[project @ 2002-10-11 14:46:02 by simonpj]

[ghc-hetmet.git] / ghc / compiler / typecheck / TcExpr.lhs

diff --git a/ghc/compiler/typecheck/TcExpr.lhs b/ghc/compiler/typecheck/TcExpr.lhs
index b38d28b..f424dbc 100644 (file)
--- a/ghc/compiler/typecheck/TcExpr.lhs
+++ b/ghc/compiler/typecheck/TcExpr.lhs
@@ -10,12 +10,13 @@ module TcExpr ( tcExpr, tcExpr_id, tcMonoExpr ) where
 
 #ifdef GHCI    /* Only if bootstrapped */
 import {-# SOURCE #-}  TcSplice( tcSpliceExpr, tcBracket )
-import TcEnv           ( bracketOK )
+import HsSyn           ( HsReify(..), ReifyFlavour(..) )
+import TcEnv           ( bracketOK, tcMetaTy )
 import TcSimplify      ( tcSimplifyBracket )
-import DsMeta          ( liftName )
+import qualified DsMeta
 #endif
 
-import HsSyn           ( HsExpr(..), HsLit(..), ArithSeqInfo(..), 
+import HsSyn           ( HsExpr(..), HsLit(..), ArithSeqInfo(..),
                          mkMonoBind, recBindFields
                        )
 import RnHsSyn         ( RenamedHsExpr, RenamedRecordBinds )
@@ -32,7 +33,7 @@ import Inst           ( InstOrigin(..),
                        )
 import TcBinds         ( tcBindsAndThen )
 import TcEnv           ( tcLookupClass, tcLookupGlobal_maybe, tcLookupIdLvl,
-                         tcLookupTyCon, tcLookupDataCon, tcLookupId,
+                         tcLookupTyCon, tcLookupDataCon, tcLookupId, tcLookupGlobal,
                          wellStaged, metaLevel
                        )
 import TcMatches       ( tcMatchesCase, tcMatchLambda, tcDoStmts )
@@ -647,6 +648,23 @@ tcMonoExpr (HsBracket brack loc) res_ty
     readMutVar pending_splices         `thenM` \ pendings ->
     returnM (HsBracketOut brack pendings)
     }
+
+tcMonoExpr (HsReify (Reify flavour name)) res_ty
+  = addErrCtxt (ptext SLIT("At the reification of") <+> ppr name)      $
+    tcLookupGlobal name                `thenM` \ thing ->
+       -- For now, we can only reify top-level things
+       -- The complication for non-top-level things is just that 
+       -- they might be a TcId, and need zonking etc.
+
+    tcMetaTy  tycon_name       `thenM` \ reify_ty ->
+    unifyTauTy res_ty reify_ty `thenM_`
+
+    returnM (HsReify (ReifyOut flavour thing))
+  where
+    tycon_name = case flavour of
+                  ReifyDecl -> DsMeta.decTyConName
+                  ReifyType -> DsMeta.typTyConName
+                  ReifyFixity -> pprPanic "tcMonoExpr: cant do reifyFixity yet" (ppr name)
 #endif GHCI
 \end{code}
 
@@ -834,7 +852,7 @@ tcId name   -- Look up the Id and instantiate its type
                    -- just going to flag an error for now
 
        setLIEVar lie_var       (
-       newMethodFromName orig id_ty liftName   `thenM` \ lift ->
+       newMethodFromName orig id_ty DsMeta.liftName    `thenM` \ lift ->
                -- Put the 'lift' constraint into the right LIE
        
        -- Update the pending splices