--- /dev/null
+// Copyright 2018 Google LLC.
+//
+// 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 google.api.expr.v1alpha1;
+
+import "google/protobuf/any.proto";
+import "google/protobuf/struct.proto";
+
+option cc_enable_arenas = true;
+option go_package = "google.golang.org/genproto/googleapis/api/expr/v1alpha1;expr";
+option java_multiple_files = true;
+option java_outer_classname = "ValueProto";
+option java_package = "com.google.api.expr.v1alpha1";
+
+// Contains representations for CEL runtime values.
+
+// Represents a CEL value.
+//
+// This is similar to `google.protobuf.Value`, but can represent CEL's full
+// range of values.
+message Value {
+ // Required. The valid kinds of values.
+ oneof kind {
+ // Null value.
+ google.protobuf.NullValue null_value = 1;
+
+ // Boolean value.
+ bool bool_value = 2;
+
+ // Signed integer value.
+ int64 int64_value = 3;
+
+ // Unsigned integer value.
+ uint64 uint64_value = 4;
+
+ // Floating point value.
+ double double_value = 5;
+
+ // UTF-8 string value.
+ string string_value = 6;
+
+ // Byte string value.
+ bytes bytes_value = 7;
+
+ // An enum value.
+ EnumValue enum_value = 9;
+
+ // The proto message backing an object value.
+ google.protobuf.Any object_value = 10;
+
+ // Map value.
+ MapValue map_value = 11;
+
+ // List value.
+ ListValue list_value = 12;
+
+ // Type value.
+ string type_value = 15;
+ }
+}
+
+// An enum value.
+message EnumValue {
+ // The fully qualified name of the enum type.
+ string type = 1;
+
+ // The value of the enum.
+ int32 value = 2;
+}
+
+// A list.
+//
+// Wrapped in a message so 'not set' and empty can be differentiated, which is
+// required for use in a 'oneof'.
+message ListValue {
+ // The ordered values in the list.
+ repeated Value values = 1;
+}
+
+// A map.
+//
+// Wrapped in a message so 'not set' and empty can be differentiated, which is
+// required for use in a 'oneof'.
+message MapValue {
+ // An entry in the map.
+ message Entry {
+ // The key.
+ //
+ // Must be unique with in the map.
+ // Currently only boolean, int, uint, and string values can be keys.
+ Value key = 1;
+
+ // The value.
+ Value value = 2;
+ }
+
+ // The set of map entries.
+ //
+ // CEL has fewer restrictions on keys, so a protobuf map represenation
+ // cannot be used.
+ repeated Entry entries = 1;
+}