[Haskell-cafe] some ideas for Haskell', from Python

minh thu noteed at gmail.com
Wed Jan 14 10:16:48 EST 2009

2009/1/14 Neil Mitchell <ndmitchell at gmail.com>:
> Hi
>> 1) In a Python string it is available the \U{name} escape, where name is
>>   a character name in the Unicode database.
>>   As an example:
>>       foo = u"abc\N{VULGAR FRACTION ONE HALF}"
> Hmm, looks nice, and sensible. But as soon as you've got \N{....} syntax I want:
> "foo\E{show i}bar"
> i.e. embed expressions in strings. I think this would be fantastic.


why not simpy "foo\E{i}bar" ?

>> 2) In Python it is possible to import modules inside a function.
>>   In Haskell something like:
>>   joinPath' root name =
>>       joinPath [root, name]
>>       importing System.FilePath (joinPath)
> Looks a bit ugly, but kind of useful. I'd make the syntax:
> joinPath' root name = joinPath [root,name]
>  where import System.FilePath(joinPath)
> It does mean you need to read an entire file to see what functions it
> imports, but perhaps that is the way it should be. I could also
> imagine a syntax:
> joinPath' root name = import.System.FilePath.joinPath [root,name]
> i.e. doing an import and use at the same time.

and why not simply System.FilePath.joinPath (without the import.) ?


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