[project @ 1999-08-04 10:07:50 by simonmar]

Add a test for a rather misguided use of the Memo library, but which
showed up a bug nevertheless :)

ghc/tests/lib/should_run/Makefile

 #-----------------------------------------------------------------------------
-# $Id: Makefile,v 1.12 1999/06/09 09:35:58 simonpj Exp $
+# $Id: Makefile,v 1.13 1999/08/04 10:07:50 simonmar Exp $
 
 TOP = ../..
 include $(TOP)/mk/boilerplate.mk
@@ -29,6 +29,9 @@ memo001_HC_OPTS		= -syslib misc
 # finalized properly, and stable names are GC'd etc.
 memo001_RUNTEST_OPTS    = +RTS -A10k -G1
 
+memo002_HC_OPTS		= -syslib misc
+memo002_RUNTEST_OPTS	= 20
+
 SRC_MKDEPENDHS_OPTS += -syslib misc -syslib exts 
 
 include $(TOP)/mk/target.mk

ghc/tests/lib/should_run/memo002.hs

+module Main
+where
+
+import Memo
+import System(getArgs)
+
+main = do (arg:_) <- getArgs
+	  mapM_ printTriple [ (i,fib i,mfib i) | i <- [10..read arg] ]
+  where printTriple (i,fi,mfi) = do print i
+				    print fi
+				    print mfi
+				    putStrLn ""
+
+mfib :: Integer -> Integer
+mfib = memo ufib
+
+ufib :: Integer -> Integer
+ufib 0 = 1
+ufib 1 = 1
+ufib n = mfib (n-1) + mfib (n-2)
+
+fib :: Integer -> Integer
+fib 0 = 1
+fib 1 = 1
+fib n = fib (n-1) + fib (n-2)