1 -----------------------------------------------------------------------------
2 -- The purpose of this module is to transform an HsExpr into a CoreExpr which
3 -- when evaluated, returns a (Meta.Q Meta.Exp) computation analogous to the
4 -- input HsExpr. We do this in the DsM monad, which supplies access to
5 -- CoreExpr's of the "smart constructors" of the Meta.Exp datatype.
7 -- It also defines a bunch of knownKeyNames, in the same way as is done
8 -- in prelude/PrelNames. It's much more convenient to do it here, becuase
9 -- otherwise we have to recompile PrelNames whenever we add a Name, which is
10 -- a Royal Pain (triggers other recompilation).
11 -----------------------------------------------------------------------------
14 module DsMeta( dsBracket, dsReify,
15 templateHaskellNames, qTyConName,
16 liftName, exprTyConName, declTyConName,
17 decTyConName, typTyConName ) where
19 #include "HsVersions.h"
21 import {-# SOURCE #-} DsExpr ( dsExpr )
23 import MatchLit ( dsLit )
24 import DsUtils ( mkListExpr, mkStringLit, mkCoreTup, mkIntExpr )
27 import qualified Language.Haskell.THSyntax as M
29 import HsSyn ( Pat(..), HsExpr(..), Stmt(..), HsLit(..), HsOverLit(..),
30 Match(..), GRHSs(..), GRHS(..), HsBracket(..),
31 HsStmtContext(ListComp,DoExpr), ArithSeqInfo(..),
32 HsBinds(..), MonoBinds(..), HsConDetails(..),
33 TyClDecl(..), HsGroup(..),
34 HsReify(..), ReifyFlavour(..),
35 HsType(..), HsContext(..), HsPred(..), HsTyOp(..),
36 HsTyVarBndr(..), Sig(..), ForeignDecl(..),
37 InstDecl(..), ConDecl(..), BangType(..),
38 PendingSplice, splitHsInstDeclTy,
39 placeHolderType, tyClDeclNames,
40 collectHsBinders, collectPatBinders, collectPatsBinders,
41 hsTyVarName, hsConArgs, getBangType,
45 import PrelNames ( mETA_META_Name, rationalTyConName )
46 import MkIface ( ifaceTyThing )
47 import Name ( Name, nameOccName, nameModule )
48 import OccName ( isDataOcc, isTvOcc, occNameUserString )
49 -- To avoid clashes with DsMeta.varName we must make a local alias for OccName.varName
50 -- we do this by removing varName from the import of OccName above, making
51 -- a qualified instance of OccName and using OccNameAlias.varName where varName
52 -- ws previously used in this file.
53 import qualified OccName( varName, tcName )
55 import Module ( Module, mkThPkgModule, moduleUserString )
56 import Id ( Id, idType )
57 import Name ( mkKnownKeyExternalName )
58 import OccName ( mkOccFS )
61 import Type ( Type, TyThing(..), mkGenTyConApp )
62 import TyCon ( DataConDetails(..) )
63 import TysWiredIn ( stringTy )
65 import CoreUtils ( exprType )
66 import SrcLoc ( noSrcLoc )
67 import Maybe ( catMaybes )
68 import Panic ( panic )
69 import Unique ( mkPreludeTyConUnique, mkPreludeMiscIdUnique )
70 import BasicTypes ( NewOrData(..), StrictnessMark(..), isBoxed )
73 import FastString ( mkFastString )
75 -----------------------------------------------------------------------------
76 dsBracket :: HsBracket Name -> [PendingSplice] -> DsM CoreExpr
77 -- Returns a CoreExpr of type M.Expr
78 -- The quoted thing is parameterised over Name, even though it has
79 -- been type checked. We don't want all those type decorations!
81 dsBracket brack splices
82 = dsExtendMetaEnv new_bit (do_brack brack)
84 new_bit = mkNameEnv [(n, Splice e) | (n,e) <- splices]
86 do_brack (ExpBr e) = do { MkC e1 <- repE e ; return e1 }
87 do_brack (PatBr p) = do { MkC p1 <- repP p ; return p1 }
88 do_brack (TypBr t) = do { MkC t1 <- repTy t ; return t1 }
89 do_brack (DecBr ds) = do { MkC ds1 <- repTopDs ds ; return ds1 }
91 -----------------------------------------------------------------------------
92 dsReify :: HsReify Id -> DsM CoreExpr
93 -- Returns a CoreExpr of type reifyType --> M.Typ
94 -- reifyDecl --> M.Dec
95 -- reifyFixty --> M.Fix
96 dsReify (ReifyOut ReifyType name)
97 = do { thing <- dsLookupGlobal name ;
98 -- By deferring the lookup until now (rather than doing it
99 -- in the type checker) we ensure that all zonking has
102 AnId id -> do { MkC e <- repTy (toHsType (idType id)) ;
104 other -> pprPanic "dsReify: reifyType" (ppr name)
107 dsReify r@(ReifyOut ReifyDecl name)
108 = do { thing <- dsLookupGlobal name ;
109 mb_d <- repTyClD (ifaceTyThing thing) ;
111 Just (MkC d) -> return d
112 Nothing -> pprPanic "dsReify" (ppr r)
115 {- -------------- Examples --------------------
119 gensym (unpackString "x"#) `bindQ` \ x1::String ->
120 lam (pvar x1) (var x1)
123 [| \x -> $(f [| x |]) |]
125 gensym (unpackString "x"#) `bindQ` \ x1::String ->
126 lam (pvar x1) (f (var x1))
130 -------------------------------------------------------
132 -------------------------------------------------------
134 repTopDs :: HsGroup Name -> DsM (Core [M.Decl])
136 = do { let { bndrs = groupBinders group } ;
137 ss <- mkGenSyms bndrs ;
139 decls <- addBinds ss (do {
140 val_ds <- rep_binds (hs_valds group) ;
141 tycl_ds <- mapM repTyClD (hs_tyclds group) ;
142 inst_ds <- mapM repInstD (hs_instds group) ;
144 return (val_ds ++ catMaybes tycl_ds ++ inst_ds) }) ;
146 core_list <- coreList declTyConName decls ;
147 wrapNongenSyms ss core_list
148 -- Do *not* gensym top-level binders
151 groupBinders (HsGroup { hs_valds = val_decls, hs_tyclds = tycl_decls,
152 hs_fords = foreign_decls })
153 -- Collect the binders of a Group
154 = collectHsBinders val_decls ++
155 [n | d <- tycl_decls, (n,_) <- tyClDeclNames d] ++
156 [n | ForeignImport n _ _ _ _ <- foreign_decls]
159 repTyClD :: TyClDecl Name -> DsM (Maybe (Core M.Decl))
161 repTyClD (TyData { tcdND = DataType, tcdCtxt = [],
162 tcdName = tc, tcdTyVars = tvs,
163 tcdCons = DataCons cons, tcdDerivs = mb_derivs })
164 = do { tc1 <- lookupBinder tc ;
166 cons1 <- mapM repC cons ;
167 cons2 <- coreList consTyConName cons1 ;
168 derivs1 <- repDerivs mb_derivs ;
169 dec <- repData tc1 tvs1 cons2 derivs1 ;
172 repTyClD (ClassDecl { tcdCtxt = cxt, tcdName = cls,
173 tcdTyVars = tvs, tcdFDs = [],
174 tcdSigs = sigs, tcdMeths = Just binds
176 = do { cls1 <- lookupBinder cls ;
178 cxt1 <- repCtxt cxt ;
179 sigs1 <- rep_sigs sigs ;
180 binds1 <- rep_monobind binds ;
181 decls1 <- coreList declTyConName (sigs1 ++ binds1) ;
182 dec <- repClass cxt1 cls1 tvs1 decls1 ;
186 repTyClD d = do { addDsWarn (hang msg 4 (ppr d)) ;
190 msg = ptext SLIT("Cannot desugar this Template Haskell declaration:")
192 repInstD (InstDecl ty binds _ _ loc)
193 -- Ignore user pragmas for now
194 = do { cxt1 <- repCtxt cxt ;
195 inst_ty1 <- repPred (HsClassP cls tys) ;
196 binds1 <- rep_monobind binds ;
197 decls1 <- coreList declTyConName binds1 ;
198 repInst cxt1 inst_ty1 decls1 }
200 (tvs, cxt, cls, tys) = splitHsInstDeclTy ty
203 -------------------------------------------------------
205 -------------------------------------------------------
207 repC :: ConDecl Name -> DsM (Core M.Cons)
208 repC (ConDecl con [] [] details loc)
209 = do { con1 <- lookupBinder con ;
210 arg_tys <- mapM (repBangTy con) (hsConArgs details) ;
211 arg_tys1 <- coreList typeTyConName arg_tys ;
212 repConstr con1 arg_tys1 }
214 repBangTy con (BangType NotMarkedStrict ty) = repTy ty
215 repBangTy con bty = do { addDsWarn msg ; repTy (getBangType bty) }
217 msg = ptext SLIT("Ignoring stricness on argument of constructor")
220 -------------------------------------------------------
222 -------------------------------------------------------
224 repDerivs :: Maybe (HsContext Name) -> DsM (Core [String])
225 repDerivs Nothing = return (coreList' stringTy [])
226 repDerivs (Just ctxt)
227 = do { strs <- mapM rep_deriv ctxt ;
228 return (coreList' stringTy strs) }
230 rep_deriv :: HsPred Name -> DsM (Core String)
231 -- Deriving clauses must have the simple H98 form
232 rep_deriv (HsClassP cls []) = lookupOcc cls
233 rep_deriv other = panic "rep_deriv"
236 -------------------------------------------------------
237 -- Signatures in a class decl, or a group of bindings
238 -------------------------------------------------------
240 rep_sigs :: [Sig Name] -> DsM [Core M.Decl]
241 -- We silently ignore ones we don't recognise
242 rep_sigs sigs = do { sigs1 <- mapM rep_sig sigs ;
243 return (concat sigs1) }
245 rep_sig :: Sig Name -> DsM [Core M.Decl]
247 -- Empty => Too hard, signature ignored
248 rep_sig (ClassOpSig nm _ ty _) = rep_proto nm ty
249 rep_sig (Sig nm ty _) = rep_proto nm ty
250 rep_sig other = return []
252 rep_proto nm ty = do { nm1 <- lookupBinder nm ;
254 sig <- repProto nm1 ty1 ;
258 -------------------------------------------------------
260 -------------------------------------------------------
262 repTvs :: [HsTyVarBndr Name] -> DsM (Core [String])
263 repTvs tvs = do { tvs1 <- mapM (localVar . hsTyVarName) tvs ;
264 return (coreList' stringTy tvs1) }
267 repCtxt :: HsContext Name -> DsM (Core M.Ctxt)
268 repCtxt ctxt = do { preds <- mapM repPred ctxt;
269 coreList typeTyConName preds }
272 repPred :: HsPred Name -> DsM (Core M.Type)
273 repPred (HsClassP cls tys)
274 = do { tc1 <- lookupOcc cls; tcon <- repNamedTyCon tc1;
275 tys1 <- repTys tys; repTapps tcon tys1 }
276 repPred (HsIParam _ _) = panic "No implicit parameters yet"
279 repTys :: [HsType Name] -> DsM [Core M.Type]
280 repTys tys = mapM repTy tys
283 repTy :: HsType Name -> DsM (Core M.Type)
286 | isTvOcc (nameOccName n) = do { tv1 <- localVar n ; repTvar tv1 }
287 | otherwise = do { tc1 <- lookupOcc n; repNamedTyCon tc1 }
288 repTy (HsAppTy f a) = do { f1 <- repTy f ; a1 <- repTy a ; repTapp f1 a1 }
289 repTy (HsFunTy f a) = do { f1 <- repTy f ; a1 <- repTy a ;
290 tcon <- repArrowTyCon ; repTapps tcon [f1,a1] }
291 repTy (HsListTy t) = do { t1 <- repTy t ; tcon <- repListTyCon ; repTapp tcon t1 }
292 repTy (HsTupleTy tc tys) = do { tys1 <- repTys tys;
293 tcon <- repTupleTyCon (length tys);
295 repTy (HsOpTy ty1 HsArrow ty2) = repTy (HsFunTy ty1 ty2)
296 repTy (HsOpTy ty1 (HsTyOp n) ty2) = repTy ((HsTyVar n `HsAppTy` ty1) `HsAppTy` ty2)
297 repTy (HsParTy t) = repTy t
298 repTy (HsPredTy (HsClassP c tys)) = repTy (foldl HsAppTy (HsTyVar c) tys)
300 repTy other_ty = pprPanic "repTy" (ppr other_ty) -- HsForAllTy, HsKindSig
302 -----------------------------------------------------------------------------
304 -----------------------------------------------------------------------------
306 repEs :: [HsExpr Name] -> DsM (Core [M.Expr])
307 repEs es = do { es' <- mapM repE es ;
308 coreList exprTyConName es' }
310 -- FIXME: some of these panics should be converted into proper error messages
311 -- unless we can make sure that constructs, which are plainly not
312 -- supported in TH already lead to error messages at an earlier stage
313 repE :: HsExpr Name -> DsM (Core M.Expr)
315 do { mb_val <- dsLookupMetaEnv x
317 Nothing -> do { str <- globalVar x
318 ; repVarOrCon x str }
319 Just (Bound y) -> repVarOrCon x (coreVar y)
320 Just (Splice e) -> do { e' <- dsExpr e
321 ; return (MkC e') } }
322 repE (HsIPVar x) = panic "DsMeta.repE: Can't represent implicit parameters"
324 -- Remember, we're desugaring renamer output here, so
325 -- HsOverlit can definitely occur
326 repE (HsOverLit l) = do { a <- repOverloadedLiteral l; repLit a }
327 repE (HsLit l) = do { a <- repLiteral l; repLit a }
328 repE (HsLam m) = repLambda m
329 repE (HsApp x y) = do {a <- repE x; b <- repE y; repApp a b}
331 repE (OpApp e1 op fix e2) =
333 HsVar op -> do { arg1 <- repE e1;
335 the_op <- lookupOcc op ;
336 repInfixApp arg1 the_op arg2 }
337 _ -> panic "DsMeta.repE: Operator is not a variable"
338 repE (NegApp x nm) = repE x >>= repNeg
339 repE (HsPar x) = repE x
340 repE (SectionL x y) = do { a <- repE x; b <- repE y; repSectionL a b }
341 repE (SectionR x y) = do { a <- repE x; b <- repE y; repSectionR a b }
342 repE (HsCase e ms loc) = do { arg <- repE e
343 ; ms2 <- mapM repMatchTup ms
344 ; repCaseE arg (nonEmptyCoreList ms2) }
345 repE (HsIf x y z loc) = do
350 repE (HsLet bs e) = do { (ss,ds) <- repBinds bs
351 ; e2 <- addBinds ss (repE e)
353 ; wrapGenSyns expTyConName ss z }
354 -- FIXME: I haven't got the types here right yet
355 repE (HsDo ctxt sts _ ty loc)
356 | isComprCtxt ctxt = do { (ss,zs) <- repSts sts;
357 e <- repDoE (nonEmptyCoreList zs);
358 wrapGenSyns expTyConName ss e }
360 panic "DsMeta.repE: Can't represent mdo and [: :] yet"
362 isComprCtxt ListComp = True
363 isComprCtxt DoExpr = True
364 isComprCtxt _ = False
365 repE (ExplicitList ty es) = do { xs <- repEs es; repListExp xs }
366 repE (ExplicitPArr ty es) =
367 panic "DsMeta.repE: No explicit parallel arrays yet"
368 repE (ExplicitTuple es boxed)
369 | isBoxed boxed = do { xs <- repEs es; repTup xs }
370 | otherwise = panic "DsMeta.repE: Can't represent unboxed tuples"
371 repE (RecordConOut _ _ _) = panic "DsMeta.repE: No record construction yet"
372 repE (RecordUpdOut _ _ _ _) = panic "DsMeta.repE: No record update yet"
374 repE (ExprWithTySig e ty) = do { e1 <- repE e; t1 <- repTy ty; repSigExp e1 t1 }
375 repE (ArithSeqOut _ aseq) =
377 From e -> do { ds1 <- repE e; repFrom ds1 }
386 FromThenTo e1 e2 e3 -> do
390 repFromThenTo ds1 ds2 ds3
391 repE (PArrSeqOut _ aseq) = panic "DsMeta.repE: parallel array seq.s missing"
392 repE (HsCCall _ _ _ _ _) = panic "DsMeta.repE: Can't represent __ccall__"
393 repE (HsSCC _ _) = panic "DsMeta.repE: Can't represent SCC"
394 repE (HsBracketOut _ _) =
395 panic "DsMeta.repE: Can't represent Oxford brackets"
396 repE (HsSplice n e loc) = do { mb_val <- dsLookupMetaEnv n
398 Just (Splice e) -> do { e' <- dsExpr e
400 other -> pprPanic "HsSplice" (ppr n) }
401 repE (HsReify _) = panic "DsMeta.repE: Can't represent reification"
403 pprPanic "DsMeta.repE: Illegal expression form" (ppr e)
405 -----------------------------------------------------------------------------
406 -- Building representations of auxillary structures like Match, Clause, Stmt,
408 repMatchTup :: Match Name -> DsM (Core M.Mtch)
409 repMatchTup (Match [p] ty (GRHSs guards wheres ty2)) =
410 do { ss1 <- mkGenSyms (collectPatBinders p)
411 ; addBinds ss1 $ do {
413 ; (ss2,ds) <- repBinds wheres
414 ; addBinds ss2 $ do {
415 ; gs <- repGuards guards
416 ; match <- repMatch p1 gs ds
417 ; wrapGenSyns matTyConName (ss1++ss2) match }}}
419 repClauseTup :: Match Name -> DsM (Core M.Clse)
420 repClauseTup (Match ps ty (GRHSs guards wheres ty2)) =
421 do { ss1 <- mkGenSyms (collectPatsBinders ps)
422 ; addBinds ss1 $ do {
424 ; (ss2,ds) <- repBinds wheres
425 ; addBinds ss2 $ do {
426 gs <- repGuards guards
427 ; clause <- repClause ps1 gs ds
428 ; wrapGenSyns clsTyConName (ss1++ss2) clause }}}
430 repGuards :: [GRHS Name] -> DsM (Core M.Rihs)
431 repGuards [GRHS [ResultStmt e loc] loc2]
432 = do {a <- repE e; repNormal a }
434 = do { zs <- mapM process other;
435 repGuarded (nonEmptyCoreList (map corePair zs)) }
437 process (GRHS [ExprStmt e1 ty loc,ResultStmt e2 _] _)
438 = do { x <- repE e1; y <- repE e2; return (x, y) }
439 process other = panic "Non Haskell 98 guarded body"
442 -----------------------------------------------------------------------------
443 -- Representing Stmt's is tricky, especially if bound variables
444 -- shaddow each other. Consider: [| do { x <- f 1; x <- f x; g x } |]
445 -- First gensym new names for every variable in any of the patterns.
446 -- both static (x'1 and x'2), and dynamic ((gensym "x") and (gensym "y"))
447 -- if variables didn't shaddow, the static gensym wouldn't be necessary
448 -- and we could reuse the original names (x and x).
450 -- do { x'1 <- gensym "x"
451 -- ; x'2 <- gensym "x"
452 -- ; doE [ BindSt (pvar x'1) [| f 1 |]
453 -- , BindSt (pvar x'2) [| f x |]
454 -- , NoBindSt [| g x |]
458 -- The strategy is to translate a whole list of do-bindings by building a
459 -- bigger environment, and a bigger set of meta bindings
460 -- (like: x'1 <- gensym "x" ) and then combining these with the translations
461 -- of the expressions within the Do
463 -----------------------------------------------------------------------------
464 -- The helper function repSts computes the translation of each sub expression
465 -- and a bunch of prefix bindings denoting the dynamic renaming.
467 repSts :: [Stmt Name] -> DsM ([GenSymBind], [Core M.Stmt])
468 repSts [ResultStmt e loc] =
470 ; e1 <- repNoBindSt a
471 ; return ([], [e1]) }
472 repSts (BindStmt p e loc : ss) =
474 ; ss1 <- mkGenSyms (collectPatBinders p)
475 ; addBinds ss1 $ do {
477 ; (ss2,zs) <- repSts ss
478 ; z <- repBindSt p1 e2
479 ; return (ss1++ss2, z : zs) }}
480 repSts (LetStmt bs : ss) =
481 do { (ss1,ds) <- repBinds bs
483 ; (ss2,zs) <- addBinds ss1 (repSts ss)
484 ; return (ss1++ss2, z : zs) }
485 repSts (ExprStmt e ty loc : ss) =
487 ; z <- repNoBindSt e2
488 ; (ss2,zs) <- repSts ss
489 ; return (ss2, z : zs) }
490 repSts other = panic "Exotic Stmt in meta brackets"
493 -----------------------------------------------------------
495 -----------------------------------------------------------
497 repBinds :: HsBinds Name -> DsM ([GenSymBind], Core [M.Decl])
499 = do { let { bndrs = collectHsBinders decs } ;
500 ss <- mkGenSyms bndrs ;
501 core <- addBinds ss (rep_binds decs) ;
502 core_list <- coreList declTyConName core ;
503 return (ss, core_list) }
505 rep_binds :: HsBinds Name -> DsM [Core M.Decl]
506 rep_binds EmptyBinds = return []
507 rep_binds (ThenBinds x y)
508 = do { core1 <- rep_binds x
509 ; core2 <- rep_binds y
510 ; return (core1 ++ core2) }
511 rep_binds (MonoBind bs sigs _)
512 = do { core1 <- rep_monobind bs
513 ; core2 <- rep_sigs sigs
514 ; return (core1 ++ core2) }
515 rep_binds (IPBinds _ _)
516 = panic "DsMeta:repBinds: can't do implicit parameters"
518 rep_monobind :: MonoBinds Name -> DsM [Core M.Decl]
519 rep_monobind EmptyMonoBinds = return []
520 rep_monobind (AndMonoBinds x y) = do { x1 <- rep_monobind x;
521 y1 <- rep_monobind y;
524 -- Note GHC treats declarations of a variable (not a pattern)
525 -- e.g. x = g 5 as a Fun MonoBinds. This is indicated by a single match
526 -- with an empty list of patterns
527 rep_monobind (FunMonoBind fn infx [Match [] ty (GRHSs guards wheres ty2)] loc)
528 = do { (ss,wherecore) <- repBinds wheres
529 ; guardcore <- addBinds ss (repGuards guards)
530 ; fn' <- lookupBinder fn
532 ; ans <- repVal p guardcore wherecore
535 rep_monobind (FunMonoBind fn infx ms loc)
536 = do { ms1 <- mapM repClauseTup ms
537 ; fn' <- lookupBinder fn
538 ; ans <- repFun fn' (nonEmptyCoreList ms1)
541 rep_monobind (PatMonoBind pat (GRHSs guards wheres ty2) loc)
542 = do { patcore <- repP pat
543 ; (ss,wherecore) <- repBinds wheres
544 ; guardcore <- addBinds ss (repGuards guards)
545 ; ans <- repVal patcore guardcore wherecore
548 rep_monobind (VarMonoBind v e)
549 = do { v' <- lookupBinder v
552 ; patcore <- repPvar v'
553 ; empty_decls <- coreList declTyConName []
554 ; ans <- repVal patcore x empty_decls
557 -----------------------------------------------------------------------------
558 -- Since everything in a MonoBind is mutually recursive we need rename all
559 -- all the variables simultaneously. For example:
560 -- [| AndMonoBinds (f x = x + g 2) (g x = f 1 + 2) |] would translate to
561 -- do { f'1 <- gensym "f"
562 -- ; g'2 <- gensym "g"
563 -- ; [ do { x'3 <- gensym "x"; fun f'1 [pvar x'3] [| x + g2 |]},
564 -- do { x'4 <- gensym "x"; fun g'2 [pvar x'4] [| f 1 + 2 |]}
566 -- This requires collecting the bindings (f'1 <- gensym "f"), and the
567 -- environment ( f |-> f'1 ) from each binding, and then unioning them
568 -- together. As we do this we collect GenSymBinds's which represent the renamed
569 -- variables bound by the Bindings. In order not to lose track of these
570 -- representations we build a shadow datatype MB with the same structure as
571 -- MonoBinds, but which has slots for the representations
574 -----------------------------------------------------------------------------
575 -- GHC allows a more general form of lambda abstraction than specified
576 -- by Haskell 98. In particular it allows guarded lambda's like :
577 -- (\ x | even x -> 0 | odd x -> 1) at the moment we can't represent this in
578 -- Haskell Template's Meta.Exp type so we punt if it isn't a simple thing like
579 -- (\ p1 .. pn -> exp) by causing an error.
581 repLambda :: Match Name -> DsM (Core M.Expr)
582 repLambda (Match ps _ (GRHSs [GRHS [ResultStmt e _ ] _ ]
584 = do { let bndrs = collectPatsBinders ps ;
585 ; ss <- mkGenSyms bndrs
586 ; lam <- addBinds ss (
587 do { xs <- repPs ps; body <- repE e; repLam xs body })
588 ; wrapGenSyns expTyConName ss lam }
590 repLambda z = panic "Can't represent a guarded lambda in Template Haskell"
593 -----------------------------------------------------------------------------
595 -- repP deals with patterns. It assumes that we have already
596 -- walked over the pattern(s) once to collect the binders, and
597 -- have extended the environment. So every pattern-bound
598 -- variable should already appear in the environment.
600 -- Process a list of patterns
601 repPs :: [Pat Name] -> DsM (Core [M.Patt])
602 repPs ps = do { ps' <- mapM repP ps ;
603 coreList pattTyConName ps' }
605 repP :: Pat Name -> DsM (Core M.Patt)
606 repP (WildPat _) = repPwild
607 repP (LitPat l) = do { l2 <- repLiteral l; repPlit l2 }
608 repP (VarPat x) = do { x' <- lookupBinder x; repPvar x' }
609 repP (LazyPat p) = do { p1 <- repP p; repPtilde p1 }
610 repP (AsPat x p) = do { x' <- lookupBinder x; p1 <- repP p; repPaspat x' p1 }
611 repP (ParPat p) = repP p
612 repP (ListPat ps _) = repListPat ps
613 repP (TuplePat ps _) = do { qs <- repPs ps; repPtup qs }
614 repP (ConPatIn dc details)
615 = do { con_str <- lookupOcc dc
617 PrefixCon ps -> do { qs <- repPs ps; repPcon con_str qs }
618 RecCon pairs -> error "No records in template haskell yet"
619 InfixCon p1 p2 -> do { qs <- repPs [p1,p2]; repPcon con_str qs }
621 repP other = panic "Exotic pattern inside meta brackets"
623 repListPat :: [Pat Name] -> DsM (Core M.Patt)
624 repListPat [] = do { nil_con <- coreStringLit "[]"
625 ; nil_args <- coreList pattTyConName []
626 ; repPcon nil_con nil_args }
627 repListPat (p:ps) = do { p2 <- repP p
628 ; ps2 <- repListPat ps
629 ; cons_con <- coreStringLit ":"
630 ; repPcon cons_con (nonEmptyCoreList [p2,ps2]) }
633 ----------------------------------------------------------
634 -- The meta-environment
636 type GenSymBind = (Name, Id) -- Gensym the string and bind it to the Id
637 -- I.e. (x, x_id) means
638 -- let x_id = gensym "x" in ...
640 addBinds :: [GenSymBind] -> DsM a -> DsM a
641 addBinds bs m = dsExtendMetaEnv (mkNameEnv [(n,Bound id) | (n,id) <- bs]) m
643 lookupBinder :: Name -> DsM (Core String)
645 = do { mb_val <- dsLookupMetaEnv n;
647 Just (Bound id) -> return (MkC (Var id))
648 other -> pprPanic "Failed binder lookup:" (ppr n) }
650 mkGenSym :: Name -> DsM GenSymBind
651 mkGenSym nm = do { id <- newUniqueId nm stringTy; return (nm,id) }
653 mkGenSyms :: [Name] -> DsM [GenSymBind]
654 mkGenSyms ns = mapM mkGenSym ns
656 lookupType :: Name -- Name of type constructor (e.g. M.Expr)
657 -> DsM Type -- The type
658 lookupType tc_name = do { tc <- dsLookupTyCon tc_name ;
659 return (mkGenTyConApp tc []) }
661 -- wrapGenSyns [(nm1,id1), (nm2,id2)] y
662 -- --> bindQ (gensym nm1) (\ id1 ->
663 -- bindQ (gensym nm2 (\ id2 ->
666 wrapGenSyns :: Name -- Name of the type (consructor) for 'a'
668 -> Core (M.Q a) -> DsM (Core (M.Q a))
669 wrapGenSyns tc_name binds body@(MkC b)
670 = do { elt_ty <- lookupType tc_name
673 go elt_ty [] = return body
674 go elt_ty ((name,id) : binds)
675 = do { MkC body' <- go elt_ty binds
676 ; lit_str <- localVar name
677 ; gensym_app <- repGensym lit_str
678 ; repBindQ stringTy elt_ty
679 gensym_app (MkC (Lam id body')) }
681 -- Just like wrapGenSym, but don't actually do the gensym
682 -- Instead use the existing name
683 -- Only used for [Decl]
684 wrapNongenSyms :: [GenSymBind]
685 -> Core [M.Decl] -> DsM (Core [M.Decl])
686 wrapNongenSyms binds body@(MkC b)
690 go ((name,id) : binds)
691 = do { MkC body' <- go binds
692 ; MkC lit_str <- localVar name -- No gensym
693 ; return (MkC (Let (NonRec id lit_str) body'))
696 void = placeHolderType
698 string :: String -> HsExpr Id
699 string s = HsLit (HsString (mkFastString s))
702 -- %*********************************************************************
706 -- %*********************************************************************
708 -----------------------------------------------------------------------------
709 -- PHANTOM TYPES for consistency. In order to make sure we do this correct
710 -- we invent a new datatype which uses phantom types.
712 newtype Core a = MkC CoreExpr
715 rep2 :: Name -> [ CoreExpr ] -> DsM (Core a)
716 rep2 n xs = do { id <- dsLookupGlobalId n
717 ; return (MkC (foldl App (Var id) xs)) }
719 -- Then we make "repConstructors" which use the phantom types for each of the
720 -- smart constructors of the Meta.Meta datatypes.
723 -- %*********************************************************************
725 -- The 'smart constructors'
727 -- %*********************************************************************
729 --------------- Patterns -----------------
730 repPlit :: Core M.Lit -> DsM (Core M.Patt)
731 repPlit (MkC l) = rep2 plitName [l]
733 repPvar :: Core String -> DsM (Core M.Patt)
734 repPvar (MkC s) = rep2 pvarName [s]
736 repPtup :: Core [M.Patt] -> DsM (Core M.Patt)
737 repPtup (MkC ps) = rep2 ptupName [ps]
739 repPcon :: Core String -> Core [M.Patt] -> DsM (Core M.Patt)
740 repPcon (MkC s) (MkC ps) = rep2 pconName [s, ps]
742 repPtilde :: Core M.Patt -> DsM (Core M.Patt)
743 repPtilde (MkC p) = rep2 ptildeName [p]
745 repPaspat :: Core String -> Core M.Patt -> DsM (Core M.Patt)
746 repPaspat (MkC s) (MkC p) = rep2 paspatName [s, p]
748 repPwild :: DsM (Core M.Patt)
749 repPwild = rep2 pwildName []
751 --------------- Expressions -----------------
752 repVarOrCon :: Name -> Core String -> DsM (Core M.Expr)
753 repVarOrCon vc str | isDataOcc (nameOccName vc) = repCon str
754 | otherwise = repVar str
756 repVar :: Core String -> DsM (Core M.Expr)
757 repVar (MkC s) = rep2 varName [s]
759 repCon :: Core String -> DsM (Core M.Expr)
760 repCon (MkC s) = rep2 conName [s]
762 repLit :: Core M.Lit -> DsM (Core M.Expr)
763 repLit (MkC c) = rep2 litName [c]
765 repApp :: Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
766 repApp (MkC x) (MkC y) = rep2 appName [x,y]
768 repLam :: Core [M.Patt] -> Core M.Expr -> DsM (Core M.Expr)
769 repLam (MkC ps) (MkC e) = rep2 lamName [ps, e]
771 repTup :: Core [M.Expr] -> DsM (Core M.Expr)
772 repTup (MkC es) = rep2 tupName [es]
774 repCond :: Core M.Expr -> Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
775 repCond (MkC x) (MkC y) (MkC z) = rep2 condName [x,y,z]
777 repLetE :: Core [M.Decl] -> Core M.Expr -> DsM (Core M.Expr)
778 repLetE (MkC ds) (MkC e) = rep2 letEName [ds, e]
780 repCaseE :: Core M.Expr -> Core [M.Mtch] -> DsM( Core M.Expr)
781 repCaseE (MkC e) (MkC ms) = rep2 caseEName [e, ms]
783 repDoE :: Core [M.Stmt] -> DsM (Core M.Expr)
784 repDoE (MkC ss) = rep2 doEName [ss]
786 repComp :: Core [M.Stmt] -> DsM (Core M.Expr)
787 repComp (MkC ss) = rep2 compName [ss]
789 repListExp :: Core [M.Expr] -> DsM (Core M.Expr)
790 repListExp (MkC es) = rep2 listExpName [es]
792 repSigExp :: Core M.Expr -> Core M.Type -> DsM (Core M.Expr)
793 repSigExp (MkC e) (MkC t) = rep2 sigExpName [e,t]
795 repInfixApp :: Core M.Expr -> Core String -> Core M.Expr -> DsM (Core M.Expr)
796 repInfixApp (MkC x) (MkC y) (MkC z) = rep2 infixAppName [x,y,z]
798 repNeg :: Core M.Expr -> DsM (Core M.Expr)
799 repNeg (MkC x) = rep2 negName [x]
801 repSectionL :: Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
802 repSectionL (MkC x) (MkC y) = rep2 infixAppName [x,y]
804 repSectionR :: Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
805 repSectionR (MkC x) (MkC y) = rep2 infixAppName [x,y]
807 ------------ Right hand sides (guarded expressions) ----
808 repGuarded :: Core [(M.Expr, M.Expr)] -> DsM (Core M.Rihs)
809 repGuarded (MkC pairs) = rep2 guardedName [pairs]
811 repNormal :: Core M.Expr -> DsM (Core M.Rihs)
812 repNormal (MkC e) = rep2 normalName [e]
814 ------------- Statements -------------------
815 repBindSt :: Core M.Patt -> Core M.Expr -> DsM (Core M.Stmt)
816 repBindSt (MkC p) (MkC e) = rep2 bindStName [p,e]
818 repLetSt :: Core [M.Decl] -> DsM (Core M.Stmt)
819 repLetSt (MkC ds) = rep2 letStName [ds]
821 repNoBindSt :: Core M.Expr -> DsM (Core M.Stmt)
822 repNoBindSt (MkC e) = rep2 noBindStName [e]
824 -------------- DotDot (Arithmetic sequences) -----------
825 repFrom :: Core M.Expr -> DsM (Core M.Expr)
826 repFrom (MkC x) = rep2 fromName [x]
828 repFromThen :: Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
829 repFromThen (MkC x) (MkC y) = rep2 fromThenName [x,y]
831 repFromTo :: Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
832 repFromTo (MkC x) (MkC y) = rep2 fromToName [x,y]
834 repFromThenTo :: Core M.Expr -> Core M.Expr -> Core M.Expr -> DsM (Core M.Expr)
835 repFromThenTo (MkC x) (MkC y) (MkC z) = rep2 fromThenToName [x,y,z]
837 ------------ Match and Clause Tuples -----------
838 repMatch :: Core M.Patt -> Core M.Rihs -> Core [M.Decl] -> DsM (Core M.Mtch)
839 repMatch (MkC p) (MkC bod) (MkC ds) = rep2 matchName [p, bod, ds]
841 repClause :: Core [M.Patt] -> Core M.Rihs -> Core [M.Decl] -> DsM (Core M.Clse)
842 repClause (MkC ps) (MkC bod) (MkC ds) = rep2 clauseName [ps, bod, ds]
844 -------------- Dec -----------------------------
845 repVal :: Core M.Patt -> Core M.Rihs -> Core [M.Decl] -> DsM (Core M.Decl)
846 repVal (MkC p) (MkC b) (MkC ds) = rep2 valName [p, b, ds]
848 repFun :: Core String -> Core [M.Clse] -> DsM (Core M.Decl)
849 repFun (MkC nm) (MkC b) = rep2 funName [nm, b]
851 repData :: Core String -> Core [String] -> Core [M.Cons] -> Core [String] -> DsM (Core M.Decl)
852 repData (MkC nm) (MkC tvs) (MkC cons) (MkC derivs) = rep2 dataDName [nm, tvs, cons, derivs]
854 repInst :: Core M.Ctxt -> Core M.Type -> Core [M.Decl] -> DsM (Core M.Decl)
855 repInst (MkC cxt) (MkC ty) (MkC ds) = rep2 instName [cxt, ty, ds]
857 repClass :: Core M.Ctxt -> Core String -> Core [String] -> Core [M.Decl] -> DsM (Core M.Decl)
858 repClass (MkC cxt) (MkC cls) (MkC tvs) (MkC ds) = rep2 classDName [cxt, cls, tvs, ds]
860 repProto :: Core String -> Core M.Type -> DsM (Core M.Decl)
861 repProto (MkC s) (MkC ty) = rep2 protoName [s, ty]
863 repConstr :: Core String -> Core [M.Type] -> DsM (Core M.Cons)
864 repConstr (MkC con) (MkC tys) = rep2 constrName [con,tys]
866 ------------ Types -------------------
868 repTvar :: Core String -> DsM (Core M.Type)
869 repTvar (MkC s) = rep2 tvarName [s]
871 repTapp :: Core M.Type -> Core M.Type -> DsM (Core M.Type)
872 repTapp (MkC t1) (MkC t2) = rep2 tappName [t1,t2]
874 repTapps :: Core M.Type -> [Core M.Type] -> DsM (Core M.Type)
875 repTapps f [] = return f
876 repTapps f (t:ts) = do { f1 <- repTapp f t; repTapps f1 ts }
878 --------- Type constructors --------------
880 repNamedTyCon :: Core String -> DsM (Core M.Type)
881 repNamedTyCon (MkC s) = rep2 namedTyConName [s]
883 repTupleTyCon :: Int -> DsM (Core M.Type)
884 -- Note: not Core Int; it's easier to be direct here
885 repTupleTyCon i = rep2 tupleTyConName [mkIntExpr (fromIntegral i)]
887 repArrowTyCon :: DsM (Core M.Type)
888 repArrowTyCon = rep2 arrowTyConName []
890 repListTyCon :: DsM (Core M.Type)
891 repListTyCon = rep2 listTyConName []
894 ----------------------------------------------------------
897 repLiteral :: HsLit -> DsM (Core M.Lit)
899 = do { lit_expr <- dsLit lit; rep2 lit_name [lit_expr] }
901 lit_name = case lit of
903 HsChar _ -> charLName
904 HsString _ -> stringLName
905 HsRat _ _ -> rationalLName
907 uh_oh = pprPanic "DsMeta.repLiteral: trying to represent exotic literal"
910 repOverloadedLiteral :: HsOverLit -> DsM (Core M.Lit)
911 repOverloadedLiteral (HsIntegral i _) = repLiteral (HsInt i)
912 repOverloadedLiteral (HsFractional f _) = do { rat_ty <- lookupType rationalTyConName ;
913 repLiteral (HsRat f rat_ty) }
914 -- The type Rational will be in the environment, becuase
915 -- the smart constructor 'THSyntax.rationalL' uses it in its type,
916 -- and rationalL is sucked in when any TH stuff is used
918 --------------- Miscellaneous -------------------
920 repLift :: Core e -> DsM (Core M.Expr)
921 repLift (MkC x) = rep2 liftName [x]
923 repGensym :: Core String -> DsM (Core (M.Q String))
924 repGensym (MkC lit_str) = rep2 gensymName [lit_str]
926 repBindQ :: Type -> Type -- a and b
927 -> Core (M.Q a) -> Core (a -> M.Q b) -> DsM (Core (M.Q b))
928 repBindQ ty_a ty_b (MkC x) (MkC y)
929 = rep2 bindQName [Type ty_a, Type ty_b, x, y]
931 ------------ Lists and Tuples -------------------
932 -- turn a list of patterns into a single pattern matching a list
934 coreList :: Name -- Of the TyCon of the element type
935 -> [Core a] -> DsM (Core [a])
937 = do { elt_ty <- lookupType tc_name; return (coreList' elt_ty es) }
939 coreList' :: Type -- The element type
940 -> [Core a] -> Core [a]
941 coreList' elt_ty es = MkC (mkListExpr elt_ty (map unC es ))
943 nonEmptyCoreList :: [Core a] -> Core [a]
944 -- The list must be non-empty so we can get the element type
945 -- Otherwise use coreList
946 nonEmptyCoreList [] = panic "coreList: empty argument"
947 nonEmptyCoreList xs@(MkC x:_) = MkC (mkListExpr (exprType x) (map unC xs))
949 corePair :: (Core a, Core b) -> Core (a,b)
950 corePair (MkC x, MkC y) = MkC (mkCoreTup [x,y])
952 lookupOcc :: Name -> DsM (Core String)
953 -- Lookup an occurrence; it can't be a splice.
954 -- Use the in-scope bindings if they exist
956 = do { mb_val <- dsLookupMetaEnv n ;
958 Nothing -> globalVar n
959 Just (Bound x) -> return (coreVar x)
960 other -> pprPanic "repE:lookupOcc" (ppr n)
963 globalVar :: Name -> DsM (Core String)
964 globalVar n = coreStringLit (name_mod ++ ":" ++ name_occ)
966 name_mod = moduleUserString (nameModule n)
967 name_occ = occNameUserString (nameOccName n)
969 localVar :: Name -> DsM (Core String)
970 localVar n = coreStringLit (occNameUserString (nameOccName n))
972 coreStringLit :: String -> DsM (Core String)
973 coreStringLit s = do { z <- mkStringLit s; return(MkC z) }
975 coreVar :: Id -> Core String -- The Id has type String
976 coreVar id = MkC (Var id)
980 -- %************************************************************************
982 -- The known-key names for Template Haskell
984 -- %************************************************************************
986 -- To add a name, do three things
990 -- 3) Add the name to knownKeyNames
992 templateHaskellNames :: NameSet
993 -- The names that are implicitly mentioned by ``bracket''
994 -- Should stay in sync with the import list of DsMeta
996 = mkNameSet [ intLName,charLName, stringLName, rationalLName,
997 plitName, pvarName, ptupName,
998 pconName, ptildeName, paspatName, pwildName,
999 varName, conName, litName, appName, infixEName, lamName,
1000 tupName, doEName, compName,
1001 listExpName, sigExpName, condName, letEName, caseEName,
1002 infixAppName, negName, sectionLName, sectionRName,
1003 guardedName, normalName,
1004 bindStName, letStName, noBindStName, parStName,
1005 fromName, fromThenName, fromToName, fromThenToName,
1006 funName, valName, liftName,
1007 gensymName, returnQName, bindQName,
1008 matchName, clauseName, funName, valName, dataDName, classDName,
1009 instName, protoName, tvarName, tconName, tappName,
1010 arrowTyConName, tupleTyConName, listTyConName, namedTyConName,
1012 exprTyConName, declTyConName, pattTyConName, mtchTyConName,
1013 clseTyConName, stmtTyConName, consTyConName, typeTyConName,
1014 qTyConName, expTyConName, matTyConName, clsTyConName,
1015 decTyConName, typTyConName ]
1018 varQual = mk_known_key_name OccName.varName
1019 tcQual = mk_known_key_name OccName.tcName
1022 -- NB: the THSyntax module comes from the "haskell-src" package
1023 thModule = mkThPkgModule mETA_META_Name
1025 mk_known_key_name space str uniq
1026 = mkKnownKeyExternalName thModule (mkOccFS space str) uniq
1028 intLName = varQual FSLIT("intL") intLIdKey
1029 charLName = varQual FSLIT("charL") charLIdKey
1030 stringLName = varQual FSLIT("stringL") stringLIdKey
1031 rationalLName = varQual FSLIT("rationalL") rationalLIdKey
1032 plitName = varQual FSLIT("plit") plitIdKey
1033 pvarName = varQual FSLIT("pvar") pvarIdKey
1034 ptupName = varQual FSLIT("ptup") ptupIdKey
1035 pconName = varQual FSLIT("pcon") pconIdKey
1036 ptildeName = varQual FSLIT("ptilde") ptildeIdKey
1037 paspatName = varQual FSLIT("paspat") paspatIdKey
1038 pwildName = varQual FSLIT("pwild") pwildIdKey
1039 varName = varQual FSLIT("var") varIdKey
1040 conName = varQual FSLIT("con") conIdKey
1041 litName = varQual FSLIT("lit") litIdKey
1042 appName = varQual FSLIT("app") appIdKey
1043 infixEName = varQual FSLIT("infixE") infixEIdKey
1044 lamName = varQual FSLIT("lam") lamIdKey
1045 tupName = varQual FSLIT("tup") tupIdKey
1046 doEName = varQual FSLIT("doE") doEIdKey
1047 compName = varQual FSLIT("comp") compIdKey
1048 listExpName = varQual FSLIT("listExp") listExpIdKey
1049 sigExpName = varQual FSLIT("sigExp") sigExpIdKey
1050 condName = varQual FSLIT("cond") condIdKey
1051 letEName = varQual FSLIT("letE") letEIdKey
1052 caseEName = varQual FSLIT("caseE") caseEIdKey
1053 infixAppName = varQual FSLIT("infixApp") infixAppIdKey
1054 negName = varQual FSLIT("neg") negIdKey
1055 sectionLName = varQual FSLIT("sectionL") sectionLIdKey
1056 sectionRName = varQual FSLIT("sectionR") sectionRIdKey
1057 guardedName = varQual FSLIT("guarded") guardedIdKey
1058 normalName = varQual FSLIT("normal") normalIdKey
1059 bindStName = varQual FSLIT("bindSt") bindStIdKey
1060 letStName = varQual FSLIT("letSt") letStIdKey
1061 noBindStName = varQual FSLIT("noBindSt") noBindStIdKey
1062 parStName = varQual FSLIT("parSt") parStIdKey
1063 fromName = varQual FSLIT("from") fromIdKey
1064 fromThenName = varQual FSLIT("fromThen") fromThenIdKey
1065 fromToName = varQual FSLIT("fromTo") fromToIdKey
1066 fromThenToName = varQual FSLIT("fromThenTo") fromThenToIdKey
1067 liftName = varQual FSLIT("lift") liftIdKey
1068 gensymName = varQual FSLIT("gensym") gensymIdKey
1069 returnQName = varQual FSLIT("returnQ") returnQIdKey
1070 bindQName = varQual FSLIT("bindQ") bindQIdKey
1073 matchName = varQual FSLIT("match") matchIdKey
1076 clauseName = varQual FSLIT("clause") clauseIdKey
1079 funName = varQual FSLIT("fun") funIdKey
1080 valName = varQual FSLIT("val") valIdKey
1081 dataDName = varQual FSLIT("dataD") dataDIdKey
1082 classDName = varQual FSLIT("classD") classDIdKey
1083 instName = varQual FSLIT("inst") instIdKey
1084 protoName = varQual FSLIT("proto") protoIdKey
1087 tvarName = varQual FSLIT("tvar") tvarIdKey
1088 tconName = varQual FSLIT("tcon") tconIdKey
1089 tappName = varQual FSLIT("tapp") tappIdKey
1092 arrowTyConName = varQual FSLIT("arrowTyCon") arrowIdKey
1093 tupleTyConName = varQual FSLIT("tupleTyCon") tupleIdKey
1094 listTyConName = varQual FSLIT("listTyCon") listIdKey
1095 namedTyConName = varQual FSLIT("namedTyCon") namedTyConIdKey
1098 constrName = varQual FSLIT("constr") constrIdKey
1100 exprTyConName = tcQual FSLIT("Expr") exprTyConKey
1101 declTyConName = tcQual FSLIT("Decl") declTyConKey
1102 pattTyConName = tcQual FSLIT("Patt") pattTyConKey
1103 mtchTyConName = tcQual FSLIT("Mtch") mtchTyConKey
1104 clseTyConName = tcQual FSLIT("Clse") clseTyConKey
1105 stmtTyConName = tcQual FSLIT("Stmt") stmtTyConKey
1106 consTyConName = tcQual FSLIT("Cons") consTyConKey
1107 typeTyConName = tcQual FSLIT("Type") typeTyConKey
1109 qTyConName = tcQual FSLIT("Q") qTyConKey
1110 expTyConName = tcQual FSLIT("Exp") expTyConKey
1111 decTyConName = tcQual FSLIT("Dec") decTyConKey
1112 typTyConName = tcQual FSLIT("Typ") typTyConKey
1113 matTyConName = tcQual FSLIT("Mat") matTyConKey
1114 clsTyConName = tcQual FSLIT("Cls") clsTyConKey
1116 -- TyConUniques available: 100-119
1117 -- Check in PrelNames if you want to change this
1119 expTyConKey = mkPreludeTyConUnique 100
1120 matTyConKey = mkPreludeTyConUnique 101
1121 clsTyConKey = mkPreludeTyConUnique 102
1122 qTyConKey = mkPreludeTyConUnique 103
1123 exprTyConKey = mkPreludeTyConUnique 104
1124 declTyConKey = mkPreludeTyConUnique 105
1125 pattTyConKey = mkPreludeTyConUnique 106
1126 mtchTyConKey = mkPreludeTyConUnique 107
1127 clseTyConKey = mkPreludeTyConUnique 108
1128 stmtTyConKey = mkPreludeTyConUnique 109
1129 consTyConKey = mkPreludeTyConUnique 110
1130 typeTyConKey = mkPreludeTyConUnique 111
1131 typTyConKey = mkPreludeTyConUnique 112
1132 decTyConKey = mkPreludeTyConUnique 113
1136 -- IdUniques available: 200-299
1137 -- If you want to change this, make sure you check in PrelNames
1138 fromIdKey = mkPreludeMiscIdUnique 200
1139 fromThenIdKey = mkPreludeMiscIdUnique 201
1140 fromToIdKey = mkPreludeMiscIdUnique 202
1141 fromThenToIdKey = mkPreludeMiscIdUnique 203
1142 liftIdKey = mkPreludeMiscIdUnique 204
1143 gensymIdKey = mkPreludeMiscIdUnique 205
1144 returnQIdKey = mkPreludeMiscIdUnique 206
1145 bindQIdKey = mkPreludeMiscIdUnique 207
1146 funIdKey = mkPreludeMiscIdUnique 208
1147 valIdKey = mkPreludeMiscIdUnique 209
1148 protoIdKey = mkPreludeMiscIdUnique 210
1149 matchIdKey = mkPreludeMiscIdUnique 211
1150 clauseIdKey = mkPreludeMiscIdUnique 212
1151 intLIdKey = mkPreludeMiscIdUnique 213
1152 charLIdKey = mkPreludeMiscIdUnique 214
1154 classDIdKey = mkPreludeMiscIdUnique 215
1155 instIdKey = mkPreludeMiscIdUnique 216
1156 dataDIdKey = mkPreludeMiscIdUnique 217
1159 plitIdKey = mkPreludeMiscIdUnique 220
1160 pvarIdKey = mkPreludeMiscIdUnique 221
1161 ptupIdKey = mkPreludeMiscIdUnique 222
1162 pconIdKey = mkPreludeMiscIdUnique 223
1163 ptildeIdKey = mkPreludeMiscIdUnique 224
1164 paspatIdKey = mkPreludeMiscIdUnique 225
1165 pwildIdKey = mkPreludeMiscIdUnique 226
1166 varIdKey = mkPreludeMiscIdUnique 227
1167 conIdKey = mkPreludeMiscIdUnique 228
1168 litIdKey = mkPreludeMiscIdUnique 229
1169 appIdKey = mkPreludeMiscIdUnique 230
1170 infixEIdKey = mkPreludeMiscIdUnique 231
1171 lamIdKey = mkPreludeMiscIdUnique 232
1172 tupIdKey = mkPreludeMiscIdUnique 233
1173 doEIdKey = mkPreludeMiscIdUnique 234
1174 compIdKey = mkPreludeMiscIdUnique 235
1175 listExpIdKey = mkPreludeMiscIdUnique 237
1176 condIdKey = mkPreludeMiscIdUnique 238
1177 letEIdKey = mkPreludeMiscIdUnique 239
1178 caseEIdKey = mkPreludeMiscIdUnique 240
1179 infixAppIdKey = mkPreludeMiscIdUnique 241
1180 negIdKey = mkPreludeMiscIdUnique 242
1181 sectionLIdKey = mkPreludeMiscIdUnique 243
1182 sectionRIdKey = mkPreludeMiscIdUnique 244
1183 guardedIdKey = mkPreludeMiscIdUnique 245
1184 normalIdKey = mkPreludeMiscIdUnique 246
1185 bindStIdKey = mkPreludeMiscIdUnique 247
1186 letStIdKey = mkPreludeMiscIdUnique 248
1187 noBindStIdKey = mkPreludeMiscIdUnique 249
1188 parStIdKey = mkPreludeMiscIdUnique 250
1190 tvarIdKey = mkPreludeMiscIdUnique 251
1191 tconIdKey = mkPreludeMiscIdUnique 252
1192 tappIdKey = mkPreludeMiscIdUnique 253
1194 arrowIdKey = mkPreludeMiscIdUnique 254
1195 tupleIdKey = mkPreludeMiscIdUnique 255
1196 listIdKey = mkPreludeMiscIdUnique 256
1197 namedTyConIdKey = mkPreludeMiscIdUnique 257
1199 constrIdKey = mkPreludeMiscIdUnique 258
1201 stringLIdKey = mkPreludeMiscIdUnique 259
1202 rationalLIdKey = mkPreludeMiscIdUnique 260
1204 sigExpIdKey = mkPreludeMiscIdUnique 261
1208 -- %************************************************************************
1212 -- %************************************************************************
1214 -- It is rather usatisfactory that we don't have a SrcLoc
1215 addDsWarn :: SDoc -> DsM ()
1216 addDsWarn msg = dsWarn (noSrcLoc, msg)