ghc-exactprint

ExactPrint for GHC

Version on this page:0.5.5.0
LTS Haskell 20.23:1.5.0@rev:1
Stackage Nightly 2023-05-31:1.6.1.1
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-0.5.5.0@sha256:20995660a804745a456697937012bd2233d67cf2197708c501fb25adcab4c7b5,7083

Module documentation for 0.5.5.0

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

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