syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"Self::reg"}]}
source_snippet:             Self::reg => Some(('x', "x0", 64).into()),
context_before:         match self {
context_after:             Self::vreg | Self::vreg_low16 => Some(('v', "v0", 128).into()),