once
Once provides a type that will enforce that a callback is invoked only once.
Summary
| Latest Version | Unknown |
|---|---|
| License | BSD3 |
| CI Status | Failing |
| Downloads | 0 |
| Last Indexed | 2026-07-22 05:28 |
Tags
Installation
nimble install once
choosenim install once
git clone https://git.sr.ht/~euantorano/once.nim
OS Compatibility
| Platform | Linux | macOS | Windows | FreeBSD | OpenBSD | NetBSD | Android | iOS | WASM | Embedded |
|---|---|---|---|---|---|---|---|---|---|---|
| once | ✓ | ✓ | ✓ | - | - | - | - | - | - | - |
Source
| Repository | https://git.sr.ht/~euantorano/once.nim |
|---|---|
| Homepage | https://git.sr.ht/~euantorano/once.nim |
| Registry Source | nimble_official |
README
once
Once is a Nim library that provides a type that will enforce that a callback is invoked only once.
Installation
once can be installed using Nimble:
nimble install once
Or add the following to your .nimble file:
# Dependencies
requires "once >= 1.0.0"
Usage
The tests directory has a couple of simple examples, but usage is briefly as follows:
import once
var i = 0
proc cb() =
i += 1
var onceInstance = initOnce(cb)
for i in 0..5:
onceInstance.run()
assert(i == 1)
Once also works in multi-threaded mode:
import once
var i = 0
proc cb() =
i += 1
var
onceInstance = initOnce(cb)
thr: array[0..4, Thread[void]]
proc threadProc() {.thread.} =
onceInstance.run()
for i in 0..high(thr):
createThread(thr[i], threadProc)
joinThreads(thr)
assert(i == 1)
CI Status
| OS | Status |
|---|---|
| Debian (Nim stable) |  |
| Debian (Nim devel) |  |