{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
/// the desugaring to if-let. Only let-else supports the type annotation at present.
/// In an `if let`, imagine it as `if (let <pat> = <expr>) { ... }`; in a let-else, it is part of
#[derive(Debug, Clone, Copy, HashStable_Generic)]