import { TextColor } from "../tui-colors/style-builder";
import { Optional } from "./core";
import { SimpleReceiverFn, TruthyReceiverFn } from "./expression-lang-utils";
export declare abstract class Option<T> {
    readonly _isSome: boolean;
    constructor(value: T | undefined | null);
    isSome(): this is Some<T>;
    isNone(): this is None<T>;
    abstract toString(): string;
    static none: <T_1>() => None<T_1>;
    static some: <T_1 extends {}>(arg: T_1) => Some<T_1>;
    static create: <T_1>(arg: Optional<T_1>) => Option<T_1>;
}
export declare class None<T> extends Option<T> {
    constructor();
    toString(): string;
}
export declare class Some<T extends {}> extends Option<T> {
    readonly _value: T;
    constructor(value: T);
    toString(): string;
    get value(): T;
}
export declare const _callIfSome: <T>(context: Option<T>, receiver: TruthyReceiverFn<T>) => void;
export declare const _callIfNone: <T>(context: Option<T>, receiver: SimpleReceiverFn) => void;
export declare const DebugStyle: Readonly<{
    msgStyle: TextColor & import("..").FormatFn;
    argStyle: TextColor & import("..").FormatFn;
}>;
export declare function debug(msg: string, obj: any): any;