syntax_data: {"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let discr = self.parse_operand(*scrutinee)?;
context_before:             ExprKind::Match { scrutinee, arms, .. } => {
context_after:                 self.parse_match(arms, expr.span).map(|t| TerminatorKind::SwitchInt { discr, targets: t })