syntax_data: {"ast_node_type":"other","tokens":[{"end":25,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// match (x, y, z) {
context_before:     /// # fn foo((x, y, z): (bool, bool, bool)) -> u32 {
context_after:     ///     (true , _    , true ) => 0,