My guess is that you have defined a main function in your source file.
If you have defined a main
function, loading the module with :l test
won't import any functions but main
. In that case you can load it by prepending an asterix to the module name: :l *test
.
The reason is that the compiled binary will hide non-exported top-level functions. Prepending an asterix forces GHCi to ignore the precompiled module (test) and interprete the source file instead (test.hs).
[jkramer/sgi5k:.../haskell]# cat test.hs
main = do
print $ doubleMe 2
doubleMe x = x + x
[jkramer/sgi5k:.../haskell]# ghc --make test
[jkramer/sgi5k:.../haskell]# ghci
[...some messages...]
>> :l test
Ok, modules loaded: Main.
>> :t doubleMe
<interactive>:1:0: Not in scope: `doubleMe'
>> :l *test
[1 of 1] Compiling Main ( test.hs, interpreted )
Ok, modules loaded: Main.
>> :t doubleMe
doubleMe :: (Num a) => a -> a
Check these links for further information:
http://www.haskell.org/ghc/docs/6.12.2/html/users_guide/ghci-compiled.html
http://www.haskell.org/ghc/docs/6.12.2/html/users_guide/interactive-evaluation.html#ghci-scope