Since Text is represented as UTF-16 underneath, you can retrieve the
length in terms of 16-bit code units.
I don't think you'll be able to mmap them though, since the backing
array may be moved by the garbage collector.
See https://hackage.haskell.org/package/text-1.2.2.1/docs/Data-Text-Foreign.html
On Fri, Nov 25, 2016 at 7:20 AM, Cody Goodman
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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