Why does -XImplicitParams
work from the command line but not the OPTIONS_GHC pragma?
I've found that ghc t.hs
throws a parse error on input 'a'
if t.hs
contains the following code, while ghc -XImplicitParams t.hs
works fine. Ditto ghci
.
{- OPTIONS_GHC -XImplicitParams -}
f :: (?a :: Int) => Int -> Int
f b = ?a + b
g c = f $ c+1
That would need to be a pragma, with {-# ... #-}
delimiters. Better than an OPTIONS_GHC
pragma is a
{-# LANGUAGE ImplicitParams #-}
pragma.