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refactor the PGF.Expr type and the evaluation of abstract expressions

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krasimir
2009-05-20 21:03:56 +00:00
parent 401dfc28d6
commit 7db4b641ce
32 changed files with 245 additions and 360 deletions
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src/PGF/Expr.hs-boot Normal file
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module PGF.Expr where
import qualified Text.PrettyPrint as PP
import qualified Text.ParserCombinators.ReadP as RP
data Expr
instance Eq Expr
instance Ord Expr
pFactor :: RP.ReadP Expr
ppExpr :: Int -> Expr -> PP.Doc