ghc-8.4.2: The GHC API

Safe HaskellNone
LanguageHaskell2010

HsDumpAst

Contents

Description

Contains a debug function to dump parts of the hsSyn AST. It uses a syb traversal which falls back to displaying based on the constructor name, so can be used to dump anything having a Data.Data instance.

Synopsis

Dumping ASTs

showAstData :: Data a => BlankSrcSpan -> a -> SDoc Source #

Show a GHC syntax tree. This parameterised because it is also used for comparing ASTs in ppr roundtripping tests, where the SrcSpan's are blanked out, to avoid comparing locations, only structure