Update dependencies

vendor/tailscale.com/util/set/set.go

@@ -0,0 +1,94 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package set contains set types.
+package set
+
+import (
+	"encoding/json"
+	"maps"
+)
+
+// Set is a set of T.
+type Set[T comparable] map[T]struct{}
+
+// SetOf returns a new set constructed from the elements in slice.
+func SetOf[T comparable](slice []T) Set[T] {
+	return Of(slice...)
+}
+
+// Of returns a new set constructed from the elements in slice.
+func Of[T comparable](slice ...T) Set[T] {
+	s := make(Set[T])
+	s.AddSlice(slice)
+	return s
+}
+
+// Clone returns a new set cloned from the elements in s.
+func (s Set[T]) Clone() Set[T] {
+	return maps.Clone(s)
+}
+
+// Add adds e to s.
+func (s Set[T]) Add(e T) { s[e] = struct{}{} }
+
+// AddSlice adds each element of es to s.
+func (s Set[T]) AddSlice(es []T) {
+	for _, e := range es {
+		s.Add(e)
+	}
+}
+
+// AddSet adds each element of es to s.
+func (s Set[T]) AddSet(es Set[T]) {
+	for e := range es {
+		s.Add(e)
+	}
+}
+
+// Make lazily initializes the map pointed to by s to be non-nil.
+func (s *Set[T]) Make() {
+	if *s == nil {
+		*s = make(Set[T])
+	}
+}
+
+// Slice returns the elements of the set as a slice. The elements will not be
+// in any particular order.
+func (s Set[T]) Slice() []T {
+	es := make([]T, 0, s.Len())
+	for k := range s {
+		es = append(es, k)
+	}
+	return es
+}
+
+// Delete removes e from the set.
+func (s Set[T]) Delete(e T) { delete(s, e) }
+
+// Contains reports whether s contains e.
+func (s Set[T]) Contains(e T) bool {
+	_, ok := s[e]
+	return ok
+}
+
+// Len reports the number of items in s.
+func (s Set[T]) Len() int { return len(s) }
+
+// Equal reports whether s is equal to other.
+func (s Set[T]) Equal(other Set[T]) bool {
+	return maps.Equal(s, other)
+}
+
+func (s Set[T]) MarshalJSON() ([]byte, error) {
+	return json.Marshal(s.Slice())
+}
+
+func (s *Set[T]) UnmarshalJSON(buf []byte) error {
+	var ss []T
+	if err := json.Unmarshal(buf, &ss); err != nil {
+		return err
+	}
+	*s = SetOf(ss)
+	return nil
+}