microlens: A tiny lens library with no dependencies. If you're writing an app, you probably want microlens-platform, not this.

[ bsd3, data, lenses, library ] [ Propose Tags ]

This is an extract from lens (with no dependencies). It's not a toy lenses library, unsuitable for “real world”, but merely a small one. It is compatible with lens, and should have same performance. It also has better documentation.

Use this library:

Don't use this library:

If you're writing an application which uses lenses more extensively, look at microlens-platform – it combines features of most other microlens packages (microlens-mtl, microlens-th, microlens-ghc).

If you want to export getters or folds and don't mind the contravariant dependency, please consider using microlens-contra.

There's a longer readme on Github, you should read it if you're interested about using this library.

If you haven't ever used lenses before, read this tutorial. (It's for lens, but it applies to microlens just as well.)

Note that microlens has no dependencies starting from GHC 7.10 (base-4.8). Prior to that, it has to depend on transformers-0.2 or above.

Versions [faq] 0.1.0.0, 0.1.1.0, 0.1.2.0, 0.1.3.0, 0.1.5.0, 0.2.0.0, 0.3.0.0, 0.3.1.0, 0.3.2.0, 0.3.3.0, 0.3.4.0, 0.3.4.1, 0.3.5.0, 0.3.5.1, 0.4.0.0, 0.4.0.1, 0.4.1.0, 0.4.2.0, 0.4.2.1, 0.4.3.0, 0.4.4.0, 0.4.4.1, 0.4.4.2, 0.4.4.3, 0.4.5.0, 0.4.6.0, 0.4.7.0, 0.4.8.0, 0.4.8.1, 0.4.8.2, 0.4.8.3, 0.4.9, 0.4.9.1, 0.4.10 (info)
Change log CHANGELOG.md
Dependencies base (>=4.5 && <5), transformers (>=0.2) [details]
License BSD-3-Clause
Author Edward Kmett, Artyom
Maintainer Artyom <yom@artyom.me>
Category Data, Lenses
Home page http://github.com/aelve/microlens
Bug tracker http://github.com/aelve/microlens/issues
Source repo head: git clone git://github.com/aelve/microlens.git
Uploaded by Artyom at Thu Jun 9 21:50:19 UTC 2016
Distributions Arch:0.4.10, Debian:0.4.9.1, Fedora:0.4.9.1, LTSHaskell:0.4.10, NixOS:0.4.10, Stackage:0.4.10, openSUSE:0.4.10
Downloads 34172 total (769 in the last 30 days)
Rating 2.5 (votes: 11) [estimated by rule of succession]
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Status Hackage Matrix CI
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