48 lines
1.7 KiB
C#
48 lines
1.7 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using JetBrains.Annotations;
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namespace UnityEngine.Rendering
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{
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/// <summary>
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/// A set of extension methods for collections
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/// </summary>
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public static class SwapCollectionExtensions
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{
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/// <summary>
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/// Tries to remove a range of elements from the list in the given range.
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/// </summary>
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/// <param name="list">The list to remove the range</param>
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/// <param name="from">From index</param>
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/// <param name="to">To index</param>
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/// <param name="error">The exception raised by the implementation</param>
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/// <typeparam name="TValue">The value type stored on the list</typeparam>
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/// <returns>True if succeed, false otherwise</returns>
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[CollectionAccess(CollectionAccessType.ModifyExistingContent)]
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[MustUseReturnValue]
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public static bool TrySwap<TValue>([DisallowNull] this IList<TValue> list, int from, int to, [NotNullWhen(false)] out Exception error)
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{
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error = null;
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if (list == null)
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{
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error = new ArgumentNullException(nameof(list));
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}
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else
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{
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if (from < 0 || from >= list.Count)
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error = new ArgumentOutOfRangeException(nameof(from));
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if (to < 0 || to >= list.Count)
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error = new ArgumentOutOfRangeException(nameof(to));
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}
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if (error != null)
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return false;
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// https://tearth.dev/posts/performance-of-the-different-ways-to-swap-two-values/
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(list[to], list[from]) = (list[from], list[to]);
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return true;
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}
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}
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}
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