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author | David Terei <davidterei@gmail.com> | 2011-07-20 11:09:03 -0700 |
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committer | David Terei <davidterei@gmail.com> | 2011-07-20 11:26:35 -0700 |
commit | 16514f272fb42af6e9c7674a9bd6c9dce369231f (patch) | |
tree | e4f332b45fe65e2a7a2451be5674f887b42bf199 /testsuite/tests/gadt/gadt5.hs | |
parent | ebd422aed41048476aa61dd4c520d43becd78682 (diff) | |
download | haskell-16514f272fb42af6e9c7674a9bd6c9dce369231f.tar.gz |
Move tests from tests/ghc-regress/* to just tests/*
Diffstat (limited to 'testsuite/tests/gadt/gadt5.hs')
-rw-r--r-- | testsuite/tests/gadt/gadt5.hs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/testsuite/tests/gadt/gadt5.hs b/testsuite/tests/gadt/gadt5.hs new file mode 100644 index 0000000000..5db3deef8c --- /dev/null +++ b/testsuite/tests/gadt/gadt5.hs @@ -0,0 +1,23 @@ +{-# LANGUAGE GADTs #-} + +module Main where + +data Term a where + Lit :: Int -> Term Int + IsZero :: Term Int -> Term Bool + If :: Term Bool -> Term a -> Term a -> Term a + Pr :: Term a -> Term b -> Term (a, b) + Fst :: Term (a, b) -> Term a + Snd :: Term (a, b) -> Term b + +eval :: Term v -> v +eval (Lit n) = n +eval (IsZero t) = eval t == 0 +eval (If t1 t2 t3) = if eval t1 then eval t2 else eval t3 +eval (Pr t1 t2) = (eval t1, eval t2) +eval (Fst t) = case (eval t) of { (a,b) -> a } +eval (Snd t) = case (eval t) of { (a,b) -> b } + +term = If (IsZero (Lit 1)) (Pr (Lit 2) (Lit 3)) (Pr (Lit 3) (Lit 4)) + +main = print (eval term)
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