[Haskell-cafe] Re: [Haskell] Top Level <-

Brandon S. Allbery KF8NH allbery at ece.cmu.edu
Sun Aug 31 10:31:56 EDT 2008

On 2008 Aug 31, at 10:29, Ganesh Sittampalam wrote:
> On Sun, 31 Aug 2008, Brandon S. Allbery KF8NH wrote:
>> On 2008 Aug 31, at 10:20, Ganesh Sittampalam wrote:
>>> I'm not sure of precisely what you mean here, but stdin, stdout  
>>> and stderr are things provided by the OS to a process. That's what  
>>> defines them as having process scope, not something the Haskell  
>>> language or RTS does.
>> But their representations in Haskell must have the same scope and  
>> are therefore de facto global variables.
> Yep, but this is not Haskell providing a way to make global  
> variables, it is just providing an interface to ones that already  
> exist. The point is that the RTS can't provide (process-scope)

But that is done the same way as providing general global variables,  
so you can't get away from it.

brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH

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