optional

Documentation

Index

• type Optional
  • func Clone[T clone.Cloneable[T]](opt Optional[T]) Optional[T]
  • func From[T any](data T, ok bool) Optional[T]
  • func Map[A, B any](opt Optional[A], mapFn delegate.Function1[A, B]) Optional[B]
  • func None[T any]() Optional[T]
  • func Of[T any](data *T) Optional[T]
  • func Some[T any](data T) Optional[T]
  • func (self Optional[T]) And(opt Optional[T]) Optional[T]
  • func (self Optional[T]) Filter(fn delegate.Predicate[T]) Optional[T]
  • func (self Optional[T]) IfPresent(consume delegate.Consumer1[T])
  • func (self Optional[T]) IsNone() bool
  • func (self Optional[T]) IsSome() bool
  • func (self Optional[T]) Map(mapFn delegate.Function1[T, T]) Optional[T]
  • func (self Optional[T]) Or(opt Optional[T]) Optional[T]
  • func (self Optional[T]) OrElse(defaultValue T) T
  • func (self Optional[T]) OrZero() T
  • func (self Optional[T]) String() string
  • func (self Optional[T]) Value() T

Types

type Optional

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

Optional is a value that may or may not be present.

func Clone

func Clone[T clone.Cloneable[T]](opt Optional[T]) Optional[T]

func From

func From[T any](data T, ok bool) Optional[T]

From returns an Optional from a value.

func Map

func Map[A, B any](opt Optional[A], mapFn delegate.Function1[A, B]) Optional[B]

func None

func None[T any]() Optional[T]

None returns an Optional from a value.

func Of

func Of[T any](data *T) Optional[T]

Of returns an Optional from a value.

func Some

func Some[T any](data T) Optional[T]

Some returns an Optional from a value.

func (Optional[T]) And

func (self Optional[T]) And(opt Optional[T]) Optional[T]

func (Optional[T]) Filter

func (self Optional[T]) Filter(fn delegate.Predicate[T]) Optional[T]

func (Optional[T]) IfPresent

func (self Optional[T]) IfPresent(consume delegate.Consumer1[T])

func (Optional[T]) IsNone

func (self Optional[T]) IsNone() bool

IsNone returns true if the Optional is None.

func (Optional[T]) IsSome

func (self Optional[T]) IsSome() bool

IsSome returns true if the Optional is Some.

func (Optional[T]) Map

func (self Optional[T]) Map(mapFn delegate.Function1[T, T]) Optional[T]

func (Optional[T]) Or

func (self Optional[T]) Or(opt Optional[T]) Optional[T]

func (Optional[T]) OrElse

func (self Optional[T]) OrElse(defaultValue T) T

func (Optional[T]) OrZero

func (self Optional[T]) OrZero() T

func (Optional[T]) String

func (self Optional[T]) String() string

func (Optional[T]) Value

func (self Optional[T]) Value() T

Value returns the value of the Optional.