0.12 upgrade guide?

chexxor · June 19, 2018, 7:19am

haskman [1:20 AM]
Is there a migration guide for migration to v0.12?

justinw [1:20 AM]
probably not

haskman [1:21 AM]
okay, any docs on the individual issues i’m likely to encounter. Like the effect system, or the new generics?

kritzcreek [1:22 AM]
new generics are generics-rep, they’ve been around for a while, we just don’t have the old ones anymore
The most prominent changes: purescript-eff -> purescript-effect

haskman [1:22 AM]
so any docs on how to migrate old generics code to generics-rep?

kritzcreek [1:22 AM]
purescript-maps + purescript-sets -> purescript-ordered-collections

github.com

purescript/documentation/blob/master/guides/Generic.md

---
title: Generic Programming
author: Phil Freeman
published: 2017-04-25
---

The PureScript compiler has supported _generic deriving_ in some form since version 0.7.3, thanks to [Gershom Bazerman](http://gbaz.github.io/). However, since then, it has gone through several iterations, and the current version (implemented in the `purescript-generics-rep` library) makes it possible to have the compiler derive a wide variety of boilerplate code based on types. One example of this is the serialization and deserialization of JSON, and in this post I'll show how to use the [`purescript-foreign-generic`](https://github.com/paf31/purescript-foreign-generic) library to create such functions using generics.

#### Generics Overview

PureScript's generics are supported by the `purescript-generics-rep` library, and in particular, the `Data.Generic.Rep.Generic` type class:

```purescript
class Generic a rep | a -> rep where
  from :: a -> rep
  to :: rep -> a
```

There are three interesting things here:

This file has been truncated. show original

probably your best bet
if you’ve been using StrMap it’s now called Object in purescript-foreign-object
the purescript-dom library has been split up into various libraries in the purescript-web organization
most other libraries have the relevant changes in their releases page on github