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field_optional.go
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/
field_optional.go
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package parco
import "io"
type OptionalField[T, U any] struct {
id string
inner OptionalType[U]
setter Setter[T, *U]
getter Getter[T, *U]
}
func (s OptionalField[T, U]) ID() string {
return s.id
}
func (s OptionalField[T, U]) Parse(item *T, r io.Reader) error {
value, err := s.inner.Parse(r)
if err != nil {
return err
}
s.setter(item, value)
return nil
}
func (s OptionalField[T, U]) Compile(item *T, w io.Writer) (err error) {
value := s.getter(item)
return s.inner.Compile(value, w)
}
func OptionField[T, U any](
tp Type[U],
setter Setter[T, *U],
getter Getter[T, *U],
) OptionalField[T, U] {
return OptionalField[T, U]{
inner: Option[U](tp),
setter: setter,
getter: getter,
}
}
func OptionFieldGetter[T, U any](
tp Type[U],
getter Getter[T, *U],
) OptionalField[T, U] {
return OptionField[T, U](tp, nil, getter)
}
func OptionFieldSetter[T, U any](
tp Type[U],
setter Setter[T, *U],
) OptionalField[T, U] {
return OptionField[T, U](tp, setter, nil)
}