Simple compiler question

[Ken Shan]

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On 2001-07-25T14:39:06-0400, Mark Carroll wrote:
> Do any of the decent Haskell compilers allow you to just type function
> definitions at an interpreter prompt and use them in subsequent
> interactions, as you'd expect from a Lisp environment? I'm fed up of
> editing a tiny file separately and typing :reload each time, etc. Surely
> I'm missing something obvious?

GHCi is what you want:

$ ghci
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 5.00.2, For Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package std ... linking ... done.
Prelude> let f x =3D x + x
Prelude> f 3
6
Prelude>

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