From: Simon Marlow <simonmar@microsoft.com>
Date: Mon, 7 Aug 2006 15:55:45 +0000 (+0000)
Subject: add traceShow (see #474)
X-Git-Url: http://git.megacz.com/?p=ghc-base.git;a=commitdiff_plain;h=b50e64c6f56695ce4c5b874e36c26db1c62be46e

add traceShow (see #474)
---

diff --git a/Debug/Trace.hs b/Debug/Trace.hs
index 84de4d6..4091521 100644
--- a/Debug/Trace.hs
+++ b/Debug/Trace.hs
@@ -56,3 +56,11 @@ trace :: String -> a -> a
 trace string expr = unsafePerformIO $ do
     putTraceMsg string
     return expr
+
+{-|
+Like 'trace', but uses 'show' on the argument to convert it to a 'String'.
+
+> traceShow = trace . show
+-}
+traceShow :: (Show a) => a -> b -> b
+traceShow = trace . show