syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // For the guard binding, take a shared reference to that reference.
context_before:                     self.cfg.push_assign(block, source_info, value_for_arm, rvalue);
context_after:                     let rvalue = Rvalue::Ref(re_erased, BorrowKind::Shared, value_for_arm);