Compatibility with QuickCheck 2 as well as QuickCheck 1

Used the C preprocessor to make it compile against either QuickCheck version. Added some implementations for the new "shrink" method of class Arbitrary.

The tests (runTests 10) succeed when compiled with QC 1. 

With QC 2 (runTests 10 too) the fourth "vector operations" test (complex trigonometry) now fails. I don't know whether this is a bug in my changes, or whether QC 2 just generates Doubles differently and thus uncovered a real bug.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/Numeric/LinearAlgebra/Tests/Properties.hs b/lib/Numeric/LinearAlgebra/Tests/Properties.hs
index ec87ad0..d4c2770 100644
--- a/lib/Numeric/LinearAlgebra/Tests/Properties.hs
+++ b/lib/Numeric/LinearAlgebra/Tests/Properties.hs
@@ -1,4 +1,5 @@
-{-# OPTIONS #-}
+{-# LANGUAGE CPP #-}
+{-# OPTIONS_GHC -fno-warn-unused-imports #-}
 -----------------------------------------------------------------------------
 {- |
 Module      :  Numeric.LinearAlgebra.Tests.Properties
@@ -40,7 +41,7 @@ module Numeric.LinearAlgebra.Tests.Properties (
 ) where
 
 import Numeric.LinearAlgebra
-import Test.QuickCheck
+#include "quickCheckCompat.h"
 -- import Debug.Trace
 
 -- debug x = trace (show x) x