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translate implicit parameters where possible #152

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10 changes: 8 additions & 2 deletions src/PyF/Internal/Meta.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ module PyF.Internal.Meta (toExp, baseDynFlags, toName) where
import qualified Data.List.NonEmpty as NE

#if MIN_VERSION_ghc(9,2,0)
import GHC.Hs.Type (HsWildCardBndrs (..), HsType (..), HsSigType(HsSig), sig_body)
import GHC.Hs.Type (HsWildCardBndrs (..), HsType (..), HsIPName(HsIPName), HsSigType(HsSig), sig_body)
#elif MIN_VERSION_ghc(9,0,0)
import GHC.Hs.Type (HsWildCardBndrs (..), HsType (..), HsImplicitBndrs(HsIB), hsib_body)
#elif MIN_VERSION_ghc(8,10,0)
Expand Down Expand Up @@ -167,7 +167,11 @@ toExp _ (Expr.HsUnboundVar _ n) = TH.UnboundVarE (TH.mkName . occNa
toExp _ (Expr.HsUnboundVar _ n) = TH.UnboundVarE (TH.mkName . occNameString . Expr.unboundVarOcc $ n)
#endif

toExp _ Expr.HsIPVar {} = noTH "toExp" "HsIPVar"
#if MIN_VERSION_ghc(8,8,0)
toExp _ (Expr.HsIPVar _ (HsIPName x)) = TH.ImplicitParamVarE (unpackFS x)
#else
toExp _ Expr.HsIPVar {} = noTH "toExp" "upgrade to ghc>=8.8 for ImplicitParamsVarE"
#endif
toExp _ (Expr.HsLit _ l) = TH.LitE (toLit l)
toExp _ (Expr.HsOverLit _ OverLit {ol_val}) = TH.LitE (toLit' ol_val)
toExp d (Expr.HsApp _ e1 e2) = TH.AppE (toExp d . unLoc $ e1) (toExp d . unLoc $ e2)
Expand Down Expand Up @@ -299,8 +303,10 @@ toExp dynFlags e = todo "toExp" (showSDoc dynFlags . ppr $ e)
todo :: (HasCallStack, Show e) => String -> e -> a
todo fun thing = error . concat $ [moduleName, ".", fun, ": not implemented: ", show thing, "Please open an issue at https://github.com/guibou/PyF/issues"]

#if !MIN_VERSION_ghc(8,8,0)
noTH :: (HasCallStack, Show e) => String -> e -> a
noTH fun thing = error . concat $ [moduleName, ".", fun, ": no TemplateHaskell for: ", show thing, "Please open an issue at https://github.com/guibou/PyF/issues"]
#endif

moduleName :: String
moduleName = "PyF.Internal.Meta"
Expand Down