Compilation fails inside VS with "Unnamed types are not supported" in presence of a JS method with Memory<byte> argument

[ceztko]

In a NAOT enabled project, the regular .NET compilation (not the AOT publish) fails inside Visual Studio (only) if a Memory<byte> argument is used in a JS exported method. Accordingly to this message, Memory<byte> can be used to project a UInt8Array parameter in JS, and this works perfectly with a compilation issued from the command line with dotnet build or dotnet publish . Instead, the regular .NET compilation inside Visual Studio fails with the following generator related error:

Error (active)	NAPI1001	NotSupportedException : Unnamed types are not supported: void*
at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.AsType(ITypeSymbol typeSymbol, Type[] genericTypeParameters, Boolean buildType)
at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.BuildSymbolicConstructor(TypeBuilder typeBuilder, IMethodSymbol constructorSymbol, Type[] genericTypeParameters)
at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.BuildSymbolicTypeMembers(ITypeSymbol typeSymbol, TypeBuilder typeBuilder, Type[] genericTypeParameters)
at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.BuildSymbolicObjectType(INamedTypeSymbol typeSymbol, String typeFullName, Type[] genericTypeParameters, Boolean buildType)   at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.AsType(ITypeSymbol typeSymbol, Type[] genericTypeParameters, Boolean buildType)
at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.BuildSymbolicMethod(TypeBuilder typeBuilder, IMethodSymbol methodSymbol, Type[] genericTypeParameters)   at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.BuildSymbolicTypeMembers(ITypeSymbol typeSymbol, TypeBuilder typeBuilder, Type[] genericTypeParameters)	aot-npm-package	E:\node-api-dotnet\examples\aot-npm-package\lib\CSC	1		

Steps to reproduce:

• Clone https://github.com/microsoft/node-api-dotnet/tree/main and move to examples/aot-npm-package
• Run dotnet pack ../..
• Open lib/aot-npm-package.csproj with Visual Studio and replace Example.cs with the following content:

using System;

namespace Microsoft.JavaScript.NodeApi.Examples;

[JSExport]
public static class Example
{
    public static void Foo(Memory<byte> bytes)
    {

    }
}

• Build the solution (F6)
• -> Error.

[jasongin]

Fixed in version 0.8.15.

[ceztko]

Thank you so much! We are so happy we chose node-api-dotnet.