syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.with_let_source(LetSource::Else,"}]}
source_snippet:                     self.with_let_source(LetSource::Else, |this| {
context_before:                 if let Some(else_) = else_opt {
context_after:                         this.visit_expr(&this.thir[else_])