syntax_data: {"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let expr_place = scrutinee.try_to_place(self);
context_before:             DeclareLetBindings::Yes => {
context_after:                 let opt_expr_place = expr_place.as_ref().map(|place| (Some(place), expr_span));