{"ast_node_type":"variable","tokens":[{"end":95,"kind":"keyword","start":0,"text":"let"}]}
        let lit = token::Lit::new(token::Bool, if value { kw::True } else { kw::False }, None);
    pub fn expr_bool(&self, span: Span, value: bool) -> P<ast::Expr> {
        self.expr(span, ast::ExprKind::Lit(lit))