https://github.com/mrgvsv/to_phantom

Convert generics to PhantomData in proc macros
https://github.com/mrgvsv/to_phantom

Last synced: 13 days ago
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Convert generics to PhantomData in proc macros

• Host: GitHub
• URL: https://github.com/mrgvsv/to_phantom
• Owner: MrGVSV
• License: other
• Created: 2023-04-28T03:17:12.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-04-28T03:20:38.000Z (over 1 year ago)
• Last Synced: 2024-12-13T00:53:30.320Z (about 1 month ago)
• Language: Rust
• Size: 7.81 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE-APACHE

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README

        
# `to_phantom`

[![Crates.io](https://img.shields.io/crates/v/to_phantom)](https://crates.io/crates/to_phantom)

[![Docs](https://img.shields.io/docsrs/to_phantom)](https://docs.rs/to_phantom/latest/to_phantom/)

[![License](https://img.shields.io/crates/l/to_phantom)](https://github.com/MrGVSV/to_phantom/blob/main/License.md)

Easily convert [`Generics`](https://docs.rs/syn/latest/syn/struct.Generics.html)

to [`PhantomData`](https://doc.rust-lang.org/core/marker/struct.PhantomData.html) in your proc macros.

This is useful for when creating custom types in a proc macro that use the generics from some other type.

The `PhantomData` allows those generics to exist on the type without needing dedicated fields using them.

```rust

use to_phantom::ToPhantom;

fn create_helper(input: DeriveInput) -> TokenStream {

    let generics = input.generics();

    let phantom = generics.to_phantom();

    quote! {

        pub struct MyHelperStruct #generics {

            phantom: #phantom,

        }

    }

}

```