I don't understand the tradeoffs involved, so I can't speak to the hesitancy to release coroutines. They would probably be great fun to play with. I imagine, however, they would provide ample foot-guns too. Perhaps that is a part of the reason. I find reading coroutine code in Lua, for example, a fairly mind-boggling torture exercise.
On Sunday, February 23, 2025 at 12:52:58 AM UTC Nuno Cruces wrote: I wanted to implement this "push like" interface <https://pkg.go.dev/github.com/ncruces/go-sqlite3#AggregateFunction> with a "processor" function that accepts an iter.Seq and returns a result: func processor(seq iter.Seq[value]) result { ... } First using channels: *package mainfunc consumeAndSum(ch chan int) (sum int) { for i := range ch { println("consumer sees ", i) sum += i } println("consumer done.") return sum}func startProducer() chan int { ch := make(chan int) go func() { for i := range 3 { ch <- i } close(ch) println("producer exits.") }() return ch}func main() {* * ch := startProducer()* * sum := consumeAndSum(ch)* * println("all done. sum = ", sum)* *}* */* output:* *consumer sees 0* *consumer sees 1* *producer exits.* *consumer sees 2* *consumer done.* *all done. sum = 3 * **/* *Second using iter.Seq:* *package main* *import "iter"* *func consumeAndSum(it iter.Seq[int]) (sum int) { for i := range it { println("consumer sees ", i) sum += i } println("consumer done.") return sum}func startProducer() iter.Seq[int] { return func(yield func(int) bool) { for k := range 3 { if !yield(k) { return } } println("producer exits.") }}func main() { it := startProducer() sum := consumeAndSum(it) println("all done. sum = ", sum)}/* output:go run iter.goconsumer sees 0consumer sees 1consumer sees 2producer exits.consumer done.all done. sum = 3*/* -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/golang-nuts/6f090b16-ac52-4ea0-b5ea-1f7b3b7e6e7cn%40googlegroups.com.
