Initial QSfera import

Server/vendor/github.com/open-policy-agent/opa/v1/util/maps.go

@@ -0,0 +1,34 @@
+package util
+
+import (
+	"cmp"
+	"slices"
+)
+
+// Keys returns a slice of keys from any map.
+func Keys[M ~map[K]V, K comparable, V any](m M) []K {
+	r := make([]K, 0, len(m))
+	for k := range m {
+		r = append(r, k)
+	}
+	return r
+}
+
+// KeysSorted returns a slice of keys from any map, sorted in ascending order.
+func KeysSorted[M ~map[K]V, K cmp.Ordered, V any](m M) []K {
+	r := make([]K, 0, len(m))
+	for k := range m {
+		r = append(r, k)
+	}
+	slices.Sort(r)
+	return r
+}
+
+// Values returns a slice of values from any map. Copied from golang.org/x/exp/maps.
+func Values[M ~map[K]V, K comparable, V any](m M) []V {
+	r := make([]V, 0, len(m))
+	for _, v := range m {
+		r = append(r, v)
+	}
+	return r
+}