JFC. When will open source projects like @rustlang learn that putting toxic people like this in positions of ANY authority is unacceptable. https://github.com/marshallpierce/rust-base64/issues/213 . He's showing you who he is, and you're not listening.

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https://crates.io/crates/syslog-ng-common/0.7.0

The colleague, who added @rustlang support to #syslog_ng left many years ago. Syslog-ng #Rust support was last touched 7 years ago. Still, there are regular downloads. Just #searchengines or there are real users? Does it actually work?

I'm working on a cli for a service I've made that maintains a node edge graph (think neo4j type thing). I want to be able to display a graph in the terminal in a sort of ascii art text form kinda like git log -graph. I haven't found any third part libraries that can do that and am looking for help.

Cross-posted to Reddit: https://www.reddit.com/r/rust/comments/162keij/transitioning_rrust_to_the_threadiverse/

From the release notes

Restore from-source serde_derive build on all platforms — eventually we'd like to use a first-class precompiled macro if such a thing becomes supported by cargo / crates.io

serde_derive now ships a precompiled binary. This made a lot of people angry. The crate maintainer finally locked the issue.

I recently ran into an issue where I wanted to use Any for slices. However, it only allows 'static types (based on what I read, this is because you get the same TypeId regardless of lifetimes).

I came up with this workaround which I think is safe:

use std::{
    any::{Any, TypeId},
    marker::PhantomData,
};

#[derive(Clone, Debug)]
pub struct AnySlice<'a> {
    tid: TypeId,
    len: usize,
    ptr: *const (),
    marker: PhantomData<&'a ()>,
}

impl<'a> AnySlice<'a> {
    pub fn from_slice(s: &'a [T]) -> Self {
        Self {
            len: s.len(),
            ptr: s.as_ptr() as *const (),
            tid: TypeId::of::(),
            marker: PhantomData,
        }
    }

    pub fn as_slice(&self) -> Option<&'a [T]> {
        if TypeId::of::() != self.tid {
            return None;
        }
        Some(unsafe { std::slice::from_raw_parts(self.ptr as *const T, self.len) })
    }

    pub fn is(&self) -> bool {
        TypeId::of::() == self.tid
    }
}

edit: Unfortunately it seems like Lemmy insists on mangling the code block. See the playground link below.

T: Any ensures T is also 'static. The lifetime is preserved with PhantomData. Here's a playground link with some simple tests and a mut version: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=3116a404c28317c46dbba6ed6824c8a9

It seems to pass Miri, including the mut version (which requires a bit more care to ensure there can only be one mutable reference). Any problems with doing this?

cross-posted from: https://programming.dev/post/1825728

Lots of new features!

Thought I should share this with those who don't use users.rust-lang.org. Note: I'm not affiliated with lib.rs, I'm only reposting to lemmy.

Cackle is a tool to analyse the transitive dependencies of your crate to see what kinds of APIs each crate uses.

The idea is look for crates that are using APIs that you don't think they should be using. For example a crate that from its description should just be doing some data processing, but is actually using network APIs.