XML attribute with namespace

[chris.j...@gmail.com]

Lots of XML-based formats include an xml:lang attribute on various elements. Reading encoding/xml/typeinfo.go, it looks like this is supposed to work; but I don't see any tests for this functionality, and I can't get it to work in my own code. Here's an example:

package main

import (
    "fmt"
    "encoding/xml"
)

type foo struct {
    XMLName xml.Name `xml:"ns element"`
    Attr1 string `xml:"attr1,attr"`
    Lang string `xml:"xml lang,attr"`
}

func main() {
    f := &foo{XMLName:xml.Name{Space: "ns", Local: "element"}, Attr1: "val1", Lang: "en"}
    b, err := xml.Marshal(f)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(string(b))
}

I'm expecting it to print something with xml:lang="en", but it prints lang="en" instead. Is this something I'm doing wrong, or a bug in encoding/xml?

Chris

[Gustavo Niemeyer]

Hey Chris,

> I'm expecting it to print something with xml:lang="en", but it prints
> lang="en" instead. Is this something I'm doing wrong, or a bug in
> encoding/xml?

It's a known bug: http://golang.org/issue/3526

Sorry about that.

--
Gustavo Niemeyer
http://niemeyer.net
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-- I'm not absolutely sure of anything.

[chris.j...@gmail.com]

Thanks for your prompt reply, Gustavo.