into_inner

A simple trait and derive macro for extracting the inner value from tuple structs (newtypes) with a single field.

Overview

The into_inner crate provides the IntoInner trait and a convenient #[derive(IntoInner)] macro for tuple structs with exactly one field. This allows you to easily extract the wrapped value from your newtypes without boilerplate.

Usage

Add this to your Cargo.toml:

[dependencies]
into_inner = "0.1"

Then, in your code:

use into_inner::IntoInner;

#[derive(IntoInner)]
struct MyWrapper(String);

let wrapper = MyWrapper("Hello, world!".to_string());
let inner = wrapper.into_inner();
assert_eq!(inner, "Hello, world!");

Features

Derive macro for tuple structs with a single field.
Compile-time errors for unsupported struct types.
No dependencies outside of proc-macro ecosystem.

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.

Contribution

Contributions are welcome! Please open issues or pull requests on GitLab.