1 module PreludeBuiltin where
3 --- 2-tuples ------------------------------------------
10 import List ( (++), foldr )
11 import Prel ( (&&), (.) )
12 import PS ( _PackedString, _unpackPS )
15 instance (Eq a, Eq b) => Eq (a, b) where
16 (a,b) == (c,d) = a == c && b == d
18 instance (Ord a, Ord b) => Ord (a, b) where
19 a < b = case _tagCmp a b of { _LT -> True; _EQ -> False; _GT -> False }
20 a <= b = case _tagCmp a b of { _LT -> True; _EQ -> True; _GT -> False }
21 a >= b = case _tagCmp a b of { _LT -> False; _EQ -> True; _GT -> True }
22 a > b = case _tagCmp a b of { _LT -> False; _EQ -> False; _GT -> True }
23 max a b = case _tagCmp a b of { _LT -> b; _EQ -> a; _GT -> a }
24 min a b = case _tagCmp a b of { _LT -> a; _EQ -> a; _GT -> b }
25 _tagCmp (a1, b1) (a2, b2) = case (_tagCmp a1 a2) of
30 instance (Ix a, Ix b) => Ix (a, b) where
31 range ((l1,l2),(u1,u2))
32 = [ (i1,i2) | i1 <- range (l1,u1), i2 <- range (l2,u2) ]
34 index ((l1,l2),(u1,u2)) (i1,i2)
35 = index (l1,u1) i1 * (index (l2,u2) u2 + 1){-rangeSize (l2,u2)-} + index (l2,u2) i2
37 inRange ((l1,l2),(u1,u2)) (i1,i2)
38 = inRange (l1,u1) i1 && inRange (l2,u2) i2
40 instance (Text a, Text b) => Text (a, b) where
41 readsPrec p = readParen False
42 (\r -> [((x,y), w) | ("(",s) <- lex r,
48 showsPrec p (x,y) = showChar '(' . shows x . showString ", " .
49 shows y . showChar ')'
51 {-# SPECIALIZE instance Eq (Int, Int) #-}
52 {-# SPECIALIZE instance Ord (Int, Int) #-}
53 {-# SPECIALIZE instance Ix (Int, Int) #-}
54 {-# SPECIALIZE instance Text (Int, Int) #-}
56 {-# SPECIALIZE instance Text (Integer, Integer) #-}
58 {-# SPECIALIZE instance Eq (_PackedString, _PackedString) #-}
59 {-# SPECIALIZE instance Ord (_PackedString, _PackedString) #-}
61 #if defined(__UNBOXED_INSTANCES__)
62 -- We generate SPECIALIZED instances for all combinations of unboxed pairs
64 {-# GENERATE_SPECS instance a b :: Eq (a,b) #-}
65 {-# GENERATE_SPECS instance a b :: Ord (a,b) #-}
66 {-# GENERATE_SPECS instance a{Char#,Int#} b{Char#,Int#} :: Ix (a,b) #-}
67 {-# GENERATE_SPECS instance a b :: Text (a,b) #-}
69 #endif {-UNBOXED INSTANCES-}