Initial QSfera import

Server/vendor/github.com/open-policy-agent/opa/v1/topdown/binary.go

@@ -0,0 +1,50 @@
+// 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 topdown
+
+import (
+	"github.com/open-policy-agent/opa/v1/ast"
+	"github.com/open-policy-agent/opa/v1/topdown/builtins"
+)
+
+func builtinBinaryAnd(_ BuiltinContext, operands []*ast.Term, iter func(*ast.Term) error) error {
+
+	s1, err := builtins.SetOperand(operands[0].Value, 1)
+	if err != nil {
+		return err
+	}
+
+	s2, err := builtins.SetOperand(operands[1].Value, 2)
+	if err != nil {
+		return err
+	}
+
+	i := s1.Intersect(s2)
+	if i.Len() == 0 {
+		return iter(ast.InternedEmptySet)
+	}
+
+	return iter(ast.NewTerm(i))
+}
+
+func builtinBinaryOr(_ BuiltinContext, operands []*ast.Term, iter func(*ast.Term) error) error {
+
+	s1, err := builtins.SetOperand(operands[0].Value, 1)
+	if err != nil {
+		return err
+	}
+
+	s2, err := builtins.SetOperand(operands[1].Value, 2)
+	if err != nil {
+		return err
+	}
+
+	return iter(ast.NewTerm(s1.Union(s2)))
+}
+
+func init() {
+	RegisterBuiltinFunc(ast.And.Name, builtinBinaryAnd)
+	RegisterBuiltinFunc(ast.Or.Name, builtinBinaryOr)
+}