forked from
tangled.org/core
Monorepo for Tangled
sets: init
move sets into tree
Signed-off-by: oppiliappan <me@oppi.li>
author
oppiliappan
date
(Dec 14, 2025, 5:06 AM UTC)
commit
80a70ca4
80a70ca4ac26f1cfdec94cdccc5c7cb0ac671815
parent
d2ecb7c2
d2ecb7c261c6156ff3e8013b8e7497600b3fec20
change-id
mxmrunun
mxmrununzwrtonvrskzqkrpqyywuluvs
+652
-6
+1
-1
appview/notify/db/db.go
+1
-1
appview/notify/db/db.go
-1
go.mod
-1
go.mod
···
215
215
gopkg.in/warnings.v0 v0.1.2 // indirect
216
216
gotest.tools/v3 v3.5.2 // indirect
217
217
lukechampine.com/blake3 v1.4.1 // indirect
218
-
tangled.org/oppi.li/sets v0.0.0-20251210075238-d0656dd747b1 // indirect
219
218
)
220
219
221
220
replace github.com/sergi/go-diff => github.com/sergi/go-diff v1.1.0
-4
go.sum
-4
go.sum
···
726
726
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
727
727
lukechampine.com/blake3 v1.4.1 h1:I3Smz7gso8w4/TunLKec6K2fn+kyKtDxr/xcQEN84Wg=
728
728
lukechampine.com/blake3 v1.4.1/go.mod h1:QFosUxmjB8mnrWFSNwKmvxHpfY72bmD2tQ0kBMM3kwo=
729
-
tangled.org/oppi.li/sets v0.0.0-20251122035104-aea095ac29d9 h1:LD0RqSiHzo3HuiU0gTc0+0DE2z0PRye1x6D1SsbBYU0=
730
-
tangled.org/oppi.li/sets v0.0.0-20251122035104-aea095ac29d9/go.mod h1:C09MVBFQm4osZYBfo7V9kwGw8T5zYK2bYmpGbrG7Lec=
731
-
tangled.org/oppi.li/sets v0.0.0-20251210075238-d0656dd747b1 h1:6SeBKpo7JJvVwuj/6ocnr8Xh2NI4SX2cDpTNqhBIY68=
732
-
tangled.org/oppi.li/sets v0.0.0-20251210075238-d0656dd747b1/go.mod h1:p1Xz6tCV3Kxfqe4o6B4MzOr40gTrG3hwJqiZS9EX9LM=
733
729
tangled.sh/oppi.li/go-gitdiff v0.8.2 h1:pASJJNWaFn6EmEIUNNjHZQ3stRu6BqTO2YyjKvTcxIc=
734
730
tangled.sh/oppi.li/go-gitdiff v0.8.2/go.mod h1:WWAk1Mc6EgWarCrPFO+xeYlujPu98VuLW3Tu+B/85AE=
+31
sets/gen.go
+31
sets/gen.go
···
1
+
package sets
2
+
3
+
import (
4
+
"math/rand"
5
+
"reflect"
6
+
"testing/quick"
7
+
)
8
+
9
+
func (_ Set[T]) Generate(rand *rand.Rand, size int) reflect.Value {
10
+
s := New[T]()
11
+
12
+
var zero T
13
+
itemType := reflect.TypeOf(zero)
14
+
15
+
for {
16
+
if s.Len() >= size {
17
+
break
18
+
}
19
+
20
+
item, ok := quick.Value(itemType, rand)
21
+
if !ok {
22
+
continue
23
+
}
24
+
25
+
if val, ok := item.Interface().(T); ok {
26
+
s.Insert(val)
27
+
}
28
+
}
29
+
30
+
return reflect.ValueOf(s)
31
+
}
+35
sets/readme.txt
+35
sets/readme.txt
···
1
+
sets
2
+
----
3
+
set datastructure for go with generics and iterators. the
4
+
api is supposed to mimic rust's std::collections::HashSet api.
5
+
6
+
s1 := sets.Collect(slices.Values([]int{1, 2, 3, 4}))
7
+
s2 := sets.Collect(slices.Values([]int{1, 2, 3, 4, 5, 6}))
8
+
9
+
union := sets.Collect(s1.Union(s2))
10
+
intersect := sets.Collect(s1.Intersection(s2))
11
+
diff := sets.Collect(s1.Difference(s2))
12
+
symdiff := sets.Collect(s1.SymmetricDifference(s2))
13
+
14
+
s1.Len() // 4
15
+
s1.Contains(1) // true
16
+
s1.IsEmpty() // false
17
+
s1.IsSubset(s2) // true
18
+
s1.IsSuperset(s2) // false
19
+
s1.IsDisjoint(s2) // false
20
+
21
+
if exists := s1.Insert(1); exists {
22
+
// already existed in set
23
+
}
24
+
25
+
if existed := s1.Remove(1); existed {
26
+
// existed in set, now removed
27
+
}
28
+
29
+
30
+
testing
31
+
-------
32
+
includes property-based tests using the wonderful
33
+
testing/quick module!
34
+
35
+
go test -v
+174
sets/set.go
+174
sets/set.go
···
1
+
package sets
2
+
3
+
import (
4
+
"iter"
5
+
"maps"
6
+
)
7
+
8
+
type Set[T comparable] struct {
9
+
data map[T]struct{}
10
+
}
11
+
12
+
func New[T comparable]() Set[T] {
13
+
return Set[T]{
14
+
data: make(map[T]struct{}),
15
+
}
16
+
}
17
+
18
+
func (s *Set[T]) Insert(item T) bool {
19
+
_, exists := s.data[item]
20
+
s.data[item] = struct{}{}
21
+
return !exists
22
+
}
23
+
24
+
func Singleton[T comparable](item T) Set[T] {
25
+
n := New[T]()
26
+
_ = n.Insert(item)
27
+
return n
28
+
}
29
+
30
+
func (s *Set[T]) Remove(item T) bool {
31
+
_, exists := s.data[item]
32
+
if exists {
33
+
delete(s.data, item)
34
+
}
35
+
return exists
36
+
}
37
+
38
+
func (s Set[T]) Contains(item T) bool {
39
+
_, exists := s.data[item]
40
+
return exists
41
+
}
42
+
43
+
func (s Set[T]) Len() int {
44
+
return len(s.data)
45
+
}
46
+
47
+
func (s Set[T]) IsEmpty() bool {
48
+
return len(s.data) == 0
49
+
}
50
+
51
+
func (s *Set[T]) Clear() {
52
+
s.data = make(map[T]struct{})
53
+
}
54
+
55
+
func (s Set[T]) All() iter.Seq[T] {
56
+
return func(yield func(T) bool) {
57
+
for item := range s.data {
58
+
if !yield(item) {
59
+
return
60
+
}
61
+
}
62
+
}
63
+
}
64
+
65
+
func (s Set[T]) Clone() Set[T] {
66
+
return Set[T]{
67
+
data: maps.Clone(s.data),
68
+
}
69
+
}
70
+
71
+
func (s Set[T]) Union(other Set[T]) iter.Seq[T] {
72
+
if s.Len() >= other.Len() {
73
+
return chain(s.All(), other.Difference(s))
74
+
} else {
75
+
return chain(other.All(), s.Difference(other))
76
+
}
77
+
}
78
+
79
+
func chain[T any](seqs ...iter.Seq[T]) iter.Seq[T] {
80
+
return func(yield func(T) bool) {
81
+
for _, seq := range seqs {
82
+
for item := range seq {
83
+
if !yield(item) {
84
+
return
85
+
}
86
+
}
87
+
}
88
+
}
89
+
}
90
+
91
+
func (s Set[T]) Intersection(other Set[T]) iter.Seq[T] {
92
+
return func(yield func(T) bool) {
93
+
for item := range s.data {
94
+
if other.Contains(item) {
95
+
if !yield(item) {
96
+
return
97
+
}
98
+
}
99
+
}
100
+
}
101
+
}
102
+
103
+
func (s Set[T]) Difference(other Set[T]) iter.Seq[T] {
104
+
return func(yield func(T) bool) {
105
+
for item := range s.data {
106
+
if !other.Contains(item) {
107
+
if !yield(item) {
108
+
return
109
+
}
110
+
}
111
+
}
112
+
}
113
+
}
114
+
115
+
func (s Set[T]) SymmetricDifference(other Set[T]) iter.Seq[T] {
116
+
return func(yield func(T) bool) {
117
+
for item := range s.data {
118
+
if !other.Contains(item) {
119
+
if !yield(item) {
120
+
return
121
+
}
122
+
}
123
+
}
124
+
for item := range other.data {
125
+
if !s.Contains(item) {
126
+
if !yield(item) {
127
+
return
128
+
}
129
+
}
130
+
}
131
+
}
132
+
}
133
+
134
+
func (s Set[T]) IsSubset(other Set[T]) bool {
135
+
for item := range s.data {
136
+
if !other.Contains(item) {
137
+
return false
138
+
}
139
+
}
140
+
return true
141
+
}
142
+
143
+
func (s Set[T]) IsSuperset(other Set[T]) bool {
144
+
return other.IsSubset(s)
145
+
}
146
+
147
+
func (s Set[T]) IsDisjoint(other Set[T]) bool {
148
+
for item := range s.data {
149
+
if other.Contains(item) {
150
+
return false
151
+
}
152
+
}
153
+
return true
154
+
}
155
+
156
+
func (s Set[T]) Equal(other Set[T]) bool {
157
+
if s.Len() != other.Len() {
158
+
return false
159
+
}
160
+
for item := range s.data {
161
+
if !other.Contains(item) {
162
+
return false
163
+
}
164
+
}
165
+
return true
166
+
}
167
+
168
+
func Collect[T comparable](seq iter.Seq[T]) Set[T] {
169
+
result := New[T]()
170
+
for item := range seq {
171
+
result.Insert(item)
172
+
}
173
+
return result
174
+
}
+411
sets/set_test.go
+411
sets/set_test.go
···
1
+
package sets
2
+
3
+
import (
4
+
"slices"
5
+
"testing"
6
+
"testing/quick"
7
+
)
8
+
9
+
func TestNew(t *testing.T) {
10
+
s := New[int]()
11
+
if s.Len() != 0 {
12
+
t.Errorf("New set should be empty, got length %d", s.Len())
13
+
}
14
+
if !s.IsEmpty() {
15
+
t.Error("New set should be empty")
16
+
}
17
+
}
18
+
19
+
func TestFromSlice(t *testing.T) {
20
+
s := Collect(slices.Values([]int{1, 2, 3, 2, 1}))
21
+
if s.Len() != 3 {
22
+
t.Errorf("Expected length 3, got %d", s.Len())
23
+
}
24
+
if !s.Contains(1) || !s.Contains(2) || !s.Contains(3) {
25
+
t.Error("Set should contain all unique elements from slice")
26
+
}
27
+
}
28
+
29
+
func TestInsert(t *testing.T) {
30
+
s := New[string]()
31
+
32
+
if !s.Insert("hello") {
33
+
t.Error("First insert should return true")
34
+
}
35
+
if s.Insert("hello") {
36
+
t.Error("Duplicate insert should return false")
37
+
}
38
+
if s.Len() != 1 {
39
+
t.Errorf("Expected length 1, got %d", s.Len())
40
+
}
41
+
}
42
+
43
+
func TestRemove(t *testing.T) {
44
+
s := Collect(slices.Values([]int{1, 2, 3}))
45
+
46
+
if !s.Remove(2) {
47
+
t.Error("Remove existing element should return true")
48
+
}
49
+
if s.Remove(2) {
50
+
t.Error("Remove non-existing element should return false")
51
+
}
52
+
if s.Contains(2) {
53
+
t.Error("Element should be removed")
54
+
}
55
+
if s.Len() != 2 {
56
+
t.Errorf("Expected length 2, got %d", s.Len())
57
+
}
58
+
}
59
+
60
+
func TestContains(t *testing.T) {
61
+
s := Collect(slices.Values([]int{1, 2, 3}))
62
+
63
+
if !s.Contains(1) {
64
+
t.Error("Should contain 1")
65
+
}
66
+
if s.Contains(4) {
67
+
t.Error("Should not contain 4")
68
+
}
69
+
}
70
+
71
+
func TestClear(t *testing.T) {
72
+
s := Collect(slices.Values([]int{1, 2, 3}))
73
+
s.Clear()
74
+
75
+
if !s.IsEmpty() {
76
+
t.Error("Set should be empty after clear")
77
+
}
78
+
if s.Len() != 0 {
79
+
t.Errorf("Expected length 0, got %d", s.Len())
80
+
}
81
+
}
82
+
83
+
func TestIterator(t *testing.T) {
84
+
s := Collect(slices.Values([]int{1, 2, 3}))
85
+
var items []int
86
+
87
+
for item := range s.All() {
88
+
items = append(items, item)
89
+
}
90
+
91
+
slices.Sort(items)
92
+
expected := []int{1, 2, 3}
93
+
if !slices.Equal(items, expected) {
94
+
t.Errorf("Expected %v, got %v", expected, items)
95
+
}
96
+
}
97
+
98
+
func TestClone(t *testing.T) {
99
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
100
+
s2 := s1.Clone()
101
+
102
+
if !s1.Equal(s2) {
103
+
t.Error("Cloned set should be equal to original")
104
+
}
105
+
106
+
s2.Insert(4)
107
+
if s1.Contains(4) {
108
+
t.Error("Modifying clone should not affect original")
109
+
}
110
+
}
111
+
112
+
func TestUnion(t *testing.T) {
113
+
s1 := Collect(slices.Values([]int{1, 2}))
114
+
s2 := Collect(slices.Values([]int{2, 3}))
115
+
116
+
result := Collect(s1.Union(s2))
117
+
expected := Collect(slices.Values([]int{1, 2, 3}))
118
+
119
+
if !result.Equal(expected) {
120
+
t.Errorf("Expected %v, got %v", expected, result)
121
+
}
122
+
}
123
+
124
+
func TestIntersection(t *testing.T) {
125
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
126
+
s2 := Collect(slices.Values([]int{2, 3, 4}))
127
+
128
+
expected := Collect(slices.Values([]int{2, 3}))
129
+
result := Collect(s1.Intersection(s2))
130
+
131
+
if !result.Equal(expected) {
132
+
t.Errorf("Expected %v, got %v", expected, result)
133
+
}
134
+
}
135
+
136
+
func TestDifference(t *testing.T) {
137
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
138
+
s2 := Collect(slices.Values([]int{2, 3, 4}))
139
+
140
+
expected := Collect(slices.Values([]int{1}))
141
+
result := Collect(s1.Difference(s2))
142
+
143
+
if !result.Equal(expected) {
144
+
t.Errorf("Expected %v, got %v", expected, result)
145
+
}
146
+
}
147
+
148
+
func TestSymmetricDifference(t *testing.T) {
149
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
150
+
s2 := Collect(slices.Values([]int{2, 3, 4}))
151
+
152
+
expected := Collect(slices.Values([]int{1, 4}))
153
+
result := Collect(s1.SymmetricDifference(s2))
154
+
155
+
if !result.Equal(expected) {
156
+
t.Errorf("Expected %v, got %v", expected, result)
157
+
}
158
+
}
159
+
160
+
func TestSymmetricDifferenceCommutativeProperty(t *testing.T) {
161
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
162
+
s2 := Collect(slices.Values([]int{2, 3, 4}))
163
+
164
+
result1 := Collect(s1.SymmetricDifference(s2))
165
+
result2 := Collect(s2.SymmetricDifference(s1))
166
+
167
+
if !result1.Equal(result2) {
168
+
t.Errorf("Expected %v, got %v", result1, result2)
169
+
}
170
+
}
171
+
172
+
func TestIsSubset(t *testing.T) {
173
+
s1 := Collect(slices.Values([]int{1, 2}))
174
+
s2 := Collect(slices.Values([]int{1, 2, 3}))
175
+
176
+
if !s1.IsSubset(s2) {
177
+
t.Error("s1 should be subset of s2")
178
+
}
179
+
if s2.IsSubset(s1) {
180
+
t.Error("s2 should not be subset of s1")
181
+
}
182
+
}
183
+
184
+
func TestIsSuperset(t *testing.T) {
185
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
186
+
s2 := Collect(slices.Values([]int{1, 2}))
187
+
188
+
if !s1.IsSuperset(s2) {
189
+
t.Error("s1 should be superset of s2")
190
+
}
191
+
if s2.IsSuperset(s1) {
192
+
t.Error("s2 should not be superset of s1")
193
+
}
194
+
}
195
+
196
+
func TestIsDisjoint(t *testing.T) {
197
+
s1 := Collect(slices.Values([]int{1, 2}))
198
+
s2 := Collect(slices.Values([]int{3, 4}))
199
+
s3 := Collect(slices.Values([]int{2, 3}))
200
+
201
+
if !s1.IsDisjoint(s2) {
202
+
t.Error("s1 and s2 should be disjoint")
203
+
}
204
+
if s1.IsDisjoint(s3) {
205
+
t.Error("s1 and s3 should not be disjoint")
206
+
}
207
+
}
208
+
209
+
func TestEqual(t *testing.T) {
210
+
s1 := Collect(slices.Values([]int{1, 2, 3}))
211
+
s2 := Collect(slices.Values([]int{3, 2, 1}))
212
+
s3 := Collect(slices.Values([]int{1, 2}))
213
+
214
+
if !s1.Equal(s2) {
215
+
t.Error("s1 and s2 should be equal")
216
+
}
217
+
if s1.Equal(s3) {
218
+
t.Error("s1 and s3 should not be equal")
219
+
}
220
+
}
221
+
222
+
func TestCollect(t *testing.T) {
223
+
s1 := Collect(slices.Values([]int{1, 2}))
224
+
s2 := Collect(slices.Values([]int{2, 3}))
225
+
226
+
unionSet := Collect(s1.Union(s2))
227
+
if unionSet.Len() != 3 {
228
+
t.Errorf("Expected union set length 3, got %d", unionSet.Len())
229
+
}
230
+
if !unionSet.Contains(1) || !unionSet.Contains(2) || !unionSet.Contains(3) {
231
+
t.Error("Union set should contain 1, 2, and 3")
232
+
}
233
+
234
+
diffSet := Collect(s1.Difference(s2))
235
+
if diffSet.Len() != 1 {
236
+
t.Errorf("Expected difference set length 1, got %d", diffSet.Len())
237
+
}
238
+
if !diffSet.Contains(1) {
239
+
t.Error("Difference set should contain 1")
240
+
}
241
+
}
242
+
243
+
func TestPropertySingleonLen(t *testing.T) {
244
+
f := func(item int) bool {
245
+
single := Singleton(item)
246
+
return single.Len() == 1
247
+
}
248
+
249
+
if err := quick.Check(f, nil); err != nil {
250
+
t.Error(err)
251
+
}
252
+
}
253
+
254
+
func TestPropertyInsertIdempotent(t *testing.T) {
255
+
f := func(s Set[int], item int) bool {
256
+
clone := s.Clone()
257
+
258
+
clone.Insert(item)
259
+
firstLen := clone.Len()
260
+
261
+
clone.Insert(item)
262
+
secondLen := clone.Len()
263
+
264
+
return firstLen == secondLen
265
+
}
266
+
267
+
if err := quick.Check(f, nil); err != nil {
268
+
t.Error(err)
269
+
}
270
+
}
271
+
272
+
func TestPropertyUnionCommutative(t *testing.T) {
273
+
f := func(s1 Set[int], s2 Set[int]) bool {
274
+
union1 := Collect(s1.Union(s2))
275
+
union2 := Collect(s2.Union(s1))
276
+
return union1.Equal(union2)
277
+
}
278
+
279
+
if err := quick.Check(f, nil); err != nil {
280
+
t.Error(err)
281
+
}
282
+
}
283
+
284
+
func TestPropertyIntersectionCommutative(t *testing.T) {
285
+
f := func(s1 Set[int], s2 Set[int]) bool {
286
+
inter1 := Collect(s1.Intersection(s2))
287
+
inter2 := Collect(s2.Intersection(s1))
288
+
return inter1.Equal(inter2)
289
+
}
290
+
291
+
if err := quick.Check(f, nil); err != nil {
292
+
t.Error(err)
293
+
}
294
+
}
295
+
296
+
func TestPropertyCloneEquals(t *testing.T) {
297
+
f := func(s Set[int]) bool {
298
+
clone := s.Clone()
299
+
return s.Equal(clone)
300
+
}
301
+
302
+
if err := quick.Check(f, nil); err != nil {
303
+
t.Error(err)
304
+
}
305
+
}
306
+
307
+
func TestPropertyIntersectionIsSubset(t *testing.T) {
308
+
f := func(s1 Set[int], s2 Set[int]) bool {
309
+
inter := Collect(s1.Intersection(s2))
310
+
return inter.IsSubset(s1) && inter.IsSubset(s2)
311
+
}
312
+
313
+
if err := quick.Check(f, nil); err != nil {
314
+
t.Error(err)
315
+
}
316
+
}
317
+
318
+
func TestPropertyUnionIsSuperset(t *testing.T) {
319
+
f := func(s1 Set[int], s2 Set[int]) bool {
320
+
union := Collect(s1.Union(s2))
321
+
return union.IsSuperset(s1) && union.IsSuperset(s2)
322
+
}
323
+
324
+
if err := quick.Check(f, nil); err != nil {
325
+
t.Error(err)
326
+
}
327
+
}
328
+
329
+
func TestPropertyDifferenceDisjoint(t *testing.T) {
330
+
f := func(s1 Set[int], s2 Set[int]) bool {
331
+
diff := Collect(s1.Difference(s2))
332
+
return diff.IsDisjoint(s2)
333
+
}
334
+
335
+
if err := quick.Check(f, nil); err != nil {
336
+
t.Error(err)
337
+
}
338
+
}
339
+
340
+
func TestPropertySymmetricDifferenceCommutative(t *testing.T) {
341
+
f := func(s1 Set[int], s2 Set[int]) bool {
342
+
symDiff1 := Collect(s1.SymmetricDifference(s2))
343
+
symDiff2 := Collect(s2.SymmetricDifference(s1))
344
+
return symDiff1.Equal(symDiff2)
345
+
}
346
+
347
+
if err := quick.Check(f, nil); err != nil {
348
+
t.Error(err)
349
+
}
350
+
}
351
+
352
+
func TestPropertyRemoveWorks(t *testing.T) {
353
+
f := func(s Set[int], item int) bool {
354
+
clone := s.Clone()
355
+
clone.Insert(item)
356
+
clone.Remove(item)
357
+
return !clone.Contains(item)
358
+
}
359
+
360
+
if err := quick.Check(f, nil); err != nil {
361
+
t.Error(err)
362
+
}
363
+
}
364
+
365
+
func TestPropertyClearEmpty(t *testing.T) {
366
+
f := func(s Set[int]) bool {
367
+
s.Clear()
368
+
return s.IsEmpty() && s.Len() == 0
369
+
}
370
+
371
+
if err := quick.Check(f, nil); err != nil {
372
+
t.Error(err)
373
+
}
374
+
}
375
+
376
+
func TestPropertyIsSubsetReflexive(t *testing.T) {
377
+
f := func(s Set[int]) bool {
378
+
return s.IsSubset(s)
379
+
}
380
+
381
+
if err := quick.Check(f, nil); err != nil {
382
+
t.Error(err)
383
+
}
384
+
}
385
+
386
+
func TestPropertyDeMorganUnion(t *testing.T) {
387
+
f := func(s1 Set[int], s2 Set[int], universe Set[int]) bool {
388
+
// create a universe that contains both sets
389
+
u := universe.Clone()
390
+
for item := range s1.All() {
391
+
u.Insert(item)
392
+
}
393
+
for item := range s2.All() {
394
+
u.Insert(item)
395
+
}
396
+
397
+
// (A u B)' = A' n B'
398
+
union := Collect(s1.Union(s2))
399
+
complementUnion := Collect(u.Difference(union))
400
+
401
+
complementS1 := Collect(u.Difference(s1))
402
+
complementS2 := Collect(u.Difference(s2))
403
+
intersectionComplements := Collect(complementS1.Intersection(complementS2))
404
+
405
+
return complementUnion.Equal(intersectionComplements)
406
+
}
407
+
408
+
if err := quick.Check(f, nil); err != nil {
409
+
t.Error(err)
410
+
}
411
+
}