Fix an old name shadowing bug in concrete syntax by removing the refresh pass

The refresh pass does not correctly keep track of the scope of local variables
and can convert things like \x->(\x->x) x into \x1->(\x2->x2) x2. Fortunately,
it appears that the refresh pass is not needed anymore, so it has been removed.

gf.cabal

@@ -184,7 +184,7 @@ executable gf
     GF.Grammar.Binary
     GF.Compile.Update
     GF.Compile.CheckGrammar
-    GF.Compile.Refresh
+--  GF.Compile.Refresh
     GF.Compile.Rename
     GF.Compile.ReadFiles
     GF.Compile.GrammarToPGF

src/compiler/GF/Compile.hs

@@ -12,7 +12,7 @@ import GF.Compile.GeneratePMCFG
 import GF.Compile.GrammarToPGF
 import GF.Compile.ReadFiles
 import GF.Compile.Update
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Compile.Coding
 import GF.Compile.Tags
 
@@ -196,8 +196,10 @@ compileSourceModule opts env@(k,gr,_) mb_gfFile mo@(i,mi) = do
       if tagsFlag then generateTags k mo3 else compileCompleteModule k mo3
   where
     compileCompleteModule k mo3 = do
-      (k',mo3r:_) <- runPass2 (head.snd) Refresh "refreshing" $
-                     refreshModule (k,gr) mo3
+--    (k',mo3r:_) <- runPass2 (head.snd) Refresh "refreshing" $
+--                   refreshModule (k,gr) mo3
+      let k' = k
+          mo3r = mo3
       mo4 <- runPass2 id Optimize "optimizing" $ optimizeModule opts gr mo3r
       mo5 <- if isModCnc (snd mo4) && flag optPMCFG opts
              then runPass2' "generating PMCFG" $ generatePMCFG opts gr mb_gfFile mo4

src/compiler/GF/Compile/Compute/ConcreteLazy.hs

@@ -24,7 +24,7 @@ import GF.Grammar.Printer
 import GF.Grammar.Predef
 import GF.Grammar.Macros
 import GF.Grammar.Lookup
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Grammar.PatternMatch
 import GF.Grammar.Lockfield (isLockLabel,unlockRecord) ----
 

src/compiler/GF/Compile/Compute/ConcreteStrict.hs

@@ -18,14 +18,14 @@ import GF.Data.Operations
 import GF.Grammar.Grammar
 import GF.Infra.Ident
 import GF.Infra.Option
-import GF.Infra.Modules
+--import GF.Infra.Modules
 import GF.Data.Str
 import GF.Grammar.ShowTerm
 import GF.Grammar.Printer
 import GF.Grammar.Predef
 import GF.Grammar.Macros
 import GF.Grammar.Lookup
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Grammar.PatternMatch
 import GF.Grammar.Lockfield (isLockLabel,unlockRecord) ----
 

src/compiler/GF/Compile/Optimize.hs

@@ -21,7 +21,7 @@ import GF.Grammar.Printer
 import GF.Grammar.Macros
 import GF.Grammar.Lookup
 import GF.Grammar.Predef
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Compile.Compute.Concrete
 import GF.Compile.CheckGrammar
 import GF.Compile.Update

src/compiler/GF/Compile/Refresh.hs

@@ -12,10 +12,10 @@
 -- (Description of the module)
 -----------------------------------------------------------------------------
 
-module GF.Compile.Refresh (refreshTerm, refreshTermN,
-		refreshModule
+module GF.Compile.Refresh ({-refreshTermN, refreshTerm,
+		refreshModule-}
 	       ) where
-
+{-
 import GF.Data.Operations
 import GF.Grammar.Grammar
 import GF.Infra.Ident
@@ -143,3 +143,4 @@ inBlockSTM mo = do
   return v
 
 
+-}

src/compiler/GF/Compile/TypeCheck/Abstract.hs

@@ -25,7 +25,7 @@ import GF.Infra.CheckM
 import GF.Grammar
 import GF.Grammar.Lookup
 import GF.Grammar.Unify
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Compile.Compute.Abstract
 import GF.Compile.TypeCheck.TC
 

src/compiler/GF/Grammar/MMacros.hs

@@ -20,7 +20,7 @@ import GF.Data.Operations
 import GF.Grammar.Grammar
 import GF.Grammar.Printer
 import GF.Infra.Ident
-import GF.Compile.Refresh
+--import GF.Compile.Refresh
 import GF.Grammar.Values
 ----import GrammarST
 import GF.Grammar.Macros
@@ -160,12 +160,12 @@ substitute v s = return . substTerm v s
 alphaConv :: [Var] -> (Var,Var) -> Exp -> Err Exp ---
 alphaConv oldvars (x,x') = substitute (x:x':oldvars) [(x,Vr x')]
 
-alphaFresh :: [Var] -> Exp -> Err Exp
-alphaFresh vs = refreshTermN $ maxVarIndex vs
+--alphaFresh :: [Var] -> Exp -> Err Exp
+--alphaFresh vs = refreshTermN $ maxVarIndex vs
 
 -- | done in a state monad
-alphaFreshAll :: [Var] -> [Exp] -> Err [Exp]
-alphaFreshAll vs = mapM $ alphaFresh vs 
+--alphaFreshAll :: [Var] -> [Exp] -> Err [Exp]
+--alphaFreshAll vs = mapM $ alphaFresh vs
 
 -- | for display
 val2exp :: Val -> Err Exp