Fix gettype unbound generics #1165#1230
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Fix gettype unbound generics #1165#1230GrahamTheCoder wants to merge 3 commits intoicsharpcode:masterfrom
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VB open generics like `Nullable(Of )` generate `IErrorTypeSymbol` when using Roslyn's semantic model which previously forced `TypeConversionAnalyzer` and equality comparisons to fall back to `object` instead of preserving the syntax tree representing `typeof(X<>)`. This patch correctly yields `OmittedTypeArgumentSyntax` and bypasses the `System.Object` coercion fallback for equality testing. Co-authored-by: GrahamTheCoder <2490482+GrahamTheCoder@users.noreply.github.com>
…e(Of)) Roslyn's Simplifier.Expand replaces missing type arguments (open generics like Nullable(Of)) with an error type fallback (Object), causing GetType(Nullable(Of)) to incorrectly convert to typeof(object) instead of typeof(Nullable<>). Guard against this in NameCanBeExpanded by detecting GenericNameSyntax nodes with missing type arguments and skipping expansion, preserving the open generic form so the conversion visitors can correctly emit OmittedTypeArgument. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Fixes issue #1165 where
GetType(Nullable(Of))incorrectly translates totypeof(object)instead oftypeof(Nullable<>).There seems to be an upstream bug in the roslyn expander that turns
Nullable(Of)intoNullable(Of Object). We'll work around it here.PR created from Jules task 1958760587701317988 started by @GrahamTheCoder and a follow up claude code session