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Support dynamic-typed members in the source generator and analyzer - #2319
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A member typed as `dynamic` (or a collection of `dynamic`) made the MessagePack analyzer and source generator throw NotSupportedException, because QualifiedTypeName and CodeAnalysisUtilities had no case for IDynamicTypeSymbol. Treat `dynamic` as `object`, which is what it is at runtime, and list it with the other built-in types. Fixes MessagePack-CSharp#2318 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Fixes #2318
A member typed as
dynamicmade the analyzer throwAD0001and the source generator fail withCS8785(NotSupportedException: Specified method is not supported.).QualifiedTypeName.Createand the helpers inCodeAnalysisUtilitiesonly handled array, named and type-parameter symbols, so anIDynamicTypeSymbolreached thethrow.This change treats
dynamicthe same asobject, which is what it compiles to:QualifiedTypeName.CreatemapsIDynamicTypeSymboltoSystem.Object, soList<dynamic>orDictionary<string, dynamic>also work.GetArity,GetTypeParametersandGetTypeArgumentsreturn 0 / empty for it, like for a type parameter.dynamicanddynamic[]are added to the built-in type list next toobjectandobject[], so no extra formatter is collected for them.Test:
MsgPack00xAnalyzerTests.DynamicTypedMemberscovers adynamicfield,dynamic[],List<dynamic>andDictionary<string, dynamic>. Onmasterit fails with the AD0001 above; with this change the wholeMessagePack.SourceGenerator.Testsproject passes (161 passed, 9 skipped), run in themcr.microsoft.com/dotnet/sdk:10.0image.🤖 Generated with Claude Code