Extensions: improve error recovery in older language versions#80206
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jcouv merged 1 commit intodotnet:mainfrom Sep 11, 2025
Merged
Extensions: improve error recovery in older language versions#80206jcouv merged 1 commit intodotnet:mainfrom
jcouv merged 1 commit intodotnet:mainfrom
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jcouv
commented
Sep 10, 2025
| diagnostics.Add(ErrorCode.ERR_MemberNeedsType, location); | ||
| if (syntax.Identifier.Text == "extension") | ||
| { | ||
| bool reported = !MessageID.IDS_FeatureExtensions.CheckFeatureAvailability(diagnostics, syntax); |
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📝 I intentionally didn't introduce a dedicated error message for this niche scenario, where the user intends to write a constructor but accidentally named it "extension" or should have named the type "extension". I think it's safe to assume the user wants an extension block
jjonescz
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Sep 11, 2025
| UsingTree(""" | ||
| class C | ||
| var src = """ | ||
| static class C |
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Is the langver error not given if the containing class is not static?
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It would, but you'd also get an error (extension must be inside a static class) which isn't relevant to this test
jjonescz
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Sep 11, 2025
333fred
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Sep 11, 2025
* upstream/main: (233 commits) Extensions: add SyntaxGenerator support and AssociatedExtensionImplementation API (dotnet#80170) Fix error when hoisting a non-ref call (dotnet#80138) Ensure that refkinds are rewritten for complex methods (dotnet#79916) Revert Do not go through the workspace to access services DefiniteAssignmentPass.MarkFieldsUsed - avoid infinite recursion due to generic substitution (dotnet#80135) Reduce allocations in AnalyzerDriver.TryExecuteSymbolEndActions (dotnet#79855) RefSafetyAnalysis: Fix handling of nested deconstruction utilizing modern extensions (dotnet#80231) Extensions: adjust rewriting of anonymous type property symbols (dotnet#80211) Extensions: Move public APIs into INamedTypeSymbol (dotnet#80230) Extensions: improve error recovery in older language versions (dotnet#80206) Fall back to `dotnet exec` if apphost does not exist (dotnet#80153) Update dependencies from https://github.com/dotnet/dotnet build 282708 (dotnet#80228) Add a workaround for microsoft/vs-mef#620 Revert "FailFast if the MEF composition is clearly broken" switch from windows combobox to visualstudio combobox (dotnet#80219) Update System.Text.Json in packages which use 4.12 Roslyn (dotnet#80197) add flags to unblock CI (dotnet#80222) Move static members to another type - qualifies static member references in the moved members (dotnet#80178) Fix broken link for C# 14 lambda parameter modifiers ...
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Addresses part of #78961 ("we should probably have better error recovery in older LangVer so that we can offer a dedicated diagnostic to trigger UpgradeProject")
Relates to test plan #76130