I would expect the following code to print `int`, but it prints `main.go`,
which was quite a surprise for me:
```
package main
import (
"fmt"
)
type foo int
const (
_ foo = iota
a
)
func main() {
fmt.Printf("%T\n", a)
}
```
playground link: https://play.golang.org/p/8f8sUATRwm
On the other hand, if I change the first constant to an untyped constant,
the program prints what you would expect, this is `int`:
```
package main
import (
"fmt"
)
type foo int
const (
_ = iota
a
)
func main() {
fmt.Printf("%T\n", a)
}
```
playground link: https://play.golang.org/p/MtKkixq7aq
Can you help me explain this behaviour?
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