template.ParseGlob（）可以解析子目录中的模板吗？

To clean up the template folder I would like to save common templates inside a subfolder. Currently I've the following file structure:

main.go
templates/index.tpl            # Main template for the main page
templates/includes/head.tpl
templates/includes/footer.tpl

head.tpl and footer.tpl will be called within index.tpl, which looks like this:

{{ template "head" . }}
    <h1>My content</h1>
{{ template "footer" .}}

Furthermore the files are parsed using template.ParseGlob(). Here's an excerpt from main.go:

var views = template.Must(template.ParseGlob("src/templates/**/*"))

func Render(rw http.ResponseWriter, temp string, data interface{}) {
    err := views.ExecuteTemplate(rw, temp, data)

    if err != nil {
        http.Error(rw, err.Error(), http.StatusInternalServerError)
    }
}

func Index(rw http.ResponseWriter, req *http.Request) {
    Render(rw, "index.tpl", nil)
}

Everytime I open my browser I get this error message: html/template: "index.tpl" is undefined.

Is it possible, that index.tpl is ignored with this glob pattern? I found this similar question, but the answers present only a work around.

No it cannot.

The documentation is pretty clear here: Globbing for template.ParseGlob works like in filepath.Glob and filepath.Glob uses the syntax of filepath.Match (https://godoc.org/path/filepath#Match) which has no ** for a deep match.

(It really helps to read the documentation carefully.)