What are you trying to do? The behaviour of LimRange as you have it here is to return the float64 value of x if it is a float64, zero if it is another numerical type in the case list and NaN if it is none of those.
I would suggest you read https://golang.org/ref/spec#Switch_statements particularly Type Switches where it says ``` In clauses with a case listing exactly one type, the variable has that type; *otherwise, the variable has the type of the expression in the TypeSwitchGuard*. ``` This means that in the case as you have it below with `case int,int8,int16,int32,float32,float64:` the type of v must be the type of x, which is interface{}. You cannot convert interface{} to float64. On Wed, 2017-01-11 at 18:35 -0800, hui zhang wrote: > This is a compile error, so I don't think this matter > I modify the code , add float , it is the same. > > func LimRange(x, low, high interface{}) float64 { > var fx, flow, fhigh float64 > switch v := x.(type) { > case int: //OK > case int8: > case int16: > case int32: > case float32: > case float64: > return float64(v) //OK > > default: > return math.NaN() > } > > switch v := x.(type) { > case int,int8,int16,int32,float32,float64: > return float64(v) //Error: cannot convert v (type > interface {}) to type float64: need type assertion > default: > return math.NaN() > } > > a :=1 > switch a { > case 1,2: //OK > println("1,2") > } > > return math.Max(math.Min(fx, fhigh), flow) > } > > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
