anonymous return types

[Petar Maymounkov]

I can have a function

func f() struct{ a, b string }

that returns an anonymous type. But would I write the return
statement?

Thanks,
--P

[Petar Maymounkov]

I meant: How would I write the return statement?

[John Asmuth]

return struct{a,b string}{"hi","there"}

[bflm]

On Feb 26, 4:34 pm, Petar Maymounkov <pet...@gmail.com> wrote:
> I meant: How would I write the return statement?
>

> > I can have a function
>
> > func f() struct{ a, b string }
>
> > that returns an anonymous type. But would I write the return
> > statement?

e.g.:
func f() interface{} {
return struct{i int}{42}
}

[Petar Maymounkov]

Awesome. Thanks all. 

I didn't find this in the doc. Maybe needs updating.

—Petar

[Steven]

On Sat, Feb 26, 2011 at 10:44 AM, Petar Maymounkov <pe...@csail.mit.edu> wrote:

Awesome. Thanks all. 

I didn't find this in the doc. Maybe needs updating.

—Petar

 ? The return statement is properly documented. You just put "return <expression of return type(s)>", or just "return" if all your return values are named. In this case, you are using a composite literal for the return. You could have used a variable, say:

func f() struct{ a, b string } {

    var ret struct { a, b string }

    // ...

    return ret

} 

or named your return value

func f() struct (ret struct{ a, b string }) {

    ret.a = "mostly"

    ret.b = "harmless"

    return

}

When you say "the Go doc", you have read the go spec, right?

golang.org/doc/go_spec.html

[Petar Maymounkov]

Right.

Actually, it is probably the "Effective Go" that needs an example.

And the second example you give below is probably worth including 

as well since it potentially saves having to re-type the type def.

—Petar