[Haskell-cafe] Creating a instance for (Storable Text)

[Ken Bateman]

Maybe you want to use Data.Serialize?  Encode to and from a bytestring.

On Nov 24, 2016 1:24 PM, "Michael Snoyman" <michael at snoyman.com> wrote:

> It can't be done. Instances of Storable need to have a fixed serialized
> size, and Text values don't.
>
> On Thu, Nov 24, 2016, 8:21 PM Cody Goodman <codygman.consulting at gmail.com>
> wrote:
>
>> Any ideas on how I'd write this instance? I know for it to be storable it
>> needs a size, couldn't I just get the length of the text? Has anyone did
>> anything similar?
>>
>> I ran into a surprise when trying to use storable-record and
>> derive-storable and tried using them with a record that contained a Text
>> field.
>>
>> My end goal is having a vector of records that could contain Text,
>> UTCTime, or other similarly complex types which I can write as an mmap to
>> disk and then read back to the original format.
>>
>> Thanks!
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>
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