Golang：“无法扫描类型”错误

Suppose that I have a struct d of some type Data. In Golang, I can easily marshall it to a string it using:

marshalled := fmt.Sprintf("%v", d)

but if I try to unmarshall it like this:

fmt.Sscanf(marshalled, "%v", &d)

I get an error:

can't scan type: *Data

Question: How can I parse a string to my struct without writing a custom Lexer/Parser? I'd prefer not to use encoding/json too.