From 38113ad2138652700dc4461cd2d7ab073f9716ac Mon Sep 17 00:00:00 2001
From: Ben Lippmeier <benl@ouroborus.net>
Date: Wed, 8 Dec 2010 07:02:45 +0000
Subject: [PATCH] Add -dppr-colsN to set width of dumps

---
 compiler/main/StaticFlagParser.hs |    1 +
 compiler/main/StaticFlags.hs      |    9 +++++++--
 compiler/utils/Pretty.lhs         |    4 ++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/compiler/main/StaticFlagParser.hs b/compiler/main/StaticFlagParser.hs
index c582626..803baba 100644
--- a/compiler/main/StaticFlagParser.hs
+++ b/compiler/main/StaticFlagParser.hs
@@ -122,6 +122,7 @@ static_flags = [
 
         ------ Debugging ----------------------------------------------------
   , Flag "dppr-debug"                  (PassFlag addOpt)
+  , Flag "dppr-cols"                   (AnySuffix addOpt)
   , Flag "dppr-user-length"            (AnySuffix addOpt)
   , Flag "dppr-case-as-let"            (PassFlag addOpt)
   , Flag "dsuppress-all"               (PassFlag addOpt)
diff --git a/compiler/main/StaticFlags.hs b/compiler/main/StaticFlags.hs
index 8802064..e03d681 100644
--- a/compiler/main/StaticFlags.hs
+++ b/compiler/main/StaticFlags.hs
@@ -21,6 +21,7 @@ module StaticFlags (
 
 	-- Output style options
 	opt_PprUserLength,
+	opt_PprCols,
 	opt_PprCaseAsLet,
 	opt_PprStyle_Debug, opt_TraceLevel,
         opt_NoDebugOutput,
@@ -233,8 +234,12 @@ opt_SuppressTypeSignatures
 
 -- | Display case expressions with a single alternative as strict let bindings
 opt_PprCaseAsLet :: Bool
-opt_PprCaseAsLet
-	= lookUp   (fsLit "-dppr-case-as-let")
+opt_PprCaseAsLet		= lookUp   (fsLit "-dppr-case-as-let")
+
+-- | Set the maximum width of the dumps
+opt_PprCols :: Int
+opt_PprCols			= lookup_def_int "-dppr-cols" 100
+
 
 opt_PprStyle_Debug  :: Bool
 opt_PprStyle_Debug              = lookUp  (fsLit "-dppr-debug")
diff --git a/compiler/utils/Pretty.lhs b/compiler/utils/Pretty.lhs
index 317022d..a518c0b 100644
--- a/compiler/utils/Pretty.lhs
+++ b/compiler/utils/Pretty.lhs
@@ -185,7 +185,7 @@ import BufWrite
 import FastString
 import FastTypes
 import Panic
-
+import StaticFlags
 import Numeric (fromRat)
 import System.IO
 --import Foreign.Ptr (castPtr)
@@ -999,7 +999,7 @@ spaces n | n <=# _ILIT(0) = ""
 
 \begin{code}
 pprCols :: Int
-pprCols = 100 -- could make configurable
+pprCols = opt_PprCols
 
 printDoc :: Mode -> Handle -> Doc -> IO ()
 printDoc LeftMode hdl doc
-- 
1.7.10.4