Function GetFunctionName

lang/funcs/funcs.go:245–270

GetFunctionName reads the handle to find the underlying real function name. The function can be an actual function or a struct which implements one.

(fn interface{})

// GetFunctionName reads the handle to find the underlying real function name.
// The function can be an actual function or a struct which implements one.
func GetFunctionName(fn interface{}) string {
	pc := runtime.FuncForPC(reflect.ValueOf(fn).Pointer())
	if pc == nil {
		// This part works for structs, the other parts work for funcs.
		t := reflect.TypeOf(fn)
		if t.Kind() == reflect.Pointer {
			t = t.Elem()
		}

		return t.Name()
	}

	// if pc.Name() is: github.com/purpleidea/mgmt/lang/core/math.Pow
	sp := strings.Split(pc.Name(), "/")

	// ...this will be: math.Pow
	s := sp[len(sp)-1]

	ix := strings.LastIndex(s, ".")
	if ix == -1 { // standalone
		return s
	}

	// ... this will be: Pow
	return s[ix+1:]
}

// GetFunctionMetadata builds a metadata struct with everything about this func.
func GetFunctionMetadata(fn interface{}) (*docsUtil.Metadata, error) {