syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"check_matches!("}]}
source_snippet:                 check_matches!(
context_before:                 // Note that the `lp64e` is still unstable as it's not (yet) part of the ELF psABI.
context_after:                     &*self.llvm_abiname,