Function typedDecodeHook

decode_hooks.go:16–36

typedDecodeHook takes a raw DecodeHookFunc (an interface{}) and turns it into the proper DecodeHookFunc type, such as DecodeHookFuncType.

(h DecodeHookFunc)

// typedDecodeHook takes a raw DecodeHookFunc (an interface{}) and turns
// it into the proper DecodeHookFunc type, such as DecodeHookFuncType.
func typedDecodeHook(h DecodeHookFunc) DecodeHookFunc {
	// Create variables here so we can reference them with the reflect pkg
	var f1 DecodeHookFuncType
	var f2 DecodeHookFuncKind
	var f3 DecodeHookFuncValue

	// Fill in the variables into this interface and the rest is done
	// automatically using the reflect package.
	potential := []interface{}{f1, f2, f3}

	v := reflect.ValueOf(h)
	vt := v.Type()
	for _, raw := range potential {
		pt := reflect.ValueOf(raw).Type()
		if vt.ConvertibleTo(pt) {
			return v.Convert(pt).Interface()
		}
	}

	return nil
}

// DecodeHookExec executes the given decode hook. This should be used
// since it'll naturally degrade to the older backwards compatible DecodeHookFunc