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Allow for nil tags #75

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Allow for nil tags #75

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18 changes: 15 additions & 3 deletions encoder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -104,9 +104,21 @@ func encodeStruct(structVal reflect.Value) ([]byte, error) {
name = fieldType.Name
}

p, err := encodeValue(fieldVal)
if err != nil {
return nil, err
var p []byte
var err error
// if the tag has the nilTag property, write it as '<nil/>'
if strings.HasSuffix(name, ",nilTag") && fieldVal.IsNil() {
p, err = []byte("<value><nil/></value>"), nil

name = strings.TrimSuffix(name, ",nilTag")
if name == "" {
name = fieldType.Name
}
} else {
p, err = encodeValue(fieldVal)
if err != nil {
return nil, err
}
}

b.WriteString("<member>")
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