/**
 * @typedef {import('hast').Doctype} Doctype
 * @typedef {import('hast').Parents} Parents
 *
 * @typedef {import('../index.js').State} State
 */

// Make VS code see references to the above types.
''

/**
 * Serialize a doctype.
 *
 * @param {Doctype} _1
 *   Node to handle.
 * @param {number | undefined} _2
 *   Index of `node` in `parent.
 * @param {Parents | undefined} _3
 *   Parent of `node`.
 * @param {State} state
 *   Info passed around about the current state.
 * @returns {string}
 *   Serialized node.
 */
export function doctype(_1, _2, _3, state) {
  return (
    '<!' +
    (state.settings.upperDoctype ? 'DOCTYPE' : 'doctype') +
    (state.settings.tightDoctype ? '' : ' ') +
    'html>'
  )
}