import RnEnv
import RnNames ( importsFromLocalDecls )
import RnTypes ( rnHsTypeFVs, rnPat, litFVs, rnOverLit, rnPatsAndThen,
- dupFieldErr, precParseErr, sectionPrecErr, patSigErr )
+ dupFieldErr, precParseErr, sectionPrecErr, patSigErr, checkTupSize )
import CmdLineOpts ( DynFlag(..), opt_IgnoreAsserts )
import BasicTypes ( Fixity(..), FixityDirection(..), IPName(..),
defaultFixity, negateFixity, compareFixity )
crossPName, zipPName, toPName,
enumFromToPName, enumFromThenToPName, assertErrorName,
negateName, monadNames, mfixName )
-#ifdef GHCI
-import DsMeta ( qTyConName )
-#endif
import Name ( Name, nameOccName )
import NameSet
import UnicodeUtil ( stringToUtf8 )
returnM (HsPar e', fvs_e)
-- Template Haskell extensions
-#ifdef GHCI
-rnExpr (HsBracket br_body loc)
- = addSrcLoc loc $
- checkGHCI (thErr "bracket") `thenM_`
- rnBracket br_body `thenM` \ (body', fvs_e) ->
- returnM (HsBracket body' loc, fvs_e `addOneFV` qTyConName)
- -- We use the Q tycon as a proxy to haul in all the smart
- -- constructors; see the hack in RnIfaces
-#endif
-
-rnExpr (HsSplice n e loc)
- = addSrcLoc loc $
- checkGHCI (thErr "splice") `thenM_`
- newLocalsRn [(n,loc)] `thenM` \ [n'] ->
- rnExpr e `thenM` \ (e', fvs_e) ->
- returnM (HsSplice n' e' loc, fvs_e)
+-- Don't ifdef-GHCI them because we want to fail gracefully
+-- (not with an rnExpr crash) in a stage-1 compiler.
+rnExpr e@(HsBracket br_body loc)
+ = addSrcLoc loc $
+ checkTH e "bracket" `thenM_`
+ rnBracket br_body `thenM` \ (body', fvs_e) ->
+ returnM (HsBracket body' loc, fvs_e `plusFV` thProxyName)
+
+rnExpr e@(HsSplice n splice loc)
+ = addSrcLoc loc $
+ checkTH e "splice" `thenM_`
+ newLocalsRn [(n,loc)] `thenM` \ [n'] ->
+ rnExpr splice `thenM` \ (splice', fvs_e) ->
+ returnM (HsSplice n' splice' loc, fvs_e `plusFV` thProxyName)
+
+rnExpr e@(HsReify (Reify flavour name))
+ = checkTH e "reify" `thenM_`
+ lookupGlobalOccRn name `thenM` \ name' ->
+ -- For now, we can only reify top-level things
+ returnM (HsReify (Reify flavour name'), unitFV name' `plusFV` thProxyName)
rnExpr section@(SectionL expr op)
= rnExpr expr `thenM` \ (expr', fvs_expr) ->
rnExpr expr `thenM` \ (expr',fvExpr) ->
returnM (HsLet binds' expr', fvExpr)
-rnExpr (HsWith expr binds is_with)
- = warnIf is_with withWarning `thenM_`
- rnExpr expr `thenM` \ (expr',fvExpr) ->
- rnIPBinds binds `thenM` \ (binds',fvBinds) ->
- returnM (HsWith expr' binds' is_with, fvExpr `plusFV` fvBinds)
-
rnExpr e@(HsDo do_or_lc stmts _ _ src_loc)
= addSrcLoc src_loc $
rnStmts do_or_lc stmts `thenM` \ (stmts', fvs) ->
returnM (ExplicitPArr placeHolderType exps',
fvs `addOneFV` toPName `addOneFV` parrTyCon_name)
-rnExpr (ExplicitTuple exps boxity)
- = rnExprs exps `thenM` \ (exps', fvs) ->
+rnExpr e@(ExplicitTuple exps boxity)
+ = checkTupSize tup_size `thenM_`
+ rnExprs exps `thenM` \ (exps', fvs) ->
returnM (ExplicitTuple exps' boxity, fvs `addOneFV` tycon_name)
where
- tycon_name = tupleTyCon_name boxity (length exps)
+ tup_size = length exps
+ tycon_name = tupleTyCon_name boxity tup_size
rnExpr (RecordCon con_id rbinds)
= lookupOccRn con_id `thenM` \ conname ->
%************************************************************************
%* *
-\subsubsection{@rnIPBinds@s: in implicit parameter bindings} *
-%* *
-%************************************************************************
-
-\begin{code}
-rnIPBinds [] = returnM ([], emptyFVs)
-rnIPBinds ((n, expr) : binds)
- = newIPName n `thenM` \ name ->
- rnExpr expr `thenM` \ (expr',fvExpr) ->
- rnIPBinds binds `thenM` \ (binds',fvBinds) ->
- returnM ((name, expr') : binds', fvExpr `plusFV` fvBinds)
-
-\end{code}
-
-%************************************************************************
-%* *
Template Haskell brackets
%* *
%************************************************************************
-- the rnPatsAndThen, but it does not matter
rnNormalStmts ctxt (LetStmt binds : stmts)
- = rnBindsAndThen binds $ \ binds' ->
- rnNormalStmts ctxt stmts `thenM` \ (stmts', fvs) ->
- returnM (LetStmt binds' : stmts', fvs)
+ = checkErr (ok ctxt binds) (badIpBinds binds) `thenM_`
+ rnBindsAndThen binds ( \ binds' ->
+ rnNormalStmts ctxt stmts `thenM` \ (stmts', fvs) ->
+ returnM (LetStmt binds' : stmts', fvs))
+ where
+ -- We do not allow implicit-parameter bindings in a parallel
+ -- list comprehension. I'm not sure what it might mean.
+ ok (ParStmtCtxt _) (IPBinds _ _) = False
+ ok _ _ = True
rnNormalStmts ctxt (ParStmt stmtss : stmts)
- = mapFvRn (rnNormalStmts ctxt) stmtss `thenM` \ (stmtss', fv_stmtss) ->
+ = mapFvRn (rnNormalStmts (ParStmtCtxt ctxt)) stmtss `thenM` \ (stmtss', fv_stmtss) ->
let
bndrss = map collectStmtsBinders stmtss'
in
MDoExpr -> "mdo"
other -> "do"
-thErr what
- = ptext SLIT("Template Haskell") <+> text what <+>
- ptext SLIT("illegal in a stage-1 compiler")
-
-
-withWarning
- = sep [quotes (ptext SLIT("with")),
- ptext SLIT("is deprecated, use"),
- quotes (ptext SLIT("let")),
- ptext SLIT("instead")]
+#ifdef GHCI
+checkTH e what = returnM () -- OK
+#else
+checkTH e what -- Raise an error in a stage-1 compiler
+ = addErr (vcat [ptext SLIT("Template Haskell") <+> text what <+>
+ ptext SLIT("illegal in a stage-1 compiler"),
+ nest 2 (ppr e)])
+#endif
+
+badIpBinds binds
+ = hang (ptext SLIT("Implicit-parameter bindings illegal in a parallel list comprehension:")) 4
+ (ppr binds)
\end{code}
projects / ghc-hetmet.git / blobdiff