ast

Prettier 2.4.1
[Playground link](https://prettier.io/playground/#N4Igxg9gdgLgprEAuEAdKABAZhATgdwENcATAAgHIcIA6AZzDrorPwEsYALMgCnTLIASSAFsADtAQw6SMrjgkANOgCUAbnQhFICGJhtodZKGK4I+AArEERlIQA2RAJ5HtAI1yEwAazgwAyoQicAAybFBwyFgOdHDunj5+-mJe4QDmyDC4AK5xIHAibgokCiGEUGnZhGlwAGJ4IoQw+hXIIITZMBBaIJwwIvYA6pwccHQpYHD+NhxsAG4cTm2MriDhsbgwFp5pjVExeQBWdAAe-un2cACK2RDw+-ax2im4G20MTD1iuOEwg2wkLjIAAcAAZnmZYoNPG

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• Would you like to work on a fix?

How are you using Babel?

Programmatic API (babel.transform, babel.parse)

Input code

(async function () {
  function f(_=()=>null) {}
  await null;
});

or

(function* () {
  function f(_=()=>null) {}
  yield;
});

Configuration file name

package.json

Configuration

_No respon

Is your feature request related to a problem? Please describe.

No MappedTypeNode definition in ts-morph.
No TypeQueryNode definition in ts-morph.
No TypeOperatorNode definition in ts-morph.

And, ideally, a configurable list of annotations denoting generated source or AST structures.

See #105 for the kind of issue this seeks to avoid, and the limitations of this fix.