Method evaluateDestination

array.go:352–385

(rt reflect.Type)

type GenericArray struct{ A any }

func (GenericArray) evaluateDestination(rt reflect.Type) (reflect.Type, func([]byte, reflect.Value) error, string) {
	var assign func([]byte, reflect.Value) error
	var del = ","

	// TODO calculate the assign function for other types
	// TODO repeat this section on the element type of arrays or slices (multidimensional)
	{
		if reflect.PointerTo(rt).Implements(typeSQLScanner) {
			// dest is always addressable because it is an element of a slice.
			assign = func(src []byte, dest reflect.Value) (err error) {
				ss := dest.Addr().Interface().(sql.Scanner)
				if src == nil {
					err = ss.Scan(nil)
				} else {
					err = ss.Scan(src)
				}
				return
			}
			goto FoundType
		}

		assign = func([]byte, reflect.Value) error {
			return fmt.Errorf("pq: scanning to %s is not implemented; only sql.Scanner", rt)
		}
	}

FoundType:

	if ad, ok := reflect.Zero(rt).Interface().(ArrayDelimiter); ok {
		del = ad.ArrayDelimiter()
	}

	return rt, assign, del
}

// Scan implements the sql.Scanner interface.
func (a GenericArray) Scan(src any) error {