Repository : ssh://darcs.haskell.org//srv/darcs/testsuite On branch : master
http://hackage.haskell.org/trac/ghc/changeset/a87f1f0829d08bd389cff4cc2672af94f9809bb5 >--------------------------------------------------------------- commit a87f1f0829d08bd389cff4cc2672af94f9809bb5 Author: Simon Peyton Jones <simo...@microsoft.com> Date: Fri Oct 5 16:33:07 2012 +0100 Test Trac #7293 >--------------------------------------------------------------- tests/gadt/T7293.hs | 24 ++++++++++++++++++++ .../should_run/T5472.stdout => gadt/T7293.stderr} | 0 tests/gadt/all.T | 1 + 3 files changed, 25 insertions(+), 0 deletions(-) diff --git a/tests/gadt/T7293.hs b/tests/gadt/T7293.hs new file mode 100644 index 0000000..26d9188 --- /dev/null +++ b/tests/gadt/T7293.hs @@ -0,0 +1,24 @@ +{-# LANGUAGE GADTs, DataKinds, KindSignatures, TypeFamilies, + TypeOperators, RankNTypes #-} + +module T7294 where + +data Nat = Zero | Succ Nat + +data Vec :: * -> Nat -> * where + Nil :: Vec a Zero + Cons :: a -> Vec a n -> Vec a (Succ n) + +type family (m :: Nat) :< (n :: Nat) :: Bool +type instance m :< Zero = False +type instance Zero :< Succ n = True +type instance Succ n :< Succ m = n :< m + +data SNat :: Nat -> * where + SZero :: SNat Zero + SSucc :: forall (n :: Nat). SNat n -> SNat (Succ n) + +nth :: ((k :< n) ~ True) => Vec a n -> SNat k -> a +nth (Cons x _) SZero = x +nth (Cons _ xs) (SSucc k) = nth xs k +nth Nil _ = undefined diff --git a/tests/deSugar/should_run/T5472.stdout b/tests/gadt/T7293.stderr similarity index 100% copy from tests/deSugar/should_run/T5472.stdout copy to tests/gadt/T7293.stderr diff --git a/tests/gadt/all.T b/tests/gadt/all.T index ac56021..566afcb 100644 --- a/tests/gadt/all.T +++ b/tests/gadt/all.T @@ -114,3 +114,4 @@ test('T5424', test('FloatEq', normal, compile, ['']) test('T7205', normal, compile, ['']) +test('T7293', normal, compile_fail, ['']) _______________________________________________ Cvs-ghc mailing list Cvs-ghc@haskell.org http://www.haskell.org/mailman/listinfo/cvs-ghc
