[Haskell-cafe] "plugins" fails on a simple example

Petr Pudlák petr.mvd at gmail.com
Mon Sep 16 09:49:17 CEST 2013


I'm playing with "plugins", trying to evaluate a simple expression:

|import  Control.Monad
import  System.Eval.Haskell

main  =do
     let  fExpr ="1 + 2 :: Int"
     r <- eval_ fExpr ["Prelude"] [] [] []
             ::IO  (Either  [String] (Maybe  Int))
     case  rof
         Right  (Just  f)  ->do
             print $ f
         Left  err -> putStrLn $"Error:"  ++ unlines err
         _ -> putStrLn $"Unknown error."|

However, it fails with

on the commandline: Warning:
     -fglasgow-exts is deprecated: Use individual extensions instead|

Am I doing something wrong? How can I turn off the flag?

I'm using GHC 7.6.3.


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