ToTypeSignature performance improvement

Author: ds5678

Cpp2IL.Core/Utils/AsmResolver/ContextToTypeSignature.cs

@@ -15,12 +15,18 @@ private static TypeDefinition GetTypeDefinition(this TypeAnalysisContext context
     }
 
     public static TypeSignature ToTypeSignature(this TypeAnalysisContext context, ModuleDefinition parentModule) => context switch
+    {
+        ReferencedTypeAnalysisContext referencedTypeAnalysisContext => referencedTypeAnalysisContext.ToTypeSignature(parentModule),
+        _ => parentModule.DefaultImporter.ImportType(context.GetTypeDefinition()).ToTypeSignature()
+    };
+
+    public static TypeSignature ToTypeSignature(this ReferencedTypeAnalysisContext context, ModuleDefinition parentModule) => context switch
     {
         GenericParameterTypeAnalysisContext genericParameterTypeAnalysisContext => genericParameterTypeAnalysisContext.ToTypeSignature(parentModule),
         GenericInstanceTypeAnalysisContext genericInstanceTypeAnalysisContext => genericInstanceTypeAnalysisContext.ToTypeSignature(parentModule),
         WrappedTypeAnalysisContext wrappedTypeAnalysisContext => wrappedTypeAnalysisContext.ToTypeSignature(parentModule),
         SentinelTypeAnalysisContext => SentinelTypeSignature.Instance,
-        _ => parentModule.DefaultImporter.ImportType(context.GetTypeDefinition()).ToTypeSignature()
+        _ => throw new ArgumentException($"Unknown referenced type context {context.GetType()}", nameof(context))
     };
 
     public static GenericInstanceTypeSignature ToTypeSignature(this GenericInstanceTypeAnalysisContext context, ModuleDefinition parentModule)