Initial QSfera import

Server/vendor/github.com/open-policy-agent/opa/ast/index.go

@@ -0,0 +1,20 @@
+// Copyright 2017 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+package ast
+
+import (
+	v1 "github.com/open-policy-agent/opa/v1/ast"
+)
+
+// RuleIndex defines the interface for rule indices.
+type RuleIndex v1.RuleIndex
+
+// IndexResult contains the result of an index lookup.
+type IndexResult = v1.IndexResult
+
+// NewIndexResult returns a new IndexResult object.
+func NewIndexResult(kind RuleKind) *IndexResult {
+	return v1.NewIndexResult(kind)
+}