%
\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/Commentary/CodingStyle#Warnings
--- for details
-
module SrcLoc (
SrcLoc, -- Abstract
leftmost_smallest, leftmost_largest, rightmost, spans, isSubspanOf
) where
-#include "HsVersions.h"
-
import Util
import Outputable
import FastString
+import System.FilePath
\end{code}
%************************************************************************
\begin{code}
data SrcLoc
= SrcLoc FastString -- A precise location (file name)
- !Int -- line number, begins at 1
- !Int -- column number, begins at 0
+ {-# UNPACK #-} !Int -- line number, begins at 1
+ {-# UNPACK #-} !Int -- column number, begins at 0
-- Don't ask me why lines start at 1 and columns start at
-- zero. That's just the way it is, so there. --SDM
Things to make 'em:
\begin{code}
+mkSrcLoc :: FastString -> Int -> Int -> SrcLoc
mkSrcLoc x line col = SrcLoc x line col
-noSrcLoc = UnhelpfulLoc FSLIT("<no location info>")
-generatedSrcLoc = UnhelpfulLoc FSLIT("<compiler-generated code>")
-interactiveSrcLoc = UnhelpfulLoc FSLIT("<interactive session>")
+
+noSrcLoc, generatedSrcLoc, interactiveSrcLoc :: SrcLoc
+noSrcLoc = UnhelpfulLoc (fsLit "<no location info>")
+generatedSrcLoc = UnhelpfulLoc (fsLit "<compiler-generated code>")
+interactiveSrcLoc = UnhelpfulLoc (fsLit "<interactive session>")
mkGeneralSrcLoc :: FastString -> SrcLoc
mkGeneralSrcLoc = UnhelpfulLoc
+isGoodSrcLoc :: SrcLoc -> Bool
isGoodSrcLoc (SrcLoc _ _ _) = True
-isGoodSrcLoc other = False
+isGoodSrcLoc _other = False
srcLocFile :: SrcLoc -> FastString
srcLocFile (SrcLoc fname _ _) = fname
-srcLocFile other = FSLIT("<unknown file")
+srcLocFile _other = (fsLit "<unknown file")
srcLocLine :: SrcLoc -> Int
-srcLocLine (SrcLoc _ l c) = l
-srcLocLine other = panic "srcLocLine: unknown line"
+srcLocLine (SrcLoc _ l _) = l
+srcLocLine _other = panic "srcLocLine: unknown line"
srcLocCol :: SrcLoc -> Int
-srcLocCol (SrcLoc _ l c) = c
-srcLocCol other = panic "srcLocCol: unknown col"
+srcLocCol (SrcLoc _ _ c) = c
+srcLocCol _other = panic "srcLocCol: unknown col"
advanceSrcLoc :: SrcLoc -> Char -> SrcLoc
-advanceSrcLoc (SrcLoc f l c) '\n' = SrcLoc f (l + 1) 0
+advanceSrcLoc (SrcLoc f l _) '\n' = SrcLoc f (l + 1) 0
advanceSrcLoc (SrcLoc f l c) _ = SrcLoc f l (c + 1)
advanceSrcLoc loc _ = loc -- Better than nothing
\end{code}
-- SrcLoc is an instance of Ord so that we can sort error messages easily
instance Eq SrcLoc where
loc1 == loc2 = case loc1 `cmpSrcLoc` loc2 of
- EQ -> True
- other -> False
+ EQ -> True
+ _other -> False
instance Ord SrcLoc where
compare = cmpSrcLoc
-
+
+cmpSrcLoc :: SrcLoc -> SrcLoc -> Ordering
cmpSrcLoc (UnhelpfulLoc s1) (UnhelpfulLoc s2) = s1 `compare` s2
-cmpSrcLoc (UnhelpfulLoc _) other = LT
+cmpSrcLoc (UnhelpfulLoc _) _other = LT
cmpSrcLoc (SrcLoc s1 l1 c1) (SrcLoc s2 l2 c2)
= (s1 `compare` s2) `thenCmp` (l1 `compare` l2) `thenCmp` (c1 `compare` c2)
-cmpSrcLoc (SrcLoc _ _ _) other = GT
+cmpSrcLoc (SrcLoc _ _ _) _other = GT
+
+pprFastFilePath :: FastString -> SDoc
+pprFastFilePath path = text $ normalise $ unpackFS path
instance Outputable SrcLoc where
ppr (SrcLoc src_path src_line src_col)
= getPprStyle $ \ sty ->
if userStyle sty || debugStyle sty then
- hcat [ ftext src_path, char ':',
- int src_line,
- char ':', int src_col
- ]
- else
- hcat [text "{-# LINE ", int src_line, space,
- char '\"', ftext src_path, text " #-}"]
+ hcat [ pprFastFilePath src_path, char ':',
+ int src_line,
+ char ':', int src_col
+ ]
+ else
+ hcat [text "{-# LINE ", int src_line, space,
+ char '\"', pprFastFilePath src_path, text " #-}"]
ppr (UnhelpfulLoc s) = ftext s
\end{code}
-}
data SrcSpan
= SrcSpanOneLine -- a common case: a single line
- { srcSpanFile :: FastString,
- srcSpanLine :: !Int,
- srcSpanSCol :: !Int,
- srcSpanECol :: !Int
+ { srcSpanFile :: !FastString,
+ srcSpanLine :: {-# UNPACK #-} !Int,
+ srcSpanSCol :: {-# UNPACK #-} !Int,
+ srcSpanECol :: {-# UNPACK #-} !Int
}
| SrcSpanMultiLine
- { srcSpanFile :: FastString,
- srcSpanSLine :: !Int,
- srcSpanSCol :: !Int,
- srcSpanELine :: !Int,
- srcSpanECol :: !Int
+ { srcSpanFile :: !FastString,
+ srcSpanSLine :: {-# UNPACK #-} !Int,
+ srcSpanSCol :: {-# UNPACK #-} !Int,
+ srcSpanELine :: {-# UNPACK #-} !Int,
+ srcSpanECol :: {-# UNPACK #-} !Int
}
| SrcSpanPoint
- { srcSpanFile :: FastString,
- srcSpanLine :: !Int,
- srcSpanCol :: !Int
+ { srcSpanFile :: !FastString,
+ srcSpanLine :: {-# UNPACK #-} !Int,
+ srcSpanCol :: {-# UNPACK #-} !Int
}
- | UnhelpfulSpan FastString -- Just a general indication
+ | UnhelpfulSpan !FastString -- Just a general indication
-- also used to indicate an empty span
+#ifdef DEBUG
+ deriving (Eq, Show) -- Show is used by Lexer.x, becuase we
+ -- derive Show for Token
+#else
deriving Eq
+#endif
-- We want to order SrcSpans first by the start point, then by the end point.
instance Ord SrcSpan where
(srcSpanStart a `compare` srcSpanStart b) `thenCmp`
(srcSpanEnd a `compare` srcSpanEnd b)
-noSrcSpan = UnhelpfulSpan FSLIT("<no location info>")
-wiredInSrcSpan = UnhelpfulSpan FSLIT("<wired into compiler>")
+noSrcSpan, wiredInSrcSpan :: SrcSpan
+noSrcSpan = UnhelpfulSpan (fsLit "<no location info>")
+wiredInSrcSpan = UnhelpfulSpan (fsLit "<wired into compiler>")
mkGeneralSrcSpan :: FastString -> SrcSpan
mkGeneralSrcSpan = UnhelpfulSpan
+isGoodSrcSpan :: SrcSpan -> Bool
isGoodSrcSpan SrcSpanOneLine{} = True
isGoodSrcSpan SrcSpanMultiLine{} = True
isGoodSrcSpan SrcSpanPoint{} = True
-- They are for internal use only
-- Urk! Some are needed for Lexer.x; see comment in export list
+srcSpanStartLine, srcSpanEndLine, srcSpanStartCol, srcSpanEndCol
+ :: SrcSpan -> Int
+
srcSpanStartLine SrcSpanOneLine{ srcSpanLine=l } = l
srcSpanStartLine SrcSpanMultiLine{ srcSpanSLine=l } = l
srcSpanStartLine SrcSpanPoint{ srcSpanLine=l } = l
srcSpanEndCol _ = panic "SrcLoc.srcSpanEndCol"
--------------------------------------------------------
+srcSpanStart, srcSpanEnd :: SrcSpan -> SrcLoc
+
srcSpanStart (UnhelpfulSpan str) = UnhelpfulLoc str
srcSpanStart s = mkSrcLoc (srcSpanFile s)
(srcSpanStartLine s)
combineSrcSpans :: SrcSpan -> SrcSpan -> SrcSpan
-- Assumes the 'file' part is the same in both
-combineSrcSpans (UnhelpfulSpan str) r = r -- this seems more useful
-combineSrcSpans l (UnhelpfulSpan str) = l
+combineSrcSpans (UnhelpfulSpan _) r = r -- this seems more useful
+combineSrcSpans l (UnhelpfulSpan _) = l
combineSrcSpans start end
= case line1 `compare` line2 of
EQ -> case col1 `compare` col2 of
pprDefnLoc :: SrcSpan -> SDoc
-- "defined at ..."
pprDefnLoc loc
- | isGoodSrcSpan loc = ptext SLIT("Defined at") <+> ppr loc
+ | isGoodSrcSpan loc = ptext (sLit "Defined at") <+> ppr loc
| otherwise = ppr loc
instance Outputable SrcSpan where
ppr span
= getPprStyle $ \ sty ->
if userStyle sty || debugStyle sty then
- pprUserSpan span
- else
- hcat [text "{-# LINE ", int (srcSpanStartLine span), space,
- char '\"', ftext (srcSpanFile span), text " #-}"]
+ pprUserSpan span
+ else
+ hcat [text "{-# LINE ", int (srcSpanStartLine span), space,
+ char '\"', pprFastFilePath $ srcSpanFile span, text " #-}"]
+pprUserSpan :: SrcSpan -> SDoc
pprUserSpan (SrcSpanOneLine src_path line start_col end_col)
- = hcat [ ftext src_path, char ':',
+ = hcat [ pprFastFilePath src_path, char ':',
int line,
char ':', int start_col
]
else char '-' <> int (end_col-1)
pprUserSpan (SrcSpanMultiLine src_path sline scol eline ecol)
- = hcat [ ftext src_path, char ':',
+ = hcat [ pprFastFilePath src_path, char ':',
parens (int sline <> char ',' <> int scol),
char '-',
parens (int eline <> char ',' <>
]
pprUserSpan (SrcSpanPoint src_path line col)
- = hcat [ ftext src_path, char ':',
+ = hcat [ pprFastFilePath src_path, char ':',
int line,
char ':', int col
]
fmap f (L l e) = L l (f e)
instance Outputable e => Outputable (Located e) where
- ppr (L span e) = ppr e
+ ppr (L _ e) = ppr e
-- do we want to dump the span in debugSty mode?
\end{code}
projects / ghc-hetmet.git / blobdiff