How to convert from lazy text to non-lazy text?

Question

I am new to Haskell, so this may be a trivial problem. I am seeing an error message that says

Couldn't match expected type 'Data.Text.Lazy.Internal.Text'
with actual type 'Data.Text.Internal.Text'

and I think the problem is that the actual type is Data.Text.Text and it expects lazy text. How can I convert one to the other?

EDIT:

here is a simplified code that gives this error.

{-# LANGUAGE OverloadedStrings #-}

import Data.Text.Lazy.Encoding
import Network.Mail.Mime
import Yesod

data FormData = FormData { dataField :: Textarea } deriving Show

part d = Part {
    partType = "text/plain; charset=utf-8"
    , partEncoding = None
    , partFilename = Nothing
    , partContent = encodeUtf8 $ unTextarea $ dataField d
    , partHeaders = []
    }

main = return ()

basically I have a yesod form with a textarea input element and I want to e-mail the contents of the textarea.

Where are you getting the "encodeUtf8" function from? – Antoine Latter Sep 24 '11 at 03:28 — Antoine Latter, Sep 24 '11 at 03:28

score 32 · Accepted Answer · edited Nov 13 '17 at 01:16

32

toStrict from Data.Text.Lazy would do what you ask for (convert lazy to strict).

edited Nov 13 '17 at 01:16

Chris Stryczynski

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answered Sep 21 '11 at 21:11

Thomas

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18

From the error message, it sounds like he actually needs `fromStrict`. Also note that while the docs show it as `Text -> Text`, if you try clicking them you'll see that they are actually different types from different modules. – hammar Sep 21 '11 at 21:21
i have hopefully clarified my problem – akonsu Sep 21 '11 at 22:15

How to convert from lazy text to non-lazy text?

1 Answers1