Crate vtid

vtid - Volatile Type ID

A Rust library for generating volatile type IDs that change when a crate is recompiled.

🚀 Features

• Extended Type IDs: Generate extended type IDs that change with each crate recompilation.
• Derive Macro Support: Easily derive the HasVtid trait for your types.
• no_std Compatible: Use in embedded and other no_std environments.
• Minimal Dependencies: Zero dependencies, except for the derive macro.

📦 Installation

Add vtid to your Cargo.toml:

[dependencies]
vtid = { version = "0.1.0", features = ["derive"] }

🛠️ Usage

Here’s how to use vtid in your project:

use vtid::{Vtid, HasVtid};
 
// Derive HasVtid for your types
#[derive(HasVtid)]
struct MyType;
 
// Get the volatile type ID
let type_id = Vtid::of::<MyType>();
println!("Type ID: {:?}", type_id);
 
// IDs change when crate is recompiled
let id1 = Vtid::of::<MyType>();
 
// Restart the program.
let id2 = Vtid::of::<MyType>(); // Same as id1
 
// Recompile program, but this crate and deps are not changed, so rlib is reused.
let id3 = Vtid::of::<MyType>(); // Should be the same as id1
 
// After this crate recompilation...
let id4 = Vtid::of::<MyType>(); // Different from id1

Structs

• Vtid
  A type identifier that changes between compilations of the containing crate.