Various progress, doesnt compile

Added prelude, made lambdas a single-token prefix like NS, made progress on implementations, removed const line type

orchid-extension/src/atom_owned.rs

@@ -23,7 +23,7 @@ use orchid_base::name::Sym;
 use crate::api;
 use crate::atom::{
 	AtomCard, AtomCtx, AtomDynfo, AtomFactory, Atomic, AtomicFeaturesImpl, AtomicVariant, MethodSet,
-	MethodSetBuilder, err_not_callable, err_not_command, get_info,
+	MethodSetBuilder, TypAtom, err_not_callable, err_not_command, get_info,
 };
 use crate::expr::Expr;
 use crate::gen_expr::{GExpr, bot};
@@ -68,6 +68,7 @@ impl Deref for AtomReadGuard<'_> {
 	fn deref(&self) -> &Self::Target { &**self.guard.get(&self.id).unwrap() }
 }
 
+/// Remove an atom from the store
 pub(crate) async fn take_atom(id: api::AtomId, ctx: &SysCtx) -> Box<dyn DynOwnedAtom> {
 	let mut g = ctx.get_or_default::<ObjStore>().objects.write().await;
 	g.remove(&id).unwrap_or_else(|| panic!("Received invalid atom ID: {}", id.0))
@@ -313,3 +314,11 @@ struct ObjStore {
 	objects: RwLock<MemoMap<api::AtomId, Box<dyn DynOwnedAtom>>>,
 }
 impl SysCtxEntry for ObjStore {}
+
+pub async fn get_own_instance<A: OwnedAtom>(typ: TypAtom<A>) -> A {
+	let ctx = typ.data.ctx();
+	let g = ctx.get_or_default::<ObjStore>().objects.read().await;
+	let dyn_atom = (g.get(&typ.data.atom.drop.expect("Owned atoms always have a drop ID")))
+		.expect("Atom ID invalid; atom type probably not owned by this crate");
+	dyn_atom.as_any_ref().downcast_ref().cloned().expect("The ID should imply a type as well")
+}