optionals

Documentation

Index

• Variables
• type Optional
  • func FlatMap[T any, V any](optional Optional[T], fn func(T) Optional[V]) Optional[V]
  • func From[T any](value T) Optional[T]
  • func FromError[T any](value T, err error) Optional[T]
  • func FromNillable[T any](value interface{}) Optional[T]
  • func None[T any]() Optional[T]
  • func Some[T any](value T) Optional[T]
  • func (optional Optional[T]) FlatMap(fn func(T) Optional[any]) Optional[any]
  • func (optional Optional[T]) Get() T
  • func (optional Optional[T]) GetDefault(value T) T
  • func (optional Optional[T]) GetElse(fn func() T) T
  • func (optional Optional[T]) GetPtr() *T
  • func (optional Optional[T]) GetTry() (value T, err error)
  • func (optional Optional[T]) IfPresent(fn func(T))
  • func (optional Optional[T]) IfPresentElse(fn func(T), fn_ func())
  • func (optional Optional[T]) IsEmpty() bool
  • func (optional Optional[T]) IsPresent() bool
  • func (optional Optional[T]) Map(fn func(T) T)

Variables

var (
	ErrorEmpty = errors.New("optional has no value")
)

Types

type Optional

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

func FlatMap

func FlatMap[T any, V any](optional Optional[T], fn func(T) Optional[V]) Optional[V]

func From

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

func FromError

func FromError[T any](value T, err error) Optional[T]

func FromNillable

func FromNillable[T any](value interface{}) Optional[T]

func None

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

func Some

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

func (Optional[T]) FlatMap

func (optional Optional[T]) FlatMap(fn func(T) Optional[any]) Optional[any]

func (Optional[T]) Get

func (optional Optional[T]) Get() T

func (Optional[T]) GetDefault

func (optional Optional[T]) GetDefault(value T) T

func (Optional[T]) GetElse

func (optional Optional[T]) GetElse(fn func() T) T

func (Optional[T]) GetPtr

func (optional Optional[T]) GetPtr() *T

func (Optional[T]) GetTry

func (optional Optional[T]) GetTry() (value T, err error)

func (Optional[T]) IfPresent

func (optional Optional[T]) IfPresent(fn func(T))

func (Optional[T]) IfPresentElse

func (optional Optional[T]) IfPresentElse(fn func(T), fn_ func())

func (Optional[T]) IsEmpty

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

func (Optional[T]) IsPresent

func (optional Optional[T]) IsPresent() bool

func (Optional[T]) Map

func (optional Optional[T]) Map(fn func(T) T)