https://github.com/ryota-ka/duration

A tiny compile-time time utility library, inspired by zeit/ms.
https://github.com/ryota-ka/duration

haskell template-haskell time

Last synced: 2 months ago
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A tiny compile-time time utility library, inspired by zeit/ms.

• Host: GitHub
• URL: https://github.com/ryota-ka/duration
• Owner: ryota-ka
• License: bsd-3-clause
• Created: 2018-02-15T19:51:58.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2021-03-13T06:41:36.000Z (almost 4 years ago)
• Last Synced: 2024-10-05T02:35:28.255Z (3 months ago)
• Topics: haskell, template-haskell, time
• Language: Haskell
• Homepage: https://hackage.haskell.org/package/duration
• Size: 14.6 KB
• Stars: 9
• Watchers: 4
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: ChangeLog.md
  • License: LICENSE

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README

        
# duration

A tiny compile-time time utility library, inspired by [zeit/ms](https://github.com/zeit/ms).

## Examples

```haskell

{-# LANGUAGE QuasiQuotes #-}

{-# LANGUAGE TypeApplications #-}

module Main where

import Data.Time.Clock (DiffTime, NominalDiffTime)

import Data.Time.Clock.Duration (t, s, ms, µs, ns, ps)

main :: IO ()

main = do

    print @DiffTime [t| 1 day |] -- 86400s

    print @DiffTime [t| 2h |]    -- 7200s

    print @DiffTime [t| -1m |]   -- -60s

    print @NominalDiffTime [s| 1 |]  -- 1s

    print @NominalDiffTime [ms| 1 |] -- 0.001s

    print @NominalDiffTime [µs| 1 |] -- 0.000001s

    print @NominalDiffTime [ns| 1 |] -- 0.000000001s

    print @NominalDiffTime [ps| 1 |] -- 0.000000000001s

    print @Int      [s| 2 days |]  -- 172800

    print @Integer  [ms| 5s |]     -- 5000

    print @Double   [µs| 2min |]   -- 1.2e8

    print @Float    [ns| -1 sec |] -- -1.0e9

    print @Rational [ps| 10ms |]   -- 10000000000 % 1

```