Mercurial > hg > Gears > GearsAgda
annotate RedBlackTree.agda @ 529:c9be3631cc41
fix insertCase4
author | ryokka |
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date | Tue, 09 Jan 2018 15:43:35 +0900 |
parents | 7719f40e1367 |
children | 63f3df7f5448 |
rev | line source |
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417 | 1 module RedBlackTree where |
2 | |
3 open import stack | |
511 | 4 open import Level |
417 | 5 |
511 | 6 record TreeMethods {n m : Level } {a : Set n } {t : Set m } (treeImpl : Set n ) : Set (m Level.⊔ n) where |
7 field | |
8 putImpl : treeImpl -> a -> (treeImpl -> t) -> t | |
9 getImpl : treeImpl -> (treeImpl -> Maybe a -> t) -> t | |
10 open TreeMethods | |
11 | |
12 record Tree {n m : Level } {a : Set n } {t : Set m } (treeImpl : Set n ) : Set (m Level.⊔ n) where | |
417 | 13 field |
14 tree : treeImpl | |
513 | 15 treeMethods : TreeMethods {n} {m} {a} {t} treeImpl |
16 putTree : a -> (Tree treeImpl -> t) -> t | |
511 | 17 putTree d next = putImpl (treeMethods ) tree d (\t1 -> next (record {tree = t1 ; treeMethods = treeMethods} )) |
513 | 18 getTree : (Tree treeImpl -> Maybe a -> t) -> t |
511 | 19 getTree next = getImpl (treeMethods ) tree (\t1 d -> next (record {tree = t1 ; treeMethods = treeMethods} ) d ) |
427 | 20 |
478 | 21 open Tree |
22 | |
513 | 23 data Color {n : Level } : Set n where |
425 | 24 Red : Color |
25 Black : Color | |
26 | |
512 | 27 data CompareResult {n : Level } : Set n where |
28 LT : CompareResult | |
29 GT : CompareResult | |
30 EQ : CompareResult | |
31 | |
513 | 32 record Node {n : Level } (a k : Set n) : Set n where |
33 inductive | |
425 | 34 field |
512 | 35 key : k |
36 value : a | |
513 | 37 right : Maybe (Node a k) |
38 left : Maybe (Node a k) | |
514 | 39 color : Color {n} |
512 | 40 open Node |
425 | 41 |
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
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42 record RedBlackTree {n m : Level } {t : Set m} (a k si : Set n) : Set (m Level.⊔ n) where |
417 | 43 field |
514 | 44 root : Maybe (Node a k) |
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45 nodeStack : Stack {n} {m} (Node a k) {t} si |
514 | 46 compare : k -> k -> CompareResult {n} |
425 | 47 |
417 | 48 open RedBlackTree |
49 | |
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50 open Stack |
512 | 51 |
518
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52 -- |
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53 -- put new node at parent node, and rebuild tree to the top |
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54 -- |
519
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55 {-# TERMINATING #-} -- https://agda.readthedocs.io/en/v2.5.3/language/termination-checking.html |
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56 replaceNode : {n m : Level } {t : Set m } {a k si : Set n} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) si -> Node a k -> Node a k -> (RedBlackTree {n} {m} {t} a k si -> t) -> t |
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57 replaceNode {n} {m} {t} {a} {k} {si} tree s parent n0 next = popStack s ( |
518
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58 \s grandParent -> replaceNode1 s grandParent ( compare tree (key parent) (key n0) ) ) |
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59 where |
522
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60 replaceNode1 : Stack (Node a k) si -> Maybe ( Node a k ) -> CompareResult -> t |
529 | 61 replaceNode1 s Nothing LT = next ( record tree { root = Just ( record parent { left = Just n0 ; color = Black } ) } ) |
62 replaceNode1 s Nothing GT = next ( record tree { root = Just ( record parent { right = Just n0 ; color = Black } ) } ) | |
63 replaceNode1 s Nothing EQ = next ( record tree { root = Just ( record parent { right = Just n0 ; color = Black } ) } ) | |
518
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64 replaceNode1 s (Just grandParent) result with result |
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65 ... | LT = replaceNode tree s grandParent ( record parent { left = Just n0 } ) next |
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66 ... | GT = replaceNode tree s grandParent ( record parent { right = Just n0 } ) next |
529 | 67 ... | EQ = next tree |
478 | 68 |
525 | 69 |
526 | 70 rotateRight : {n m : Level } {t : Set m } {a k si : Set n} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> Maybe (Node a k) -> Node a k -> |
71 (RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> Maybe (Node a k) -> Node a k -> t) -> t | |
72 rotateRight {n} {m} {t} {a} {k} {si} tree s n0 parent grandParent rotateNext with parent | |
73 ... | Nothing = rotateNext tree s n0 Nothing grandParent | |
74 ... | Just parent1 with left parent1 | |
75 ... | Nothing = rotateNext tree s n0 Nothing grandParent | |
76 ... | Just leftParent with compare tree (key n0) (key leftParent) | |
77 ... | EQ = rotateNext tree s n0 parent grandParent | |
78 ... | _ = rotateNext tree s n0 parent grandParent | |
519
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79 |
529 | 80 rotateLeft : {n m : Level } {t : Set m } {a k si : Set n} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> Maybe (Node a k) -> Node a k -> |
526 | 81 (RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> Maybe (Node a k) -> Node a k -> t) -> t |
529 | 82 rotateLeft {n} {m} {t} {a} {k} {si} tree s n0 parent grandParent rotateNext with parent |
526 | 83 ... | Nothing = rotateNext tree s n0 Nothing grandParent |
84 ... | Just parent1 with right parent1 | |
85 ... | Nothing = rotateNext tree s n0 Nothing grandParent | |
86 ... | Just rightParent with compare tree (key n0) (key rightParent) | |
87 ... | EQ = rotateNext tree s n0 parent grandParent | |
88 ... | _ = rotateNext tree s n0 parent grandParent | |
519
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89 |
522
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90 insertCase5 : {n m : Level } {t : Set m } {a k si : Set n} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> Node a k -> Node a k -> (RedBlackTree {n} {m} {t} a k si -> t) -> t |
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parents:
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91 insertCase5 {n} {m} {t} {a} {k} {si} tree s n0 parent grandParent next = {!!} |
519
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92 |
528 | 93 insertCase4 : {n m : Level } {t : Set m } {a k si : Set n} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> Node a k -> Node a k -> (RedBlackTree {n} {m} {t} a k si -> t) -> t |
527 | 94 insertCase4 {n} {m} {t} {a} {k} {si} tree s n0 parent grandParent next |
528 | 95 with (right parent) | (left grandParent) |
529 | 96 ... | Nothing | _ = insertCase5 tree s n0 parent grandParent next |
97 ... | _ | Nothing = insertCase5 tree s n0 parent grandParent next | |
528 | 98 ... | Just rightParent | Just leftGrandParent with compare tree (key n0) (key rightParent) | compare tree (key parent) (key leftGrandParent) |
529 | 99 ... | EQ | EQ = rotateLeft tree s n0 (Just parent) grandParent {!!} |
100 ... | _ | _ = insertCase5 tree s n0 parent grandParent next | |
527 | 101 |
102 | |
519
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103 {-# TERMINATING #-} |
522
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104 insertNode : {n m : Level } {t : Set m } {a k si : Set n} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) {t} si -> Node a k -> (RedBlackTree {n} {m} {t} a k si -> t) -> t |
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parents:
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105 insertNode {n} {m} {t} {a} {k} {si} tree s n0 next = get2Stack s (\ s d1 d2 -> insertCase1 s n0 d1 d2 ) |
518
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106 where |
522
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107 insertCase1 : Stack (Node a k) si -> Node a k -> Maybe (Node a k) -> Maybe (Node a k) -> t -- placed here to allow mutual recursion |
519
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108 -- http://agda.readthedocs.io/en/v2.5.2/language/mutual-recursion.html |
522
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109 insertCase3 : Stack (Node a k) si -> Node a k -> Node a k -> Node a k -> t |
518
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110 insertCase3 s n0 parent grandParent with left grandParent | right grandParent |
528 | 111 ... | Nothing | Nothing = insertCase4 tree s n0 parent grandParent next |
112 ... | Nothing | Just uncle = insertCase4 tree s n0 parent grandParent next | |
518
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113 ... | Just uncle | _ with compare tree ( key uncle ) ( key parent ) |
528 | 114 ... | EQ = insertCase4 tree s n0 parent grandParent next |
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115 ... | _ with color uncle |
529 | 116 ... | Red = pop2Stack s ( \s p0 p1 -> insertCase1 s ( |
518
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117 record grandParent { color = Red ; left = Just ( record parent { color = Black ; left = Just n0 } ) ; right = Just ( record uncle { color = Black } ) }) p0 p1 ) |
528 | 118 ... | Black = insertCase4 tree s n0 parent grandParent next |
522
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119 insertCase2 : Stack (Node a k) si -> Node a k -> Node a k -> Node a k -> t |
518
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120 insertCase2 s n0 parent grandParent with color parent |
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121 ... | Black = replaceNode tree s grandParent n0 next |
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122 ... | Red = insertCase3 s n0 parent grandParent |
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123 insertCase1 s n0 Nothing Nothing = next tree |
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124 insertCase1 s n0 Nothing (Just grandParent) = replaceNode tree s grandParent n0 next |
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125 insertCase1 s n0 (Just grandParent) Nothing = replaceNode tree s grandParent n0 next |
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126 insertCase1 s n0 (Just parent) (Just grandParent) = insertCase2 s n0 parent grandParent |
528 | 127 |
425 | 128 |
522
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129 findNode : {n m : Level } {a k si : Set n} {t : Set m} -> RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) si -> (Node a k) -> (Node a k) -> (RedBlackTree {n} {m} {t} a k si -> Stack (Node a k) si -> Node a k -> t) -> t |
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
521
diff
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130 findNode {n} {m} {a} {k} {si} {t} tree s n0 n1 next = pushStack s n1 (\ s -> findNode1 s n1) |
417 | 131 where |
522
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parents:
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132 findNode2 : Stack (Node a k) si -> (Maybe (Node a k)) -> t |
515 | 133 findNode2 s Nothing = next tree s n0 |
134 findNode2 s (Just n) = findNode tree s n0 n next | |
522
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parents:
521
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135 findNode1 : Stack (Node a k) si -> (Node a k) -> t |
515 | 136 findNode1 s n1 with (compare tree (key n0) (key n1)) |
529 | 137 ... | EQ = next tree s n0 |
515 | 138 ... | GT = findNode2 s (right n1) |
139 ... | LT = findNode2 s (left n1) | |
425 | 140 |
141 | |
518
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142 leafNode : {n : Level } {a k : Set n} -> k -> a -> Node a k |
515 | 143 leafNode k1 value = record { |
144 key = k1 ; | |
145 value = value ; | |
146 right = Nothing ; | |
147 left = Nothing ; | |
529 | 148 color = Black |
518
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149 } |
417 | 150 |
522
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151 putRedBlackTree : {n m : Level } {a k si : Set n} {t : Set m} -> RedBlackTree {n} {m} {t} a k si -> k -> a -> (RedBlackTree {n} {m} {t} a k si -> t) -> t |
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parents:
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152 putRedBlackTree {n} {m} {a} {k} {si} {t} tree k1 value next with (root tree) |
515 | 153 ... | Nothing = next (record tree {root = Just (leafNode k1 value) }) |
518
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154 ... | Just n2 = findNode tree (nodeStack tree) (leafNode k1 value) n2 (\ tree1 s n1 -> insertNode tree1 s n1 next) |
515 | 155 |
522
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parents:
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156 getRedBlackTree : {n m : Level } {a k si : Set n} {t : Set m} -> RedBlackTree {n} {m} {t} a k si -> k -> (RedBlackTree {n} {m} {t} a k si -> (Maybe (Node a k)) -> t) -> t |
f63a9a081b61
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
521
diff
changeset
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157 getRedBlackTree {_} {_} {a} {k} {_} {t} tree k1 cs = checkNode (root tree) |
417 | 158 where |
515 | 159 checkNode : Maybe (Node a k) -> t |
160 checkNode Nothing = cs tree Nothing | |
161 checkNode (Just n) = search n | |
162 where | |
163 search : Node a k -> t | |
164 search n with compare tree k1 (key n) | |
165 search n | LT = checkNode (left n) | |
166 search n | GT = checkNode (right n) | |
167 search n | EQ = cs tree (Just n) |