Mercurial > hg > Members > Moririn
annotate hoareBinaryTree.agda @ 666:f344e6b254d8
...
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 22 Nov 2021 14:50:09 +0900 |
| parents | 1708fe988ac5 |
| children | eb3721179793 |
| rev | line source |
|---|---|
|
586
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
1 module hoareBinaryTree where |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
2 |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
3 open import Level renaming (zero to Z ; suc to succ) |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
4 |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
5 open import Data.Nat hiding (compare) |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
6 open import Data.Nat.Properties as NatProp |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
7 open import Data.Maybe |
| 588 | 8 -- open import Data.Maybe.Properties |
|
586
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
9 open import Data.Empty |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
10 open import Data.List |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
11 open import Data.Product |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
12 |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
13 open import Function as F hiding (const) |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
14 |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
15 open import Relation.Binary |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
16 open import Relation.Binary.PropositionalEquality |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
17 open import Relation.Nullary |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
18 open import logic |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
19 |
|
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
20 |
| 588 | 21 _iso_ : {n : Level} {a : Set n} → ℕ → ℕ → Set |
| 22 d iso d' = (¬ (suc d ≤ d')) ∧ (¬ (suc d' ≤ d)) | |
| 23 | |
| 24 iso-intro : {n : Level} {a : Set n} {x y : ℕ} → ¬ (suc x ≤ y) → ¬ (suc y ≤ x) → _iso_ {n} {a} x y | |
| 25 iso-intro = λ z z₁ → record { proj1 = z ; proj2 = z₁ } | |
| 26 | |
| 590 | 27 -- |
| 28 -- | |
| 29 -- no children , having left node , having right node , having both | |
| 30 -- | |
| 597 | 31 data bt {n : Level} (A : Set n) : Set n where |
| 604 | 32 leaf : bt A |
| 33 node : (key : ℕ) → (value : A) → | |
| 610 | 34 (left : bt A ) → (right : bt A ) → bt A |
| 600 | 35 |
| 620 | 36 node-key : {n : Level} {A : Set n} → bt A → Maybe ℕ |
| 37 node-key (node key _ _ _) = just key | |
| 38 node-key _ = nothing | |
| 39 | |
| 40 node-value : {n : Level} {A : Set n} → bt A → Maybe A | |
| 41 node-value (node _ value _ _) = just value | |
| 42 node-value _ = nothing | |
| 43 | |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
44 bt-depth : {n : Level} {A : Set n} → (tree : bt A ) → ℕ |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
45 bt-depth leaf = 0 |
| 618 | 46 bt-depth (node key value t t₁) = suc (Data.Nat._⊔_ (bt-depth t ) (bt-depth t₁ )) |
| 606 | 47 |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
48 find : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → (tree : bt A ) → List (bt A) |
| 604 | 49 → (next : bt A → List (bt A) → t ) → (exit : bt A → List (bt A) → t ) → t |
| 50 find key leaf st _ exit = exit leaf st | |
| 632 | 51 find key (node key₁ v1 tree tree₁) st next exit with <-cmp key key₁ |
| 604 | 52 find key n st _ exit | tri≈ ¬a b ¬c = exit n st |
| 632 | 53 find key n@(node key₁ v1 tree tree₁) st next _ | tri< a ¬b ¬c = next tree (n ∷ st) |
| 54 find key n@(node key₁ v1 tree tree₁) st next _ | tri> ¬a ¬b c = next tree₁ (n ∷ st) | |
| 597 | 55 |
| 604 | 56 {-# TERMINATING #-} |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
57 find-loop : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → bt A → List (bt A) → (exit : bt A → List (bt A) → t) → t |
| 611 | 58 find-loop {n} {m} {A} {t} key tree st exit = find-loop1 tree st where |
| 604 | 59 find-loop1 : bt A → List (bt A) → t |
| 60 find-loop1 tree st = find key tree st find-loop1 exit | |
| 600 | 61 |
| 611 | 62 replaceNode : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → (value : A) → bt A → (bt A → t) → t |
| 632 | 63 replaceNode k v1 leaf next = next (node k v1 leaf leaf) |
| 64 replaceNode k v1 (node key value t t₁) next = next (node k v1 t t₁) | |
| 611 | 65 |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
66 replace : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → (value : A) → bt A → List (bt A) → (next : ℕ → A → bt A → List (bt A) → t ) → (exit : bt A → t) → t |
| 604 | 67 replace key value tree [] next exit = exit tree |
| 664 | 68 replace key value tree (leaf ∷ []) next exit = exit (node key value leaf leaf) |
| 69 replace key value tree (node key₁ value₁ left right ∷ []) next exit with <-cmp key key₁ | |
| 70 ... | tri< a ¬b ¬c = exit (node key₁ value₁ tree right ) | |
| 71 ... | tri≈ ¬a b ¬c = exit (node key₁ value left right ) | |
| 72 ... | tri> ¬a ¬b c = exit (node key₁ value₁ left tree ) | |
| 73 replace key value tree (leaf ∷ st) next exit = next key value (node key value leaf leaf) st | |
| 604 | 74 replace key value tree (node key₁ value₁ left right ∷ st) next exit with <-cmp key key₁ |
| 75 ... | tri< a ¬b ¬c = next key value (node key₁ value₁ tree right ) st | |
| 76 ... | tri≈ ¬a b ¬c = next key value (node key₁ value left right ) st | |
| 77 ... | tri> ¬a ¬b c = next key value (node key₁ value₁ left tree ) st | |
|
586
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
78 |
| 604 | 79 {-# TERMINATING #-} |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
80 replace-loop : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → (value : A) → bt A → List (bt A) → (exit : bt A → t) → t |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
81 replace-loop {_} {_} {A} {t} key value tree st exit = replace-loop1 key value tree st where |
| 604 | 82 replace-loop1 : (key : ℕ) → (value : A) → bt A → List (bt A) → t |
| 83 replace-loop1 key value tree st = replace key value tree st replace-loop1 exit | |
|
586
0ddfa505d612
isolate search function problem, and add hoareBinaryTree.agda.
ryokka
parents:
diff
changeset
|
84 |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
85 insertTree : {n m : Level} {A : Set n} {t : Set m} → (tree : bt A) → (key : ℕ) → (value : A) → (next : bt A → t ) → t |
| 662 | 86 insertTree tree key value exit = find-loop key tree ( tree ∷ [] ) $ λ t st → replaceNode key value t $ λ t1 → replace-loop key value t1 st exit |
| 587 | 87 |
| 604 | 88 insertTest1 = insertTree leaf 1 1 (λ x → x ) |
| 611 | 89 insertTest2 = insertTree insertTest1 2 1 (λ x → x ) |
| 587 | 90 |
| 605 | 91 open import Data.Unit hiding ( _≟_ ; _≤?_ ; _≤_) |
| 92 | |
| 620 | 93 data treeInvariant {n : Level} {A : Set n} : (tree : bt A) → Set n where |
| 94 t-leaf : treeInvariant leaf | |
| 632 | 95 t-single : (key : ℕ) → (value : A) → treeInvariant (node key value leaf leaf) |
| 96 t-right : {key key₁ : ℕ} → {value value₁ : A} → {t₁ t₂ : bt A} → (key < key₁) → treeInvariant (node key₁ value₁ t₁ t₂) | |
| 97 → treeInvariant (node key value leaf (node key₁ value₁ t₁ t₂)) | |
| 98 t-left : {key key₁ : ℕ} → {value value₁ : A} → {t₁ t₂ : bt A} → (key₁ < key) → treeInvariant (node key value t₁ t₂) | |
| 99 → treeInvariant (node key₁ value₁ (node key value t₁ t₂) leaf ) | |
| 620 | 100 t-node : {key key₁ key₂ : ℕ} → {value value₁ value₂ : A} → {t₁ t₂ t₃ t₄ : bt A} → (key < key₁) → (key₁ < key₂) |
| 101 → treeInvariant (node key value t₁ t₂) | |
| 102 → treeInvariant (node key₂ value₂ t₃ t₄) | |
| 103 → treeInvariant (node key₁ value₁ (node key value t₁ t₂) (node key₂ value₂ t₃ t₄)) | |
| 605 | 104 |
| 662 | 105 -- |
| 106 -- stack always contains original top at end | |
| 107 -- | |
| 108 data stackInvariant {n : Level} {A : Set n} (key : ℕ) : (top orig : bt A) → (stack : List (bt A)) → Set n where | |
| 109 s-single : {tree0 : bt A} → stackInvariant key tree0 tree0 (tree0 ∷ []) | |
| 653 | 110 s-right : {tree tree0 tree₁ : bt A} → {key₁ : ℕ } → {v1 : A } → {st : List (bt A)} |
| 662 | 111 → key₁ < key → stackInvariant key (node key₁ v1 tree₁ tree) tree0 st → stackInvariant key tree tree0 (tree ∷ st) |
| 653 | 112 s-left : {tree₁ tree0 tree : bt A} → {key₁ : ℕ } → {v1 : A } → {st : List (bt A)} |
| 662 | 113 → key < key₁ → stackInvariant key (node key₁ v1 tree₁ tree) tree0 st → stackInvariant key tree₁ tree0 (tree₁ ∷ st) |
| 639 | 114 |
| 115 data replacedTree {n : Level} {A : Set n} (key : ℕ) (value : A) : (tree tree1 : bt A ) → Set n where | |
| 116 r-leaf : replacedTree key value leaf (node key value leaf leaf) | |
| 117 r-node : {value₁ : A} → {t t₁ : bt A} → replacedTree key value (node key value₁ t t₁) (node key value t t₁) | |
| 118 r-right : {k : ℕ } {v1 : A} → {t t1 t2 : bt A} | |
| 650 | 119 → k < key → replacedTree key value t1 t2 → replacedTree key value (node k v1 t t1) (node k v1 t t2) |
| 639 | 120 r-left : {k : ℕ } {v1 : A} → {t t1 t2 : bt A} |
| 650 | 121 → k > key → replacedTree key value t1 t2 → replacedTree key value (node k v1 t1 t) (node k v1 t2 t) |
| 639 | 122 |
| 662 | 123 replFromStack : {n : Level} {A : Set n} {key : ℕ} {top orig : bt A} → {stack : List (bt A)} → stackInvariant key top orig stack → bt A |
| 661 | 124 replFromStack (s-single {tree} ) = tree |
| 125 replFromStack (s-right {tree} x st) = tree | |
| 126 replFromStack (s-left {tree} x st) = tree | |
| 652 | 127 |
| 632 | 128 add< : { i : ℕ } (j : ℕ ) → i < suc i + j |
| 129 add< {i} j = begin | |
| 130 suc i ≤⟨ m≤m+n (suc i) j ⟩ | |
| 131 suc i + j ∎ where open ≤-Reasoning | |
| 132 | |
| 133 treeTest1 : bt ℕ | |
| 134 treeTest1 = node 1 0 leaf (node 3 1 (node 2 5 (node 4 7 leaf leaf ) leaf) (node 5 5 leaf leaf)) | |
| 135 treeTest2 : bt ℕ | |
| 136 treeTest2 = node 3 1 (node 2 5 (node 4 7 leaf leaf ) leaf) (node 5 5 leaf leaf) | |
| 137 | |
| 138 treeInvariantTest1 : treeInvariant treeTest1 | |
| 139 treeInvariantTest1 = t-right (m≤m+n _ 1) (t-node (add< 0) (add< 1) (t-left (add< 1) (t-single 4 7)) (t-single 5 5) ) | |
| 605 | 140 |
| 639 | 141 stack-top : {n : Level} {A : Set n} (stack : List (bt A)) → Maybe (bt A) |
| 142 stack-top [] = nothing | |
| 143 stack-top (x ∷ s) = just x | |
| 606 | 144 |
| 639 | 145 stack-last : {n : Level} {A : Set n} (stack : List (bt A)) → Maybe (bt A) |
| 146 stack-last [] = nothing | |
| 147 stack-last (x ∷ []) = just x | |
| 148 stack-last (x ∷ s) = stack-last s | |
| 632 | 149 |
| 662 | 150 stackInvariantTest1 : stackInvariant 4 treeTest2 treeTest1 ( treeTest2 ∷ treeTest1 ∷ [] ) |
| 151 stackInvariantTest1 = s-right (add< 2) s-single | |
| 152 | |
| 666 | 153 si-property0 : {n : Level} {A : Set n} {key : ℕ} {tree tree0 : bt A} → {stack : List (bt A)} → stackInvariant key tree tree0 stack → ¬ ( stack ≡ [] ) |
| 154 si-property0 s-single () | |
| 155 si-property0 (s-right x si) () | |
| 156 si-property0 (s-left x si) () | |
| 665 | 157 |
| 666 | 158 si-property1 : {n : Level} {A : Set n} {key : ℕ} {tree tree0 tree1 : bt A} → {stack : List (bt A)} → stackInvariant key tree tree0 (tree1 ∷ stack) |
| 159 → tree1 ≡ tree | |
| 160 si-property1 s-single = refl | |
| 161 si-property1 (s-right _ si) = refl | |
| 162 si-property1 (s-left _ si) = refl | |
| 662 | 163 |
|
663
cf5095488bbd
stack contains original tree at end always
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
662
diff
changeset
|
164 si-property-last : {n : Level} {A : Set n} (key : ℕ) (tree tree0 : bt A) → (stack : List (bt A)) → stackInvariant key tree tree0 stack |
| 662 | 165 → stack-last stack ≡ just tree0 |
|
663
cf5095488bbd
stack contains original tree at end always
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
662
diff
changeset
|
166 si-property-last key t t0 (t ∷ []) s-single = refl |
| 666 | 167 si-property-last key t t0 (.t ∷ x ∷ st) (s-right _ si ) with si-property1 si |
|
663
cf5095488bbd
stack contains original tree at end always
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
662
diff
changeset
|
168 ... | refl = si-property-last key x t0 (x ∷ st) si |
| 666 | 169 si-property-last key t t0 (.t ∷ x ∷ st) (s-left _ si ) with si-property1 si |
|
663
cf5095488bbd
stack contains original tree at end always
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
662
diff
changeset
|
170 ... | refl = si-property-last key x t0 (x ∷ st) si |
| 656 | 171 |
| 642 | 172 ti-right : {n : Level} {A : Set n} {tree₁ repl : bt A} → {key₁ : ℕ} → {v1 : A} → treeInvariant (node key₁ v1 tree₁ repl) → treeInvariant repl |
| 173 ti-right {_} {_} {.leaf} {_} {key₁} {v1} (t-single .key₁ .v1) = t-leaf | |
| 174 ti-right {_} {_} {.leaf} {_} {key₁} {v1} (t-right x ti) = ti | |
| 175 ti-right {_} {_} {.(node _ _ _ _)} {_} {key₁} {v1} (t-left x ti) = t-leaf | |
| 176 ti-right {_} {_} {.(node _ _ _ _)} {_} {key₁} {v1} (t-node x x₁ ti ti₁) = ti₁ | |
| 177 | |
| 178 ti-left : {n : Level} {A : Set n} {tree₁ repl : bt A} → {key₁ : ℕ} → {v1 : A} → treeInvariant (node key₁ v1 repl tree₁ ) → treeInvariant repl | |
| 179 ti-left {_} {_} {.leaf} {_} {key₁} {v1} (t-single .key₁ .v1) = t-leaf | |
| 180 ti-left {_} {_} {_} {_} {key₁} {v1} (t-right x ti) = t-leaf | |
| 181 ti-left {_} {_} {_} {_} {key₁} {v1} (t-left x ti) = ti | |
| 182 ti-left {_} {_} {.(node _ _ _ _)} {_} {key₁} {v1} (t-node x x₁ ti ti₁) = ti | |
| 183 | |
| 662 | 184 stackTreeInvariant : {n : Level} {A : Set n} (key : ℕ) (sub tree : bt A) → (stack : List (bt A)) |
| 185 → treeInvariant tree → stackInvariant key sub tree stack → treeInvariant sub | |
| 186 stackTreeInvariant {_} {A} key sub tree (sub ∷ []) ti s-single = ti | |
| 187 stackTreeInvariant {_} {A} key sub tree (sub ∷ st) ti (s-right _ si ) = ti-right (si1 si) where | |
| 188 si1 : {tree₁ : bt A} → {key₁ : ℕ} → {v1 : A} → stackInvariant key (node key₁ v1 tree₁ sub ) tree st → treeInvariant (node key₁ v1 tree₁ sub ) | |
| 189 si1 {tree₁ } {key₁ } {v1 } si = stackTreeInvariant key (node key₁ v1 tree₁ sub ) tree st ti si | |
| 190 stackTreeInvariant {_} {A} key sub tree (sub ∷ st) ti (s-left _ si ) = ti-left ( si2 si) where | |
| 191 si2 : {tree₁ : bt A} → {key₁ : ℕ} → {v1 : A} → stackInvariant key (node key₁ v1 sub tree₁ ) tree st → treeInvariant (node key₁ v1 sub tree₁ ) | |
| 192 si2 {tree₁ } {key₁ } {v1 } si = stackTreeInvariant key (node key₁ v1 sub tree₁ ) tree st ti si | |
| 193 | |
| 639 | 194 rt-property1 : {n : Level} {A : Set n} (key : ℕ) (value : A) (tree tree1 : bt A ) → replacedTree key value tree tree1 → ¬ ( tree1 ≡ leaf ) |
| 195 rt-property1 {n} {A} key value .leaf .(node key value leaf leaf) r-leaf () | |
| 196 rt-property1 {n} {A} key value .(node key _ _ _) .(node key value _ _) r-node () | |
| 197 rt-property1 {n} {A} key value .(node _ _ _ _) .(node _ _ _ _) (r-right x rt) () | |
| 198 rt-property1 {n} {A} key value .(node _ _ _ _) .(node _ _ _ _) (r-left x rt) () | |
| 199 | |
| 632 | 200 depth-1< : {i j : ℕ} → suc i ≤ suc (i Data.Nat.⊔ j ) |
| 201 depth-1< {i} {j} = s≤s (m≤m⊔n _ j) | |
| 202 | |
| 203 depth-2< : {i j : ℕ} → suc i ≤ suc (j Data.Nat.⊔ i ) | |
| 650 | 204 depth-2< {i} {j} = s≤s (m≤n⊔m j i) |
| 611 | 205 |
| 649 | 206 depth-3< : {i : ℕ } → suc i ≤ suc (suc i) |
| 207 depth-3< {zero} = s≤s ( z≤n ) | |
| 208 depth-3< {suc i} = s≤s (depth-3< {i} ) | |
| 209 | |
| 210 | |
| 634 | 211 treeLeftDown : {n : Level} {A : Set n} {k : ℕ} {v1 : A} → (tree tree₁ : bt A ) |
| 212 → treeInvariant (node k v1 tree tree₁) | |
| 213 → treeInvariant tree | |
| 214 treeLeftDown {n} {A} {_} {v1} leaf leaf (t-single k1 v1) = t-leaf | |
| 215 treeLeftDown {n} {A} {_} {v1} .leaf .(node _ _ _ _) (t-right x ti) = t-leaf | |
| 216 treeLeftDown {n} {A} {_} {v1} .(node _ _ _ _) .leaf (t-left x ti) = ti | |
| 217 treeLeftDown {n} {A} {_} {v1} .(node _ _ _ _) .(node _ _ _ _) (t-node x x₁ ti ti₁) = ti | |
| 218 | |
| 219 treeRightDown : {n : Level} {A : Set n} {k : ℕ} {v1 : A} → (tree tree₁ : bt A ) | |
| 220 → treeInvariant (node k v1 tree tree₁) | |
| 221 → treeInvariant tree₁ | |
| 222 treeRightDown {n} {A} {_} {v1} .leaf .leaf (t-single _ .v1) = t-leaf | |
| 223 treeRightDown {n} {A} {_} {v1} .leaf .(node _ _ _ _) (t-right x ti) = ti | |
| 224 treeRightDown {n} {A} {_} {v1} .(node _ _ _ _) .leaf (t-left x ti) = t-leaf | |
| 225 treeRightDown {n} {A} {_} {v1} .(node _ _ _ _) .(node _ _ _ _) (t-node x x₁ ti ti₁) = ti₁ | |
| 226 | |
| 664 | 227 nat-≤> : { x y : ℕ } → x ≤ y → y < x → ⊥ |
| 228 nat-≤> (s≤s x<y) (s≤s y<x) = nat-≤> x<y y<x | |
| 229 nat-<> : { x y : ℕ } → x < y → y < x → ⊥ | |
| 230 nat-<> (s≤s x<y) (s≤s y<x) = nat-<> x<y y<x | |
| 633 | 231 |
| 232 open _∧_ | |
| 233 | |
| 615 | 234 findP : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → (tree tree0 : bt A ) → (stack : List (bt A)) |
| 662 | 235 → treeInvariant tree ∧ stackInvariant key tree tree0 stack |
| 236 → (next : (tree1 tree0 : bt A) → (stack : List (bt A)) → treeInvariant tree1 ∧ stackInvariant key tree1 tree0 stack → bt-depth tree1 < bt-depth tree → t ) | |
| 237 → (exit : (tree1 tree0 : bt A) → (stack : List (bt A)) → treeInvariant tree1 ∧ stackInvariant key tree1 tree0 stack | |
| 638 | 238 → (tree1 ≡ leaf ) ∨ ( node-key tree1 ≡ just key ) → t ) → t |
| 239 findP key leaf tree0 st Pre _ exit = exit leaf tree0 st Pre (case1 refl) | |
| 632 | 240 findP key (node key₁ v1 tree tree₁) tree0 st Pre next exit with <-cmp key key₁ |
| 638 | 241 findP key n tree0 st Pre _ exit | tri≈ ¬a refl ¬c = exit n tree0 st Pre (case2 refl) |
| 664 | 242 findP {n} {_} {A} key (node key₁ v1 tree tree₁) tree0 st Pre next _ | tri< a ¬b ¬c = next tree tree0 (tree ∷ st) |
|
663
cf5095488bbd
stack contains original tree at end always
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
662
diff
changeset
|
243 ⟪ treeLeftDown tree tree₁ (proj1 Pre) , findP1 a st (proj2 Pre) ⟫ depth-1< where |
|
cf5095488bbd
stack contains original tree at end always
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
662
diff
changeset
|
244 findP1 : key < key₁ → (st : List (bt A)) → stackInvariant key (node key₁ v1 tree tree₁) tree0 st → stackInvariant key tree tree0 (tree ∷ st) |
| 664 | 245 findP1 a (x ∷ st) si = s-left a si |
| 662 | 246 findP key n@(node key₁ v1 tree tree₁) tree0 st Pre next _ | tri> ¬a ¬b c = next tree₁ tree0 (tree₁ ∷ st) ⟪ treeRightDown tree tree₁ (proj1 Pre) , s-right c (proj2 Pre) ⟫ depth-2< |
| 606 | 247 |
| 638 | 248 replaceTree1 : {n : Level} {A : Set n} {t t₁ : bt A } → ( k : ℕ ) → (v1 value : A ) → treeInvariant (node k v1 t t₁) → treeInvariant (node k value t t₁) |
| 249 replaceTree1 k v1 value (t-single .k .v1) = t-single k value | |
| 250 replaceTree1 k v1 value (t-right x t) = t-right x t | |
| 251 replaceTree1 k v1 value (t-left x t) = t-left x t | |
| 252 replaceTree1 k v1 value (t-node x x₁ t t₁) = t-node x x₁ t t₁ | |
| 253 | |
| 649 | 254 open import Relation.Binary.Definitions |
| 255 | |
| 256 lemma3 : {i j : ℕ} → 0 ≡ i → j < i → ⊥ | |
| 257 lemma3 refl () | |
| 258 lemma5 : {i j : ℕ} → i < 1 → j < i → ⊥ | |
| 259 lemma5 (s≤s z≤n) () | |
| 260 | |
| 638 | 261 replaceNodeP : {n m : Level} {A : Set n} {t : Set m} → (key : ℕ) → (value : A) → (tree : bt A) |
| 262 → (tree ≡ leaf ) ∨ ( node-key tree ≡ just key ) | |
| 263 → (treeInvariant tree ) → ((tree1 : bt A) → treeInvariant tree1 → replacedTree key value tree tree1 → t) → t | |
| 264 replaceNodeP k v1 leaf C P next = next (node k v1 leaf leaf) (t-single k v1 ) r-leaf | |
| 265 replaceNodeP k v1 (node .k value t t₁) (case2 refl) P next = next (node k v1 t t₁) (replaceTree1 k value v1 P) r-node | |
| 606 | 266 |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
267 replaceP : {n m : Level} {A : Set n} {t : Set m} |
|
651
7b9d35f7c033
fix stack top and replaced tree
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
650
diff
changeset
|
268 → (key : ℕ) → (value : A) → {tree0 tree tree-st : bt A} ( repl : bt A) |
| 662 | 269 → (stack : List (bt A)) → treeInvariant tree0 ∧ stackInvariant key tree-st tree0 stack ∧ replacedTree key value tree repl |
|
651
7b9d35f7c033
fix stack top and replaced tree
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
650
diff
changeset
|
270 → (next : ℕ → A → {tree0 tree1 tree-st : bt A } (repl : bt A) → (stack1 : List (bt A)) |
| 662 | 271 → treeInvariant tree0 ∧ stackInvariant key tree-st tree0 stack1 ∧ replacedTree key value tree1 repl → length stack1 < length stack → t) |
| 613 | 272 → (exit : (tree1 repl : bt A) → treeInvariant tree1 ∧ replacedTree key value tree1 repl → t) → t |
| 666 | 273 replaceP key value {tree0} {tree} {tree-st} repl [] Pre next exit = ⊥-elim ( si-property0 (proj1 (proj2 Pre)) refl ) -- can't happen |
| 665 | 274 replaceP key value {tree0} {tree} {tree-st} repl (leaf ∷ []) Pre next exit = |
| 275 exit tree0 (node key value leaf leaf) ⟪ proj1 Pre , subst (λ k → replacedTree key value k _ ) {!!} r-leaf ⟫ | |
| 664 | 276 replaceP key value {tree0} {tree} {tree-st} repl (node key₁ value₁ left right ∷ []) Pre next exit with <-cmp key key₁ |
| 666 | 277 ... | tri< a ¬b ¬c = exit tree0 (node key₁ value₁ tree right ) ⟪ proj1 Pre , subst (λ k → replacedTree key value k _ ) {!!} (r-left a (proj2 (proj2 Pre)) ) ⟫ |
| 278 ... | tri≈ ¬a refl ¬c = exit tree0 (node key₁ value left right ) ⟪ proj1 Pre , subst (λ k → replacedTree key value k _ ) {!!} r-node ⟫ | |
| 665 | 279 ... | tri> ¬a ¬b c = exit tree0 (node key₁ value₁ left tree ) ⟪ proj1 Pre , subst (λ k → replacedTree key value k _ ) {!!} {!!} ⟫ |
| 666 | 280 replaceP {n} {_} {A} key value {tree0} {tree} {tree-st} repl (leaf ∷ st@(_ ∷ _)) Pre next exit = |
| 281 next key value {tree0} (node key value leaf leaf) st | |
| 282 ⟪ proj1 Pre , ⟪ repl01 (sym (si-property1 (proj1 (proj2 Pre)))) (proj1 (proj2 Pre)) | |
| 283 , subst (λ k → replacedTree key value k (node key value leaf leaf) ) (si-property1 (proj1 (proj2 Pre))) r-leaf ⟫ ⟫ ≤-refl where | |
| 284 repl01 : {x : bt A} → { xs : List (bt A)} → tree-st ≡ leaf → stackInvariant key tree-st tree0 (leaf ∷ x ∷ xs) → stackInvariant key x tree0 (x ∷ xs) | |
| 285 repl01 {x} {xs} refl (s-right lt si) = subst (λ k → stackInvariant key k tree0 (x ∷ xs) ) (sym (si-property1 si)) si | |
| 286 repl01 {x} {xs} refl (s-left lt si) = subst (λ k → stackInvariant key k tree0 (x ∷ xs) ) (sym (si-property1 si)) si | |
| 664 | 287 replaceP key value {tree0} {tree} {tree-st} repl (node key₁ value₁ left right ∷ st@(_ ∷ _)) Pre next exit with <-cmp key key₁ |
| 665 | 288 ... | tri< a ¬b ¬c = next key value {tree0} (node key₁ value₁ tree right ) st ⟪ proj1 Pre , ⟪ {!!} , subst (λ k → replacedTree key value k _ ) {!!} {!!} ⟫ ⟫ ≤-refl |
| 289 ... | tri≈ ¬a b ¬c = next key value {tree0} (node key₁ value left right ) st ⟪ proj1 Pre , ⟪ {!!} , subst (λ k → replacedTree key value k _ ) {!!} {!!} ⟫ ⟫ ≤-refl | |
| 290 ... | tri> ¬a ¬b c = next key value {tree0} (node key₁ value₁ left tree ) st ⟪ proj1 Pre , ⟪ {!!} , subst (λ k → replacedTree key value k _ ) {!!} {!!} ⟫ ⟫ ≤-refl | |
| 644 | 291 |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
292 TerminatingLoopS : {l m : Level} {t : Set l} (Index : Set m ) → {Invraiant : Index → Set m } → ( reduce : Index → ℕ) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
293 → (r : Index) → (p : Invraiant r) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
294 → (loop : (r : Index) → Invraiant r → (next : (r1 : Index) → Invraiant r1 → reduce r1 < reduce r → t ) → t) → t |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
295 TerminatingLoopS {_} {_} {t} Index {Invraiant} reduce r p loop with <-cmp 0 (reduce r) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
296 ... | tri≈ ¬a b ¬c = loop r p (λ r1 p1 lt → ⊥-elim (lemma3 b lt) ) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
297 ... | tri< a ¬b ¬c = loop r p (λ r1 p1 lt1 → TerminatingLoop1 (reduce r) r r1 (≤-step lt1) p1 lt1 ) where |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
298 TerminatingLoop1 : (j : ℕ) → (r r1 : Index) → reduce r1 < suc j → Invraiant r1 → reduce r1 < reduce r → t |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
299 TerminatingLoop1 zero r r1 n≤j p1 lt = loop r1 p1 (λ r2 p1 lt1 → ⊥-elim (lemma5 n≤j lt1)) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
300 TerminatingLoop1 (suc j) r r1 n≤j p1 lt with <-cmp (reduce r1) (suc j) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
301 ... | tri< a ¬b ¬c = TerminatingLoop1 j r r1 a p1 lt |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
302 ... | tri≈ ¬a b ¬c = loop r1 p1 (λ r2 p2 lt1 → TerminatingLoop1 j r1 r2 (subst (λ k → reduce r2 < k ) b lt1 ) p2 lt1 ) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
303 ... | tri> ¬a ¬b c = ⊥-elim ( nat-≤> c n≤j ) |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
304 |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
305 open _∧_ |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
306 |
| 615 | 307 RTtoTI0 : {n : Level} {A : Set n} → (tree repl : bt A) → (key : ℕ) → (value : A) → treeInvariant tree |
| 308 → replacedTree key value tree repl → treeInvariant repl | |
| 309 RTtoTI0 = {!!} | |
| 310 | |
| 311 RTtoTI1 : {n : Level} {A : Set n} → (tree repl : bt A) → (key : ℕ) → (value : A) → treeInvariant repl | |
| 312 → replacedTree key value tree repl → treeInvariant tree | |
| 313 RTtoTI1 = {!!} | |
| 614 | 314 |
| 611 | 315 insertTreeP : {n m : Level} {A : Set n} {t : Set m} → (tree : bt A) → (key : ℕ) → (value : A) → treeInvariant tree |
| 613 | 316 → (exit : (tree repl : bt A) → treeInvariant tree ∧ replacedTree key value tree repl → t ) → t |
| 610 | 317 insertTreeP {n} {m} {A} {t} tree key value P exit = |
| 662 | 318 TerminatingLoopS (bt A ∧ List (bt A) ) {λ p → treeInvariant (proj1 p) ∧ stackInvariant key (proj1 p) tree (proj2 p) } (λ p → bt-depth (proj1 p)) ⟪ tree , [] ⟫ ⟪ P , {!!} ⟫ |
| 615 | 319 $ λ p P loop → findP key (proj1 p) tree (proj2 p) {!!} (λ t _ s P1 lt → loop ⟪ t , s ⟫ {!!} lt ) |
| 638 | 320 $ λ t _ s P C → replaceNodeP key value t C (proj1 P) |
| 614 | 321 $ λ t1 P1 R → TerminatingLoopS (List (bt A) ∧ (bt A ∧ bt A )) |
| 662 | 322 {λ p → treeInvariant (proj1 (proj2 p)) ∧ stackInvariant key (proj1 (proj2 p)) tree (proj1 p) ∧ replacedTree key value (proj1 (proj2 p)) (proj2 (proj2 p)) } |
| 639 | 323 (λ p → length (proj1 p)) ⟪ s , ⟪ t , t1 ⟫ ⟫ ⟪ proj1 P , ⟪ {!!} , R ⟫ ⟫ |
| 644 | 324 $ λ p P1 loop → replaceP key value (proj2 (proj2 p)) (proj1 p) {!!} |
| 325 (λ key value repl1 stack P2 lt → loop ⟪ stack , ⟪ {!!} , repl1 ⟫ ⟫ {!!} lt ) exit | |
| 614 | 326 |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
327 top-value : {n : Level} {A : Set n} → (tree : bt A) → Maybe A |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
328 top-value leaf = nothing |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
329 top-value (node key value tree tree₁) = just value |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
330 |
| 612 | 331 insertTreeSpec0 : {n : Level} {A : Set n} → (tree : bt A) → (value : A) → top-value tree ≡ just value → ⊤ |
|
609
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
332 insertTreeSpec0 _ _ _ = tt |
|
79418701a283
add test and speciication
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
606
diff
changeset
|
333 |
| 627 | 334 record findPR {n : Level} {A : Set n} (key : ℕ) (tree : bt A ) (stack : List (bt A)) (C : bt A → List (bt A) → Set n) : Set n where |
| 618 | 335 field |
| 619 | 336 tree0 : bt A |
| 622 | 337 ti : treeInvariant tree0 |
| 662 | 338 si : stackInvariant key tree tree0 stack |
| 631 | 339 ci : C tree stack -- data continuation |
| 618 | 340 |
| 616 | 341 findPP : {n m : Level} {A : Set n} {t : Set m} |
| 342 → (key : ℕ) → (tree : bt A ) → (stack : List (bt A)) | |
| 627 | 343 → (Pre : findPR key tree stack (λ t s → Lift n ⊤)) |
| 344 → (next : (tree1 : bt A) → (stack1 : List (bt A)) → findPR key tree1 stack1 (λ t s → Lift n ⊤) → bt-depth tree1 < bt-depth tree → t ) | |
| 345 → (exit : (tree1 : bt A) → (stack1 : List (bt A)) → ( tree1 ≡ leaf ) ∨ ( node-key tree1 ≡ just key) → findPR key tree1 stack1 (λ t s → Lift n ⊤) → t) → t | |
| 625 | 346 findPP key leaf st Pre next exit = exit leaf st (case1 refl) Pre |
| 632 | 347 findPP key (node key₁ v1 tree tree₁) st Pre next exit with <-cmp key key₁ |
| 625 | 348 findPP key n st P next exit | tri≈ ¬a b ¬c = exit n st (case2 {!!}) P |
| 632 | 349 findPP {_} {_} {A} key n@(node key₁ v1 tree tree₁) st Pre next exit | tri< a ¬b ¬c = |
| 624 | 350 next tree (n ∷ st) (record {ti = findPR.ti Pre ; si = findPP2 st (findPR.si Pre) ; ci = lift tt} ) findPP1 where |
| 621 | 351 tree0 = findPR.tree0 Pre |
| 662 | 352 findPP2 : (st : List (bt A)) → stackInvariant key {!!} tree0 st → stackInvariant key {!!} tree0 (node key₁ v1 tree tree₁ ∷ st) |
| 623 | 353 findPP2 = {!!} |
| 618 | 354 findPP1 : suc ( bt-depth tree ) ≤ suc (bt-depth tree Data.Nat.⊔ bt-depth tree₁) |
| 634 | 355 findPP1 = depth-1< |
| 632 | 356 findPP key n@(node key₁ v1 tree tree₁) st Pre next exit | tri> ¬a ¬b c = next tree₁ (n ∷ st) {!!} findPP2 where -- Cond n st → Cond tree₁ (n ∷ st) |
| 618 | 357 findPP2 : suc (bt-depth tree₁) ≤ suc (bt-depth tree Data.Nat.⊔ bt-depth tree₁) |
| 634 | 358 findPP2 = depth-2< |
| 616 | 359 |
| 618 | 360 insertTreePP : {n m : Level} {A : Set n} {t : Set m} → (tree : bt A) → (key : ℕ) → (value : A) → treeInvariant tree |
| 361 → (exit : (tree repl : bt A) → treeInvariant tree ∧ replacedTree key value tree repl → t ) → t | |
| 624 | 362 insertTreePP {n} {m} {A} {t} tree key value P exit = |
| 627 | 363 TerminatingLoopS (bt A ∧ List (bt A) ) {λ p → findPR key (proj1 p) (proj2 p) (λ t s → Lift n ⊤) } (λ p → bt-depth (proj1 p)) ⟪ tree , [] ⟫ {!!} |
| 630 | 364 $ λ p P loop → findPP key (proj1 p) (proj2 p) P (λ t s P1 lt → loop ⟪ t , s ⟫ P1 lt ) |
| 638 | 365 $ λ t s _ P → replaceNodeP key value t {!!} {!!} |
| 618 | 366 $ λ t1 P1 R → TerminatingLoopS (List (bt A) ∧ (bt A ∧ bt A )) |
| 662 | 367 {λ p → treeInvariant (proj1 (proj2 p)) ∧ stackInvariant key (proj1 (proj2 p)) tree (proj1 p) ∧ replacedTree key value (proj1 (proj2 p)) (proj2 (proj2 p)) } |
| 639 | 368 (λ p → length (proj1 p)) ⟪ s , ⟪ t , t1 ⟫ ⟫ ⟪ {!!} , ⟪ {!!} , R ⟫ ⟫ |
| 644 | 369 $ λ p P1 loop → replaceP key value (proj2 (proj2 p)) (proj1 p) {!!} |
| 370 (λ key value repl1 stack P2 lt → loop ⟪ stack , ⟪ {!!} , repl1 ⟫ ⟫ {!!} lt ) exit | |
| 618 | 371 |
| 629 | 372 record findPC {n : Level} {A : Set n} (key1 : ℕ) (value1 : A) (tree : bt A ) (stack : List (bt A)) : Set n where |
| 616 | 373 field |
| 374 tree1 : bt A | |
| 617 | 375 ci : replacedTree key1 value1 tree tree1 |
| 616 | 376 |
| 624 | 377 findPPC : {n m : Level} {A : Set n} {t : Set m} |
| 628 | 378 → (key : ℕ) → (value : A) → (tree : bt A ) → (stack : List (bt A)) |
| 629 | 379 → (Pre : findPR key tree stack (findPC key value)) |
| 380 → (next : (tree1 : bt A) → (stack1 : List (bt A)) → findPR key tree1 stack1 (findPC key value) → bt-depth tree1 < bt-depth tree → t ) | |
| 381 → (exit : (tree1 : bt A) → (stack1 : List (bt A)) → ( tree1 ≡ leaf ) ∨ ( node-key tree1 ≡ just key) → findPR key tree1 stack1 (findPC key value) → t) → t | |
| 382 findPPC key value leaf st Pre next exit = exit leaf st (case1 refl) Pre | |
| 632 | 383 findPPC key value (node key₁ v1 tree tree₁) st Pre next exit with <-cmp key key₁ |
| 629 | 384 findPPC key value n st P next exit | tri≈ ¬a b ¬c = exit n st (case2 {!!}) P |
| 632 | 385 findPPC {_} {_} {A} key value n@(node key₁ v1 tree tree₁) st Pre next exit | tri< a ¬b ¬c = |
| 629 | 386 next tree (n ∷ st) (record {ti = findPR.ti Pre ; si = {!!} ; ci = {!!} } ) {!!} |
| 387 findPPC key value n st P next exit | tri> ¬a ¬b c = {!!} | |
| 624 | 388 |
| 618 | 389 containsTree : {n m : Level} {A : Set n} {t : Set m} → (tree tree1 : bt A) → (key : ℕ) → (value : A) → treeInvariant tree1 → replacedTree key value tree1 tree → ⊤ |
| 615 | 390 containsTree {n} {m} {A} {t} tree tree1 key value P RT = |
| 617 | 391 TerminatingLoopS (bt A ∧ List (bt A) ) |
| 634 | 392 {λ p → findPR key (proj1 p) (proj2 p) (findPC key value ) } (λ p → bt-depth (proj1 p)) -- findPR key tree1 [] (findPC key value) |
| 393 ⟪ tree1 , [] ⟫ record { tree0 = tree ; ti = {!!} ; si = {!!} ; ci = record { tree1 = tree ; ci = RT } } | |
| 630 | 394 $ λ p P loop → findPPC key value (proj1 p) (proj2 p) P (λ t s P1 lt → loop ⟪ t , s ⟫ P1 lt ) |
| 629 | 395 $ λ t1 s1 found? P2 → insertTreeSpec0 t1 value (lemma6 t1 s1 found? P2) where |
| 396 lemma6 : (t1 : bt A) (s1 : List (bt A)) (found? : (t1 ≡ leaf) ∨ (node-key t1 ≡ just key)) (P2 : findPR key t1 s1 (findPC key value)) → top-value t1 ≡ just value | |
| 397 lemma6 t1 s1 found? P2 = lemma7 t1 s1 (findPR.tree0 P2) ( findPC.tree1 (findPR.ci P2)) ( findPC.ci (findPR.ci P2)) (findPR.si P2) found? where | |
| 398 lemma7 : (t1 : bt A) ( s1 : List (bt A) ) (tree0 tree1 : bt A) → | |
| 662 | 399 replacedTree key value t1 tree1 → stackInvariant key t1 tree0 s1 → ( t1 ≡ leaf ) ∨ ( node-key t1 ≡ just key) → top-value t1 ≡ just value |
| 629 | 400 lemma7 = {!!} |
| 615 | 401 |