module HsDecls (
HsDecl(..), TyClDecl(..), InstDecl(..), RuleDecl(..), RuleBndr(..),
DefaultDecl(..),
- ForeignDecl(..), FoImport(..), FoExport(..), FoType(..),
+ ForeignDecl(..), ForeignImport(..), ForeignExport(..),
+ CImportSpec(..), FoType(..),
ConDecl(..), ConDetails(..),
BangType(..), getBangType, getBangStrictness, unbangedType,
DeprecDecl(..), DeprecTxt,
)
import CoreSyn ( CoreRule(..), RuleName )
import BasicTypes ( NewOrData(..), StrictnessMark(..), Activation(..) )
-import ForeignCall ( CExportSpec, CCallSpec, DNCallSpec, CCallConv )
+import ForeignCall ( CCallTarget(..), DNCallSpec, CCallConv, Safety,
+ CExportSpec(..))
-- others:
import Name ( NamedThing )
hsDeclName :: (NamedThing name, Outputable name, Outputable pat)
=> HsDecl name pat -> name
#endif
-hsDeclName (TyClD decl) = tyClDeclName decl
-hsDeclName (InstD decl) = instDeclName decl
-hsDeclName (ForD decl) = forDeclName decl
-hsDeclName (FixD (FixitySig name _ _)) = name
+hsDeclName (TyClD decl) = tyClDeclName decl
+hsDeclName (InstD decl) = instDeclName decl
+hsDeclName (ForD decl) = foreignDeclName decl
+hsDeclName (FixD (FixitySig name _ _)) = name
-- Others don't make sense
#ifdef DEBUG
-hsDeclName x = pprPanic "HsDecls.hsDeclName" (ppr x)
+hsDeclName x = pprPanic "HsDecls.hsDeclName" (ppr x)
#endif
%************************************************************************
\begin{code}
+
+-- foreign declarations are distinguished as to whether they define or use a
+-- Haskell name
+--
+-- * the Boolean value indicates whether the pre-standard deprecated syntax
+-- has been used
+--
data ForeignDecl name
- = ForeignImport name (HsType name) FoImport SrcLoc
- | ForeignExport name (HsType name) FoExport SrcLoc
+ = ForeignImport name (HsType name) ForeignImport Bool SrcLoc -- defines name
+ | ForeignExport name (HsType name) ForeignExport Bool SrcLoc -- uses name
-forDeclName (ForeignImport n _ _ _) = n
-forDeclName (ForeignExport n _ _ _) = n
+-- yield the Haskell name defined or used in a foreign declaration
+--
+foreignDeclName :: ForeignDecl name -> name
+foreignDeclName (ForeignImport n _ _ _ _) = n
+foreignDeclName (ForeignExport n _ _ _ _) = n
-data FoImport
- = LblImport CLabelString -- foreign label
- | CImport CCallSpec -- foreign import
- | CDynImport CCallConv -- foreign export dynamic
- | DNImport DNCallSpec -- foreign import dotnet
+-- specification of an imported external entity in dependence on the calling
+-- convention
+--
+data ForeignImport = -- import of a C entity
+ --
+ -- * the two strings specifying a header file or library
+ -- may be empty, which indicates the absence of a
+ -- header or object specification (both are not used
+ -- in the case of `CWrapper' and when `CFunction'
+ -- has a dynamic target)
+ --
+ -- * the calling convention is irrelevant for code
+ -- generation in the case of `CLabel', but is needed
+ -- for pretty printing
+ --
+ -- * `Safety' is irrelevant for `CLabel' and `CWrapper'
+ --
+ CImport CCallConv -- ccall or stdcall
+ Safety -- safe or unsafe
+ FastString -- name of C header
+ FastString -- name of library object
+ CImportSpec -- details of the C entity
+
+ -- import of a .NET function
+ --
+ | DNImport DNCallSpec
+
+-- details of an external C entity
+--
+data CImportSpec = CLabel CLabelString -- import address of a C label
+ | CFunction CCallTarget -- static or dynamic function
+ | CWrapper -- wrapper to expose closures
+ -- (former f.e.d.)
-data FoExport = CExport CExportSpec
+-- specification of an externally exported entity in dependence on the calling
+-- convention
+--
+data ForeignExport = CExport CExportSpec -- contains the calling convention
+ | DNExport -- presently unused
+-- abstract type imported from .NET
+--
data FoType = DNType -- In due course we'll add subtype stuff
- deriving( Eq ) -- Used for equality instance for TyClDecl
+ deriving (Eq) -- Used for equality instance for TyClDecl
+
+
+-- pretty printing of foreign declarations
+--
instance Outputable name => Outputable (ForeignDecl name) where
- ppr (ForeignImport nm ty (LblImport lbl) src_loc)
- = ptext SLIT("foreign label") <+> ppr lbl <+> ppr nm <+> dcolon <+> ppr ty
- ppr (ForeignImport nm ty decl src_loc)
- = ptext SLIT("foreign import") <+> ppr decl <+> ppr nm <+> dcolon <+> ppr ty
- ppr (ForeignExport nm ty decl src_loc)
- = ptext SLIT("foreign export") <+> ppr decl <+> ppr nm <+> dcolon <+> ppr ty
-
-instance Outputable FoImport where
- ppr (CImport d) = ppr d
- ppr (CDynImport conv) = text "dynamic" <+> ppr conv
- ppr (DNImport d) = ptext SLIT("dotnet") <+> ppr d
- ppr (LblImport l) = ptext SLIT("label") <+> ppr l
-
-instance Outputable FoExport where
- ppr (CExport d) = ppr d
+ ppr (ForeignImport n ty fimport _ _) =
+ ptext SLIT("foreign import") <+> ppr fimport <+>
+ ppr n <+> dcolon <+> ppr ty
+ ppr (ForeignExport n ty fexport _ _) =
+ ptext SLIT("foreign export") <+> ppr fexport <+>
+ ppr n <+> dcolon <+> ppr ty
+
+instance Outputable ForeignImport where
+ ppr (DNImport spec) =
+ ptext SLIT("dotnet") <+> ppr spec
+ ppr (CImport cconv safety header lib spec) =
+ ppr cconv <+> ppr safety <+>
+ char '"' <> pprCEntity header lib spec <> char '"'
+ where
+ pprCEntity header lib (CLabel lbl) =
+ ptext SLIT("static") <+> ptext header <+> char '&' <>
+ pprLib lib <> ppr lbl
+ pprCEntity header lib (CFunction (StaticTarget lbl)) =
+ ptext SLIT("static") <+> ptext header <+> char '&' <>
+ pprLib lib <> ppr lbl
+ pprCEntity header lib (CFunction (DynamicTarget)) =
+ ptext SLIT("dynamic")
+ pprCEntity header lib (CFunction (CasmTarget _)) =
+ panic "HsDecls.pprCEntity: malformed C function target"
+ pprCEntity _ _ (CWrapper) = ptext SLIT("wrapper")
+ --
+ pprLib lib | nullFastString lib = empty
+ | otherwise = char '[' <> ppr lib <> char ']'
+
+instance Outputable ForeignExport where
+ ppr (CExport (CExportStatic lbl cconv)) =
+ ppr cconv <+> char '"' <> ppr lbl <> char '"'
+ ppr (DNExport ) =
+ ptext SLIT("dotnet") <+> ptext SLIT("\"<unused>\"")
instance Outputable FoType where
- ppr DNType = ptext SLIT("type dotnet")
+ ppr DNType = ptext SLIT("type dotnet")
\end{code}
projects / ghc-hetmet.git / blobdiff