[Haskell-cafe] Re: problem with implicit parameter

[Grzegorz]

Eric <eeoam <at> ukfsn.org> writes:

> 
> Hi there,
> 
> I've written the following program
> 
> putchr = putChar ?d
> 
> main = do
> { c <- getChar
> ; putchr with ?d = c}
> 


I think you're supposed to use a let binding, like this:

putchr :: (?d::Char) => IO ()
putchr = putChar ?d         
main = do
    c <- getChar
    let ?d = c 
    putchr

Best,
--
Grzegorz