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See Roslyn-Detected C# Warning Classes for more information.
The Range-based indexer on string values produces a copy of requested portion of the string. This copy is usually unnecessary when it is implicitly used as a ReadOnlySpan or ReadOnlyMemory value. Use the AsSpan method to avoid the unnecessary copy.
This check corresponds to Roslyn rule CA1831. For full rule details, see the Microsoft website: CA1831.
| Class Name | Use AsSpan or AsMemory instead of Range-based indexers when appropriate (C#) |
|---|---|
| Significance | reliability |
| Mnemonic | ROSLYN.PERFORMANCE.CA1831 |
| Categories | None |
| Availability | Available for C# only. |
| Enabling | Checks for this warning class are enabled by
default. To disable them, add the following WARNING_FILTER rule to the
project configuration file.
WARNING_FILTER += discard class="Use AsSpan or AsMemory instead of Range-based indexers when appropriate (C#)" |
The following configuration file parameters affect checks for this warning class.
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