Dynamic Multi-Channel Multiplexing via Dynamic Runtime Reflection Select Cases

package main
 
import (
	"reflect"
)
 
type MultiResult struct {
	Index int
	Value any
	Ok    bool
}
 
func MultiplexChannels(chans []chan any) MultiResult {
	cases := make([]reflect.SelectCase, len(chans))
	for i, ch := range chans {
		cases[i] = reflect.SelectCase{
			Dir:  reflect.SelectRecv,
			Chan: reflect.ValueOf(ch),
		}
	}
	chosen, recv, ok := reflect.Select(cases)
	var val any
	if recv.IsValid() {
		val = recv.Interface()
	}
	return MultiResult{Index: chosen, Value: val, Ok: ok}
}