feat(host): add object publication and dispatch

crates/wip-host/tests/ui/unimplemented_interface.rs

@@ -0,0 +1,22 @@
+use wip_host::{InterfaceRegistry, PublishedObject, WipObject};
+use wip_interface::{OperationResult, interface};
+use wip_protocol::ObjectId;
+
+#[interface]
+pub trait Search {
+    fn search(&self) -> OperationResult<String>;
+}
+
+struct Object;
+
+impl WipObject for Object {
+    fn id(&self) -> ObjectId {
+        ObjectId("object".into())
+    }
+}
+
+fn main() {
+    let mut registry = InterfaceRegistry::new();
+    let search = registry.register(SearchDefinition, None).unwrap();
+    let _published = PublishedObject::new(Object).expose(&search).unwrap();
+}

crates/wip-host/tests/ui/unimplemented_interface.stderr

@@ -0,0 +1,34 @@
+error[E0277]: the trait bound `Object: Search` is not satisfied
+  --> tests/ui/unimplemented_interface.rs:21:58
+   |
+21 |     let _published = PublishedObject::new(Object).expose(&search).unwrap();
+   |                                                   ------ ^^^^^^^ unsatisfied trait bound
+   |                                                   |
+   |                                                   required by a bound introduced by this call
+   |
+help: the trait `Search` is not implemented for `Object`
+  --> tests/ui/unimplemented_interface.rs:10:1
+   |
+10 | struct Object;
+   | ^^^^^^^^^^^^^
+help: this trait has no implementations, consider adding one
+  --> tests/ui/unimplemented_interface.rs:6:1
+   |
+ 6 | pub trait Search {
+   | ^^^^^^^^^^^^^^^^
+note: required for `SearchDefinition` to implement `InterfaceImplementation<Object>`
+  --> tests/ui/unimplemented_interface.rs:5:1
+   |
+ 5 | #[interface]
+   | ^^^^^^^^^^^^
+ 6 | pub trait Search {
+   |           ^^^^^^
+note: required by a bound in `PublishedObject::<T>::expose`
+  --> src/lib.rs
+   |
+   |     pub fn expose<D>(mut self, interface: &RegisteredInterface<D>) -> Result<Self, PublicationError>
+   |            ------ required by a bound in this associated function
+   |     where
+   |         D: InterfaceImplementation<T>,
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `PublishedObject::<T>::expose`
+   = note: this error originates in the attribute macro `interface` (in Nightly builds, run with -Z macro-backtrace for more info)