1 {-% DrIFT (Automatic class derivations for Haskell) v1.1 %-}
3 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
6 \section[RdrName]{@RdrName@}
13 mkRdrUnqual, mkRdrQual, mkRdrOrig, mkRdrUnqual,
14 mkUnqual, mkQual, mkIfaceOrig, mkOrig,
15 qualifyRdrName, unqualifyRdrName, mkRdrNameWkr,
16 dummyRdrVarName, dummyRdrTcName,
19 rdrNameModule, rdrNameOcc, setRdrNameOcc,
20 isRdrDataCon, isRdrTyVar, isRdrTc, isQual, isUnqual, isOrig,
24 emptyRdrEnv, lookupRdrEnv, addListToRdrEnv, rdrEnvElts,
25 extendRdrEnv, rdrEnvToList, elemRdrEnv, foldRdrEnv,
27 -- Printing; instance Outputable RdrName
31 #include "HsVersions.h"
33 import OccName ( NameSpace, tcName,
34 OccName, UserFS, EncodedFS,
37 isDataOcc, isTvOcc, isTcOcc, mkWorkerOcc
39 import Module ( ModuleName,
40 mkSysModuleNameFS, mkModuleNameFS
45 import Util ( thenCmp )
49 %************************************************************************
51 \subsection{The main data type}
53 %************************************************************************
56 data RdrName = RdrName Qual OccName
57 {-! derive: Binary !-}
62 | Qual ModuleName -- A qualified name written by the user in source code
63 -- The module isn't necessarily the module where
64 -- the thing is defined; just the one from which it
67 | Orig ModuleName -- This is an *original* name; the module is the place
68 -- where the thing was defined
69 {-! derive: Binary !-}
74 %************************************************************************
76 \subsection{Simple functions}
78 %************************************************************************
81 rdrNameModule :: RdrName -> ModuleName
82 rdrNameModule (RdrName (Qual m) _) = m
83 rdrNameModule (RdrName (Orig m) _) = m
84 rdrNameModule n = pprPanic "rdrNameModule" (ppr n)
86 rdrNameOcc :: RdrName -> OccName
87 rdrNameOcc (RdrName _ occ) = occ
89 setRdrNameOcc :: RdrName -> OccName -> RdrName
90 setRdrNameOcc (RdrName q _) occ = RdrName q occ
94 -- These two are the basic constructors
95 mkRdrUnqual :: OccName -> RdrName
96 mkRdrUnqual occ = RdrName Unqual occ
98 mkRdrQual :: ModuleName -> OccName -> RdrName
99 mkRdrQual mod occ = RdrName (Qual mod) occ
101 mkRdrOrig :: ModuleName -> OccName -> RdrName
102 mkRdrOrig mod occ = RdrName (Orig mod) occ
104 mkIfaceOrig :: NameSpace -> (EncodedFS, EncodedFS) -> RdrName
105 mkIfaceOrig ns (m,n) = RdrName (Orig (mkSysModuleNameFS m)) (mkSysOccFS ns n)
108 -- These two are used when parsing source files
109 -- They do encode the module and occurrence names
110 mkUnqual :: NameSpace -> UserFS -> RdrName
111 mkUnqual sp n = RdrName Unqual (mkOccFS sp n)
113 mkQual :: NameSpace -> (UserFS, UserFS) -> RdrName
114 mkQual sp (m, n) = RdrName (Qual (mkModuleNameFS m)) (mkOccFS sp n)
116 mkOrig :: NameSpace -> ModuleName -> UserFS -> RdrName
117 mkOrig sp mod n = RdrName (Orig mod) (mkOccFS sp n)
119 qualifyRdrName :: ModuleName -> RdrName -> RdrName
120 -- Sets the module name of a RdrName, even if it has one already
121 qualifyRdrName mod (RdrName _ occ) = RdrName (Qual mod) occ
123 unqualifyRdrName :: RdrName -> RdrName
124 unqualifyRdrName (RdrName _ occ) = RdrName Unqual occ
126 mkRdrNameWkr :: RdrName -> RdrName -- Worker-ify it
127 mkRdrNameWkr (RdrName qual occ) = RdrName qual (mkWorkerOcc occ)
131 -- This guy is used by the reader when HsSyn has a slot for
132 -- an implicit name that's going to be filled in by
133 -- the renamer. We can't just put "error..." because
134 -- we sometimes want to print out stuff after reading but
136 dummyRdrVarName = RdrName Unqual (mkVarOcc FSLIT("V-DUMMY"))
137 dummyRdrTcName = RdrName Unqual (mkOccFS tcName FSLIT("TC-DUMMY"))
142 isRdrDataCon (RdrName _ occ) = isDataOcc occ
143 isRdrTyVar (RdrName _ occ) = isTvOcc occ
144 isRdrTc (RdrName _ occ) = isTcOcc occ
146 isUnqual (RdrName Unqual _) = True
147 isUnqual other = False
149 isQual (RdrName (Qual _) _) = True
152 isOrig (RdrName (Orig _) _) = True
157 %************************************************************************
159 \subsection{Instances}
161 %************************************************************************
164 instance Outputable RdrName where
165 ppr (RdrName qual occ) = pp_qual qual <> ppr occ
167 pp_qual Unqual = empty
168 pp_qual (Qual mod) = ppr mod <> dot
169 pp_qual (Orig mod) = ppr mod <> dot
171 pprUnqualRdrName (RdrName qual occ) = ppr occ
173 instance Eq RdrName where
174 a == b = case (a `compare` b) of { EQ -> True; _ -> False }
175 a /= b = case (a `compare` b) of { EQ -> False; _ -> True }
177 instance Ord RdrName where
178 a <= b = case (a `compare` b) of { LT -> True; EQ -> True; GT -> False }
179 a < b = case (a `compare` b) of { LT -> True; EQ -> False; GT -> False }
180 a >= b = case (a `compare` b) of { LT -> False; EQ -> True; GT -> True }
181 a > b = case (a `compare` b) of { LT -> False; EQ -> False; GT -> True }
183 compare (RdrName q1 o1) (RdrName q2 o2)
184 = (o1 `compare` o2) `thenCmp`
187 cmpQual Unqual Unqual = EQ
188 cmpQual (Qual m1) (Qual m2) = m1 `compare` m2
189 cmpQual (Orig m1) (Orig m2) = m1 `compare` m2
190 cmpQual Unqual _ = LT
191 cmpQual (Qual _) (Orig _) = LT
197 %************************************************************************
199 \subsection{Environment}
201 %************************************************************************
204 type RdrNameEnv a = FiniteMap RdrName a
206 emptyRdrEnv :: RdrNameEnv a
207 lookupRdrEnv :: RdrNameEnv a -> RdrName -> Maybe a
208 addListToRdrEnv :: RdrNameEnv a -> [(RdrName,a)] -> RdrNameEnv a
209 extendRdrEnv :: RdrNameEnv a -> RdrName -> a -> RdrNameEnv a
210 rdrEnvToList :: RdrNameEnv a -> [(RdrName, a)]
211 rdrEnvElts :: RdrNameEnv a -> [a]
212 elemRdrEnv :: RdrName -> RdrNameEnv a -> Bool
213 foldRdrEnv :: (RdrName -> a -> b -> b) -> b -> RdrNameEnv a -> b
215 emptyRdrEnv = emptyFM
216 lookupRdrEnv = lookupFM
217 addListToRdrEnv = addListToFM
219 extendRdrEnv = addToFM
220 rdrEnvToList = fmToList
225 {-* Generated by DrIFT-v1.0 : Look, but Don't Touch. *-}
226 instance Binary RdrName where
227 put_ bh (RdrName aa ab) = do
233 return (RdrName aa ab)
235 instance Binary Qual where
238 put_ bh (Qual aa) = do
241 put_ bh (Orig ab) = do
247 0 -> do return Unqual
253 -- Imported from other files :-