X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=System%2FEnvironment.hs;h=a0761d59951bdbb1710a976edecd3058c815a6cb;hb=dbe5ad2718b2133d8c4205589905cf14acd73dcf;hp=19bccf35453b7ae01fbcdf97292685251d03a6e0;hpb=75ea0fa2485c169f0546d5d40477d2f6747efe29;p=ghc-base.git

diff --git a/System/Environment.hs b/System/Environment.hs
index 19bccf3..a0761d5 100644
--- a/System/Environment.hs
+++ b/System/Environment.hs
@@ -33,6 +33,7 @@ import Foreign
 import Foreign.C
 import Control.Monad
 import GHC.IOBase
+#include "config.h"
 #endif
 
 #ifdef __HUGS__
@@ -50,7 +51,7 @@ import System
 -- ---------------------------------------------------------------------------
 -- getArgs, getProgName, getEnv
 
--- Computation `getArgs' returns a list of the program's command
+-- | Computation 'getArgs' returns a list of the program's command
 -- line arguments (not including the program name).
 
 #ifdef __GLASGOW_HASKELL__
@@ -106,11 +107,13 @@ unpackProgName argv = do
    isPathSeparator _    = False
 
 
--- Computation `getEnv var' returns the value
--- of the environment variable {\em var}.  
-
--- This computation may fail with
---    NoSuchThing: The environment variable does not exist.
+-- | Computation 'getEnv' @var@ returns the value
+-- of the environment variable @var@.  
+--
+-- This computation may fail with:
+--
+--  * 'System.IO.Error.isDoesNotExistError' if the environment variable
+--    does not exist.
 
 getEnv :: String -> IO String
 getEnv name =
@@ -128,6 +131,7 @@ foreign import ccall unsafe "getenv"
 @withArgs args act@ - while executing action @act@, have 'System.getArgs'
 return @args@ (GHC only).
 -}
+withArgs :: [String] -> IO a -> IO a
 withArgs xs act = do
    p <- System.Environment.getProgName
    withArgv (p:xs) act
@@ -136,6 +140,7 @@ withArgs xs act = do
 @withProgName name act@ - while executing action @act@,
 have 'System.getProgName' return @name@ (GHC only).
 -}
+withProgName :: String -> IO a -> IO a
 withProgName nm act = do
    xs <- System.Environment.getArgs
    withArgv (nm:xs) act
@@ -143,6 +148,7 @@ withProgName nm act = do
 -- Worker routine which marshals and replaces an argv vector for
 -- the duration of an action.
 
+withArgv :: [String] -> IO a -> IO a
 withArgv new_args act = do
   pName <- System.Environment.getProgName
   existing_args <- System.Environment.getArgs