fn parse_one()

in uniffi_macros/src/export/attributes.rs [178:208]

• 31 lines of code
• 5 McCabe index (conditional complexity)

    fn parse_one(input: ParseStream<'_>) -> syn::Result<Self> {
        let lookahead = input.lookahead1();
        if lookahead.peek(kw::Debug) {
            input.parse::<Option<kw::Debug>>()?;
            Ok(Self {
                traits: HashSet::from([UniffiTraitDiscriminants::Debug]),
            })
        } else if lookahead.peek(kw::Display) {
            input.parse::<Option<kw::Display>>()?;
            Ok(Self {
                traits: HashSet::from([UniffiTraitDiscriminants::Display]),
            })
        } else if lookahead.peek(kw::Hash) {
            input.parse::<Option<kw::Hash>>()?;
            Ok(Self {
                traits: HashSet::from([UniffiTraitDiscriminants::Hash]),
            })
        } else if lookahead.peek(kw::Eq) {
            input.parse::<Option<kw::Eq>>()?;
            Ok(Self {
                traits: HashSet::from([UniffiTraitDiscriminants::Eq]),
            })
        } else {
            Err(syn::Error::new(
                input.span(),
                format!(
                    "uniffi::export struct attributes must be builtin trait names; `{input}` is invalid"
                ),
            ))
        }
    }