syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"16"}]}
source_snippet:                 16 => Some(('x', "ax", 16).into()),
context_before:             Self::reg_abcd => match ty.size().bits() {
context_after:                 32 if arch == InlineAsmArch::X86_64 => Some(('e', "eax", 32).into()),