Converting Antlr parse tree to JSON in GO

[gish...@gmail.com]

Hi Guys, 

I am trying to replicate the following solution (https://stackoverflow.com/questions/49116223/convert-antlr-parse-tree-to-json) in Golang.  Below is my code so far:

Following is my parse tree and output after testing the code below. I have also included the expected JSON output.  Is there something I missing in the recursion, or pass by reference vs pass by value?

Many thanks, 

func toMap(tree antlr.Tree) *linkedhashmap.Map {

    m := linkedhashmap.New()

    traverseMap(tree, m)

    return m

}

func traverseMap(tree antlr.Tree, m *linkedhashmap.Map) {

    if (reflect.TypeOf(tree) == reflect.TypeOf(&antlr.TerminalNodeImpl{})) {

        token := tree.(antlr.TerminalNode).GetSymbol()

        m.Put("type", token.GetTokenType())

        m.Put("text", token.GetText())

    } else {

        children := arraylist.New()

        s := reflect.ValueOf(tree).Type().Elem().Name()

        m.Put(s, children)

        for i := 0; i < tree.GetChildCount(); i++ {

            nested := linkedhashmap.New()

            children.Add(nested)

            traverseMap(tree.GetChild(i), nested)

        }

    }

}

func main() {

    input, _ := antlr.NewFileStream("../input/sample-mvbag-rich.toml")

    lexer := parser.NewVeloLexer(input)

    stream := antlr.NewCommonTokenStream(lexer, 0)

    p := parser.NewVeloParser(stream)

    p.RemoveErrorListeners()

    p.AddErrorListener(errorListiner)

    p.BuildParseTrees = true

    tree := p.Velo()

    j := toMap(tree)

    println(j.Size())

    strB, _ := j.ToJSON()

    print(string(strB))

    //antlr.ParseTreeWalkerDefault.Walk(NewVeloListener(), tree)

}  

{
    "VeloContext": [
        {
            "AuthorContext": [
                {
                    "...": [
                        {
                            "type": 7,
                            "text": "Gervasius Ishuuwa"
                        }
                    ]
                }
            ],
            "OrchestrationContext":[
                ....
            ]
        }
    ]
}

[Benny Siegert]

This should go on golang-nuts instead. This mailing list is for discussion of the development of Go itself. Thanks.

--
You received this message because you are subscribed to the Google Groups "golang-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to golang-dev+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/golang-dev/ab8822cf-41d6-494c-baf4-8cf7c5ef9737%40googlegroups.com.

--

Benny