Prelude.CAPIT is now a built-in primitive. It still generates &| in the Haskell runtime but will be intepreted in the C runtime

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

@@ -79,7 +79,7 @@ predefList =
      -- Canonical values:
      (cPBool,PBool),(cPFalse,PFalse),(cPTrue,PTrue),(cInt,Int),
      (cInts,Ints),(cNonExist,NonExist)
-     ,(cBIND,BIND),(cSOFT_BIND,SOFT_BIND)]
+     ,(cBIND,BIND),(cSOFT_BIND,SOFT_BIND),(cCAPIT,CAPIT)]
     --- add more functions!!!
 
 delta f vs =
@@ -109,6 +109,7 @@ delta f vs =
       NonExist-> canonical
       BIND    -> canonical
       SOFT_BIND->canonical
+      CAPIT   -> canonical
   where
     canonical = delay
     delay = return (VApp f vs) -- wrong number of arguments

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

@@ -52,5 +52,5 @@ data Predefined = Drop | Take | Tk | Dp | EqStr | Occur | Occurs | ToUpper
                 | Error
                 -- Canonical values below:
                 | PBool | PFalse | PTrue | Int | Ints | NonExist 
-                | BIND | SOFT_BIND
+                | BIND | SOFT_BIND | CAPIT
                 deriving (Show,Eq,Ord,Ix,Bounded,Enum)

src/compiler/GF/Compile/GeneratePMCFG.hs

@@ -443,6 +443,8 @@ convertTerm opts sel ctype (Q (m,f))
     f == cBIND                          = return (CStr [SymBIND])
   | m == cPredef &&
     f == cSOFT_BIND                     = return (CStr [SymSOFT_BIND])
+  | m == cPredef &&
+    f == cCAPIT                         = return (CStr [SymCAPIT])
 
 convertTerm opts sel@(CProj l _) ctype (ExtR t1 t2@(R rs2))
                     | l `elem` map fst rs2 = convertTerm opts sel ctype t2

src/compiler/GF/Compile/PGFtoJS.hs

@@ -89,6 +89,7 @@ sym2js (SymKP ts alts) = new "SymKP"  [JS.EArray (map sym2js ts), JS.EArray (map
 sym2js SymNE           = new "SymNE"  []
 sym2js SymBIND         = new "SymKS"  [JS.EStr "&+"]
 sym2js SymSOFT_BIND    = new "SymKS"  [JS.EStr "&+"]
+sym2js SymCAPIT        = new "SymKS"  [JS.EStr "&|"]
 
 alt2js (ps,ts) = new "Alt" [JS.EArray (map sym2js ps), JS.EArray (map JS.EStr ts)]
 

src/compiler/GF/Compile/PGFtoPython.hs

@@ -79,6 +79,7 @@ pySymbol (SymKP ts alts) = pyDict 0 pyStr id [("pre", pyList 0 pySymbol ts), ("a
     where alt2py (ps,ts) = pyTuple 0 (pyList 0 pyStr) [map pySymbol ps, ts]
 pySymbol SymBIND         = pyStr "&+"
 pySymbol SymSOFT_BIND    = pyStr "&+"
+pySymbol SymCAPIT        = pyStr "&|"
 pySymbol SymNE           = pyDict 0 pyStr id [("nonExist", pyTuple 0 id [])]
 
 ----------------------------------------------------------------------

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

@@ -53,6 +53,8 @@ primitives = Map.fromList
                                          [] typeStr []))) Nothing)
   , (cSOFT_BIND, ResOper (Just (noLoc (mkProd -- Str
                                          [] typeStr []))) Nothing)
+  , (cCAPIT    , ResOper (Just (noLoc (mkProd -- Str
+                                         [] typeStr []))) Nothing)
   ]
   where
     fun from to = oper (mkFunType from to)