{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"Avr(AvrInlineAsmRegClass::reg_upper)"}]}
            Avr(AvrInlineAsmRegClass::reg_upper) => "d",
            Avr(AvrInlineAsmRegClass::reg) => "r",
            Avr(AvrInlineAsmRegClass::reg_pair) => "r",