encoding/asn1 I can't Marshal a struct with pointer members

[J Liu]

My program is like this:

type Girl struct {
     Name string
     Age  int
 }

 type Person struct {
     girl *Girl

     job string
 }

What should I do to Marshal 'Person'?

[Jan Mercl]

I think you need to export the fields, the same way like the Girl struct have them exported, ie. by making the first character of the names upper case.

hth

[J Liu]

I understand this problem. My real program uses export correctly, but the problem I have is not export, asn1: structure error: unknown Go type: *pkg.Girl

[Def Ceb]

Most marshal/unmarshal functions are unwilling to marshal/unmarshal
structs with pointer fields. Changing them to direct values fixes this.
Example:
https://go.dev/play/p/ykmpBm0bXqn

I do not think there is any other simple alternative.
J Liu:

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[J Liu]

Thank you very much for your answer, but I cannot modify the definition of the field because this is the structure of the third-party library.

[Jason Phillips]

Then that type probably won't work with encoding/asn1.

If you have control over the call to asn1.Marshal, you could always create a "data transfer object" to translate between this third-party type and a type that you control that has a structure compatible with encoding/asn1.