syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"Self::RiscV(_)"}]}
source_snippet:             Self::RiscV(_) => cb(self),
context_before:             Self::AArch64(_) => cb(self),
context_after:             Self::PowerPC(r) => r.overlapping_regs(|r| cb(Self::PowerPC(r))),