[Haskell-cafe] Safe 'chr' function?

[Myles C. Maxfield]

Thanks you two for your answers. Consider this issue closed now :-)

--Myles

On Thu, Jan 3, 2013 at 12:05 AM, Michael Snoyman <michael at snoyman.com>wrote:

> You could wrap chr with a call to spoon[1]. It's not the most elegant
> solution, but it works.
>
> [1]
> http://hackage.haskell.org/packages/archive/spoon/0.3/doc/html/Control-Spoon.html#v:spoon
>
>
> On Thu, Jan 3, 2013 at 9:50 AM, Myles C. Maxfield <
> myles.maxfield at gmail.com> wrote:
>
>> Hello,
>> I'm working on a general text-processing library [1] and one of my
>> quickcheck tests is designed to make sure that my library doesn't throw
>> exceptions (it returns an Either type on failure). However, there are some
>> inputs that cause me to pass bogus values to the 'chr' function (such
>> as 1208914), which causes it to throw an exception. Is there a version of
>> that function that is safe? (I'm hoping for something like Int -> Maybe
>> Char). Alternatively, is there a way to know ahead of time whether or not
>> an Int will cause 'chr' to throw an exception?
>>
>> Thanks,
>> Myles C. Maxfield
>>
>> [1] http://hackage.haskell.org/package/punycode
>>
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>>
>
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