[Haskell] offside rule question

[Frederik Eaton]

Huh, that seems patronizing. Well at least I can override it with {}.

Thanks,

Frederik

On Thu, Jul 14, 2005 at 02:42:53AM +0200, Lennart Augustsson wrote:
> That's how it is defined in the Haskell definition.
> 
> But there is a reason.  The offside rule (or whatever yoy want to
> call it) is there to give visual cues.  If you were allowed to override
> these easily just because it's parsable in principle then your code
> would no longer have these visual cues that make Haskell code fairly
> easy to read.
> 
> 	-- Lennart
> 
> Frederik Eaton wrote:
> >Compiling the following module (with ghc) fails with error message
> >"parse error (possibly incorrect indentation)", pointing to the let
> >statement. The error goes away when I indent the lines marked "--*".
> >
> >But I don't understand how what I've written could be ambiguous. If I
> >am inside a parenthesized expression, then I can't possibly start
> >another let-clause. The fact that the compiler won't acknowledge this
> >fact ends up causing a lot of my code to be squished up against the
> >right margin when it seems like it shouldn't have to be.
> >
> >module Main where
> >
> >main :: IO ()
> >main = do
> >    let a = (map (\x->
> >        x+1) --*
> >        [0..9]) --*
> >    print a
> >    return ()
> >
> >Is there a reason for this behavior or is it just a shortcoming of the
> >compiler?
> >
> >Frederik
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> >
>