Restructuring hsSyn

[Simon Peyton Jones]

I don’t object.   (They’d be orphan instances, so the interface file will always be loaded; but that’s probably ok.

From: Shayan Najd [mailto:sh.najd at gmail.com]
Sent: 02 August 2017 11:50
To: ghc-devs at haskell.org
Cc: Simon Peyton Jones <simonpj at microsoft.com>; Alan & Kim Zimmerman <alan.zimm at gmail.com>
Subject: Restructuring hsSyn

Currently AST declarations, their relate utilities, and `Outputable` instances are defined in the same files.
Does anyone object to moving `Outputable` instances to separate files?
The purpose is to gradually identify reusable functionalities, group them together, polish them (e.g., remove some unnecessary dependencies), and expose them to the end-users.
At this stage, I don't expect any changes outside hsSyn.

/Shayan
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