Class member incorrectly stripped from .d.ts output if @internal is mentioned in unrelated comment

🔎 Search Terms

internal, .d.ts, stripInternal

🕗 Version & Regression Information

This issue appears to be present in all version of TypeScript (tested down to 3.3.3).

⏯ Playground Link

https://www.typescriptlang.org/play?stripInternal=true&ts=5.3.3#code/KYDwDg9gTgLgBAYwDYEMDOa4DEITgbwCg44B6AKnOJPLgGUALCAVyQBM4AjYONGKAJZgwwNtTi0AAgIB2MYFBkok48qWpomrNgCFgdfkJEcAvHACMAbkLVSpOABUA8gBEnALjgBbFAE9u3igA1jwwDAKY0nIKSkgA-LaUqvRa7BIyEDC0AXyCwqKq6iSaLOwAcpl6BnnGcGYATNYAvkA

💻 Code

export class Foo {
  /**
   * Should be stripped
   * @internal
   */
  shouldBeStripped = 1;

  // TODO: maybe make this @internal?
  /**
   * Should *not* be stripped
   */
  shouldNotBeStripped = 2;
}

🙁 Actual behavior

The compiler should preserve the Foo.shouldNotBeStripped property while removing Foo.shouldBeStripped.

🙂 Expected behavior

Both Foo.shouldNotBeStripped and Foo.shouldBeStripped are removed.

Additional information about the issue

If a class member has an unrelated comment mentioning @internal preceding it, TypeScript will drop that member from the .d.ts output, even though that's not the intent since there's another comment after it. Only the first comment should be checked for @internal.

Riproduci il comportamento usando il TypeScript Playground collegato con stripInternal abilitato e la classe fornita. Traccia la gestione dell’output delle dichiarazioni per commenti consecutivi, quindi aggiungi un test di regressione che copra una menzione indipendente di @internal prima di un commento @internal separato. Il lavoro è completato quando viene omesso solo shouldBeStripped, mentre shouldNotBeStripped rimane nell’output .d.ts.