feat(third_party/bazel): Check in rules_haskell from Tweag r/17

1 files changed, 19 insertions, 0 deletions

diff --git a/third_party/bazel/rules_haskell/tutorial/lib/Bool.hs b/third_party/bazel/rules_haskell/tutorial/lib/Bool.hs
new file mode 100644
index 000000000000..7390fcc0b838
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tutorial/lib/Bool.hs
@@ -0,0 +1,19 @@
+-- base is not available when no dependencies, so we have to define everything
+-- from scratch.
+{-# LANGUAGE NoImplicitPrelude #-}
+
+module Bool where
+
+data Bool = False | True
+
+not :: Bool -> Bool
+not False = True
+not True = False
+
+and :: Bool -> Bool -> Bool
+and True True = True
+and _ _ = False
+
+or :: Bool -> Bool -> Bool
+or False False = False
+or _ _ = True