React-native: `Duplicate declaration of method 'resolver:rejecter:'` - Promises & Native Modules - RCT_REMAP_METHOD

[ferologics]

Error message: Duplicate declaration of method 'resolver:rejecter:'

RCT_REMAP_METHOD(get_data,
                 resolver:(RCTPromiseResolveBlock)resolve
                 rejecter:(RCTPromiseRejectBlock )reject)
{
  dispatch_group_wait(self.group, DISPATCH_TIME_FOREVER);
  [self compute_run_avg:^(NSMutableDictionary *result) {
    resolve(result);
  }];
}

RCT_REMAP_METHOD(send_count,
                 resolver:(RCTPromiseResolveBlock)resolve
                 rejecter:(RCTPromiseRejectBlock)reject)
{

}

Can I export only one method which uses promises?
Shouldn't the scope be limited to exported method?

if not

How can I reuse the method then?

thanks

[ide]

Name the methods get_data_resolver:rejecter: and send_count_resolver:rejecter:. The remap macro only sets up an alias to the method name you give it.

[ferologics]

I tried that twice. Xcode gave me a C99 error.

After I quit Xcode and restarted my computer your solution works. 🌵

Either way, is is not really a nice solution long term. It works but, I should be able to use ANY name I want within that method as with parameters in any and every other method. that's how I feel intuitively.

thinking that is maybe nonsense because I'm unfamiliar with macros and how they work under the hood. More of a Swifter...

thanks for explaining 💯 👍 ❤️

[ide]

You can use any name you want if you follow the rules of Objective-C. The macro defines an Objective-C method with the exact name that you give it.

[ferologics]

What I mean is - if the exported method name is different from some other exported method name it should not matter whether the parameters are named same or not. In obj-c it won't complain if you have same parameter names in 2 distinct methods. But clearly that's not the case here 😅

Need to learn about macros... If you know of a resource that explains macros in a simple way I'd be delighted to read it. 🏆

as always, thanks for finding the time to read and reply 💯

[ide]

I think you're misreading the macro. It's RCT_REMAP_METHOD(alias, method), not RCT_REMAP_METHOD(alias, parameters).

[xujialiang]

@ide thanks