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- using System;
- using System.Collections.Generic;
- using System.Diagnostics.CodeAnalysis;
- using JetBrains.Annotations;
-
- namespace UnityEngine.Rendering
- {
- /// <summary>
- /// A set of extension methods for collections
- /// </summary>
- public static class RemoveRangeExtensions
- {
- /// <summary>
- /// Tries to remove a range of elements from the list in the given range.
- /// </summary>
- /// <param name="list">The list to remove the range</param>
- /// <param name="index">The zero-based starting index of the range of elements to remove</param>
- /// <param name="count">The number of elements to remove.</param>
- /// <param name="error">The exception raised by the implementation</param>
- /// <typeparam name="TValue">The value type stored on the list</typeparam>
- /// <returns>True if succeed, false otherwise</returns>
- [CollectionAccess(CollectionAccessType.ModifyExistingContent)]
- [MustUseReturnValue]
- public static bool TryRemoveElementsInRange<TValue>([DisallowNull] this IList<TValue> list, int index, int count, [NotNullWhen(false)] out Exception error)
- {
- try
- {
- if (list is List<TValue> genericList)
- {
- genericList.RemoveRange(index, count);
- }
- else
- {
- #if DEVELOPMENT_BUILD || UNITY_EDITOR
- if (index < 0) throw new ArgumentOutOfRangeException(nameof(index));
- if (count < 0) throw new ArgumentOutOfRangeException(nameof(count));
- if (list.Count - index < count) throw new ArgumentException("index and count do not denote a valid range of elements in the list");
- #endif
-
- for (var i = count; i > 0; --i)
- list.RemoveAt(index);
- }
- }
- catch (Exception e)
- {
- error = e;
- return false;
- }
-
- error = null;
- return true;
- }
- }
- }
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