2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
5 \section[RdrName]{@RdrName@}
12 mkRdrUnqual, mkRdrQual,
13 mkSrcUnqual, mkSrcQual,
14 mkSysUnqual, mkSysQual,
15 mkPreludeQual, qualifyRdrName,
16 dummyRdrVarName, dummyRdrTcName,
19 rdrNameModule, rdrNameOcc, setRdrNameOcc,
20 isRdrDataCon, isRdrTyVar, isQual, isUnqual
23 #include "HsVersions.h"
25 import OccName ( NameSpace, tcName,
28 mkSrcOccFS, mkSrcVarOcc,
31 import Module ( ModuleName,
32 mkSysModuleFS, mkSrcModuleFS
35 import Util ( thenCmp )
39 %************************************************************************
41 \subsection{The main data type}
43 %************************************************************************
46 data RdrName = RdrName Qual OccName
49 | Qual ModuleName -- The (encoded) module name
53 %************************************************************************
55 \subsection{Simple functions}
57 %************************************************************************
60 rdrNameModule :: RdrName -> ModuleName
61 rdrNameModule (RdrName (Qual m) _) = m
63 rdrNameOcc :: RdrName -> OccName
64 rdrNameOcc (RdrName _ occ) = occ
66 setRdrNameOcc :: RdrName -> OccName -> RdrName
67 setRdrNameOcc (RdrName q _) occ = RdrName q occ
71 -- These two are the basic constructors
72 mkRdrUnqual :: OccName -> RdrName
73 mkRdrUnqual occ = RdrName Unqual occ
75 mkRdrQual :: ModuleName -> OccName -> RdrName
76 mkRdrQual mod occ = RdrName (Qual mod) occ
78 -- These two are used when parsing source files
79 -- They do encode the module and occurrence names
80 mkSrcUnqual :: NameSpace -> FAST_STRING -> RdrName
81 mkSrcUnqual sp n = RdrName Unqual (mkSrcOccFS sp n)
83 mkSrcQual :: NameSpace -> FAST_STRING -> FAST_STRING -> RdrName
84 mkSrcQual sp m n = RdrName (Qual (mkSrcModuleFS m)) (mkSrcOccFS sp n)
86 -- These two are used when parsing interface files
87 -- They do not encode the module and occurrence name
88 mkSysUnqual :: NameSpace -> FAST_STRING -> RdrName
89 mkSysUnqual sp n = RdrName Unqual (mkSysOccFS sp n)
91 mkSysQual :: NameSpace -> (FAST_STRING, FAST_STRING) -> RdrName
92 mkSysQual sp (m,n) = RdrName (Qual (mkSysModuleFS m)) (mkSysOccFS sp n)
94 mkPreludeQual :: NameSpace -> ModuleName -> FAST_STRING -> RdrName
95 mkPreludeQual sp mod n = RdrName (Qual mod) (mkSrcOccFS sp n)
97 qualifyRdrName :: ModuleName -> RdrName -> RdrName
98 qualifyRdrName mod (RdrName Unqual occ) = RdrName (Qual mod) occ
99 qualifyRdrName mod rdr_name = rdr_name
103 -- This guy is used by the reader when HsSyn has a slot for
104 -- an implicit name that's going to be filled in by
105 -- the renamer. We can't just put "error..." because
106 -- we sometimes want to print out stuff after reading but
108 dummyRdrVarName = RdrName Unqual (mkSrcVarOcc SLIT("V-DUMMY"))
109 dummyRdrTcName = RdrName Unqual (mkSrcOccFS tcName SLIT("TC-DUMMY"))
114 isRdrDataCon (RdrName _ occ) = isDataOcc occ
115 isRdrTyVar (RdrName _ occ) = isTvOcc occ
117 isUnqual (RdrName Unqual _) = True
118 isUnqual other = False
120 isQual rdr_name = not (isUnqual rdr_name)
124 %************************************************************************
126 \subsection{Instances}
128 %************************************************************************
131 instance Outputable RdrName where
132 ppr (RdrName qual occ) = pp_qual qual <> ppr occ
134 pp_qual Unqual = empty
135 pp_qual (Qual mod) = ppr mod <> dot
137 instance Eq RdrName where
138 a == b = case (a `compare` b) of { EQ -> True; _ -> False }
139 a /= b = case (a `compare` b) of { EQ -> False; _ -> True }
141 instance Ord RdrName where
142 a <= b = case (a `compare` b) of { LT -> True; EQ -> True; GT -> False }
143 a < b = case (a `compare` b) of { LT -> True; EQ -> False; GT -> False }
144 a >= b = case (a `compare` b) of { LT -> False; EQ -> True; GT -> True }
145 a > b = case (a `compare` b) of { LT -> False; EQ -> False; GT -> True }
147 compare (RdrName q1 o1) (RdrName q2 o2)
148 = (o1 `compare` o2) `thenCmp`
151 cmpQual Unqual Unqual = EQ
152 cmpQual Unqual (Qual _) = LT
153 cmpQual (Qual _) Unqual = GT
154 cmpQual (Qual m1) (Qual m2) = m1 `compare` m2