[project @ 1999-01-19 09:55:05 by sof]

Added showBin (binary nums - no, the 'old' showBin & friends hasn't been resurrected)
+ showIntAtBase to export list:

   showBin       :: (Integral a) => a -> ShowS
   showIntAtBase :: Integral a
	         => a            -- base
	         -> (a -> Char)  -- digit to char
	         -> a            -- number to show.
	         -> ShowS

diff --git a/ghc/lib/exts/NumExts.lhs b/ghc/lib/exts/NumExts.lhs
index b3c4fe9..77968f4 100644 (file)
--- a/ghc/lib/exts/NumExts.lhs
+++ b/ghc/lib/exts/NumExts.lhs
@@ -10,8 +10,17 @@ module NumExts
        (
          doubleToFloat   -- :: Double -> Float
        , floatToDouble   -- :: Double -> Float
+
        , showHex         -- :: Integral a => a -> ShowS
        , showOct         -- :: Integral a => a -> ShowS
+       , showBin         -- :: Integral a => a -> ShowS
+
+        -- general purpose number->string converter.
+       , showIntAtBase   -- :: Integral a 
+                        -- => a                -- base
+                        -- -> (a -> Char)      -- digit to char
+                        -- -> a                -- number to show.
+                        -- -> ShowS
        ) where
 
 import Char (ord, chr)
@@ -77,4 +86,10 @@ showOct n r =
  showString "0o" $
  showIntAtBase 8 (toChrOct) n r
  where toChrOct d = chr (ord_0   + fromIntegral d)
+
+showBin :: Integral a => a -> ShowS
+showBin n r = 
+ showString "0b" $
+ showIntAtBase 2 (toChrOct) n r
+ where toChrOct d = chr (ord_0 + fromIntegral d)
 \end{code}