Method decodeStruct

mapstructure.go:1222–1263

(name string, data interface{}, val reflect.Value)

}

func (d *Decoder) decodeStruct(name string, data interface{}, val reflect.Value) error {
	dataVal := reflect.Indirect(reflect.ValueOf(data))

	// If the type of the value to write to and the data match directly,
	// then we just set it directly instead of recursing into the structure.
	if dataVal.Type() == val.Type() {
		val.Set(dataVal)
		return nil
	}

	dataValKind := dataVal.Kind()
	switch dataValKind {
	case reflect.Map:
		return d.decodeStructFromMap(name, dataVal, val)

	case reflect.Struct:
		// Not the most efficient way to do this but we can optimize later if
		// we want to. To convert from struct to struct we go to map first
		// as an intermediary.

		// Make a new map to hold our result
		mapType := reflect.TypeOf((map[string]interface{})(nil))
		mval := reflect.MakeMap(mapType)

		// Creating a pointer to a map so that other methods can completely
		// overwrite the map if need be (looking at you decodeMapFromMap). The
		// indirection allows the underlying map to be settable (CanSet() == true)
		// where as reflect.MakeMap returns an unsettable map.
		addrVal := reflect.New(mval.Type())

		reflect.Indirect(addrVal).Set(mval)
		if err := d.decodeMapFromStruct(name, dataVal, reflect.Indirect(addrVal), mval); err != nil {
			return err
		}

		result := d.decodeStructFromMap(name, reflect.Indirect(addrVal), val)
		return result

	default:
		return fmt.Errorf("'%s' expected a map, got '%s'", name, dataVal.Kind())
	}
}

func (d *Decoder) decodeStructFromMap(name string, dataVal, val reflect.Value) error {
	dataValType := dataVal.Type()