syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"Self::reg16"}]}
source_snippet:             Self::reg16 => types! { _: I8, I16; },
context_before:         match self {
context_after:             Self::reg32 => types! { _: I8, I16, I32, F32; },