How to work with Data.Text via pcre-heavy

I need a simple example to work with Data.Text via prce-heavy. My example is not working, why?

{-# LANGUAGE OverloadedStrings, QuasiQuotes, FlexibleContexts #-}



import Data.Text

import Text.Regex.PCRE.Heavy

import qualified Data.Text.IO as TIO



main = do

    let text = "xxx@yahoo.com" :: Text

    let 

      text2 :: Text

      text2 = gsub ([re|xxx|]) ("yyy" :: Text) text

    TIO.putStrLn text2

But the same code with String work well:

{-# LANGUAGE QuasiQuotes, FlexibleContexts #-}



import Text.Regex.PCRE.Heavy



main = do

    let text = "xxx@yahoo.com" :: String

    let 

      text2 :: String

      text2 = gsub ([re|xxx|]) ("yyy" :: String) text

    putStrLn text2

Errror for 1st sampe:

textproblem.hs:11:15: error:

    * No instance for (Data.String.Conversions.ConvertibleStrings

                         Data.String.Conversions.SBS Text)

        arising from a use of `gsub'

    * In the expression:

        gsub

          ((Text.Regex.PCRE.Light.compile

              (Data.String.Conversions.cs ("xxx" :: String))

              [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

          ("yyy" :: Text)

          text

      In an equation for `text2':

          text2

            = gsub

                ((Text.Regex.PCRE.Light.compile

                    (Data.String.Conversions.cs ("xxx" :: String))

                    [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

                ("yyy" :: Text)

                text

      In the expression:

        do { let text = ...;

             let text2 :: Text

                 text2

                   = gsub

                       ((Text.Regex.PCRE.Light.compile

                           (Data.String.Conversions.cs (...)) ...))

                       ("yyy" :: Text)

                       text;

             TIO.putStrLn text2 }

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

asked Nov 26 '18 at 7:01

Vladimir

1807

1

Do you see an error? If so, what is it

– pdexter
Nov 26 '18 at 7:04

I've run the program successfully using stack (docs.haskellstack.org/en/stable/README) with ghc 8.4.4 and stackage 12.19. How are you trying to run the program?

– pdexter
Nov 26 '18 at 7:37

ghc 8.0.2 Haskell Platform on Windows 7 64 bit. pcre-light compiled with help of msys2

– Vladimir
Nov 26 '18 at 9:54

I'll try to install new Haskell Platform and see...

– Vladimir
Nov 26 '18 at 9:55

add a comment |

I need a simple example to work with Data.Text via prce-heavy. My example is not working, why?

{-# LANGUAGE OverloadedStrings, QuasiQuotes, FlexibleContexts #-}



import Data.Text

import Text.Regex.PCRE.Heavy

import qualified Data.Text.IO as TIO



main = do

    let text = "xxx@yahoo.com" :: Text

    let 

      text2 :: Text

      text2 = gsub ([re|xxx|]) ("yyy" :: Text) text

    TIO.putStrLn text2

But the same code with String work well:

{-# LANGUAGE QuasiQuotes, FlexibleContexts #-}



import Text.Regex.PCRE.Heavy



main = do

    let text = "xxx@yahoo.com" :: String

    let 

      text2 :: String

      text2 = gsub ([re|xxx|]) ("yyy" :: String) text

    putStrLn text2

Errror for 1st sampe:

textproblem.hs:11:15: error:

    * No instance for (Data.String.Conversions.ConvertibleStrings

                         Data.String.Conversions.SBS Text)

        arising from a use of `gsub'

    * In the expression:

        gsub

          ((Text.Regex.PCRE.Light.compile

              (Data.String.Conversions.cs ("xxx" :: String))

              [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

          ("yyy" :: Text)

          text

      In an equation for `text2':

          text2

            = gsub

                ((Text.Regex.PCRE.Light.compile

                    (Data.String.Conversions.cs ("xxx" :: String))

                    [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

                ("yyy" :: Text)

                text

      In the expression:

        do { let text = ...;

             let text2 :: Text

                 text2

                   = gsub

                       ((Text.Regex.PCRE.Light.compile

                           (Data.String.Conversions.cs (...)) ...))

                       ("yyy" :: Text)

                       text;

             TIO.putStrLn text2 }

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

asked Nov 26 '18 at 7:01

Vladimir

1807

1

Do you see an error? If so, what is it

– pdexter
Nov 26 '18 at 7:04

I've run the program successfully using stack (docs.haskellstack.org/en/stable/README) with ghc 8.4.4 and stackage 12.19. How are you trying to run the program?

– pdexter
Nov 26 '18 at 7:37

ghc 8.0.2 Haskell Platform on Windows 7 64 bit. pcre-light compiled with help of msys2

– Vladimir
Nov 26 '18 at 9:54

I'll try to install new Haskell Platform and see...

– Vladimir
Nov 26 '18 at 9:55

add a comment |

I need a simple example to work with Data.Text via prce-heavy. My example is not working, why?

{-# LANGUAGE OverloadedStrings, QuasiQuotes, FlexibleContexts #-}



import Data.Text

import Text.Regex.PCRE.Heavy

import qualified Data.Text.IO as TIO



main = do

    let text = "xxx@yahoo.com" :: Text

    let 

      text2 :: Text

      text2 = gsub ([re|xxx|]) ("yyy" :: Text) text

    TIO.putStrLn text2

But the same code with String work well:

{-# LANGUAGE QuasiQuotes, FlexibleContexts #-}



import Text.Regex.PCRE.Heavy



main = do

    let text = "xxx@yahoo.com" :: String

    let 

      text2 :: String

      text2 = gsub ([re|xxx|]) ("yyy" :: String) text

    putStrLn text2

Errror for 1st sampe:

textproblem.hs:11:15: error:

    * No instance for (Data.String.Conversions.ConvertibleStrings

                         Data.String.Conversions.SBS Text)

        arising from a use of `gsub'

    * In the expression:

        gsub

          ((Text.Regex.PCRE.Light.compile

              (Data.String.Conversions.cs ("xxx" :: String))

              [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

          ("yyy" :: Text)

          text

      In an equation for `text2':

          text2

            = gsub

                ((Text.Regex.PCRE.Light.compile

                    (Data.String.Conversions.cs ("xxx" :: String))

                    [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

                ("yyy" :: Text)

                text

      In the expression:

        do { let text = ...;

             let text2 :: Text

                 text2

                   = gsub

                       ((Text.Regex.PCRE.Light.compile

                           (Data.String.Conversions.cs (...)) ...))

                       ("yyy" :: Text)

                       text;

             TIO.putStrLn text2 }

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

asked Nov 26 '18 at 7:01

Vladimir

1807

I need a simple example to work with Data.Text via prce-heavy. My example is not working, why?

{-# LANGUAGE OverloadedStrings, QuasiQuotes, FlexibleContexts #-}



import Data.Text

import Text.Regex.PCRE.Heavy

import qualified Data.Text.IO as TIO



main = do

    let text = "xxx@yahoo.com" :: Text

    let 

      text2 :: Text

      text2 = gsub ([re|xxx|]) ("yyy" :: Text) text

    TIO.putStrLn text2

But the same code with String work well:

{-# LANGUAGE QuasiQuotes, FlexibleContexts #-}



import Text.Regex.PCRE.Heavy



main = do

    let text = "xxx@yahoo.com" :: String

    let 

      text2 :: String

      text2 = gsub ([re|xxx|]) ("yyy" :: String) text

    putStrLn text2

Errror for 1st sampe:

textproblem.hs:11:15: error:

    * No instance for (Data.String.Conversions.ConvertibleStrings

                         Data.String.Conversions.SBS Text)

        arising from a use of `gsub'

    * In the expression:

        gsub

          ((Text.Regex.PCRE.Light.compile

              (Data.String.Conversions.cs ("xxx" :: String))

              [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

          ("yyy" :: Text)

          text

      In an equation for `text2':

          text2

            = gsub

                ((Text.Regex.PCRE.Light.compile

                    (Data.String.Conversions.cs ("xxx" :: String))

                    [read "PCREOption {unPCREOption = 2048}" :: PCREOption]))

                ("yyy" :: Text)

                text

      In the expression:

        do { let text = ...;

             let text2 :: Text

                 text2

                   = gsub

                       ((Text.Regex.PCRE.Light.compile

                           (Data.String.Conversions.cs (...)) ...))

                       ("yyy" :: Text)

                       text;

             TIO.putStrLn text2 }

regex haskell text pcre

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

asked Nov 26 '18 at 7:01

Vladimir

1807

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

asked Nov 26 '18 at 7:01

Vladimir

1807

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

edited Nov 26 '18 at 8:23

Micha Wiedenmann

10.4k1364104

asked Nov 26 '18 at 7:01

Vladimir

1807

asked Nov 26 '18 at 7:01

Vladimir

1807

asked Nov 26 '18 at 7:01

Vladimir

1807

1

Do you see an error? If so, what is it

– pdexter
Nov 26 '18 at 7:04

I've run the program successfully using stack (docs.haskellstack.org/en/stable/README) with ghc 8.4.4 and stackage 12.19. How are you trying to run the program?

– pdexter
Nov 26 '18 at 7:37

ghc 8.0.2 Haskell Platform on Windows 7 64 bit. pcre-light compiled with help of msys2

– Vladimir
Nov 26 '18 at 9:54

I'll try to install new Haskell Platform and see...

– Vladimir
Nov 26 '18 at 9:55

add a comment |

1

Do you see an error? If so, what is it

– pdexter
Nov 26 '18 at 7:04

I've run the program successfully using stack (docs.haskellstack.org/en/stable/README) with ghc 8.4.4 and stackage 12.19. How are you trying to run the program?

– pdexter
Nov 26 '18 at 7:37

ghc 8.0.2 Haskell Platform on Windows 7 64 bit. pcre-light compiled with help of msys2

– Vladimir
Nov 26 '18 at 9:54

I'll try to install new Haskell Platform and see...

– Vladimir
Nov 26 '18 at 9:55

Do you see an error? If so, what is it

– pdexter
Nov 26 '18 at 7:04

I've run the program successfully using stack (docs.haskellstack.org/en/stable/README) with ghc 8.4.4 and stackage 12.19. How are you trying to run the program?

– pdexter
Nov 26 '18 at 7:37

ghc 8.0.2 Haskell Platform on Windows 7 64 bit. pcre-light compiled with help of msys2

– Vladimir
Nov 26 '18 at 9:54

I'll try to install new Haskell Platform and see...

– Vladimir
Nov 26 '18 at 9:55

add a comment |

1 Answer
1

active

oldest

votes

After reinstalling Haskell Platform to recent version and adding pcre library to msys2 and some experiments, I can say, that this sample works well (Haskell Platform on Windows-7 (64-bit) with ghc 8.4.3, msys2 with pcre.h and libpcre.a added via pacman, and installed carefully pcre-light and pcre-heavy). On Debian Linux (64-bit) it works well, too, and without any tricks. Why I saw a previous error -- I have no idea, maybe, except problem with older version.

answered Dec 6 '18 at 11:17

Vladimir

1807

add a comment |

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answered Dec 6 '18 at 11:17

Vladimir

1807

add a comment |

answered Dec 6 '18 at 11:17

Vladimir

1807

add a comment |

answered Dec 6 '18 at 11:17

Vladimir

1807

answered Dec 6 '18 at 11:17

Vladimir

1807

answered Dec 6 '18 at 11:17

Vladimir

1807

answered Dec 6 '18 at 11:17

Vladimir

1807

answered Dec 6 '18 at 11:17

Vladimir

1807

add a comment |

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