optional

package

v0.0.0-...-8eb740a Latest Latest Go to latest Published: Oct 23, 2023 License: MIT Imports: 5 Imported by: 0

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func IfPresent[T any](from Optional[T], f types.Consumer[T])

type MonadImpl[T, U any] struct{}

func (MonadImpl[T, U]) Bind(src Optional[T], f types.Function[T, Optional[U]]) Optional[U]

func (MonadImpl[T, U]) Plus(a Optional[T], b Optional[T]) Optional[T]

func (MonadImpl[T, U]) Unit(value U) Optional[U]

func (MonadImpl[T, U]) Zero() Optional[U]

type Optional[T any] struct {
	// contains filtered or unexported fields
}

func Empty[T any]() Optional[T]

func Filter[T any](from Optional[T], f types.Function[T, bool]) Optional[T]

func FlatMap[F, T any](o Optional[F], f types.Function[F, Optional[T]]) Optional[T]

func Map[F, T any](o Optional[F], f types.Function[F, T]) Optional[T]

func New[T any](value T) Optional[T]

func (o Optional[T]) Equal(o2 Optional[T]) bool

func (o Optional[T]) IsEmpty() bool

func (o Optional[T]) OrElse(e T) T

func (o Optional[T]) OrElseZero() T