export type ArrayOrSingle<T> = T[] | T;
/**
 * Sequence of regex elements forming a regular expression.
 *
 * For developer convenience it also accepts a single element instead of array.
 */
export type RegexSequence = RegexElement[] | RegexElement;
/**
 * Fundamental building block of a regular expression, defined as either a regex construct, `RegExp` object or a string.
 */
export type RegexElement = RegexConstruct | RegExp | string;
/**
 * Fundamental building block of a regular expression, defined as either an encoded regex or a character class.
 */
export type RegexConstruct = EncodedRegex | LazyEncodableRegex;
/**
 * Encoded regex pattern with information about its type (atom, sequence)
 */
export interface EncodedRegex {
    precedence: EncodePrecedence;
    pattern: string;
}
export type EncodePrecedence = 'atom' | 'sequence' | 'disjunction';
export interface CharacterEscape extends EncodedRegex {
    chars: string[];
    ranges?: never;
}
export interface LazyEncodableRegex {
    encode: () => EncodedRegex;
}
export interface CharacterClass extends LazyEncodableRegex {
    chars: string[];
    ranges?: CharacterRange[];
}
export interface CharacterRange {
    start: string;
    end: string;
}
/**
 * Flags to be passed to RegExp constructor.
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/RegExp#flags
 */
export interface RegexFlags {
    /**
     * Find all matches in a string, instead of just the first one.
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/global
     */
    global?: boolean;
    /**
     * Perform case-insensitive matching.
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/ignoreCase
     */
    ignoreCase?: boolean;
    /**
     * Treat the start and end of each line in a string as the beginning and end of the string.
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/multiline
     */
    multiline?: boolean;
    /**
     * Generate the start and end indices of each captured group in a match.
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/hasIndices
     */
    hasIndices?: boolean;
    /**
     * MDN: _Allows . to match newlines._
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/dotAll
     */
    dotAll?: boolean;
    /**
     * MDN: _Matches only from the index indicated by the `lastIndex` property of this regular expression in the target string. Does not attempt to match from any later indexes._
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky
     */
    sticky?: boolean;
    /**
     * Enables [Unicode-aware mode](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicode#unicode-aware_mode).
     *
     * This enables features like:
     * - Unicode character escapes: `\u{xxxx}`
     * - Unicode character property escapes:`\p{Property=Value}`
     *
     * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicode
     */
    unicode?: boolean;
}