groups does not exist in type KnownPattern<RegExpExecArray>

[tao-cumplido]

Describe the bug
I thought this library would be a nice fit for matching named capture groups. Unfortunately it complains that the property groups does not exist in type KnownPattern<RegExpExecArray>. RegExpExecArray extends from Array, maybe that's why it's not recognized correctly. When executed without TS the playground code runs fine and does actually match.

TypeScript playground with a minimal reproduction case

Example: Playground

Versions

• TypeScript version: 5.6.3
• ts-pattern version: 5.5.0

[tao-cumplido]

Just came up with a workaround, more readable with multiple paths too:

import { match, P } from "ts-pattern";

const re = /(?<a>.)/;

match(re.exec("a")?.groups)
  .with(P.nullish, () => 0)
  .with({ a: "a" }, () => 1);