I've recently stumbled across code like this
https://go.dev/play/p/u3UER2ywRlr:
type clientContextKey struct{}
ctx := context.Background()
ctx = context.WithValue(ctx, clientContextKey{}, "foo")
_, ok := ctx.Value(clientContextKey{}).(string)
Naively, I had expected this to fail since I assumed that
clientContextKey{} would create a new variable instance every time it was
used and hence the keys would not match.
Why does this use of instantiating the struct type work here?
Thanks,
Andi
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