Re: [go-nuts] [generics] Closure?
Ah, this is https://golang.org/issue/39654.
On Thursday, June 18, 2020 at 2:43:48 PM UTC-4 frave...@gmail.com wrote:
> I think this probably gets a little closer to what you were going for, but
> there's a puzzling error that leads me to think the parser doesn't quite
> understand the instantiation in the return type:
> https://go2goplay.golang.org/p/gcD609dr21E
>
>
>
> type Foo(type T) struct {}
>
> type FooFunc(type T) func() Foo(T)
>
> func bar(type T)() FooFunc(T) {
> return func() Foo(T) {
> return Foo(T){}
> }
> }
>
>
>
> Looks like someone else just posted that naming the return value is a
> workaround for this parser issue:
> https://go2goplay.golang.org/p/0Kdfj81Ot3B
>
>
>
> type Foo(type T) struct {}
>
> type FooFunc(type T) func() Foo(T)
>
> func bar(type T)() FooFunc(T) {
> return func() (_ Foo(T)) {
> return Foo(T){}
> }
> }
>
>
>
> > On Jun 18, 2020, at 2:17 PM, teiva...@gmail.com wrote:
> >
> > Hello,
> >
> > I didn't find in the latest draft design any mention of generics with
> closure and I'm struggling in having something working:
> >
> > type Foo(type T) struct {}
> >
> > func bar(type T)() Foo(T) {
> > return func() Foo(T) {
> > return Foo(T){}
> > }()
> > }
> >
> > In this example, how can I create a closure that would return a Foo(T)?
> >
> > Here is the playground: https://go2goplay.golang.org/p/N-b10vSCois
> >
> > Cheers
> >
> > --
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> Groups "golang-nuts" group.
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> .
>
>
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Re: [go-nuts] [generics] Closure?
I think this probably gets a little closer to what you were going for, but
there's a puzzling error that leads me to think the parser doesn't quite
understand the instantiation in the return type:
https://go2goplay.golang.org/p/gcD609dr21E
type Foo(type T) struct {}
type FooFunc(type T) func() Foo(T)
func bar(type T)() FooFunc(T) {
return func() Foo(T) {
return Foo(T){}
}
}
Looks like someone else just posted that naming the return value is a
workaround for this parser issue: https://go2goplay.golang.org/p/0Kdfj81Ot3B
type Foo(type T) struct {}
type FooFunc(type T) func() Foo(T)
func bar(type T)() FooFunc(T) {
return func() (_ Foo(T)) {
return Foo(T){}
}
}
> On Jun 18, 2020, at 2:17 PM, teivah@gmail.com wrote:
>
> Hello,
>
> I didn't find in the latest draft design any mention of generics with closure
> and I'm struggling in having something working:
>
> type Foo(type T) struct {}
>
> func bar(type T)() Foo(T) {
>return func() Foo(T) {
> return Foo(T){}
>}()
> }
>
> In this example, how can I create a closure that would return a Foo(T)?
>
> Here is the playground: https://go2goplay.golang.org/p/N-b10vSCois
>
> Cheers
>
> --
> You received this message because you are subscribed to the Google Groups
> "golang-nuts" group.
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[go-nuts] [generics] Closure?
Hello,
I didn't find in the latest draft design any mention of generics with
closure and I'm struggling in having something working:
type Foo(type T) struct {}
func bar(type T)() Foo(T) {
return func() Foo(T) {
return Foo(T){}
}()
}
In this example, how can I create a closure that would return a *Foo(T)*?
Here is the playground: https://go2goplay.golang.org/p/N-b10vSCois
Cheers
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