/** Supported primitive values. */
export type Primitive = boolean | number | string | null;
/**
 * Returns whether `value` is a primitive, acts as type guard for `<T = Attribute>` through generic.
 * @param value
 */
export declare const isPrimitive: <T = Primitive>(value: unknown) => value is T;
/** Typeguard for boolean. */
export declare const isBool: (value: unknown) => value is boolean;
/** Typeguard for number. */
export declare const isNumber: (value: unknown) => value is number;
/** Typeguard for string. */
export declare const isString: (value: unknown) => value is string;
/** Typeguard for null. */
export declare const isNull: (value: unknown) => value is null;
/** Typeguard for undefined. */
export declare const isUndefined: (value: unknown) => value is undefined;