syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"\"lp64\""}]}
source_snippet:                     "lp64" | "lp64f" | "lp64d" | "lp64e",
context_before:                     &*self.llvm_abiname,
context_after:                     "invalid RISC-V ABI name: {}",