[Haskell-cafe] ANN: moe html combinator

[Brandon S. Allbery KF8NH]

On Aug 30, 2009, at 14:56 , S.Doaitse Swierstra wrote:
> On 28 aug 2009, at 08:11, Jason Dusek wrote:
> 2009/08/27 Bulat Ziganshin <bulat.ziganshin at gmail.com>:
>>> ...stop reusing Prelude operators, in particular, replace "-"
>>> with "$"?
>>
>> I have to say, the `$ do` construct is an eyesore and `- do` is a
>> lot easier on the eyes.
>>
>> Would it introduce ambiguity in the Haskell grammar if
>>
>>  foo do...
>>
>>  foo case...
>>
>>  foo if...
>>
>> were always parsed as:
>>
>>  foo (do...)
>>
>>  foo (case...)
>>
>>  foo (if...)
>
> For the first two it would not make a difference, since they are  
> essentially closed constructs, following the offside rule which  
> inserts a } at the place where they end, so this cannot give rise to  
> an ambiguous interpretetation. One might even argue that their  
> current precedence level in the Haskell definition is "suboptimal".
> The "if" is a different thing, due to the absence of offside rules  
> for if.


mapM.  And yes, I know about forM; are there any other examples of this?

-- 
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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