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

On Wed, Feb 22, 2012 at 18:51, John Meacham wrote:

On Wed, Feb 22, 2012 at 3:05 PM, 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

For true IO exceptions, you should be using the Prelude.catch mechanism.

This still assumes that it's an exceptional condition that is being modeled. It is not; it is correctly modeled as a Maybe. -- brandon s allbery allbery.b@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms