all: split reusable components into workspace crates

src/utils/opt.rs

@@ -1,27 +0,0 @@
-use {crate::utils::clonecell::CloneCell, std::rc::Rc};
-
-pub struct Opt<T> {
-    t: CloneCell<Option<Rc<T>>>,
-}
-
-impl<T> Default for Opt<T> {
-    fn default() -> Self {
-        Self {
-            t: Default::default(),
-        }
-    }
-}
-
-impl<T> Opt<T> {
-    pub fn set(&self, t: Option<Rc<T>>) {
-        self.t.set(t);
-    }
-
-    pub fn get(&self) -> Option<Rc<T>> {
-        self.t.get()
-    }
-
-    pub fn is_none(&self) -> bool {
-        self.t.is_none()
-    }
-}