From: Jimmy Yuen Ho Wong <wyuenho@gmail.com>
To: 63810@debbugs.gnu.org
Subject: bug#63810: 29.0.91; typescript-ts-mode grammar missing the "is" keyword
Date: Wed, 31 May 2023 08:30:14 +0100 [thread overview]
Message-ID: <m2353dj6ux.fsf@MobileCat.localdomain> (raw)
Reproduction:
1. C-x C-f test.ts
2. Insert
```typescript
function isFish(pet: Fish | Bird): pet is Fish {
return (pet as Fish).swim !== undefined;
}
```
3. Observe the `is` keyword isn't highlighted.
Expectation:
TypeScript has a concept called type predicates, which introduces a
keyword called `is`.
[Reference](https://www.typescriptlang.org/docs/handbook/2/narrowing.html#using-type-predicates)
next reply other threads:[~2023-05-31 7:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-31 7:30 Jimmy Yuen Ho Wong [this message]
2023-05-31 12:21 ` bug#63810: 29.0.91; typescript-ts-mode grammar missing the "is" keyword Eli Zaretskii
2023-05-31 13:20 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-05-31 18:51 ` Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-06-01 11:58 ` Eli Zaretskii
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