1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
// Package tests serves a list of tests for tailscale.com/cmd/viewer.
package tests
import (
"fmt"
"net/netip"
"golang.org/x/exp/constraints"
"tailscale.com/types/ptr"
"tailscale.com/types/views"
)
//go:generate go run tailscale.com/cmd/viewer --type=StructWithPtrs,StructWithoutPtrs,Map,StructWithSlices,OnlyGetClone,StructWithEmbedded,GenericIntStruct,GenericNoPtrsStruct,GenericCloneableStruct,StructWithContainers,StructWithTypeAliasFields,GenericTypeAliasStruct --clone-only-type=OnlyGetClone
type StructWithoutPtrs struct {
Int int
Pfx netip.Prefix
}
type Map struct {
Int map[string]int
SliceInt map[string][]int
StructPtrWithPtr map[string]*StructWithPtrs
StructPtrWithoutPtr map[string]*StructWithoutPtrs
StructWithoutPtr map[string]StructWithoutPtrs
SlicesWithPtrs map[string][]*StructWithPtrs
SlicesWithoutPtrs map[string][]*StructWithoutPtrs
StructWithoutPtrKey map[StructWithoutPtrs]int `json:"-"`
StructWithPtr map[string]StructWithPtrs
// Unsupported views.
SliceIntPtr map[string][]*int
PointerKey map[*string]int `json:"-"`
StructWithPtrKey map[StructWithPtrs]int `json:"-"`
}
type StructWithNoView struct {
Value int
}
type StructWithPtrs struct {
Value *StructWithoutPtrs
Int *int
NoView *StructWithNoView
NoCloneValue *StructWithoutPtrs `codegen:"noclone"`
}
func (v *StructWithPtrs) String() string { return fmt.Sprintf("%v", v.Int) }
func (v *StructWithPtrs) Equal(v2 *StructWithPtrs) bool {
return v.Value == v2.Value
}
type StructWithSlices struct {
Values []StructWithoutPtrs
ValuePointers []*StructWithoutPtrs
StructPointers []*StructWithPtrs
Slice []string
Prefixes []netip.Prefix
Data []byte
// Unsupported views.
Structs []StructWithPtrs
Ints []*int
}
type OnlyGetClone struct {
SinViewerPorFavor bool
}
type StructWithEmbedded struct {
A *StructWithPtrs
StructWithSlices
}
type GenericIntStruct[T constraints.Integer] struct {
Value T
Pointer *T
Slice []T
Map map[string]T
// Unsupported views.
PtrSlice []*T
PtrKeyMap map[*T]string `json:"-"`
PtrValueMap map[string]*T
SliceMap map[string][]T
}
type BasicType interface {
~bool | constraints.Integer | constraints.Float | constraints.Complex | ~string
}
type GenericNoPtrsStruct[T StructWithoutPtrs | netip.Prefix | BasicType] struct {
Value T
Pointer *T
Slice []T
Map map[string]T
// Unsupported views.
PtrSlice []*T
PtrKeyMap map[*T]string `json:"-"`
PtrValueMap map[string]*T
SliceMap map[string][]T
}
type GenericCloneableStruct[T views.ViewCloner[T, V], V views.StructView[T]] struct {
Value T
Slice []T
Map map[string]T
// Unsupported views.
Pointer *T
PtrSlice []*T
PtrKeyMap map[*T]string `json:"-"`
PtrValueMap map[string]*T
SliceMap map[string][]T
}
// Container is a pre-defined container type, such as a collection, an optional
// value or a generic wrapper.
type Container[T any] struct {
Item T
}
func (c *Container[T]) Clone() *Container[T] {
if c == nil {
return nil
}
if cloner, ok := any(c.Item).(views.Cloner[T]); ok {
return &Container[T]{cloner.Clone()}
}
if !views.ContainsPointers[T]() {
return ptr.To(*c)
}
panic(fmt.Errorf("%T contains pointers, but is not cloneable", c.Item))
}
// ContainerView is a pre-defined read-only view of a Container[T].
type ContainerView[T views.ViewCloner[T, V], V views.StructView[T]] struct {
// ж is the underlying mutable value, named with a hard-to-type
// character that looks pointy like a pointer.
// It is named distinctively to make you think of how dangerous it is to escape
// to callers. You must not let callers be able to mutate it.
ж *Container[T]
}
func (cv ContainerView[T, V]) Item() V {
return cv.ж.Item.View()
}
func ContainerViewOf[T views.ViewCloner[T, V], V views.StructView[T]](c *Container[T]) ContainerView[T, V] {
return ContainerView[T, V]{c}
}
// MapContainer is a predefined map-like container type.
// Unlike [Container], it has two type parameters, where the value
// is the second parameter.
type MapContainer[K comparable, V views.Cloner[V]] struct {
Items map[K]V
}
func (c *MapContainer[K, V]) Clone() *MapContainer[K, V] {
if c == nil {
return nil
}
var m map[K]V
if c.Items != nil {
m = make(map[K]V, len(c.Items))
for i := range m {
m[i] = c.Items[i].Clone()
}
}
return &MapContainer[K, V]{m}
}
// MapContainerView is a pre-defined read-only view of a [MapContainer][K, T].
type MapContainerView[K comparable, T views.ViewCloner[T, V], V views.StructView[T]] struct {
// ж is the underlying mutable value, named with a hard-to-type
// character that looks pointy like a pointer.
// It is named distinctively to make you think of how dangerous it is to escape
// to callers. You must not let callers be able to mutate it.
ж *MapContainer[K, T]
}
func (cv MapContainerView[K, T, V]) Items() views.MapFn[K, T, V] {
return views.MapFnOf(cv.ж.Items, func(t T) V { return t.View() })
}
func MapContainerViewOf[K comparable, T views.ViewCloner[T, V], V views.StructView[T]](c *MapContainer[K, T]) MapContainerView[K, T, V] {
return MapContainerView[K, T, V]{c}
}
type GenericBasicStruct[T BasicType] struct {
Value T
}
type StructWithContainers struct {
IntContainer Container[int]
CloneableContainer Container[*StructWithPtrs]
BasicGenericContainer Container[GenericBasicStruct[int]]
CloneableGenericContainer Container[*GenericNoPtrsStruct[int]]
CloneableMap MapContainer[int, *StructWithPtrs]
CloneableGenericMap MapContainer[int, *GenericNoPtrsStruct[int]]
}
type (
StructWithPtrsAlias = StructWithPtrs
StructWithoutPtrsAlias = StructWithoutPtrs
StructWithPtrsAliasView = StructWithPtrsView
StructWithoutPtrsAliasView = StructWithoutPtrsView
)
type StructWithTypeAliasFields struct {
WithPtr StructWithPtrsAlias
WithoutPtr StructWithoutPtrsAlias
WithPtrByPtr *StructWithPtrsAlias
WithoutPtrByPtr *StructWithoutPtrsAlias
SliceWithPtrs []*StructWithPtrsAlias
SliceWithoutPtrs []*StructWithoutPtrsAlias
MapWithPtrs map[string]*StructWithPtrsAlias
MapWithoutPtrs map[string]*StructWithoutPtrsAlias
MapOfSlicesWithPtrs map[string][]*StructWithPtrsAlias
MapOfSlicesWithoutPtrs map[string][]*StructWithoutPtrsAlias
}
type integer = constraints.Integer
type GenericTypeAliasStruct[T integer, T2 views.ViewCloner[T2, V2], V2 views.StructView[T2]] struct {
NonCloneable T
Cloneable T2
}
|
