syncext

Documentation

Overview

Package syncext provides extra functionality on top of the sync package.

Index

• func OnceValue[T any](f func() T) func() T
• func OnceValues[T1, T2 any](f func() (T1, T2)) func() (T1, T2)
• func OnceValues3[T1, T2, T3 any](f func() (T1, T2, T3)) func() (T1, T2, T3)

Functions

func OnceValue

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

OnceValue returns a function that invokes f only once and returns the value returned by f. The returned function may be called concurrently.

If f panics, the returned function will panic with the same value on every call.

TODO FUTURE: This is directly copied from 1.21 source, remove when no longer need <1.21.

func OnceValues

func OnceValues[T1, T2 any](f func() (T1, T2)) func() (T1, T2)

OnceValues returns a function that invokes f only once and returns the values returned by f. The returned function may be called concurrently.

If f panics, the returned function will panic with the same value on every call.

TODO FUTURE: This is directly copied from 1.21 source, remove when no longer need <1.21.

func OnceValues3

func OnceValues3[T1, T2, T3 any](f func() (T1, T2, T3)) func() (T1, T2, T3)

OnceValues3 returns a function that invokes f only once and returns the values returned by f. The returned function may be called concurrently.

If f panics, the returned function will panic with the same value on every call.

This is copied from sync.OnceValues and extended to for three values.