syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:                         | Out { expr: Some(expr), reg: _, late: _ }
context_before:                         In { expr, reg: _ }
context_after:                         | InOut { expr, reg: _, late: _ } => self.visit_expr(&self.thir()[*expr]),