syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"InlineAsmArch::X86_64"}]}
source_snippet:             InlineAsmArch::X86_64 => 'r',
context_before:             InlineAsmArch::X86 => 'e',
context_after:             _ => unreachable!(),