X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FhsSyn%2FHsTypes.lhs;fp=compiler%2FhsSyn%2FHsTypes.lhs;h=def44c5917e573bb87914e989186989eee1f1934;hp=38608a48a2a8a774e607dd6d637e17c12740b548;hb=34c8d0312071f7d0f4d221a997d3408c653ef9e5;hpb=cb8fb4dc68b503474bd65c0a669d9018a3ce96fe

diff --git a/compiler/hsSyn/HsTypes.lhs b/compiler/hsSyn/HsTypes.lhs
index 38608a4..def44c5 100644
--- a/compiler/hsSyn/HsTypes.lhs
+++ b/compiler/hsSyn/HsTypes.lhs
@@ -155,6 +155,8 @@ data HsType name
 
   | HsPArrTy		(LHsType name)	-- Elem. type of parallel array: [:t:]
 
+  | HsModalBoxType	name (LHsType name)	-- modal types; first argument is the environment classifier
+
   | HsTupleTy		Boxity
 			[LHsType name]	-- Element types (length gives arity)
 
@@ -439,6 +441,7 @@ ppr_mono_ty _    (HsTupleTy con tys) = tupleParens con (interpp'SP tys)
 ppr_mono_ty _    (HsKindSig ty kind) = parens (ppr_mono_lty pREC_TOP ty <+> dcolon <+> pprKind kind)
 ppr_mono_ty _    (HsListTy ty)	     = brackets (ppr_mono_lty pREC_TOP ty)
 ppr_mono_ty _    (HsPArrTy ty)	     = pabrackets (ppr_mono_lty pREC_TOP ty)
+ppr_mono_ty _    (HsModalBoxType ecn ty) = ppr_modalBoxType (ppr ecn) (ppr_mono_lty pREC_TOP ty)
 ppr_mono_ty _    (HsPredTy pred)     = ppr pred
 ppr_mono_ty _    (HsNumTy n)         = integer n  -- generics only
 ppr_mono_ty _    (HsSpliceTy s _ _)  = pprSplice s
@@ -476,6 +479,10 @@ ppr_fun_ty ctxt_prec ty1 ty2
 --------------------------
 pabrackets :: SDoc -> SDoc
 pabrackets p = ptext (sLit "[:") <> p <> ptext (sLit ":]")
+
+ppr_modalBoxType :: SDoc -> SDoc -> SDoc
+ppr_modalBoxType ecn p = ptext (sLit "<[") <> p <> ptext (sLit "]>@") <> ecn 
+
 \end{code}