export declare function eq<T>(valueC: T, message?: string): (value?: T, ctx?: unknown) => boolean;

export declare function gt<T>(valueC: T, message?: string): (value?: T, ctx?: unknown) => boolean;

export declare function gte<T>(valueC: T, message?: string): (value?: T, ctx?: unknown) => boolean;

export declare function notEmpty(
    message?: string
): (value?: string | unknown[], ctx?: unknown) => boolean;

export declare function isIn<T>(
    valueC: T[],
    message?: string
): (value?: T, ctx?: unknown) => boolean;

export declare function isUpper(message?: string): (value?: string, ctx?: unknown) => boolean;

export declare function isLower(message?: string): (value?: string, ctx?: unknown) => boolean;

export declare function isSimple(message?: string): (value?: string, ctx?: unknown) => boolean;

export declare function isEmail(message?: string): (value?: string, ctx?: unknown) => boolean;

export declare function isUrl(message?: string): (value?: string, ctx?: unknown) => boolean;

export declare function isRegex(
    regex: string,
    message?: string
): (value?: string, ctx?: unknown) => boolean;

export declare function stringGt(
    valueC: number,
    message?: string
): (value?: string, ctx?: unknown) => boolean;

export declare function stringLt(
    valueC: number,
    message?: string
): (value?: string, ctx?: unknown) => boolean;

export declare function stringEq(
    valueC: number,
    message?: string
): (value?: string, ctx?: unknown) => boolean;