stride/sources/core/Stride.Core.Design/StringSpanExtensions.cs

// Copyright (c) .NET Foundation and Contributors (https://dotnetfoundation.org/ & https://stride3d.net) and Silicon Studio Corp. (https://www.siliconstudio.co.jp)
// Distributed under the MIT license. See the LICENSE.md file in the project root for more information.

namespace Stride.Core;

public static class StringSpanExtensions
{
    /// <summary>
    /// Gets the substring with the specified span. If the span is invalid, return null.
    /// </summary>
    /// <param name="str">The string.</param>
    /// <param name="span">The span.</param>
    /// <returns>A substring with the specified span or null if span is empty.</returns>
    public static string? Substring(this string str, StringSpan span)
    {
        return span.IsValid ? str.Substring(span.Start, span.Length) : null;
    }
}