// Copyright 2018 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package istio.policy.v1beta1;

option go_package="istio.io/api/policy/v1beta1";

// ValueType describes the types that values in the Istio system can take. These
// are used to describe the type of Attributes at run time, describe the type of
// the result of evaluating an expression, and to describe the runtime type of
// fields of other descriptors.
enum ValueType {
    // Invalid, default value.
    VALUE_TYPE_UNSPECIFIED = 0;

    // An undiscriminated variable-length string.
    STRING = 1;

    // An undiscriminated 64-bit signed integer.
    INT64 = 2;

    // An undiscriminated 64-bit floating-point value.
    DOUBLE = 3;

    // An undiscriminated boolean value.
    BOOL = 4;

    // A point in time.
    TIMESTAMP = 5;

    // An IP address.
    IP_ADDRESS = 6;

    // An email address.
    EMAIL_ADDRESS = 7;

    // A URI.
    URI = 8;

    // A DNS name.
    DNS_NAME = 9;

    // A span between two points in time.
    DURATION = 10;

    // A map string -> string, typically used by headers.
    STRING_MAP = 11;
}
