%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1994
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
%************************************************************************
%* *
%************************************************************************
\begin{code}
-#include "HsVersions.h"
-
module SrcLoc (
- SrcLoc, -- abstract
-
- mkSrcLoc, mkSrcLoc2, -- the usual
- mkUnknownSrcLoc, -- "I'm sorry, I haven't a clue"
- mkIfaceSrcLoc, -- Unknown place in an interface
- -- (this one can die eventually ToDo)
- mkBuiltinSrcLoc, -- something wired into the compiler
- mkGeneratedSrcLoc, -- code generated within the compiler
- unpackSrcLoc
+ SrcLoc, -- Abstract
+
+ mkSrcLoc, isGoodSrcLoc,
+ noSrcLoc, -- "I'm sorry, I haven't a clue"
+
+ importedSrcLoc, -- Unknown place in an interface
+ builtinSrcLoc, -- Something wired into the compiler
+ generatedSrcLoc, -- Code generated within the compiler
+
+ incSrcLine, replaceSrcLine,
+
+ srcLocFile, -- return the file name part.
+ srcLocLine -- return the line part.
) where
-IMP_Ubiq()
+#include "HsVersions.h"
-import PprStyle ( PprStyle(..) )
-import Pretty
+import Util ( thenCmp )
+import Outputable
+import FastString ( unpackFS )
+import FastTypes
+import FastString
+import GlaExts ( (+#) )
\end{code}
%************************************************************************
this is the obvious stuff:
\begin{code}
data SrcLoc
- = SrcLoc FAST_STRING -- source file name
- FAST_STRING -- line number in source file
- | SrcLoc2 FAST_STRING -- same, but w/ an Int line#
- FAST_INT
+ = SrcLoc FastString -- A precise location (file name)
+ FastInt
+
+ | UnhelpfulSrcLoc FastString -- Just a general indication
+
+ | NoSrcLoc
\end{code}
Note that an entity might be imported via more than one route, and
Things to make 'em:
\begin{code}
-mkSrcLoc = SrcLoc
-mkSrcLoc2 x IBOX(y) = SrcLoc2 x y
-mkUnknownSrcLoc = SrcLoc SLIT("<unknown>") SLIT("<unknown>")
-mkIfaceSrcLoc = SrcLoc SLIT("<an interface file>") SLIT("<unknown>")
-mkBuiltinSrcLoc = SrcLoc SLIT("<built-into-the-compiler>") SLIT("<none>")
-mkGeneratedSrcLoc = SrcLoc SLIT("<compiler-generated-code>") SLIT("<none>")
-
-unpackSrcLoc (SrcLoc src_file src_line) = (src_file, src_line)
-unpackSrcLoc (SrcLoc2 src_file src_line) = (src_file, _PK_ (show IBOX(src_line)))
+mkSrcLoc x y = SrcLoc x (iUnbox y)
+noSrcLoc = NoSrcLoc
+importedSrcLoc = UnhelpfulSrcLoc FSLIT("<imported>")
+builtinSrcLoc = UnhelpfulSrcLoc FSLIT("<built-into-the-compiler>")
+generatedSrcLoc = UnhelpfulSrcLoc FSLIT("<compiler-generated-code>")
+
+isGoodSrcLoc (SrcLoc _ _) = True
+isGoodSrcLoc other = False
+
+srcLocFile :: SrcLoc -> FastString
+srcLocFile (SrcLoc fname _) = fname
+
+srcLocLine :: SrcLoc -> FastInt
+srcLocLine (SrcLoc _ l) = l
+
+incSrcLine :: SrcLoc -> SrcLoc
+incSrcLine (SrcLoc s l) = SrcLoc s (l +# 1#)
+incSrcLine loc = loc
+
+replaceSrcLine :: SrcLoc -> FastInt -> SrcLoc
+replaceSrcLine (SrcLoc s _) l = SrcLoc s l
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
-instance Outputable SrcLoc where
- ppr PprForUser (SrcLoc src_file src_line)
- = ppBesides [ ppChar '"', ppPStr src_file, ppPStr SLIT("\", line "), ppPStr src_line ]
+-- 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
- ppr sty (SrcLoc src_file src_line)
- = ppBesides [ppPStr SLIT("{-# LINE "), ppPStr src_line, ppSP,
- ppChar '"', ppPStr src_file, ppPStr SLIT("\" #-}")]
+instance Ord SrcLoc where
+ compare = cmpSrcLoc
+
+cmpSrcLoc NoSrcLoc NoSrcLoc = EQ
+cmpSrcLoc NoSrcLoc other = LT
+
+cmpSrcLoc (UnhelpfulSrcLoc s1) (UnhelpfulSrcLoc s2) = s1 `compare` s2
+cmpSrcLoc (UnhelpfulSrcLoc s1) other = GT
+
+cmpSrcLoc (SrcLoc s1 l1) NoSrcLoc = GT
+cmpSrcLoc (SrcLoc s1 l1) (UnhelpfulSrcLoc _) = LT
+cmpSrcLoc (SrcLoc s1 l1) (SrcLoc s2 l2) = (s1 `compare` s2) `thenCmp` (l1 `cmpline` l2)
+ where
+ l1 `cmpline` l2 | l1 <# l2 = LT
+ | l1 ==# l2 = EQ
+ | otherwise = GT
+
+instance Outputable SrcLoc where
+ ppr (SrcLoc src_path src_line)
+ = getPprStyle $ \ sty ->
+ if userStyle sty || debugStyle sty then
+ hcat [ ftext src_path, char ':', int (iBox src_line) ]
+ else
+ hcat [text "{-# LINE ", int (iBox src_line), space,
+ char '\"', ftext src_path, text " #-}"]
+ where
+ src_file = unpackFS src_path -- Leave the directory prefix intact,
+ -- so emacs can find the file
- ppr sty (SrcLoc2 src_file src_line)
- = ppr sty (SrcLoc src_file (_PK_ (show IBOX(src_line))))
+ ppr (UnhelpfulSrcLoc s) = ftext s
+ ppr NoSrcLoc = ptext SLIT("<No locn>")
\end{code}