{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"//"}]}
        // FIXME(const_traits): Remove this when `From::from` is constified.
        // FIXME: Consider arg expr's precedence to avoid parentheses.
        (ty::Bool, ty::Int(..) | ty::Uint(..)) if const_context.is_some() => (