import type { MessageOrError } from "./error-from-message.js";
/**
 * Check whether the given value is not just numeric, but is
 * also an integer.
 */
export declare const isInt: (obj: unknown) => obj is number;
/**
 * Throw if the given value is not an integer.
 */
export declare function assertInt(value: unknown, messageOrError: MessageOrError): asserts value is number;
/**
 * Coerce a value's type to a number, throwing if it's not an integer.
 */
export declare const expectInt: (obj: unknown, messageOrError: MessageOrError) => number;
/**
 * Convert to an integer, if it seems like it could be done safely.
 * See {@link https://en.wikipedia.org/wiki/Decimal_separator | decimal separator on Wikipedia}
 * for details on how this is probably very wrong in many countries.
 */
export declare const maybeInt: (text: string) => number | undefined;
export type Digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9";
export declare const isDigit: (value: unknown) => value is Digit;
export type HexDigit = Digit | "A" | "B" | "C" | "D" | "E" | "F" | "a" | "b" | "c" | "d" | "e" | "f";
export declare const isHexDigit: (value: unknown) => value is HexDigit;
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