syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"hir::ExprKind::If(cond,"}]}
source_snippet:             hir::ExprKind::If(cond, then, else_opt) => ExprKind::If {
context_before:             },
context_after:                 if_then_scope: region::Scope {