| 1 | use proc_macro2::TokenStream; |
|---|---|
| 2 | use quote::ToTokens; |
| 3 | |
| 4 | pub struct TokensOrDefault<'a, T: 'a>(pub &'a Option<T>); |
| 5 | |
| 6 | impl<'a, T> ToTokens for TokensOrDefault<'a, T> |
| 7 | where |
| 8 | T: ToTokens + Default, |
| 9 | { |
| 10 | fn to_tokens(&self, tokens: &mut TokenStream) { |
| 11 | match self.0 { |
| 12 | Some(t: &T) => t.to_tokens(tokens), |
| 13 | None => T::default().to_tokens(tokens), |
| 14 | } |
| 15 | } |
| 16 | } |
| 17 |