Use OPTIONS rather than OPTIONS_GHC for pragmas

[ghc-hetmet.git] / compiler / utils / Pretty.lhs

diff --git a/compiler/utils/Pretty.lhs b/compiler/utils/Pretty.lhs
index ec8f1e7..b873ac7 100644 (file)
--- a/compiler/utils/Pretty.lhs
+++ b/compiler/utils/Pretty.lhs
@@ -87,7 +87,7 @@ Relative to John's original paper, there are the following new features:
     It is Really Useful in practice.
 
 2.  There is a paragraph-fill combinator, fsep, that's much like sep,
-    only it keeps fitting things on one line until itc can't fit any more.
+    only it keeps fitting things on one line until it can't fit any more.
 
 3.  Some random useful extra combinators are provided.  
         <+> puts its arguments beside each other with a space between them,
@@ -152,6 +152,13 @@ Relative to John's original paper, there are the following new features:
 
 
 \begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+-- for details
+
 module Pretty (
         Doc,            -- Abstract
         Mode(..), TextDetails(..),
@@ -162,7 +169,7 @@ module Pretty (
         int, integer, float, double, rational,
         parens, brackets, braces, quotes, doubleQuotes,
         semi, comma, colon, space, equals,
-        lparen, rparen, lbrack, rbrack, lbrace, rbrace,
+        lparen, rparen, lbrack, rbrack, lbrace, rbrace, cparen,
 
         (<>), (<+>), hcat, hsep, 
         ($$), ($+$), vcat, 
@@ -180,12 +187,10 @@ module Pretty (
 import BufWrite
 import FastString
 
-import GLAEXTS
+import GHC.Exts
 
 import Numeric (fromRat)
-import IO
-
-import System.IO       ( hPutBuf )
+import System.IO
 
 import GHC.Base                ( unpackCString# )
 import GHC.Ptr         ( Ptr(..) )
@@ -227,6 +232,7 @@ allow you to use either GHC or Hugs.  To get GHC, just set the CPP variable
 #define GR      >#
 #define GREQ    >=#
 #define LT      <#
+#define LTEQ    <=#
 #define DIV     `quotInt#`
 
 
@@ -447,7 +453,7 @@ int      n = text (show n)
 integer  n = text (show n)
 float    n = text (show n)
 double   n = text (show n)
-rational n = text (show (fromRat n))
+rational n = text (show (fromRat n :: Double))
 --rational n = text (show (fromRationalX n)) -- _showRational 30 n)
 
 quotes p        = char '`' <> p <> char '\''
@@ -456,6 +462,8 @@ parens p        = char '(' <> p <> char ')'
 brackets p      = char '[' <> p <> char ']'
 braces p        = char '{' <> p <> char '}'
 
+cparen True  = parens
+cparen False = id
 
 hcat = foldr (<>)  empty
 hsep = foldr (<+>) empty
@@ -996,11 +1004,11 @@ cant_fail = error "easy_display: NoDoc"
 indent n | n GREQ ILIT(8) = '\t' : indent (n MINUS ILIT(8))
          | otherwise      = spaces n
 
-multi_ch ILIT(0) ch = ""
-multi_ch n       ch = ch : multi_ch (n MINUS ILIT(1)) ch
+multi_ch n ch | n LTEQ ILIT(0) = ""
+             | otherwise      = ch : multi_ch (n MINUS ILIT(1)) ch
 
-spaces ILIT(0) = ""
-spaces n       = ' ' : spaces (n MINUS ILIT(1))
+spaces n | n LTEQ ILIT(0) = ""
+         | otherwise      = ' ' : spaces (n MINUS ILIT(1))
 \end{code}
 
 \begin{code}
@@ -1023,11 +1031,7 @@ printDoc mode hdl doc
   -- some versions of hPutBuf will barf if the length is zero
 hPutLitString handle a# 0# = return ()
 hPutLitString handle a# l#
-#if __GLASGOW_HASKELL__ < 411
-  = hPutBuf handle (A# a#) (I# l#)
-#else
   = hPutBuf handle (Ptr a#) (I# l#)
-#endif
 
 -- Printing output in LeftMode is performance critical: it's used when
 -- dumping C and assembly output, so we allow ourselves a few dirty
@@ -1067,9 +1071,4 @@ layLeft b (TextBeside s sl p)     = put b s >> layLeft b p
     put b (Str s)    = bPutStr  b s
     put b (PStr s)   = bPutFS   b s
     put b (LStr s l) = bPutLitString b s l
-
-#if __GLASGOW_HASKELL__ < 503
-hPutBuf = hPutBufFull
-#endif
-
 \end{code}