Q: At the moment, user-defined types cannot extend...
# javascriptn
natpryce
01/29/2019, 8:51 AMQ: At the moment, user-defined types cannot extend function types when compiling to the JS platform. Are there plans to remove that limitation?
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bashor
01/29/2019, 4:30 PMAt least we are going to investigate such a possibility for the new JS backend.
n
natpryce
01/29/2019, 4:42 PMThat would be great. I’ve got a bunch of libraries I’d like to make multiplatform, and this is one of the main hurdles
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bashor
01/29/2019, 6:36 PMFeel free to vote or subscribe to the issue https://youtrack.jetbrains.com/issue/KT-29580. And please share more info about your usecases?
bashor
01/29/2019, 6:37 PMMaybe we could help you to workaround your issues?
n
natpryce
01/29/2019, 7:43 PMI’ve developed the libraries for the JVM. Porting to JS is not possible without changing the API.
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josephivie
01/30/2019, 6:30 AMAn interesting note: The reflection APIs themselves require the ability to extend function types, so if the Kotlin team ever intends for there to be reflection for JS, either you will get your wish or the reflection API will change.
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bashor
02/01/2019, 3:35 AMI think reflection is not main case for this issue, we can support it for our stdlib and reflection and, actually, we do it.
bashor
02/01/2019, 3:36 AMBTW, Kotlin/JS supports some small subset of reflection API
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