#prog #rust #rustlib

coffee_break

Nowadays, the devious Rust compiler developers are trying to make the compiler even faster, and they're slowly succeeding.

Here comes Coffee break, a friendly developer tool to make this problem go away.

Before you run cargo build, reward yourself with a coffee break:

use coffee_break::coffee_break;

fn work_stuff() {
    let maybe = |(true|false)||(false|true)||(true|false)|true;
    let absolutely = maybe(true)(true)(true);

    // Take a break and hit compile
    coffee_break!(5 minutes);
}

You just got 5 minutes to stretch your legs, get a coffee, or make Friday afternoon a bit nicer.

#prog #rust #rustlib

qualifier_attr — procedural macro attributes for adding "qualifiers" to various items.

// We can add a qualifier to a function
// with an attribute.
#[qualifiers(const)]
fn const_fn() -> u32 {
    42
}

const CONST_RES: u32 = const_fn();

// It's not so impressive on its own,
// but with `cfg_attr`, it can be conditional.
#[cfg_attr(
    feature = "extern_c",
    no_mangle,
    qualifiers(pub, extern "C")
)]
fn extern_c_fn() -> u32 {
    42
}