From 3624c712d72d246f21d4e710cec7c11e052e0326 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Tue, 9 Dec 2025 16:32:32 +0100
Subject: Add the haskell book

---
 Haskell-book/11/Programmer.hs | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Haskell-book/11/Programmer.hs

(limited to 'Haskell-book/11/Programmer.hs')

diff --git a/Haskell-book/11/Programmer.hs b/Haskell-book/11/Programmer.hs
new file mode 100644
index 0000000..4d27fe0
--- /dev/null
+++ b/Haskell-book/11/Programmer.hs
@@ -0,0 +1,40 @@
+module Programmer where
+
+data OperatingSystem = GnuPlusLinux
+                     | OpenBSDPlusNevermindJustBSDStill
+                     | Mac
+                     | Windows
+                     deriving (Eq, Show)
+
+data ProgLang = Haskell
+              | Agda
+              | Idris
+              | PureScript
+              deriving (Eq, Show)
+
+data Programmer = Programmer { os :: OperatingSystem
+                             , lang :: ProgLang }
+                  deriving (Eq, Show)
+
+allOperatingSystems :: [OperatingSystem]
+allOperatingSystems =
+    [ GnuPlusLinux
+    , OpenBSDPlusNevermindJustBSDStill
+    , Mac
+    , Windows
+    ]
+
+allLanguages :: [ProgLang]
+allLanguages =
+    [ Haskell
+    , Agda
+    , Idris
+    , PureScript
+    ]
+
+allProgrammers :: [Programmer]
+allProgrammers = do
+    o <- allOperatingSystems
+    l <- allLanguages
+    return Programmer { os = o
+                      , lang = l }
-- 
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