Crate exclusive

Create exclusive contexts around your code that should not collide with other calls to exclusive!.

The exclusive! macro works by making a “unique” ID for each call site and using that ID to create a unique const declaration.

Purpose

This project was made to be used by static_assertions to prevent different assertions from colliding with the same identifier.

Usage

This crate is available on crates.io and can be used by adding the following to your project’s Cargo.toml:

[dependencies]
exclusive = "0.1"

and this to your crate root (main.rs or lib.rs):

#[macro_use]
extern crate exclusive;

Then, when calling the macro, you can place any code you want inside it!

exclusive! {
    let x = 20;
    let y = 30;
}

exclusive! {
    // This code doesn't actually run
    println!("Hello, world!");
}

With the nightly feature enabled, a const the identifier _ is used internally instead. This simply avoids having to generate a new identifier each time.

#![feature(underscore_const_names)]

exclusive! {
    // Do stuff here
}

exclusive! {
    // Do other stuff here
}

Macros

exclusive

Creates an exclusive context. 😎