ghc-exactprint

ExactPrint for GHC

Version on this page:	0.5.6.1
LTS Haskell 20.23:	1.5.0@rev:1
Stackage Nightly 2023-05-29:	1.6.1.1
Latest on Hackage:	1.7.0.0

See all snapshots ghc-exactprint appears in

BSD-3-Clause licensed by Alan Zimmerman, Matthew Pickering

Maintained by alan.zimm@gmail.com

This version can be pinned in stack with:ghc-exactprint-0.5.6.1@sha256:bfd45b82a5304e410b5dda53c6667fc082d5adf3d72480b83558033176fcc310,7331

Module documentation for 0.5.6.1

Language
- Language.Haskell
  - Language.Haskell.GHC
    - Language.Haskell.GHC.ExactPrint

Depends on 11 packages(full list with versions):

base, bytestring, containers, directory, filepath, free, ghc, ghc-boot, ghc-paths, mtl, syb

Used by 2 packages in lts-12.14(full list with versions):

apply-refact, brittany

Using the API Annotations available from GHC 7.10.2, this library provides a means to round trip any code that can be compiled by GHC, currently excluding lhs files.

It does this with a phased approach

Delta - converts GHC API Annotations into relative offsets, indexed by SrcSpan
Transform - functions to facilitate changes to the AST, adjusting the annotations generated in the Delta phase to suit the changes.
Print - converts an AST and its annotations to properly formatted source text.
Pretty - adds annotations to an AST (fragment) so that the output can be parsed back to the same AST.

Note: requires GHC 7.10.2 or later