syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // Assemble the initial list of candidates. These top-level candidates are 1:1 with the
context_before:     ) -> BuiltMatchTree<'tcx> {
context_after:         // input patterns, but other parts of match lowering also introduce subcandidates (for