packages/sql-catalog/src/Core/Evaluation/Presence.php

1<?php
2
3declare(strict_types=1);
4
5namespace SqlCatalog\Core\Evaluation;
6
7/**
8 * Whether a variable exists, independently of its value domain.
9 *
10 * @visibility root
11 */
12enum Presence: string
13{
14    case Present = 'present';
15    case Absent = 'absent';
16    case Maybe = 'maybe';
17}
18