pub fn save_result_to_file(file_to_save: String) {
println!("Saving output to {}", file_to_save);
let mut…
abdoe
- 359
- 1
- 4
- 11