{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
            // top-level expression-context path, so we can safely ignore it.
            // today's Rust this type of path *semantically* cannot appear as a
            if let [tt::TokenTree::Leaf(tt::Leaf::Punct(tt::Punct { char: '<', .. }))] =