X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FhsSyn%2FHsExpr.lhs;h=b7fe6fc1331324faab65b036fd36d9d2d5342da8;hp=56fc9a76b667cab2b9484109d6af4b2b04f710f1;hb=16b9e80dc14db24509f051f294b5b51943285090;hpb=ba05282d3915e7051b3f016366b971a8506b0093

diff --git a/compiler/hsSyn/HsExpr.lhs b/compiler/hsSyn/HsExpr.lhs
index 56fc9a7..b7fe6fc 100644
--- a/compiler/hsSyn/HsExpr.lhs
+++ b/compiler/hsSyn/HsExpr.lhs
@@ -223,6 +223,13 @@ data HsExpr id
                 (LHsCmdTop id)          -- body of the abstraction
                                         -- always has an empty stack
 
+  -----------------------------------------------------------
+  -- Heterogeneous Metaprogramming extension
+
+  | HsHetMetBrak  PostTcType            (LHsExpr id)            -- code type brackets
+  | HsHetMetEsc   PostTcType PostTcType (LHsExpr id)            -- code type escape
+  | HsHetMetCSP   PostTcType            (LHsExpr id)            -- code type cross-stage persistence
+
   ---------------------------------------
   -- The following are commands, not expressions proper
 
@@ -353,6 +360,9 @@ ppr_expr (HsIPVar v)     = ppr v
 ppr_expr (HsLit lit)     = ppr lit
 ppr_expr (HsOverLit lit) = ppr lit
 ppr_expr (HsPar e)       = parens (ppr_lexpr e)
+ppr_expr (HsHetMetBrak _   e) = ptext (sLit "<[") <> (ppr_lexpr e) <> ptext (sLit "]>")
+ppr_expr (HsHetMetEsc  _ _ e) = ptext (sLit "~~") <> (ppr_lexpr e)
+ppr_expr (HsHetMetCSP  _   e) = ptext (sLit "%%") <> (ppr_lexpr e)
 
 ppr_expr (HsCoreAnn s e)
   = vcat [ptext (sLit "HsCoreAnn") <+> ftext s, ppr_lexpr e]
@@ -1161,11 +1171,15 @@ data HsMatchContext id  -- Context of a Match
   | LambdaExpr                  -- Patterns of a lambda
   | CaseAlt                     -- Patterns and guards on a case alternative
   | ProcExpr                    -- Patterns of a proc
-  | PatBindRhs                  -- Patterns in the *guards* of a pattern binding
+  | PatBindRhs                  -- A pattern binding  eg [y] <- e = e
+
   | RecUpd                      -- Record update [used only in DsExpr to
                                 --    tell matchWrapper what sort of
                                 --    runtime error message to generate]
-  | StmtCtxt (HsStmtContext id) -- Pattern of a do-stmt or list comprehension
+
+  | StmtCtxt (HsStmtContext id) -- Pattern of a do-stmt, list comprehension, 
+    	     		    	-- pattern guard, etc
+
   | ThPatQuote			-- A Template Haskell pattern quotation [p| (a,b) |]
   deriving (Data, Typeable)