Crate label

Label

label is a library that can be used to create custom attributes for functions, through which you can list them and perform actions on them. Label uses no global state during the compilation process, to avoid incremental compilation breaking it.

Example

use label::create_label;

create_label!(fn test() -> ());

#[test::label]
fn my_fn()  {
   println!("Test!");
}

fn main() {
    println!("calling all 'test' label");
    // using iter you can go through all functions with this annotation.
    for i in test::iter() {
        i();
    }
}

Guarantees

It is not supported to rely on the on the ordering of test::iter() in any situation. However, it is guaranteed that once the order is set at the start of the application, it stays that way until the application is stopped.

Macros

create_label

Creates a new label.

Attribute Macros

ctor	Marks a function or static variable as a library/executable constructor. This uses OS-specific linker sections to call a specific function at load time.