lazy

Documentation

Index

• func OnceFunc(f func()) func()
• func OnceResult[T any](f func() (T, error)) func() (T, error)
• func OnceValue[T any](f func() T) func() T
• func Ternary[T any](ok bool, lhs Value[T], rhs Value[T]) T
• func TernaryValue[T any](ok Value[bool], lhs Value[T], rhs Value[T]) T
• type LazyCell
  • func NewLazyCell[T any](compute func() T) *LazyCell[T]
  • func (self *LazyCell[T]) Get() T
• type OnceCell
  • func (self *OnceCell[T]) Get() optional.Optional[T]
  • func (self *OnceCell[T]) GetOrInit(f func() T) T
• type Value
  • func FuncOf[T any](f func() T) Value[T]
  • func PtrOf[T any](v *T) Value[T]
  • func ValueOf[T any](v T) Value[T]

Functions

func OnceFunc

func OnceFunc(f func()) func()

OnceFunc port from unreleased std module, sync.OnceFunc

func OnceResult

func OnceResult[T any](f func() (T, error)) func() (T, error)

OnceResult port from unreleased std module, sync.OnceValues

func OnceValue

func OnceValue[T any](f func() T) func() T

OnceValue port from unreleased std module, sync.OnceValue

func Ternary

func Ternary[T any](ok bool, lhs Value[T], rhs Value[T]) T

func TernaryValue

func TernaryValue[T any](ok Value[bool], lhs Value[T], rhs Value[T]) T

Types

type LazyCell

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

LazyCell is a lazy value.

Which is initialized on the first access.

func NewLazyCell

func NewLazyCell[T any](compute func() T) *LazyCell[T]

func (*LazyCell[T]) Get

func (self *LazyCell[T]) Get() T

Get forces the evaluation of this lazy value and returns the computed result.

type OnceCell

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

OnceCell is a cell which can be written to only once.

func (*OnceCell[T]) Get

func (self *OnceCell[T]) Get() optional.Optional[T]

Get return existing one if exists, otherwise panics

func (*OnceCell[T]) GetOrInit

func (self *OnceCell[T]) GetOrInit(f func() T) T

GetOrInit return existing one if existed, else create a new then return it

type Value

type Value[T any] interface{ Eval() T }

Value is lazy evaluated data

func FuncOf

func FuncOf[T any](f func() T) Value[T]

func PtrOf

func PtrOf[T any](v *T) Value[T]

func ValueOf

func ValueOf[T any](v T) Value[T]