<?php
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: google/firestore/v1beta1/query.proto

namespace Google\Cloud\Firestore\V1beta1;

/**
 * A unary operator.
 *
 * Protobuf enum <code>Google\Firestore\V1beta1\StructuredQuery\UnaryFilter\Operator</code>
 */
class StructuredQuery_UnaryFilter_Operator
{
    /**
     * Unspecified. This value must not be used.
     *
     * Generated from protobuf enum <code>OPERATOR_UNSPECIFIED = 0;</code>
     */
    const OPERATOR_UNSPECIFIED = 0;
    /**
     * Test if a field is equal to NaN.
     *
     * Generated from protobuf enum <code>IS_NAN = 2;</code>
     */
    const IS_NAN = 2;
    /**
     * Test if an exprestion evaluates to Null.
     *
     * Generated from protobuf enum <code>IS_NULL = 3;</code>
     */
    const IS_NULL = 3;
}

