AppFlowy/shared-lib/flowy-core-data-model/src/macros.rs

#[macro_export]
macro_rules! impl_def_and_def_mut {
    ($target:ident, $item: ident) => {
        impl std::ops::Deref for $target {
            type Target = Vec<$item>;

            fn deref(&self) -> &Self::Target { &self.items }
        }
        impl std::ops::DerefMut for $target {
            fn deref_mut(&mut self) -> &mut Self::Target { &mut self.items }
        }

        impl $target {
            #[allow(dead_code)]
            pub fn into_inner(self) -> Vec<$item> { self.items }

            #[allow(dead_code)]
            pub fn push(&mut self, item: $item) {
                if self.items.contains(&item) {
                    log::error!("add duplicate item: {:?}", item);
                    return;
                }

                self.items.push(item);
            }

            #[allow(dead_code)]
            pub fn take_items(&mut self) -> Vec<$item> { std::mem::take(&mut self.items) }

            pub fn first_or_crash(&self) -> &$item { self.items.first().unwrap() }
        }
    };
}