import { Either } from "@fp-ts/data/Either";
import { Opt } from "@effect-ts-app/core/Option";
import type { Dictionary } from "@effect-ts/core/Collections/Immutable/Dictionary";
export * from "./utils/extend.js";
export declare const unsafeRight: <E, A>(ei: import("@fp-ts/data/Either").Either<E, A>) => A;
export declare const unsafeSome: (makeErrorMessage: () => string) => <A>(o: import("@fp-ts/data/Option").Option<A>) => A;
export declare function toString(v: unknown): string;
export declare const isTruthy: <T>(item: T | null | undefined) => item is T;
export declare const typedKeysOf: <T extends {}>(obj: T) => (keyof T)[];
export declare const typedValuesOf: <T extends {}>(obj: T) => ValueOf<T>[];
type ValueOf<T> = T[keyof T];
export type Constructor<T = any> = {
    new (...args: any[]): T;
};
export type ThenArg<T> = T extends Promise<infer U> ? U : T extends (...args: any[]) => Promise<infer V> ? V : T;
export declare function dropUndefined<A>(input: Dictionary<A | undefined>): Dictionary<A>;
type GetTag<T> = T extends {
    _tag: infer K;
} ? K : never;
export declare const isOfType: <T extends {
    _tag: string;
}>(tag: GetTag<T>) => (e: {
    _tag: string;
}) => e is T;
export declare function capitalize<T extends string>(string: T): Capitalize<T>;
export declare function uncapitalize<T extends string>(string: T): Uncapitalize<T>;
export declare function pretty(o: unknown): string;
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