Since `ReceiveChannel<T>.onReceiveOrNull` ha...

# coroutines

[tseisel]

Since ReceiveChannel<T>.onReceiveOrNull has been deprecated, it is suggested to replace it with the onReceiveOrNull extension function.
But I find that it's surprisingly hard to use that function:

1. Since there is a member property onReceiveOrNull it takes precedence over the extension.
2. Since onReceiveOrNull is a function, the block passed as select clause is incorrectly interpreted as an extra lambda parameter.

While the following workaround code works:

import kotlinx.coroutines.channels.onReceiveOrNull as onReceiveOrNullExt

select {
    channel.onReceiveOrNullExt().invoke { foo ->
        [...]
    }

    anotherChannel.onReceive { bar ->
        [...]
    }
}

It is not as convenient as the original Select API.

Wouldn't it be better to convert that extension function to an extension property with a different name ?

[elizarov]

Thank for feedback. I’ve filed it here: https://github.com/Kotlin/kotlinx.coroutines/issues/1676