Class marked as unused when used in a static block

🔎 Search Terms

class unused static field block

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

https://www.typescriptlang.org/play?ts=5.5.0-dev.20240303#code/DYUwLgBAQsCu4AsD2SwBEQDcCWBjEA+rgE4gCGYIA3ALABQuwZAzs9HIiulniBAN70IEAMTYAJgEIAXBGZhi2AHYBzWnSFywFPKLLBgSAO4BhJEvnFYuSAF4IAM33Nq9TQAdFmCn1znL1mBIxAAUAJQCmsLYDhAhkjDwYMioGDj4AHQi+oam-gqBEYJ0wqUQycTGEEogRhAAosSVoQBEAJpIsBC4ZEpKqBDK8r1g2D7lCNhsjCxs4tikNsAAni1h6mUAvprbGiVaOriR+8KJnKk8+ESk4-YhErKWyioRtgB8x2WnHMlcabxZHLGMwWAo2CD2AquE6lPygiDiS58ew1OpnX4XdIgcIbL7olLcLGAgzA-JWcH2JzAFy4sqIolicQQwbiWmlUhgWDEJQIpFsza43aaFTgFnhT7s8BcnnJKZZCSC+hCuigSBkZkAJnU9HxfyR13IlBCLTIZDW2roIAAHu5gpB+JsgA

💻 Code

let BluethootDevice_create;
class BluethootDevice {
  #id!: string;

  static #allowConstruct = false;

  private constructor() {
    if (!BluethootDevice.#allowConstruct) {
      throw new Error("You cannot instantiate this class directly");
    }
  }

  static {
    BluethootDevice_create = (id: string) => {
      BluethootDevice.#allowConstruct = true;
      const device = new BluethootDevice();
      BluethootDevice.#allowConstruct = false;
      device.#id = id;
      return device;
    };
  }

  get id() {
    return this.#id;
  }
}

let a = 2;

BluethootDevice_create("aa");

export {}

🙁 Actual behavior

The class BluethootDevice is marked as unused, but it's used by the BluethootDevice_create function

🙂 Expected behavior

BluethootDevice should not be marked as unused

Additional information about the issue

No response

Inizia con la riproduzione collegata di TypeScript Playground e conferma che la classe venga segnalata come inutilizzata quando viene referenziata all’interno del suo blocco statico. Traccia la diagnostica dei simboli inutilizzati per questo pattern, quindi aggiungi la copertura per l’esempio e verifica che l’avviso di inutilizzo non venga più emesso.