import * as p_di from "../../schema.js";
import { type Query_Result } from "../../interface/__internal/query/Query_Result.js";
export type Option<T extends p_di.Value> = readonly [string, T];
export declare function option<T extends p_di.Value, Output extends p_di.Value, Error extends p_di.Value>(option: Option<T>, $c: ($: T) => Query_Result<Output, Error>): Query_Result<Output, Error>;
export declare function exhaustive<Output extends p_di.Value, Error extends p_di.Value>(_x: never): Query_Result<Output, Error>;
export declare namespace decide {
    const optional: <T extends p_di.Value, Output extends p_di.Value, Error extends p_di.Value>(option: p_di.Optional_Value<T>, set: (output: T) => Query_Result<Output, Error>, not_set: () => Query_Result<Output, Error>) => Query_Result<Output, Error>;
    const state: <T extends p_di.State, Output extends p_di.Value, Error extends p_di.Value>(state: T, assign: (output: T) => Query_Result<Output, Error>) => Query_Result<Output, Error>;
}