import { Eval } from "@tsplus/stdlib/io/Eval/definition";
export declare class GenEval<A> {
    readonly io: Eval<A>;
    readonly _A: () => A;
    constructor(io: Eval<A>);
    [Symbol.iterator](): Generator<GenEval<A>, A, any>;
}
/**
 * Generator
 * @tsplus static Eval.Ops gen
 * @tsplus location "@tsplus/stdlib/io/Eval/gen"
 */
export declare function gen<Eff extends GenEval<any>, AEff>(f: (i: {
    <A>(_: Eval<A>): GenEval<A>;
}) => Generator<Eff, AEff, any>): Eval<AEff>;
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