Casting across types

[Sankar]

I have the following go code:

```

type A map[string]interface{}

type B map[string]interface{}

func f(a A) {

fmt.Println(a)

}

func main() {

var b B

b = make(map[string]interface{})

i := interface{}(b)

f(i.(A))

}

```

This code panics when I try to convert the B instance to type A. What is the right way to do the cast here ?

[Sankar P]

Playground url: https://play.golang.org/p/tDT7xCJJ_XN

திங்., 15 ஏப்., 2019, பிற்பகல் 4:01 அன்று, Sankar <sankar.c...@gmail.com> எழுதியது:

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Sankar P
http://psankar.blogspot.com

[roger peppe]

The dynamic type conversion needs to specify the exact type that was put into the interface (B in this case).

You can convert it back to A afterwards: https://play.golang.org/p/jBRtR_8RloC

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[Sankar P]

Thanks :)

திங்., 15 ஏப்., 2019, பிற்பகல் 4:20 அன்று, roger peppe <rogp...@gmail.com> எழுதியது:

[simon place]

may be missing the point, but why go thought an interface{}?

https://play.golang.org/p/Ol7e6UrNAWq