import TcPat
import TcMType
import TcType
-import RnBinds( misplacedSigErr )
import Coercion
import TysPrim
import Id
import Outputable
import FastString
-import Data.List( partition )
import Control.Monad
#include "HsVersions.h"
tcPolyBinds top_lvl sig_fn prag_fn rec_group rec_tc bind_list
= setSrcSpan loc $
recoverM (recoveryCode binder_names sig_fn) $ do
- -- Set up main recoer; take advantage of any type sigs
+ -- Set up main recover; take advantage of any type sigs
{ traceTc "------------------------------------------------" empty
; traceTc "Bindings for" (ppr binder_names)
+ -- Instantiate the polytypes of any binders that have signatures
+ -- (as determined by sig_fn), returning a TcSigInfo for each
; tc_sig_fn <- tcInstSigs sig_fn binder_names
; dflags <- getDOpts
; return (binds, poly_ids) }
where
binder_names = collectHsBindListBinders bind_list
- loc = getLoc (head bind_list)
- -- TODO: location a bit awkward, but the mbinds have been
- -- dependency analysed and may no longer be adjacent
+ loc = foldr1 combineSrcSpans (map getLoc bind_list)
+ -- The mbinds have been dependency analysed and
+ -- may no longer be adjacent; so find the narrowest
+ -- span that includes them all
------------------
tcPolyNoGen
-- it binds a single variable,
-- it has a signature,
tcPolyCheck sig@(TcSigInfo { sig_id = id, sig_tvs = tvs, sig_scoped = scoped
- , sig_theta = theta, sig_tau = tau, sig_loc = loc })
+ , sig_theta = theta, sig_tau = tau })
prag_fn rec_tc bind_list
= do { ev_vars <- newEvVars theta
; let skol_info = SigSkol (FunSigCtxt (idName id)) (mkPhiTy theta tau)
; export <- mkExport prag_fn tvs theta mono_info
+ ; loc <- getSrcSpanM
; let (_, poly_id, _, _) = export
abs_bind = L loc $ AbsBinds
{ abs_tvs = tvs
-- dependencies based on type signatures
-> [LHsBind Name]
-> TcM (LHsBinds TcId, [TcId])
-tcPolyInfer top_lvl mono sig_fn prag_fn rec_tc bind_list
+tcPolyInfer top_lvl mono tc_sig_fn prag_fn rec_tc bind_list
= do { ((binds', mono_infos), wanted)
<- captureConstraints $
- tcMonoBinds sig_fn LetLclBndr rec_tc bind_list
+ tcMonoBinds tc_sig_fn LetLclBndr rec_tc bind_list
; unifyCtxts [sig | (_, Just sig, _) <- mono_infos]
tcImpPrags :: [LSig Name] -> TcM [LTcSpecPrag]
tcImpPrags prags
= do { this_mod <- getModule
- ; let is_imp prag
- = case sigName prag of
- Nothing -> False
- Just name -> not (nameIsLocalOrFrom this_mod name)
- (spec_prags, others) = partition isSpecLSig $
- filter is_imp prags
- ; mapM_ misplacedSigErr others
- -- Messy that this misplaced-sig error comes here
- -- but the others come from the renamer
- ; mapAndRecoverM (wrapLocM tcImpSpec) spec_prags }
-
-tcImpSpec :: Sig Name -> TcM TcSpecPrag
-tcImpSpec prag@(SpecSig (L _ name) _ _)
+ ; mapAndRecoverM (wrapLocM tcImpSpec)
+ [L loc (name,prag) | (L loc prag@(SpecSig (L _ name) _ _)) <- prags
+ , not (nameIsLocalOrFrom this_mod name) ] }
+
+tcImpSpec :: (Name, Sig Name) -> TcM TcSpecPrag
+tcImpSpec (name, prag)
= do { id <- tcLookupId name
; checkTc (isAnyInlinePragma (idInlinePragma id))
(impSpecErr name)
; tcSpec id prag }
-tcImpSpec p = pprPanic "tcImpSpec" (ppr p)
impSpecErr :: Name -> SDoc
impSpecErr name