On Wed, 2017-01-11 at 17:15 -0800, hui zhang wrote:
> switch v := x.(type) {
> case int,int8,int16,int32:
What type is v here? It can't be any of the four types you have listed
in the case since are not assignable to each other without conversion,
so it must be an interface{}. interface{} cannot be converted to
float64 without an assertion to a numerical type first.
> return float64(v)
> default:
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