Add quasi-quotation, courtesy of Geoffrey Mainland

[ghc-hetmet.git] / compiler / hsSyn / HsPat.lhs

diff --git a/compiler/hsSyn/HsPat.lhs b/compiler/hsSyn/HsPat.lhs
index 87f4717..266cff2 100644 (file)
--- a/compiler/hsSyn/HsPat.lhs
+++ b/compiler/hsSyn/HsPat.lhs
@@ -19,6 +19,8 @@ module HsPat (
        HsConPatDetails, hsConPatArgs, 
        HsRecFields(..), HsRecField(..), hsRecFields,
 
+       HsQuasiQuote(..),
+
        mkPrefixConPat, mkCharLitPat, mkNilPat, mkCoPat, mkCoPatCoI,
 
        isBangHsBind,   
@@ -46,6 +48,7 @@ import TyCon
 import Outputable      
 import Type
 import SrcLoc
+import FastString
 \end{code}
 
 
@@ -113,6 +116,10 @@ data Pat id
                                     -- (= the argument type of the view function)
                                     -- for hsPatType.
 
+       ------------ Quasiquoted patterns ---------------
+       -- See Note [Quasi-quote overview] in TcSplice
+  | QuasiQuotePat   (HsQuasiQuote id)
+
        ------------ Literal and n+k patterns ---------------
   | LitPat         HsLit               -- Used for *non-overloaded* literal patterns:
                                        -- Int#, Char#, Int, Char, String, etc.
@@ -200,6 +207,14 @@ hsRecFields :: HsRecFields id arg -> [id]
 hsRecFields rbinds = map (unLoc . hsRecFieldId) (rec_flds rbinds)
 \end{code}
 
+\begin{code}
+data HsQuasiQuote id = HsQuasiQuote 
+                      id
+                      id
+                      SrcSpan
+                      FastString
+\end{code}
+
 
 %************************************************************************
 %*                                                                     *
@@ -247,6 +262,10 @@ pprPat (LitPat s)        = ppr s
 pprPat (NPat l Nothing  _)  = ppr l
 pprPat (NPat l (Just _) _)  = char '-' <> ppr l
 pprPat (NPlusKPat n k _ _)    = hcat [ppr n, char '+', ppr k]
+pprPat (QuasiQuotePat (HsQuasiQuote name quoter _ quote)) 
+    = char '$' <> brackets (ppr name) <>
+      ptext SLIT("[:") <> ppr quoter <> ptext SLIT("|") <>
+      ppr quote <> ptext SLIT("|]")
 pprPat (TypePat ty)          = ptext SLIT("{|") <> ppr ty <> ptext SLIT("|}")
 pprPat (CoPat co pat _)              = parens (pprHsWrapper (ppr pat) co)
 pprPat (SigPatIn pat ty)      = ppr pat <+> dcolon <+> ppr ty