Goで構造体をダンプする

package main

import "fmt"

import "github.com/kr/pretty"

type Node struct {
    TagName   string
    Id        string
    ClassName string
    Children  []*Node
}

func (n *Node) appendChild(child *Node) {
    n.Children = append(n.Children, child)
}

func main() {
    body := &Node{TagName: "body", Id: "main"}
    {
        header := &Node{TagName: "div", Id: "header"}
        content := &Node{TagName: "div", Id: "content"}
        footer := &Node{TagName: "div", Id: "footer"}

        body.appendChild(header)
        body.appendChild(content)
        body.appendChild(footer)

        title := &Node{TagName: "h1", Id: "title", ClassName: "title"}
        content.appendChild(title)

    }
    fmt.Printf("%v\n", pretty.Formatter(body))

    fmt.Printf("%+v\n", pretty.Formatter(body))
    fmt.Printf("%+ v\n", pretty.Formatter(body))

    fmt.Printf("%#v\n", pretty.Formatter(body))
    fmt.Printf("%# v\n", pretty.Formatter(body))

}

実行結果

&{body main  [0xc208018280 0xc2080182d0 0xc208018320]}
&{TagName:body Id:main ClassName: Children:[0xc208018280 0xc2080182d0 0xc208018320]}
&{TagName:body Id:main ClassName: Children:[ 0xc208018280  0xc2080182d0  0xc208018320]}
&main.Node{TagName:"body", Id:"main", ClassName:"", Children:[]*main.Node{(*main.Node)(0xc208018280), (*main.Node)(0xc2080182d0), (*main.Node)(0xc208018320)}}
&main.Node{
    TagName:   "body",
    Id:        "main",
    ClassName: "",
    Children:  {
        &main.Node{
            TagName:   "div",
            Id:        "header",
            ClassName: "",
            Children:  nil,
        },
        &main.Node{
            TagName:   "div",
            Id:        "content",
            ClassName: "",
            Children:  {
                &main.Node{
                    TagName:   "h1",
                    Id:        "title",
                    ClassName: "title",
                    Children:  nil,
                },
            },
        },
        &main.Node{
            TagName:   "div",
            Id:        "footer",
            ClassName: "",
            Children:  nil,
        },
    },
}

結論

fmt.Printf("%# v", pretty.Formatter(obj))

↑これが良さそう。