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
0
votes
1 answer
Crate cannot find path
I am trying to use this crate to generate an ethereum address: https://docs.rs/ethkey/0.2.5/ethkey/
use ethkey::prelude::*;
fn main() {
let key = EthAccount::load_or_generate("~/", "passwd")
.expect("should load or generate new eth…
0xsegfault
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0
votes
1 answer
What to do when a dependency can be expensive to create?
I wrote a simple program to test Cloudflare's wirefilter, here is an example that works.
use wirefilter::{ExecutionContext, Scheme};
lazy_static::lazy_static! {
static ref SCHEME: Scheme = Scheme! {
port: Int
…
Jayson Reis
- 708
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- 14
0
votes
1 answer
Is there a problem with naming a crate containing the string ".rs"?
Could there be any future problem in naming a dependency .rs for example,
[dependencies]
gccjit.rs = { git = "https://github.com/swgillespie/gccjit.rs.git" }
In the above code, I use .rs for something which is not a Rust source code file. Is that…
Niklas Rosencrantz
- 25,640
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0
votes
1 answer
Why can I not add a main.rs to a crate's source code and import a struct?
Why can I not clone a git project, add a main.rs and import one of the structs? The compiler complains that the import is unknown and if I make it known it complains about the library file can't be compiled.
My…
Niklas Rosencrantz
- 25,640
- 75
- 229
- 424
0
votes
2 answers
How to do a subtraction between &ndarray::Array1 and &mut Array1?
I find it impossible to do a subtraction between an immutable array reference and a mutable one using the ndarray crate:
#[macro_use]
extern crate ndarray;
use ndarray::Array1;
fn main() {
let a: &Array1 = &array![3.0, 2.0, 1.0];
let…
asdetrefle
- 303
- 1
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- 14
0
votes
1 answer
How to include documentation for unique match cases in macros?
Is is possible to write documentation for individual match cases of an exported macro.
/// This macro does stuff // this works
#[macro_export]
macro_rules! macro{
/// Today it's time for cats // error: no rules expected the token `[`
(cat)…
lncr
- 826
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- 16
0
votes
0 answers
Method from RustCrypto's BlockCipherVarKey trait not taken into account
I am trying to use RustCrypto to instantiate a blowfish object. The new method is implemented by the BlockCipherVarKey trait in the block-cipher-trait crate.
Here is my minimal example:
extern crate block_cipher_trait;
use…
Bromind
- 1,065
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- 23
0
votes
1 answer
Can't use the conrod library in my Rust project: can't find crate piston_window
I'm new to Rust and I'm trying to open a window with the Conrod library, like they did in the canvas.rs example:
#[macro_use] extern crate conrod;
extern crate find_folder;
extern crate piston_window;
use conrod::{Canvas, Theme, Widget, color};
use…
Omegaspard
- 1,828
- 2
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- 52
0
votes
1 answer
How am I messing up these modules?
I'm trying to create a crate that has a library and one or more binaries. I've looked at Rust package with both a library and a binary? and the Rust book section on crates and modules but am still running into errors when I try and compile.
I've…
Camden Narzt
- 2,271
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- 42
0
votes
1 answer
Testing a custom crate
I've got this crate in/src/lib.rs which I'm trying to run tests on:
#![crate_type = "lib"]
#![crate_name = "mycrate"]
pub mod mycrate {
pub struct Struct {
field: i32,
}
impl Struct {
pub fn new(n: i32) -> Struct {
…
andrey
- 1,515
- 5
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- 39
0
votes
0 answers
Using items in submodules from `extern crate` in root module
My understanding is that extern crate foo; declarations in the root module are then importable in any submodule with use foo::bar. While this works in one submodule, it doesn't work in the other submodule. Any ideas why this might not work?
|---…
brandonchinn178
- 519
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- 20
0
votes
1 answer
Rust cargo cannot find postgres package
I have this in Cargo.toml
[dependencies.postgres]
git = "https://github.com/sfackler/rust-postgres.git"
This resulted in the following output, when running cargo build:
$ cargo build -u
Updating git repository…
bojangle
- 888
- 1
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- 14
-1
votes
0 answers
Rust compiler "Cant find crate" for Rand
I have searched Stackoverflow and the internet far and wide for an answer to my problem but have found no fix yet. I have written a program in rust using the crates 'rand' and 'matrix'. I have added both using cargo, and added the lines
extern crate…
Chuckster
- 69
- 1
- 4
-1
votes
1 answer
How can i change the version of a sub dependancy of a crate?
I'm trying to build some libraries using the wasm32-unknown-unknown and I get
error[E0433]: failed to resolve: use of undeclared crate or module `imp`
-->…
Costas Kirgoussios
- 107
- 7
-1
votes
1 answer
Does unreachable Rust code get compiled and included in the final binary?
I'm new to Rust and compiled languages in general. Does every crate I include as a dependency end up in the binary, even if I don't use a single function from that crate?
And if I use just a single function from a big library. Does the entire…
Cornelius Roemer
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- 1
- 24
- 55