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| author | Simon Peyton Jones <simonpj@microsoft.com> | 2014-12-30 13:55:45 +0000 |
|---|---|---|
| committer | Simon Peyton Jones <simonpj@microsoft.com> | 2014-12-30 13:56:01 +0000 |
| commit | 44b65fd86c551c210cc33802fd2073a68eb4b458 (patch) | |
| tree | c3e2d02f942aeda22f351c69049cebb22ff2e54b | |
| parent | a3d6eb7768deb8bc8107c8497fd7714bc2e06710 (diff) | |
| download | haskell-44b65fd86c551c210cc33802fd2073a68eb4b458.tar.gz | |
Comments only (mainly about HsWithBndrs)
| -rw-r--r-- | compiler/hsSyn/HsTypes.hs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/compiler/hsSyn/HsTypes.hs b/compiler/hsSyn/HsTypes.hs index 5d368b33be..badcbe700a 100644 --- a/compiler/hsSyn/HsTypes.hs +++ b/compiler/hsSyn/HsTypes.hs @@ -141,6 +141,10 @@ type LHsType name = Located (HsType name) type HsKind name = HsType name type LHsKind name = Located (HsKind name) +-------------------------------------------------- +-- LHsTyVarBndrs +-- The quantified binders in a HsForallTy + type LHsTyVarBndr name = Located (HsTyVarBndr name) data LHsTyVarBndrs name @@ -164,6 +168,15 @@ emptyHsQTvs = HsQTvs { hsq_kvs = [], hsq_tvs = [] } hsQTvBndrs :: LHsTyVarBndrs name -> [LHsTyVarBndr name] hsQTvBndrs = hsq_tvs +------------------------------------------------ +-- HsWithBndrs +-- Used to quantify the binders of a type in cases +-- when a HsForAll isn't appropriate: +-- * Patterns in a type/data family instance (HsTyPats) +-- * Type of a rule binder (RuleBndr) +-- * Pattern type signatures (SigPatIn) +-- In the last of these, wildcards can happen, so we must accommodate them + data HsWithBndrs name thing = HsWB { hswb_cts :: thing -- Main payload (type or list of types) , hswb_kvs :: PostRn name [Name] -- Kind vars @@ -180,6 +193,7 @@ mkHsWithBndrs x = HsWB { hswb_cts = x, hswb_kvs = PlaceHolder , hswb_wcs = PlaceHolder } +-------------------------------------------------- -- | These names are used early on to store the names of implicit -- parameters. They completely disappear after type-checking. newtype HsIPName = HsIPName FastString-- ?x @@ -196,6 +210,7 @@ instance OutputableBndr HsIPName where pprInfixOcc n = ppr n pprPrefixOcc n = ppr n +-------------------------------------------------- data HsTyVarBndr name = UserTyVar -- no explicit kinding name @@ -218,6 +233,7 @@ isHsKindedTyVar (KindedTyVar {}) = True hsTvbAllKinded :: LHsTyVarBndrs name -> Bool hsTvbAllKinded = all (isHsKindedTyVar . unLoc) . hsQTvBndrs +-------------------------------------------------- -- | - 'ApiAnnotation.AnnKeywordId' : 'ApiAnnotation.AnnDcolon', -- 'ApiAnnotation.AnnTilde','ApiAnnotation.AnnRarrow', -- 'ApiAnnotation.AnnOpen','ApiAnnotation.AnnClose', |