syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"SplitInOut"}]}
source_snippet:                         SplitInOut { in_expr, out_expr, reg: _, late: _ } => {
context_before:                         | InOut { expr, reg: _, late: _ } => self.visit_expr(&self.thir()[*expr]),
context_after:                             self.visit_expr(&self.thir()[*in_expr]);