windows-bindgen 0.66.0

Code generator for Windows metadata
Documentation 
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use super::*;

pub struct DeriveWriter(BTreeSet<String>);

impl DeriveWriter {
    pub fn new(config: &Config, type_name: TypeName) -> Self {
        let mut derive = BTreeSet::new();
        derive.extend(config.derive.get(type_name));
        Self(derive)
    }

    pub fn extend<I, S>(&mut self, iter: I)
    where
        I: IntoIterator<Item = S>,
        S: AsRef<str> + ToString,
    {
        self.0.extend(iter.into_iter().map(|s| s.to_string()));
    }
}

impl ToTokens for DeriveWriter {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        if !self.0.is_empty() {
            let derive = self.0.iter().map(|derive| to_ident(derive));
            tokens.combine(quote! {
                #[derive(#(#derive),*)]
            })
        }
    }
}