Custom decorator macro

[kogratte]

Hello guys!

Thank you for this lib, you cannot imagine my face once I discovered raw ts macro where evaluated at runtime!

I'm in need for something I cannot find how to achieve.

Lets consider the following class:

export class Foo extends x {
  constructor() {
    super();
  }

  doSomething() {
  }
}

What I want to do, is to be able to write something like that:

export class Foo extends x {
  constructor() {
    super();
  }

  @bind('channelName')
  doSomething() {
  }
}

Theoretically, it should be transformed at build time like this:

export class Foo extends x {
  constructor() {
    super();

    bindingManager.on('channelName', this.doSomething);
  }

  doSomething() {
  }
}

I tried a lot of things, but I'm not used to the typescript API, and I couldn't find how to impact the constructor as intended.

So far, my custom macro looks like:

[GoogleFeud]

Hi, this can be done with a decorator macro that's applied to the entire class, and then going through each method and checking if there is a bind decorator on it. Here's a working example

And here is the code with type annotations cause I had to cut those out.

[kogratte]

Thank you very much for your reply! I wasn't unfortunately able to make it work the way I want, but it will undoubtedly serve future purposes. For the record, here is how I finally deal with this scenario: import "reflect-metadata"; class A { @Reflect.metadata("foo", "bar") foo() {} } const a = new A(); doSomethingWithDecoratedMethods(a); function doSomethingWithDecoratedMethods(instance: any) { const propertyNames = Object.getOwnPropertyNames( Object.getPrototypeOf(instance) ); for (const propertyName of propertyNames) { if (typeof instance[propertyName] === 'function') { const metavalue = Reflect.getMetadata( "foo", instance, propertyName ); if (metavalue !== undefined) { // Do something with metavalue, instance, propertyName } } } } Le jeu. 30 janv. 2025 à 19:56, Volen ***@***.***> a écrit :

…

Hi, this can be done with a decorator macro that's applied *to the entire class*, and then going through each method and checking if there is a bind decorator on it. Here's a working example <https://googlefeud.github.io/ts-macros/?code=GYVwdgxgLglg9mABAEgIYAd0BsCeAhGMAEwAoBKALkQFEBbdKHAEQFMI4AnVKTxAbwBQiYYg4soIDkmTIuAdwCEJEtAAeZRAF4AfPyEiDAekOIAKgAsWiKKg4BzcYhgBna5cQswsMYghZUzs76BsLsYM5Q1rYOkZq+UKoAdFDmLgCyqBAccMnR4gDcwSFhEYi04uZwRATErnEA2gC6hSEiJZFgLHJpLLQARiwcdVH24onl-YPO4xjKEwMcGjp6ra3GiACSwG5W84NOrqhlFVWIRGz+XLAIibdFq07bKgnJ0+knRKx+ttzwYCR7RYaQQPB7tRB9QhEDJZOAAYVQWCwWmOkw44yqMGAMCmAH5EtjiCR7qDWgCltoSaSwS8oG9nF9ONxOOTEAAyNlU6mtNSvRIuBFI6iqdBiQJ-AGJFgisXOP4aDlc7kGWhSmUscU3aWijVym4xUzSqDkLSaOIAIkhxHNStWZBayuE6wAgsRHjsfC5EEdzuwrvsIIisCwiIhLVCbY6nSY5FYxLQ4AA3KwpKy+plQfaoN2oIih1OIUCQa5gW1rEw8M5wHZh8opKo1IjOc3ejhcHBlkJYxAkK3QzLZQVYYGdsEIUqBoUilF9mGDoNqnWasAOqMiOuVapQ6boEDOcwkeqj6mTrDC9CJaIgcpeZz1AAMjQANMfSYDEmBUOUX2uDI17a+IRiBIUjxEkdIEpkPAcDgiQgOgRDcCwPT1p8Fw-CWxK-qsgI-thITvgmRBYjiQz4tiWCZhwcwUogCi8hBLiMlcLK0GQZB4fh669Asl4RIMLgANamHAgmeJxXGorxn7foBDzvgAjiAGoliJYlgBJXHvow6AsAACj8dZTJp+HvughniMZck4TxgzJDgukmdh759FUHZcQBa4AL4eFgzhxuIkhIICq6gj5LB+QFIHBbZHChQYXmeas6xwuOUAcCA0Der4aUZdAvCuUQOCIHIMApDW2qyn8rhyKkEDmFy6x9hVya3ly4KdHIqXhOlmXQXgbkohuDbbjM6DKPULCtVAT6FmA-5aJS3K8sAUGcLBWQsEh55VQgADKNiZjexqASta0wYkm1IUOO26hK1mhC8q35RdV2Znp2S6RwjDOhAEC6rdy5YZJj1JM90EbWISEbOcXgkYMJDhsQhB2Bkn4OBw5ocQ9xRPedkNbZmMOeLA2II+aCBYzj2NceA5yEiGTnKkeIPCFNJNM2uZ0vQTSEfXAX0-X9APqkDOM0mD+OXVDmYWC45Cc-hwClqziA0-hjSAWQnbaw8SXlogv0SEGxWEvm7jtHl0HejmeZOEgBadYgERIcdQRjj1OU9VbnAbG6cSdT0aLTGbAAyARQH75yqDRi2dgx9LdREPscF8ly-Ag5JcvrXZPJbfW+-7ZqIAAtAAjLr1KB7F0zgPuWInVztIh1Lb0sEnvUvWnGH3bTxAsAzRCK6STTD6CCeQTz0uEyweBYHAECCSQnUdynA1FZXjqb6COcGBF-krCeaUeKoLiwGAdirwXHAotXwcs1G+cvVHnbNJ2d8LHeT-QVHjQohP4N1pwQQtdXK19u5XF7lGaUZ8UZXxemPAwdMB6EEZoBGBEQ4FgJeokcyXAjJDEQW0Zuk8IbTyQnPBeS8H7YVuIkEgGDz6X2wdBRIhUcD4hdkdEmrgAA+vDEBNHVrQ24K8WGcHXjgIhwh-w63iiILyjUTAADFCAm0QPBRCmYazfECCVMq5gaxO0BO7VYwEgpgT5IAi6mjrr+ECBAjO-xOw2FGDNFxeQoAYmImTMiBIYCUQRqyZY9ESFMTYBmVi7Ex6uJiB+L8LAYmePsrpAy+DLKEI8W4xIlgOBlVQA4OE-g9wajHh-KY2dQqJUKIogQvpLhWCLNAP4EIoQkGTlQZOKNKA0HoIwZizI4oCAEAAATQJgXAjYlDa21JwSIujXDKLgNWI0ngmw0DbLwEEXtk7XxNNs4Qzh4IIxziUOAwZEjzzsCQMuAAmAAzElWpwgRl9kRvVbMnQsAADkElU2EEQOAe04AbhRvskkZyLlXMRkwaszgQUVBRv8xAzzECvLaeafyYQiDUGmsirFCBoQfHBTycc5yWCXLgNc80e0IlumGkQZFijFFAA> And here <https://pastebin.com/GWW1Sm2k> is the code with type annotations cause I had to cut those out. — Reply to this email directly, view it on GitHub <#94 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAORHVMQUPBZJ5PW7IUIZGL2NJYVFAVCNFSM6AAAAABWFB5QLSVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMBRGAZTGOI> . You are receiving this because you authored the thread.Message ID: ***@***.***>