update

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/open-policy-agent/opa/topdown/array.go

@@ -0,0 +1,75 @@
+// Copyright 2018 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/ast"
+	"github.com/open-policy-agent/opa/topdown/builtins"
+)
+
+func builtinArrayConcat(a, b ast.Value) (ast.Value, error) {
+	arrA, err := builtins.ArrayOperand(a, 1)
+	if err != nil {
+		return nil, err
+	}
+
+	arrB, err := builtins.ArrayOperand(b, 2)
+	if err != nil {
+		return nil, err
+	}
+
+	arrC := make(ast.Array, 0, len(arrA)+len(arrB))
+
+	for _, elemA := range arrA {
+		arrC = append(arrC, elemA)
+	}
+
+	for _, elemB := range arrB {
+		arrC = append(arrC, elemB)
+	}
+
+	return arrC, nil
+}
+
+func builtinArraySlice(a, i, j ast.Value) (ast.Value, error) {
+	arr, err := builtins.ArrayOperand(a, 1)
+	if err != nil {
+		return nil, err
+	}
+
+	startIndex, err := builtins.IntOperand(i, 2)
+	if err != nil {
+		return nil, err
+	}
+
+	stopIndex, err := builtins.IntOperand(j, 3)
+	if err != nil {
+		return nil, err
+	}
+
+	// Return empty array if bounds cannot be clamped sensibly.
+	if (startIndex >= stopIndex) || (startIndex <= 0 && stopIndex <= 0) {
+		return arr[0:0], nil
+	}
+
+	// Clamp bounds to avoid out-of-range errors.
+	if startIndex < 0 {
+		startIndex = 0
+	}
+
+	if stopIndex > len(arr) {
+		stopIndex = len(arr)
+	}
+
+	arrb := arr[startIndex:stopIndex]
+
+	return arrb, nil
+
+}
+
+func init() {
+	RegisterFunctionalBuiltin2(ast.ArrayConcat.Name, builtinArrayConcat)
+	RegisterFunctionalBuiltin3(ast.ArraySlice.Name, builtinArraySlice)
+}