module HsLit,
module HsPat,
module HsTypes,
+ module HsUtils,
Fixity, NewOrData,
HsModule(..), HsExtCore(..),
- collectStmtsBinders, collectStmtBinders,
- collectHsBinders, collectLocatedHsBinders,
- collectMonoBinders, collectLocatedMonoBinders,
- collectSigTysFromHsBinds, collectSigTysFromMonoBinds
+ collectStmtsBinders, collectStmtBinders, collectLStmtBinders,
+ collectGroupBinders, collectHsBindLocatedBinders,
+ collectHsBindBinders,
+ collectSigTysFromHsBind, collectSigTysFromHsBinds
) where
#include "HsVersions.h"
import HsTypes
import HscTypes ( DeprecTxt )
import BasicTypes ( Fixity, NewOrData )
+import HsUtils
-- others:
import IfaceSyn ( IfaceBinding )
import Outputable
-import SrcLoc ( SrcLoc )
+import SrcLoc ( Located(..), unLoc, noLoc )
import Module ( Module )
+import Bag ( Bag, foldrBag )
\end{code}
All we actually declare here is the top-level structure for a module.
\begin{code}
data HsModule name
= HsModule
- (Maybe Module) -- Nothing => "module X where" is omitted
+ (Maybe (Located Module))-- Nothing => "module X where" is omitted
-- (in which case the next field is Nothing too)
- (Maybe [IE name]) -- Export list; Nothing => export list omitted, so export everything
+ (Maybe [LIE name]) -- Export list; Nothing => export list omitted, so export everything
-- Just [] => export *nothing*
-- Just [...] => as you would expect...
- [ImportDecl name] -- We snaffle interesting stuff out of the
+ [LImportDecl name] -- We snaffle interesting stuff out of the
-- imported interfaces early on, adding that
-- info to TyDecls/etc; so this list is
-- often empty, downstream.
- [HsDecl name] -- Type, class, value, and interface signature decls
+ [LHsDecl name] -- Type, class, value, and interface signature decls
(Maybe DeprecTxt) -- reason/explanation for deprecation of this module
- SrcLoc
data HsExtCore name -- Read from Foo.hcr
= HsExtCore
instance (OutputableBndr name)
=> Outputable (HsModule name) where
- ppr (HsModule Nothing _ imports decls _ src_loc)
+ ppr (HsModule Nothing _ imports decls _)
= pp_nonnull imports $$ pp_nonnull decls
- ppr (HsModule (Just name) exports imports decls deprec src_loc)
+ ppr (HsModule (Just name) exports imports decls deprec)
= vcat [
case exports of
Nothing -> pp_header (ptext SLIT("where"))
Just es -> vcat [
- pp_header lparen,
- nest 8 (fsep (punctuate comma (map ppr es))),
- nest 4 (ptext SLIT(") where"))
+ pp_header lparen,
+ nest 8 (fsep (punctuate comma (map ppr es))),
+ nest 4 (ptext SLIT(") where"))
],
pp_nonnull imports,
pp_nonnull decls
it should return @[x, y, f, a, b]@ (remember, order important).
\begin{code}
-collectLocatedHsBinders :: HsBinds name -> [(name,SrcLoc)]
--- Used at top level only; so no need for an IPBinds case
-collectLocatedHsBinders EmptyBinds = []
-collectLocatedHsBinders (MonoBind b _ _)
- = collectLocatedMonoBinders b
-collectLocatedHsBinders (ThenBinds b1 b2)
- = collectLocatedHsBinders b1 ++ collectLocatedHsBinders b2
-
-collectHsBinders :: HsBinds name -> [name]
-collectHsBinders EmptyBinds = []
-collectHsBinders (IPBinds _) = [] -- Implicit parameters don't create
- -- ordinary bindings
-collectHsBinders (MonoBind b _ _) = collectMonoBinders b
-collectHsBinders (ThenBinds b1 b2) = collectHsBinders b1 ++ collectHsBinders b2
-
-collectLocatedMonoBinders :: MonoBinds name -> [(name,SrcLoc)]
-collectLocatedMonoBinders binds
- = go binds []
- where
- go EmptyMonoBinds acc = acc
- go (PatMonoBind pat _ loc) acc = map (\v->(v,loc)) (collectPatBinders pat) ++ acc
- go (FunMonoBind f _ _ loc) acc = (f,loc) : acc
- go (AndMonoBinds bs1 bs2) acc = go bs1 (go bs2 acc)
-
-collectMonoBinders :: MonoBinds name -> [name]
-collectMonoBinders binds
- = go binds []
- where
- go EmptyMonoBinds acc = acc
- go (PatMonoBind pat _ loc) acc = collectPatBinders pat ++ acc
- go (FunMonoBind f _ _ loc) acc = f : acc
- go (AndMonoBinds bs1 bs2) acc = go bs1 (go bs2 acc)
- go (VarMonoBind v _) acc = v : acc
- go (AbsBinds _ _ dbinds _ binds) acc
- = [dp | (_,dp,_) <- dbinds] ++ go binds acc
+collectGroupBinders :: [HsBindGroup name] -> [Located name]
+collectGroupBinders groups = foldr collect_group [] groups
+ where
+ collect_group (HsBindGroup bag sigs is_rec) acc
+ = foldrBag (collectAcc . unLoc) acc bag
+ collect_group (HsIPBinds _) acc = acc
+
+
+collectAcc :: HsBind name -> [Located name] -> [Located name]
+collectAcc (PatBind pat _) acc = collectLocatedPatBinders pat ++ acc
+collectAcc (FunBind f _ _) acc = f : acc
+collectAcc (VarBind f _) acc = noLoc f : acc
+collectAcc (AbsBinds _ _ dbinds _ binds) acc
+ = [noLoc dp | (_,dp,_) <- dbinds] ++ acc
+ -- ++ foldr collectAcc acc binds
+ -- I don't think we want the binders from the nested binds
+ -- The only time we collect binders from a typechecked
+ -- binding (hence see AbsBinds) is in zonking in TcHsSyn
+
+collectHsBindBinders :: Bag (LHsBind name) -> [name]
+collectHsBindBinders binds = map unLoc (collectHsBindLocatedBinders binds)
+
+collectHsBindLocatedBinders :: Bag (LHsBind name) -> [Located name]
+collectHsBindLocatedBinders binds = foldrBag (collectAcc . unLoc) [] binds
\end{code}
Get all the pattern type signatures out of a bunch of bindings
\begin{code}
-collectSigTysFromHsBinds :: HsBinds name -> [HsType name]
-collectSigTysFromHsBinds EmptyBinds = []
-collectSigTysFromHsBinds (IPBinds _) = []
-collectSigTysFromHsBinds (MonoBind b _ _) = collectSigTysFromMonoBinds b
-collectSigTysFromHsBinds (ThenBinds b1 b2) = collectSigTysFromHsBinds b1 ++
- collectSigTysFromHsBinds b2
-
-
-collectSigTysFromMonoBinds :: MonoBinds name -> [HsType name]
-collectSigTysFromMonoBinds bind
- = go bind []
+collectSigTysFromHsBinds :: [LHsBind name] -> [LHsType name]
+collectSigTysFromHsBinds binds = concat (map collectSigTysFromHsBind binds)
+
+collectSigTysFromHsBind :: LHsBind name -> [LHsType name]
+collectSigTysFromHsBind bind
+ = go (unLoc bind)
where
- go EmptyMonoBinds acc = acc
- go (PatMonoBind pat _ loc) acc = collectSigTysFromPat pat ++ acc
- go (FunMonoBind f _ ms loc) acc = go_matches ms acc
- go (AndMonoBinds bs1 bs2) acc = go bs1 (go bs2 acc)
+ go (PatBind pat _) = collectSigTysFromPat pat
+ go (FunBind f _ ms) = go_matches (map unLoc ms)
-- A binding like x :: a = f y
-- is parsed as FunMonoBind, but for this purpose we
-- want to treat it as a pattern binding
- go_matches [] acc = acc
- go_matches (Match [] (Just sig) _ : matches) acc = sig : go_matches matches acc
- go_matches (match : matches) acc = go_matches matches acc
+ go_matches [] = []
+ go_matches (Match [] (Just sig) _ : matches) = sig : go_matches matches
+ go_matches (match : matches) = go_matches matches
\end{code}
\begin{code}
-collectStmtsBinders :: [Stmt id] -> [id]
-collectStmtsBinders = concatMap collectStmtBinders
+collectStmtsBinders :: [LStmt id] -> [Located id]
+collectStmtsBinders = concatMap collectLStmtBinders
-collectStmtBinders :: Stmt id -> [id]
+collectLStmtBinders = collectStmtBinders . unLoc
+
+collectStmtBinders :: Stmt id -> [Located id]
-- Id Binders for a Stmt... [but what about pattern-sig type vars]?
-collectStmtBinders (BindStmt pat _ _) = collectPatBinders pat
-collectStmtBinders (LetStmt binds) = collectHsBinders binds
-collectStmtBinders (ExprStmt _ _ _) = []
-collectStmtBinders (ResultStmt _ _) = []
+collectStmtBinders (BindStmt pat _) = collectLocatedPatBinders pat
+collectStmtBinders (LetStmt binds) = collectGroupBinders binds
+collectStmtBinders (ExprStmt _ _) = []
+collectStmtBinders (ResultStmt _) = []
collectStmtBinders (RecStmt ss _ _ _) = collectStmtsBinders ss
collectStmtBinders other = panic "collectStmtBinders"
\end{code}
-
projects / ghc-hetmet.git / blobdiff