Hi all,
In this code, the SetMapIndex line panics in Go <1.18, but it no longer
panics in Go 1.18:
type CustomString string
m := reflect.ValueOf(map[CustomString]int{})
m.SetMapIndex(reflect.ValueOf("key"), reflect.ValueOf(0))
The panic ("value of type string is not assignable to type CustomString")
appears to be prevented in Go 1.18 because reflect implicitly converts
string -> CustomString, which Go <1.18 doesn't do.
I had 2 questions:
- Is it possible to get this implicit conversion behavior in earlier
versions of Go? Specifically, I'm using Go 1.16 + the firestore package,
and I'd like to use custom string types as map keys.
- Is this change discussed anywhere?
Thanks!
David
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