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  • #10250

Closed
Open
Opened Apr 06, 2015 by Alan Zimmerman@alanzDeveloper

API Annotations : add Locations in hsSyn where layout occurs

At the moment ghc-exactprint, which uses the GHC API Annotations to provide a framework for roundtripping Haskell source code with optional AST edits, has to implement a horrible workaround to manage the points where layout needs to be captured.

These are

  MatchGroup
  HsDo
  HsCmdDo
  HsLet
  LetStmt
  HsCmdLet
  GRHSs

To provide a more natural representation, the contents subject to layout rules need to be wrapped in a SrcSpan.

Edited Mar 10, 2019 by Ben Gamari
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Reference: ghc/ghc#10250