module DsExpr ( dsExpr, dsLExpr, dsLocalBinds, dsValBinds, dsLit ) where
#include "HsVersions.h"
-#if defined(GHCI) && defined(BREAKPOINT)
-import Foreign.StablePtr
-import GHC.Exts
-import IOEnv
-import PrelNames
-import TysWiredIn
-import TypeRep
-import TyCon
-#endif
+
import Match
import MatchLit
import DsMonad
#ifdef GHCI
+import PrelNames
-- Template Haskell stuff iff bootstrapped
import DsMeta
#endif
| x == var = Case scrut bndr ty alts
scrungle (Let binds body) = Let binds (scrungle body)
scrungle other = panic ("scrungleMatch: tuple pattern:\n" ++ showSDoc (ppr other))
+
\end{code}
%************************************************************************
\begin{code}
dsLExpr :: LHsExpr Id -> DsM CoreExpr
+
dsLExpr (L loc e) = putSrcSpanDs loc $ dsExpr e
dsExpr :: HsExpr Id -> DsM CoreExpr
-
dsExpr (HsPar e) = dsLExpr e
dsExpr (ExprWithTySigOut e _) = dsLExpr e
dsExpr (HsVar var) = returnDs (Var var)
dsExpr (HsIPVar ip) = returnDs (Var (ipNameName ip))
dsExpr (HsLit lit) = dsLit lit
dsExpr (HsOverLit lit) = dsOverLit lit
-dsExpr (HsWrap co_fn e) = dsCoercion co_fn (dsExpr e)
+dsExpr (HsWrap co_fn e) = dsCoercion co_fn (dsExpr e)
dsExpr (NegApp expr neg_expr)
= do { core_expr <- dsLExpr expr
= matchWrapper LambdaExpr a_Match `thenDs` \ (binders, matching_code) ->
returnDs (mkLams binders matching_code)
-#if defined(GHCI) && defined(BREAKPOINT)
-dsExpr (HsApp (L _ (HsApp realFun@(L _ (HsWrap _ fun)) (L loc arg))) _)
- | HsVar funId <- fun
- , idName funId `elem` [breakpointJumpName, breakpointCondJumpName]
- , ids <- filter (isValidType . idType) (extractIds arg)
- = do warnDs (text "Extracted ids:" <+> ppr ids <+> ppr (map idType ids))
- stablePtr <- ioToIOEnv $ newStablePtr ids
- -- Yes, I know... I'm gonna burn in hell.
- let Ptr addr# = castStablePtrToPtr stablePtr
- funCore <- dsLExpr realFun
- argCore <- dsLExpr (L loc (HsLit (HsInt (fromIntegral (I# (addr2Int# addr#))))))
- hvalCore <- dsLExpr (L loc (extractHVals ids))
- return ((funCore `App` argCore) `App` hvalCore)
- where extractIds :: HsExpr Id -> [Id]
- extractIds (HsApp fn arg)
- | HsVar argId <- unLoc arg
- = argId:extractIds (unLoc fn)
- | HsWrap co_fn arg' <- unLoc arg
- , HsVar argId <- arg' -- SLPJ: not sure what is going on here
- = error (showSDoc (ppr co_fn)) -- argId:extractIds (unLoc fn)
- extractIds x = []
- extractHVals ids = ExplicitList unitTy (map (L loc . HsVar) ids)
- -- checks for tyvars and unlifted kinds.
- isValidType (TyVarTy _) = False
- isValidType (FunTy a b) = isValidType a && isValidType b
- isValidType (NoteTy _ t) = isValidType t
- isValidType (AppTy a b) = isValidType a && isValidType b
- isValidType (TyConApp con ts) = not (isUnLiftedTyCon con) && all isValidType ts
- isValidType _ = True
-#endif
-
dsExpr expr@(HsApp fun arg)
= dsLExpr fun `thenDs` \ core_fun ->
dsLExpr arg `thenDs` \ core_arg ->
- returnDs (core_fun `App` core_arg)
+ returnDs (core_fun `mkDsApp` core_arg)
\end{code}
Operator sections. At first it looks as if we can convert
-- for the type of y, we need the type of op's 2nd argument
dsLExpr e1 `thenDs` \ x_core ->
dsLExpr e2 `thenDs` \ y_core ->
- returnDs (mkApps core_op [x_core, y_core])
+ returnDs (mkDsApps core_op [x_core, y_core])
dsExpr (SectionL expr op) -- Desugar (e !) to ((!) e)
= dsLExpr op `thenDs` \ core_op ->
dsLExpr expr `thenDs` \ x_core ->
- returnDs (App core_op x_core)
+ returnDs (mkDsApp core_op x_core)
-- dsLExpr (SectionR op expr) -- \ x -> op x expr
dsExpr (SectionR op expr)
newSysLocalDs y_ty `thenDs` \ y_id ->
returnDs (bindNonRec y_id y_core $
- Lam x_id (mkApps core_op [Var x_id, Var y_id]))
+ Lam x_id (mkDsApps core_op [Var x_id, Var y_id]))
dsExpr (HsSCC cc expr)
= dsLExpr expr `thenDs` \ core_expr ->
matchWrapper CaseAlt matches `thenDs` \ ([discrim_var], matching_code) ->
returnDs (scrungleMatch discrim_var core_discrim matching_code)
+-- Pepe: The binds are in scope in the body but NOT in the binding group
+-- This is to avoid silliness in breakpoints
dsExpr (HsLet binds body)
- = dsLExpr body `thenDs` \ body' ->
+ = dsLExpr body `thenDs` \ body' ->
dsLocalBinds binds body'
-- We need the `ListComp' form to use `deListComp' (rather than the "do" form)
constructor @C@, setting all of @C@'s fields to bottom.
\begin{code}
-dsExpr (RecordCon (L _ data_con_id) con_expr rbinds)
+dsExpr (RecordCon (L _ data_con_id) con_expr (HsRecordBinds rbinds))
= dsExpr con_expr `thenDs` \ con_expr' ->
let
(arg_tys, _) = tcSplitFunTys (exprType con_expr')
dictionaries.
\begin{code}
-dsExpr (RecordUpd record_expr [] record_in_ty record_out_ty)
+dsExpr (RecordUpd record_expr (HsRecordBinds []) record_in_ty record_out_ty)
= dsLExpr record_expr
-dsExpr expr@(RecordUpd record_expr rbinds record_in_ty record_out_ty)
+dsExpr expr@(RecordUpd record_expr (HsRecordBinds rbinds) record_in_ty record_out_ty)
= dsLExpr record_expr `thenDs` \ record_expr' ->
-- Desugar the rbinds, and generate let-bindings if
Hpc Support
\begin{code}
-dsExpr (HsTick ix e) = do
+dsExpr (HsTick ix vars e) = do
e' <- dsLExpr e
- mkTickBox ix e'
+ mkTickBox ix vars e'
-- There is a problem here. The then and else branches
-- have no free variables, so they are open to lifting.
go (LetStmt binds : stmts)
= do { rest <- go stmts
; dsLocalBinds binds rest }
-
+
go (BindStmt pat rhs bind_op fail_op : stmts)
- = do { body <- go stmts
+ =
+ do { body <- go stmts
; var <- selectSimpleMatchVarL pat
; match <- matchSinglePat (Var var) (StmtCtxt DoExpr) pat
result_ty (cantFailMatchResult body)
; match_code <- handle_failure pat match fail_op
- ; rhs' <- dsLExpr rhs
+ ; rhs' <- dsLExpr rhs
; bind_op' <- dsExpr bind_op
; returnDs (mkApps bind_op' [rhs', Lam var match_code]) }
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