Thanks. I've now tried that as follows:
fmt.Printf("@@@@@@: %T %v\n", field, field)
kind = field.Type().Elem().Kind()
fmt.Printf("######: %T %v\n", field, field)
In every case the output for kind before and after was identical.
(Naturally, I tried without the print statements too.) And, of course the
tests fail. So I'm _still_ using the awful hack!
On Wednesday, November 30, 2022 at 5:30:24 PM UTC bse...@computer.org wrote:
> On Wed, Nov 30, 2022 at 10:17 AM 'Mark' via golang-nuts <
> golan...@googlegroups.com> wrote:
>
>> Yes, I'd already tried that (that's what I started with) and
>> unfortunately it doesn't work.
>>
>
> It fails if field.Elem() is nil. Try this:
>
> kind = field.Type().Elem().Kind()
>
>
>>
>> On Wednesday, November 30, 2022 at 3:37:47 PM UTC bse...@computer.org
>> wrote:
>>
>>> On Wed, Nov 30, 2022 at 5:29 AM 'Mark' via golang-nuts <
>>> golan...@googlegroups.com> wrote:
>>>
>>>> I have this code which works but has a horrible hack:
>>>> ...
>>>> nullable := false
>>>> kind := field.Kind() // field's type is reflect.Value
>>>> if kind == reflect.Ptr {
>>>>
>>>
>>> This should work:
>>>
>>> kind = field.Elem().Kind()
>>>
>>>
>>>
>>>
>>>> // FIXME How can I improve upon this truly awful hack?
>>>> switch field.Type().String() {
>>>> case "*int", "*int8", "*uint8", "*int16", "*uint16", "*int32",
>>>> "*uint32", "*int64", "*uint64":
>>>> kind = reflect.Int
>>>> case "*float32", "*float64":
>>>> kind = reflect.Float64
>>>> }
>>>> nullable = true
>>>> }
>>>> switch kind {
>>>> case reflect.Bool:
>>>> out.WriteString("bool")
>>>> case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32,
>>>> reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16,
>>>> reflect.Uint32,
>>>> reflect.Uint64:
>>>> out.WriteString("int")
>>>> case reflect.Float32, reflect.Float64:
>>>> out.WriteString("real")
>>>> ...
>>>> if nullable {
>>>> out.WriteByte('?')
>>>> }
>>>> What is the correct way to achieve what I'm aiming for?
>>>>
>>>> --
>>>> 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...@googlegroups.com.
>>>> To view this discussion on the web visit
>>>> https://groups.google.com/d/msgid/golang-nuts/5ff4b6f6-405c-4ca5-9299-7c15e1d5c424n%40googlegroups.com
>>>>
>>>> <https://groups.google.com/d/msgid/golang-nuts/5ff4b6f6-405c-4ca5-9299-7c15e1d5c424n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>> --
>> 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...@googlegroups.com.
>>
> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/golang-nuts/c2d154f2-b425-4cc9-a015-af30f4dc9de2n%40googlegroups.com
>>
>> <https://groups.google.com/d/msgid/golang-nuts/c2d154f2-b425-4cc9-a015-af30f4dc9de2n%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>
--
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.
To view this discussion on the web visit
https://groups.google.com/d/msgid/golang-nuts/afa700de-926f-42b3-a2cd-18b9c1c12438n%40googlegroups.com.
