auto_enums_derive 0.3.2

This library provides an attribute macro like a wrapper of `#[derive]`, implementing the supported traits and passing unsupported traits to `#[derive]`.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

use proc_macro2::TokenStream;
use quote::quote;

use crate::utils::*;

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

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

    derive_trait!(
        data,
        parse_quote!(#fmt::Write)?,
        parse_quote! {
            trait Write {
                #[inline]
                fn write_str(&mut self, s: &str) -> #fmt::Result;
                #[inline]
                fn write_char(&mut self, c: char) -> #fmt::Result;
                #[inline]
                fn write_fmt(&mut self, args: #fmt::Arguments<'_>) -> #fmt::Result;
            }
        }?,
    )
}