A framework of packages for building Haskell applications
選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。
Peter J. Jones a90b207eb4
Add additional functions to the top-level module
crypto Add additional functions to the top-level module 1週間前
opaleye Rename Opaleye -> Database, add helper function 3週間前
validation validation: Add `HasValidLength' instance for `NonEmpty' 4週間前
.envrc Update for NixOS 19.09 1ヶ月前
.gitignore Fix a couple typos, improve the shell.nix file 5ヶ月前
LICENSE Add Iolaus.Opaleye.Config 6ヶ月前
README.md Typo 4週間前
default.nix Initial import of the iolaus-validations library 4週間前



A set of packages that aim to take care of the 20% overlap between all of the Haskell applications that you write.


This collection of packages uses the “MTL + Classy Optics” style of composing the major components of an application.

For more information we highly recommend the talk by George Wilson entitled Next Level MTL with Classy Optics.


  • crypto: Simplified cryptography operations.

  • opaleye: Database queries and schema migrations.

  • validation: Data validation