collectToChannel

// parser with recursive call
suspend fun simpleParser(ch: Channel<Char>, nest: Int=0 ) {
	while (true) {
		when (val a = ch.receiveOrNull()) {
			null, ']' -> break
			'[' -> simpleParser(ch, nest + 1 )
			else -> println("$nest $a")
		}
	}
}

// launch flow.collect() and send data to channel
suspend fun <T> Flow<T>.collectToChannel() = Channel<T>().apply {
	coroutineScope{
		launch {
			[email protected] { send(it) }
			close()
		}
	}
}

runBlocking {
	simpleParser(
		flowOf('a', '[', 'b', ']')
			.collectToChannel ()
	)
}