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// Copyright (c) Tailscale Inc & contributors
// 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,StructWithMapOfViews --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
}
type StructWithMapOfViews struct {
MapOfViews map[string]StructWithoutPtrsView
}
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