syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"InlineAsmArch::X86_64"}]}
source_snippet:         InlineAsmArch::X86_64 => Ok(()),
context_before:         InlineAsmArch::X86 => Err("register is only available on x86_64"),
context_after:         _ => unreachable!(),