module SrcLoc (
SrcLoc, -- Abstract
- mkSrcLoc,
- noSrcLoc, isNoSrcLoc, -- "I'm sorry, I haven't a clue"
+ mkSrcLoc, isGoodSrcLoc, isWiredInLoc,
+ noSrcLoc, -- "I'm sorry, I haven't a clue"
+ advanceSrcLoc,
- mkIfaceSrcLoc, -- Unknown place in an interface
- -- (this one can die eventually ToDo)
+ importedSrcLoc, -- Unknown place in an interface
+ wiredInSrcLoc, -- Something wired into the compiler
+ generatedSrcLoc, -- Code generated within the compiler
- mkBuiltinSrcLoc, -- Something wired into the compiler
-
- mkGeneratedSrcLoc, -- Code generated within the compiler
-
- incSrcLine,
-
- srcLocFile -- return the file name part.
+ srcLocFile, -- return the file name part
+ srcLocLine, -- return the line part
+ srcLocCol, -- return the column part
) where
#include "HsVersions.h"
import Util ( thenCmp )
import Outputable
import FastString ( unpackFS )
-import GlaExts ( Int(..), (+#) )
+import FastTypes
+import FastString
+
+import GLAEXTS ( (+#), quotInt# )
\end{code}
%************************************************************************
this is the obvious stuff:
\begin{code}
data SrcLoc
- = NoSrcLoc
-
- | SrcLoc FAST_STRING -- A precise location (file name)
- FAST_INT
-
- | UnhelpfulSrcLoc FAST_STRING -- Just a general indication
+ = WiredInLoc -- Used exclusively for Ids and TyCons
+ -- that are totally wired in to the
+ -- compiler. That supports the
+ -- occasionally-useful predicate
+ -- isWiredInName
+
+ | SrcLoc FastString -- A precise location (file name)
+ FastInt -- line
+ FastInt -- column
+
+ | UnhelpfulSrcLoc FastString -- Just a general indication
+
+{-
+data SrcSpan
+ = WiredInSpan
+
+ -- A precise source file span
+ | SrcSpan FastString -- file name
+ FastInt -- beginning line
+ FastInt -- beginning column
+ FastInt -- end line
+ FastInt -- end column
+
+ | UnhelpfulSrcSpan FastString -- Just a general indication
+-}
\end{code}
Note that an entity might be imported via more than one route, and
Things to make 'em:
\begin{code}
-noSrcLoc = NoSrcLoc
-mkSrcLoc x IBOX(y) = SrcLoc x y
+mkSrcLoc x line col = SrcLoc x (iUnbox line) (iUnbox col)
+wiredInSrcLoc = WiredInLoc
+noSrcLoc = UnhelpfulSrcLoc FSLIT("<No locn>")
+importedSrcLoc = UnhelpfulSrcLoc FSLIT("<imported>")
+generatedSrcLoc = UnhelpfulSrcLoc FSLIT("<compiler-generated-code>")
+
+isGoodSrcLoc (SrcLoc _ _ _) = True
+isGoodSrcLoc other = False
-mkIfaceSrcLoc = UnhelpfulSrcLoc SLIT("<an interface file>")
-mkBuiltinSrcLoc = UnhelpfulSrcLoc SLIT("<built-into-the-compiler>")
-mkGeneratedSrcLoc = UnhelpfulSrcLoc SLIT("<compiler-generated-code>")
+isWiredInLoc WiredInLoc = True
+isWiredInLoc other = False
-isNoSrcLoc NoSrcLoc = True
-isNoSrcLoc other = False
+srcLocFile :: SrcLoc -> FastString
+srcLocFile (SrcLoc fname _ _) = fname
-srcLocFile :: SrcLoc -> FAST_STRING
-srcLocFile (SrcLoc fname _) = fname
+srcLocLine :: SrcLoc -> Int
+srcLocLine (SrcLoc _ l c) = iBox l
-incSrcLine :: SrcLoc -> SrcLoc
-incSrcLine (SrcLoc s l) = SrcLoc s (l +# 1#)
-incSrcLine loc = loc
+srcLocCol :: SrcLoc -> Int
+srcLocCol (SrcLoc _ l c) = iBox c
+
+advanceSrcLoc :: SrcLoc -> Char -> SrcLoc
+advanceSrcLoc (SrcLoc f l c) '\t' = SrcLoc f l (tab c)
+advanceSrcLoc (SrcLoc f l c) '\n' = SrcLoc f (l +# 1#) 0#
+advanceSrcLoc (SrcLoc f l c) _ = SrcLoc f l (c +# 1#)
+
+-- Advance to the next tab stop. Tabs are at column positions 0, 8, 16, etc.
+tab :: FastInt -> FastInt
+tab c = (c `quotInt#` 8# +# 1#) *# 8#
\end{code}
%************************************************************************
instance Ord SrcLoc where
compare = cmpSrcLoc
-cmpSrcLoc NoSrcLoc NoSrcLoc = EQ
-cmpSrcLoc NoSrcLoc other = LT
+cmpSrcLoc WiredInLoc WiredInLoc = EQ
+cmpSrcLoc WiredInLoc 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
+cmpSrcLoc (SrcLoc _ _ _) WiredInLoc = GT
+cmpSrcLoc (SrcLoc _ _ _) (UnhelpfulSrcLoc _) = LT
+cmpSrcLoc (SrcLoc s1 l1 c1) (SrcLoc s2 l2 c2)
+ = (s1 `compare` s2) `thenCmp` (l1 `cmpline` l2) `thenCmp` (c1 `cmpline` c2)
+ where
+ l1 `cmpline` l2 | l1 <# l2 = LT
+ | l1 ==# l2 = EQ
+ | otherwise = GT
instance Outputable SrcLoc where
- ppr (SrcLoc src_path src_line)
+ ppr (SrcLoc src_path src_line src_col)
= getPprStyle $ \ sty ->
- if userStyle sty then
- hcat [ text src_file, char ':', int IBOX(src_line) ]
- else
- if debugStyle sty then
- hcat [ ptext src_path, char ':', int IBOX(src_line) ]
+ if userStyle sty || debugStyle sty then
+ hcat [ ftext src_path, char ':',
+ int (iBox src_line)
+ {- TODO: char ':', int (iBox src_col) -}
+ ]
else
- hcat [text "{-# LINE ", int IBOX(src_line), space,
- char '\"', ptext src_path, text " #-}"]
+ hcat [text "{-# LINE ", int (iBox src_line), space,
+ char '\"', ftext src_path, text " #-}"]
where
- src_file = remove_directory_prefix (unpackFS src_path)
-
- remove_directory_prefix path = case break (== '/') path of
- (filename, []) -> filename
- (prefix, slash : rest) -> ASSERT( slash == '/' )
- remove_directory_prefix rest
-
- ppr (UnhelpfulSrcLoc s) = ptext s
+ src_file = unpackFS src_path -- Leave the directory prefix intact,
+ -- so emacs can find the file
- ppr NoSrcLoc = text "<NoSrcLoc>"
+ ppr (UnhelpfulSrcLoc s) = ftext s
+ ppr WiredInLoc = ptext SLIT("<Wired in>")
\end{code}
projects / ghc-hetmet.git / blobdiff