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Haskell Cookbook by Yogesh Sajanikar

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How to do it...

  1. Create a new project working-with-text-and-bytestring with the simple Stack template:
        stack new working-with-text-and-bytestring simple
  1. Add dependency on the text and bytestring libraries in the build-depends subsection of the executable section:
        executable working-with-text-and-bytestring
        hs-source-dirs:      src
        main-is:             Main.hs
        default-language:    Haskell2010
        build-depends:       base >= 4.7 && < 5
                       , text
                       , bytestring
  1. Open src/Main.hs. We will add our source here.
  1. At the top of the file, add the following pragma for using overloaded strings before the Main module definition:
        {-# LANGUAGE OverloadedStrings #-}         module Main where

This is the way an extension is enabled for the GHC. This particular extension allows us to use ...

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