Brandon Allbery <allber...@gmail.com> writes: > At a guess, because the ghc package defaults to being hidden (it's creating > a new ghc instance at runtime, so the visibility of the ghc package when > compiling your code is not relevant) you need to do the ghc-api equivalent > of "-package ghc". Or for testing just "ghc-pkg expose ghc".
Hmm, would that also explain why the Prelude and Control.Monad modules are not shown either? Is there a way to expose all modules programmatically? > > On Fri, Aug 2, 2019 at 3:47 PM Sam Halliday <sam.halli...@gmail.com> wrote: > >> To answer my own question with a solution and another question: >> >> Sam Halliday writes: >> > I'm mostly interested in gathering information about symbols and their >> > type signatures. As a first exercise: given a module+import section >> > for a haskell source file, I want to find out which symbols (and their >> > types) are available. Like :browse in ghci, but programmatically. >> >> This is answered by Stephen Diehl's blog post on the ghc api! How lucky >> I am: http://www.stephendiehl.com/posts/ghc_01.html >> >> He points to getNamesInScope >> >> Unfortunately I'm getting zero Names back when loading a file that >> imports several modules from ghc. Is there something I'm missing in the >> following? >> >> module Main where >> >> import Control.Monad >> import Control.Monad.IO.Class >> import GHC >> import GHC.Paths (libdir) >> >> main = runGhc (Just libdir) $ do >> dflags <- getSessionDynFlags >> void $ setSessionDynFlags $ dflags { >> hscTarget = HscInterpreted >> , ghcLink = LinkInMemory >> } >> addTarget $ Target (TargetFile "exe/Main.hs" Nothing) False Nothing >> res <- load LoadAllTargets >> liftIO $ putStrLn $ showPpr dflags res >> names <- getNamesInScope >> liftIO $ putStrLn $ "seen " <> (show $ length names) <> " Names" >> >> >> -- >> Best regards, >> Sam >> _______________________________________________ >> ghc-devs mailing list >> ghc-devs@haskell.org >> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >> > > > -- > brandon s allbery kf8nh > allber...@gmail.com -- Best regards, Sam
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