#9628: Add Annotations to the AST to simplify source to source conversions -------------------------------------+------------------------------------- Reporter: alanz | Owner: alanz Type: feature | Status: new request | Milestone: Priority: normal | Version: 7.8.3 Component: Compiler | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by simonpj): Alan writes (in email): I have decided to first tackle adding a type parameter to the entire AST, so that tool writers can add custom information as required. My first stab at this is to do is as follows {{{ data HsModule r name = HsModule { ann :: r, -- ^ Annotation for external tool writers hsmodName :: Maybe (Located ModuleName), -- ^ @Nothing@: \"module X where\" is omitted (in which case the next -- field is Nothing too) hsmodExports :: Maybe [LIE name], .... }}} Salient points 1. It comes as the first type parameter, and is called r 2. It gets added as the first field of the syntax element 3. It is always called ann Before undertaking this particular change, I would appreciate some feedback. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9628#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler