How to detect a reflect.Value of nil ?

[christoph...@gmail.com]

I have a method that receives a reflect.Value as input argument.

When the method is given the argument reflect.ValueOf(nil), the methods Type(), IsNil(), or IsZero() panic. For instance, when I call the method IsZero() I see the panic message "panic: reflect: call of reflect.Value.IsZero on zero Value " :)

Is there a way to detect that the method was given a reflect.ValueOf(nil) ?

[Ian Lance Taylor]

https://pkg.go.dev/reflect#Value.IsValid

Ian

[Rob Pike]

I find this situation unsatisfactory. See https://github.com/golang/go/issues/51649 for my suggested fix.

-rob

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