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refactor the PGF.Expr type and the evaluation of abstract expressions
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13
src/PGF/Expr.hs-boot
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13
src/PGF/Expr.hs-boot
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module PGF.Expr where
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import qualified Text.PrettyPrint as PP
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import qualified Text.ParserCombinators.ReadP as RP
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data Expr
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instance Eq Expr
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instance Ord Expr
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pFactor :: RP.ReadP Expr
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ppExpr :: Int -> Expr -> PP.Doc
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