Rust: add extended canonical paths on enum variants

rust/schema/prelude.py

@@ -73,6 +73,20 @@ class Callable(AstNode):
     attrs: list["Attr"] | child
 
 
+class Addressable(AstNode):
+    """
+    Something that can be addressed by a path.
+
+    TODO: This does not yet include all possible cases.
+    """
+    extended_canonical_path: optional[string] | desc("""
+        Either a canonical path (see https://doc.rust-lang.org/reference/paths.html#canonical-paths),
+        or `{<block id>}::name` for addressable items defined in an anonymous block (and only
+        addressable there-in).
+    """) | rust.detach | ql.internal
+    crate_origin: optional[string] | desc("One of `rustc:<name>`, `repo:<repository>:<name>` or `lang:<name>`.") | rust.detach | ql.internal
+
+
 class Resolvable(AstNode):
     """
     Either a `Path`, or a `MethodCallExpr`.