syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"InlineAsmArch::X86_64"}]}
source_snippet:         InlineAsmArch::X86_64 => Err("high byte registers cannot be used as an operand on x86_64"),
context_before:     match arch {
context_after:         _ => Ok(()),