Initial QSfera import

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

@@ -0,0 +1,49 @@
+// Copyright 2024 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"
+)
+
+var RegoV1CompatibleRef = v1.RegoV1CompatibleRef
+
+// RegoVersion defines the Rego syntax requirements for a module.
+type RegoVersion = v1.RegoVersion
+
+const DefaultRegoVersion = RegoV0
+
+const (
+	RegoUndefined = v1.RegoUndefined
+	// RegoV0 is the default, original Rego syntax.
+	RegoV0 = v1.RegoV0
+	// RegoV0CompatV1 requires modules to comply with both the RegoV0 and RegoV1 syntax (as when 'rego.v1' is imported in a module).
+	// Shortly, RegoV1 compatibility is required, but 'rego.v1' or 'future.keywords' must also be imported.
+	RegoV0CompatV1 = v1.RegoV0CompatV1
+	// RegoV1 is the Rego syntax enforced by OPA 1.0; e.g.:
+	// future.keywords part of default keyword set, and don't require imports;
+	// 'if' and 'contains' required in rule heads;
+	// (some) strict checks on by default.
+	RegoV1 = v1.RegoV1
+)
+
+func RegoVersionFromInt(i int) RegoVersion {
+	return v1.RegoVersionFromInt(i)
+}
+
+// Parser is used to parse Rego statements.
+type Parser = v1.Parser
+
+// ParserOptions defines the options for parsing Rego statements.
+type ParserOptions = v1.ParserOptions
+
+// NewParser creates and initializes a Parser.
+func NewParser() *Parser {
+	return v1.NewParser().WithRegoVersion(DefaultRegoVersion)
+}
+
+func IsFutureKeyword(s string) bool {
+	return v1.IsFutureKeywordForRegoVersion(s, RegoV0)
+}