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5
Question by _watcher_ · Jun 12, 2019 at 05:35 AM · ienumeratortypegenericarguments

Using the generic type 'IEnumerator' requires 1 type arguments

Hello,

So far i always used untyped IEnumerator, but as of late, im getting the above error using it. My implementation goes something like this:

 class MyClass : MonoBehaviour {
     void Awake () {
         StartCoroutine (Test());
     }
     private IEnumerator Test()
     {
         yield return null;
     }
 }

Which throws the error. Now if i use a Type there, like so:

 private IEnumerator<object> Test()
     {
         yield return null;
     }

..that works, but i will never ever want to return a non-null value, i will use this only to wait for next frame. Is there a better way to type a generic or is there a way to use untyped version (although when i think about it, the above is the same as the untyped version, isnt it)? Im basically looking for a BEST PRACTICE way to handle that specific use-case (only using it for yield return null as a delayed call or for staggered execution purpose), if anyone could chime in.

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Best Answer

Answer by Hellium · Jun 12, 2019 at 06:05 AM

You most likely forgot to add using System.Collections; at the top of your file....

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avatar image _watcher_ · Jun 29, 2019 at 05:06 AM 1
Share

In fact you are right. Thanks a lot, i'm quite surprised!

EDIT: to further explain what was going on: using System.Collections.Generic will use the generic IEnumerator, which requires a type. using System.Collections will use IEnumerator which does NOT require a type.

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