Re: Proposal: System.Environment.getEnv should return Maybe

Evan Laforge wrote:

It's awkward and surprising how getEnv throws an exception when an env var is not set, since it's very common for env vars to be optional, and it's not convenient to catch exceptions in haskell (I have to look up Control.Exception every time, and then add LANGUAGE ScopedTypeVariables). I wind up using 'fmap lookup k Environment.getEnvironment' instead.

So I propose a function: lookupEnv :: String -> IO (Maybe String)

+1 Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/