id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc
77,Binding variables on the prompt,apfelmus,nobody,"In GHCi, it's possible to bind variables at the interactive prompt, like

{{{
 > let x = 1
 > x + 1
 2
 > y <- readFile ""Foo.bar""
 ""Hello World""
 > length y
 11
}}}

The rule is that the bindings are legal in the do-notation for the IO-monad. For details, see [http://www.haskell.org/ghc/docs/latest/html/users_guide/ch03s04.html Interactive evaluation at the prompt] in the GHC user's guide. I'm dearly missing this feature in Hugs!",enhancement,new,major,,hugs,current,,interactive prompt variable binding,