Import hs-plugins cvs

examples/pdynload/spj1/Makefile

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+
+TEST=pdynload/spj1
+
+TOP=../../..
+include ../../build.mk

examples/pdynload/spj1/Plugin.hs

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+module Plugin where
+
+-- user doesn't import the API
+-- and provides a polymorphic value
+
+-- import API
+-- resource :: Interface
+
+--
+-- should pass type check, and dump core
+--
+-- resource :: Num a => a
+
+-- import API
+
+resource :: Num a => a
+resource = 7

examples/pdynload/spj1/api/API.hs

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+
+module API where
+
+-- data Interface = Interface { field :: Int }
+
+-- newtype Interface = Interface Int
+
+type Interface = Int
+

examples/pdynload/spj1/prog/Main.hs

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+
+import Plugins
+import API
+
+src     = "../Plugin.hs"
+wrap    = "../Wrapper.hs"
+apipath = "../api"
+
+main = do status <- make src ["-i"++apipath]
+          case status of
+                MakeSuccess _ _ -> f
+                MakeFailure e   -> mapM_ putStrLn e
+
+  where f = do v <- pdynload "../Plugin.o" ["../api"] [] "API.Interface" "resource"
+               case v of
+                 LoadSuccess _ (a :: Interface) -> print $ a -- will crash
+                 LoadFailure es     -> putStrLn $ show es