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qubit_argument/argument/constraint/
index_role.rs

1// =============================================================================
2//    Copyright (c) 2025 - 2026 Haixing Hu.
3//
4//    SPDX-License-Identifier: Apache-2.0
5//
6//    Licensed under the Apache License, Version 2.0.
7// =============================================================================
8//! Index roles used by indexed argument validation.
9
10/// The role of an index in an indexed argument operation.
11#[derive(Debug, Clone, Copy, PartialEq, Eq)]
12pub enum IndexRole {
13    /// Identifies an existing element and therefore excludes the collection
14    /// end.
15    Element,
16    /// Identifies an insertion or boundary position, including the collection
17    /// end.
18    Position,
19}