| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 1 | paulosilva | |
| 2 | {-# OPTIONS_GHC -Wall #-} | ||
| 3 | |||
| 4 | ------------------------------------------------------------------------------- | ||
| 5 | |||
| 6 | {- | | ||
| 7 | Module : Language.R.Constraint | ||
| 8 | Description : Type equation constraints infered from type annotations of | ||
| 9 | representations of functions. | ||
| 10 | Copyright : (c) Paulo Silva | ||
| 11 | License : LGPL | ||
| 12 | |||
| 13 | Maintainer : paufil@di.uminho.pt | ||
| 14 | Stability : experimental | ||
| 15 | Portability : portable | ||
| 16 | |||
| 17 | -} | ||
| 18 | |||
| 19 | ------------------------------------------------------------------------------- | ||
| 20 | |||
| 21 | module Language.R.Constraint ( | ||
| 22 | rConstraint | ||
| 23 | ) where | ||
| 24 | |||
| 25 | import Control.Monad | ||
| 26 | 7 | paulosilva | import Control.MonadOr |
| 27 | 1 | paulosilva | import Language.R.Equality |
| 28 | import Language.R.Syntax | ||
| 29 | import Language.Type.Constraint | ||
| 30 | |||
| 31 | ------------------------------------------------------------------------------- | ||
| 32 | |||
| 33 | 7 | paulosilva | rConstraint :: MonadOr m => R a -> R b -> m [Constraint] |
| 34 | 1 | paulosilva | rConstraint (Var _) _ = return [] |
| 35 | rConstraint _ (Var _) = return [] | ||
| 36 | rConstraint (NEG r) (NEG r') = do | ||
| 37 | rr <- rConstraint r r' | ||
| 38 | return rr | ||
| 39 | rConstraint (MEET r s) (MEET r' s') = do | ||
| 40 | rr <- rConstraint r r' | ||
| 41 | ss <- rConstraint s s' | ||
| 42 | return $ rr ++ ss | ||
| 43 | rConstraint (JOIN r s) (JOIN r' s') = do | ||
| 44 | rr <- rConstraint r r' | ||
| 45 | ss <- rConstraint s s' | ||
| 46 | return $ rr ++ ss | ||
| 47 | rConstraint (CONV r) (CONV r') = do | ||
| 48 | rr <- rConstraint r r' | ||
| 49 | return rr | ||
| 50 | rConstraint (COMP t f g) (COMP t' f' g') = do | ||
| 51 | ff <- rConstraint f f' | ||
| 52 | gg <- rConstraint g g' | ||
| 53 | return $ [t :=: t'] ++ ff ++ gg | ||
| 54 | rConstraint (SPLIT r s) (SPLIT r' s') = do | ||
| 55 | rr <- rConstraint r r' | ||
| 56 | ss <- rConstraint s s' | ||
| 57 | return $ rr ++ ss | ||
| 58 | rConstraint (ORD o) (ORD o') = do | ||
| 59 | oo <- rConstraint o o' | ||
| 60 | return oo | ||
| 61 | rConstraint (FUN f) (FUN f') = do | ||
| 62 | ff <- rConstraint f f' | ||
| 63 | return ff | ||
| 64 | rConstraint (LEFTSEC t s r) (LEFTSEC t' s' r') = do | ||
| 65 | ss <- rConstraint s s' | ||
| 66 | rr <- rConstraint r r' | ||
| 67 | return $ [t :=: t'] ++ ss ++ rr | ||
| 68 | rConstraint (RIGHTSEC t s r) (RIGHTSEC t' s' r') = do | ||
| 69 | ss <- rConstraint s s' | ||
| 70 | rr <- rConstraint r r' | ||
| 71 | return $ [t :=: t'] ++ ss ++ rr | ||
| 72 | rConstraint (APPLY t r v) (APPLY t' r' v') = do | ||
| 73 | rr <- rConstraint r r' | ||
| 74 | vv <- rConstraint v v' | ||
| 75 | return $ [t :=: t'] ++ rr ++ vv | ||
| 76 | rConstraint (DEF n t) (DEF n' t') = do | ||
| 77 | guard (n == n') | ||
| 78 | return [t :=: t'] | ||
| 79 | rConstraint (PROD r s) (PROD r' s') = do | ||
| 80 | rr <- rConstraint r r' | ||
| 81 | ss <- rConstraint s s' | ||
| 82 | return $ rr ++ ss | ||
| 83 | rConstraint (EITHER r s) (EITHER r' s') = do | ||
| 84 | rr <- rConstraint r r' | ||
| 85 | ss <- rConstraint s s' | ||
| 86 | return $ rr ++ ss | ||
| 87 | rConstraint (MAYBE r) (MAYBE r') = do | ||
| 88 | rr <- rConstraint r r' | ||
| 89 | return rr | ||
| 90 | rConstraint (LIST r) (LIST r') = do | ||
| 91 | rr <- rConstraint r r' | ||
| 92 | return rr | ||
| 93 | rConstraint (SET r) (SET r') = do | ||
| 94 | rr <- rConstraint r r' | ||
| 95 | return rr | ||
| 96 | rConstraint (MAP r) (MAP r') = do | ||
| 97 | rr <- rConstraint r r' | ||
| 98 | return rr | ||
| 99 | 5 | paulosilva | rConstraint (REYNOLDS r s) (REYNOLDS r' s') = do |
| 100 | rr <- rConstraint r r' | ||
| 101 | ss <- rConstraint s s' | ||
| 102 | return $ rr ++ ss | ||
| 103 | 1 | paulosilva | rConstraint (FComp t f g) (FComp t' f' g') = do |
| 104 | ff <- rConstraint f f' | ||
| 105 | gg <- rConstraint g g' | ||
| 106 | return $ [t :=: t'] ++ ff ++ gg | ||
| 107 | rConstraint (OComp r s) (OComp r' s') = do | ||
| 108 | rr <- rConstraint r r' | ||
| 109 | ss <- rConstraint s s' | ||
| 110 | return $ rr ++ ss | ||
| 111 | rConstraint (OConv r) (OConv r') = do | ||
| 112 | rr <- rConstraint r r' | ||
| 113 | return rr | ||
| 114 | rConstraint (OJoin r) (OJoin r') = do | ||
| 115 | rr <- rConstraint r r' | ||
| 116 | return rr | ||
| 117 | rConstraint (OMax r) (OMax r') = do | ||
| 118 | rr <- rConstraint r r' | ||
| 119 | return rr | ||
| 120 | rConstraint (OMin r) (OMin r') = do | ||
| 121 | rr <- rConstraint r r' | ||
| 122 | return rr | ||
| 123 | rConstraint (GDef n f1 f2 o1 o2) (GDef n' f1' f2' o1' o2') = do | ||
| 124 | guard (n == n') | ||
| 125 | ff1 <- rConstraint f1 f1' | ||
| 126 | ff2 <- rConstraint f2 f2' | ||
| 127 | oo1 <- rConstraint o1 o1' | ||
| 128 | oo2 <- rConstraint o2 o2' | ||
| 129 | return $ ff1 ++ ff2 ++ oo1 ++ oo2 | ||
| 130 | rConstraint (GComp t f g) (GComp t' f' g') = do | ||
| 131 | ff <- rConstraint f f' | ||
| 132 | gg <- rConstraint g g' | ||
| 133 | return $ [t :=: t'] ++ ff ++ gg | ||
| 134 | rConstraint (GConv r) (GConv r') = do | ||
| 135 | rr <- rConstraint r r' | ||
| 136 | return rr | ||
| 137 | rConstraint (GLAdj r) (GLAdj r') = do | ||
| 138 | rr <- rConstraint r r' | ||
| 139 | return rr | ||
| 140 | rConstraint (GUAdj r) (GUAdj r') = do | ||
| 141 | rr <- rConstraint r r' | ||
| 142 | return rr | ||
| 143 | rConstraint (GLOrd t r) (GLOrd t' r') = do | ||
| 144 | rr <- rConstraint r r' | ||
| 145 | return $ [t :=: t'] ++ rr | ||
| 146 | rConstraint (GUOrd t r) (GUOrd t' r') = do | ||
| 147 | rr <- rConstraint r r' | ||
| 148 | return $ [t :=: t'] ++ rr | ||
| 149 | rConstraint f g = | ||
| 150 | if req f g then return [] else mzero | ||
| 151 | |||
| 152 | ------------------------------------------------------------------------------- |