syntax_data: {"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let user_ty = self.user_args_applied_to_res(expr.hir_id, res);
context_before:             | Res::SelfCtor(_) => {
context_after:                 ExprKind::ZstLiteral { user_ty }