# 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`:
```toml
[dependencies]
vtid = { version = "0.1.0", features = ["derive"] }
```
## 🛠️ Usage
Here's how to use `vtid` in your project:
```rust
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
```
## 📜 License
Licensed under either of
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.