System.Runtime work planned for .NET 8

[dakersnar]

This is a work in progress as we develop our .NET 8 plans. This list is expected to change throughout the release cycle according to ongoing planning and discussions, with possible additions and subtractions to the scope.

Summary

The System.Runtime area represents our primitive types and other fundamental APIs. During .NET 8, we will tentatively consider the following tasks.

Planned for .NET 8

Enhancements / New APIs

• [API Proposal]: OperatingSystem.IsWasi() #78389
• [API Proposal]: MemoryExtensions.AsSpan(this string? text, Range range) #77955
• [API Proposal]: ArgumentException helper methods #77749
• [API Proposal]: string.GetHashCodeNonRandomized #77679
• [API Proposal]: Create array from array type #76478
• [API Proposal]: Alternative span/memory/string splitting API #76186
• [API Proposal]: MemoryExtensions.Count / number of occurrences of a value in a span #59466
• [API Proposal]: Add method TryFormat for Enum #57881
• CommandLineToArgvW has different behavior than SegmentCommandLine #77644
• [API Proposal]: Modify Float/Double Equals and CompareTo to reflect -0.0 and +0.0 difference and ordering #73583
• [API Proposal]: Add API to check if process had administrator privileges #68770
• Add "Create" method to EqualityComparer<> class #24460

Analyzers

• [Analyzer] Lift arrays of literals to static fields #78398
• Warn about ArrayPool.Return without clearArray specified when T is not a value type or has references #71698
• [Analyzer proposal]: Simplify calls to string.Substring and Memory/Span.Slice #68946
• Add analyzer for StringBuilder[int] indexer #64545
• Analyzer: Validate literal arguments to StringSyntaxAttribute parameters/members #64009
• Analyzer proposal: treat calls to ROS<char> op_Equality as warning #54794
• Add analyzer: Prevent wrong usage of string Split #47927
• NonCopyable structs attribute and analyzer #50389
• Prefer string.Equals over string.Compare(string, string) == 0 or != 0 #34514
• Extract array of const to static readonly field #33794
• Prefer static ReadOnlySpan<byte> properties over static readonly byte[] fields #33780
• Warnings for in/readonly ref #77625

Quality/Performance

• Consider expanding number formatting cache to larger values #76888
• [tvOS][test] System.Runtime.Extensions BitOperationsTests BitOps_Crc32C_byte crash #76830
• System.Runtime test suite does not always run the same number of tests #76285
• Special-case enums in interpolated string handlers #76157
• Boost performance of localized, non-static or incremental string formatting. #50330
• Cache most popular string objects in String.InternalSubString #73540
• Serialization.Formatters.Tests - numerous failures with server GC #58642

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Issue Details

---

This is a work in progress as we develop our .NET 8 plans. This list is expected to change throughout the release cycle according to ongoing planning and discussions, with possible additions and subtractions to the scope.

Summary

The System.Runtime area represents our primitive types and other fundamental APIs. During .NET 8, we will tentatively consider the following tasks.

Planned for .NET 8

Enhancements / New APIs

• [API Proposal]: OperatingSystem.IsWasi() #78389
• [API Proposal]: MemoryExtensions.AsSpan(this string? text, Range range) #77955
• [API Proposal]: ArgumentException helper methods #77749
• [API Proposal]: string.GetHashCodeNonRandomized #77679
• [API Proposal]: Create array from array type #76478
• [API Proposal]: Alternative span/memory/string splitting API #76186
• [API Proposal]: MemoryExtensions.Count / number of occurrences of a value in a span #59466
• [API Proposal]: Add method TryFormat for Enum #57881
• CommandLineToArgvW has different behavior than SegmentCommandLine #77644
• [API Proposal]: Modify Float/Double Equals and CompareTo to reflect -0.0 and +0.0 difference and ordering #73583
• [API Proposal]: Add API to check if process had administrator privileges #68770
• Add "Create" method to EqualityComparer<> class #24460

Analyzers

• [Analyzer] Lift arrays of literals to static fields #78398
• Warn about ArrayPool.Return without clearArray specified when T is not a value type or has references #71698
• [Analyzer proposal]: Simplify calls to string.Substring and Memory/Span.Slice #68946
• Add analyzer for StringBuilder[int] indexer #64545
• Analyzer: Validate literal arguments to StringSyntaxAttribute parameters/members #64009
• Analyzer proposal: treat calls to ROS<char> op_Equality as warning #54794
• Add analyzer: Prevent wrong usage of string Split #47927
• NonCopyable structs attribute and analyzer #50389
• Prefer string.Equals over string.Compare(string, string) == 0 or != 0 #34514
• Extract array of const to static readonly field #33794
• Prefer static ReadOnlySpan<byte> properties over static readonly byte[] fields #33780
• Warnings for in/readonly ref #77625

Quality/Performance

• Consider expanding number formatting cache to larger values #76888
• [tvOS][test] System.Runtime.Extensions BitOperationsTests BitOps_Crc32C_byte crash #76830
• System.Runtime test suite does not always run the same number of tests #76285
• Special-case enums in interpolated string handlers #76157
• Boost performance of localized, non-static or incremental string formatting. #50330
• Cache most popular string objects in String.InternalSubString #73540
• Serialization.Formatters.Tests - numerous failures with server GC #58642

Author:	dakersnar
Assignees:	jeffhandley, stephentoub, tannergooding, dakersnar, michaelgsharp
Labels:	Epic, area-System.Runtime, Team:Libraries
Milestone:	8.0.0

[tannergooding]

Closing as this was a meta issue.

The core work got completed. Various non-critical bits were pushed out or not worked on.