/**
 * Check whether a character code is an ASCII control character.
 *
 * An **ASCII control** is a character in the inclusive range U+0000 NULL (NUL)
 * to U+001F (US), or U+007F (DEL).
 *
 * @param {Code} code
 *   Code.
 * @returns {boolean}
 *   Whether it matches.
 */
export function asciiControl(code: Code): boolean;
/**
 * Check whether a character code is a markdown line ending.
 *
 * A **markdown line ending** is the virtual characters M-0003 CARRIAGE RETURN
 * LINE FEED (CRLF), M-0004 LINE FEED (LF) and M-0005 CARRIAGE RETURN (CR).
 *
 * In micromark, the actual character U+000A LINE FEED (LF) and U+000D CARRIAGE
 * RETURN (CR) are replaced by these virtual characters depending on whether
 * they occurred together.
 *
 * @param {Code} code
 *   Code.
 * @returns {boolean}
 *   Whether it matches.
 */
export function markdownLineEnding(code: Code): boolean;
/**
 * Check whether a character code is a markdown line ending (see
 * `markdownLineEnding`) or markdown space (see `markdownSpace`).
 *
 * @param {Code} code
 *   Code.
 * @returns {boolean}
 *   Whether it matches.
 */
export function markdownLineEndingOrSpace(code: Code): boolean;
/**
 * Check whether a character code is a markdown space.
 *
 * A **markdown space** is the concrete character U+0020 SPACE (SP) and the
 * virtual characters M-0001 VIRTUAL SPACE (VS) and M-0002 HORIZONTAL TAB (HT).
 *
 * In micromark, the actual character U+0009 CHARACTER TABULATION (HT) is
 * replaced by one M-0002 HORIZONTAL TAB (HT) and between 0 and 3 M-0001 VIRTUAL
 * SPACE (VS) characters, depending on the column at which the tab occurred.
 *
 * @param {Code} code
 *   Code.
 * @returns {boolean}
 *   Whether it matches.
 */
export function markdownSpace(code: Code): boolean;
export function asciiAlpha(code: Code): boolean;
export function asciiAlphanumeric(code: Code): boolean;
export function asciiAtext(code: Code): boolean;
export function asciiDigit(code: Code): boolean;
export function asciiHexDigit(code: Code): boolean;
export function asciiPunctuation(code: Code): boolean;
export function unicodePunctuation(code: Code): boolean;
export function unicodeWhitespace(code: Code): boolean;
export type Code = import('micromark-util-types').Code;
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