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Fix a problem with pattern macros in pre { } expressions

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The old partial evaluator has special rules to convert pattern macros in
pre { } expressions. These rules were missing in the new partial evaluator.
This commit is contained in:
hallgren
2013-03-16 13:36:23 +00:00
parent 34fddf669f
commit c823b7fd91
2 changed files with 19 additions and 7 deletions
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22
src/compiler/GF/Compile/GeneratePMCFG.hs
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@@ -374,12 +374,22 @@ convertTerm opts sel ctype (K t) = return (CStr [SymKS [t]])
convertTerm opts sel ctype Empty = return (CStr [])
convertTerm opts sel ctype (Alts s alts)
= return (CStr [SymKP (strings s) [Alt (strings u) (strings v) | (u,v) <- alts]])
where
strings (K s) = [s]
strings (C u v) = strings u ++ strings v
strings (Strs ss) = concatMap strings ss
strings Empty = [] -- ??
strings t = bug $ "strings "++show t
where
strings (K s) = [s]
strings (C u v) = strings u ++ strings v
strings (Strs ss) = concatMap strings ss
strings (EPatt p) = getPatts p
strings Empty = [] -- ??
strings t = bug $ "strings "++show t
getPatts p =
case p of
PAlt a b -> getPatts a ++ getPatts b
PString s -> [s]
PSeq a b -> [s ++ t | s <- getPatts a, t <- getPatts b]
_ -> ppbug $ hang (text "not valid pattern in pre expression:")
4
(ppPatt Unqualified 0 p)
convertTerm opts sel@(CProj l _) ctype (ExtR t1 t2@(R rs2))
| l `elem` map fst rs2 = convertTerm opts sel ctype t2