auto_enums_derive 0.3.3

This library provides an attribute macro like a wrapper of `#[derive]`, implementing the supported traits and passing unsupported traits to `#[derive]`.
Documentation 
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use proc_macro2::TokenStream;
use quote::quote;

use crate::utils::*;

pub(crate) const NAME: &[&str] = &["Index"];

pub(crate) fn derive(data: &Data) -> Result<TokenStream> {
    let root = std_root();
    let ops = quote!(#root::ops);

    #[cfg(not(feature = "unsized_locals"))]
    let bounds = TokenStream::new();
    #[cfg(feature = "unsized_locals")]
    let bounds = quote!(: ?Sized);

    derive_trait!(
        data,
        parse_quote!(#ops::Index)?,
        parse_quote! {
            trait Index<__Idx #bounds> {
                type Output;
                #[inline]
                fn index(&self, index: __Idx) -> &Self::Output;
            }
        }?,
    )
}