Method ok_or_push

crates/derive-impl/src/util.rs:671–679

(&mut self, r: Result<T>)

    }

    fn ok_or_push<T>(&mut self, r: Result<T>) -> Option<T> {
        match r {
            Ok(v) => Some(v),
            Err(e) => {
                self.push(e);
                None
            }
        }
    }
}

pub(crate) fn iter_use_idents<'a, F, R: 'a>(item_use: &'a syn::ItemUse, mut f: F) -> Result<Vec<R>>