I'm writing a recursive function that iterates through every primitive field in a struct.
I need to be able to support fields that are structs, pointers to structs, fields, and pointers to fields.
I've tried doing something like this, where for each field, I first do a check if it's a pointer. If it is, I switch on the type of that instead of just the field itself.
//Get reflect values and types
valOf := reflect.ValueOf(dest).Elem()
typeOf := valOf.Type()
//Iterate through each field
for i := 0; i < valOf.NumField(); i++ {
var fieldValDeref reflect.Value
//Get reflect value and type of single field
fieldVal := valOf.Field(i)
fieldTyp := typeOf.Field(i)
//Check if field is a pointer. If so, dereference and switch on dereferenced type
if fieldVal.Kind() == reflect.Ptr {
fieldValDeref = fieldVal.Elem()
} else {
fieldValDeref = fieldVal
}
switch fieldValDeref.Kind() {
case reflect.Array, reflect.Chan, reflect.Interface, reflect.Func, reflect.Map, reflect.UnsafePointer:
return errors.New("invalid destination field: " + fieldTyp.Name)
case reflect.Struct:
//Recursive call
break
default:
//Perform Action on Field
..................................
The issue I'm getting with this, is that the type of any pointer, struct or not, after calling .Elem()
is reflect.Invalid
.
How can I first dereference a field (if it is a pointer) and then perform actions accordingly, whether the field is a struct or a primitive?
Thanks
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