[英]Go reflect.MakeFunc. How to return a err=nil as reflect.Value?
如何返回err = nil作为reflect.Value? 我需要编写一个可与reflect.MakeFunc()一起使用的交换函数。
//my swap implementation, that call the original function and cache results
func swapFunc(ins []reflect.Value) []reflect.Value {
//After cache the first return (Offer) of function FindBestOffer(int)(Offer,bool,error),
//i need to return the best Offer cached and default values
//for the two other returns (bool=true, err=nil)
outs := make([]reflect.Value, 3) //mock cache return
outs[0] = reflect.ValueOf(Offer{10, "cached offer", 20})
outs[1] = reflect.ValueOf(true)
outs[2] = reflect.ValueOf(nil).Elem() // --> Doesn't work!
return outs
}
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