dotnet/roslyn

need a better error message for invalid lambda capturing of ref-like types

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#22,058 创建于 2017年9月11日

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Area-CompilersBugConcept-Diagnostic ClarityFeature - Readonly ReferencesLanguage-C#help wanted

描述

See the use of ERR_AnonDelegateCantUseLocal

We are reusing the same errors for ref variables and for ref-like values. In the second case it could be confusing, although coming up with a better error is not easy. It should not at least say "ref" - that is not a problem here, probably "ref-like types"

贡献者指南

技术栈
csharp
领域
tooling
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
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1-3 hours
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stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
C# compiler internalserror message codesref like types
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
35
研究方向
Examine the code where ERR AnonDelegateCantUseLocal is defined and used. The error message likely resides in a resource file or diagnostic descriptor. Determine how the error is generated for ref like types vs ref variables, and propose a new distinct error message for ref like types. Ensure the change does not break existing tests.
need a better error message for invalid lambda capturing of ref-like types · dotnet/roslyn#22058 | Good First Issue