microsoft / microsoft/node-api-dotnet

Support exporting generic types and methods to JS from a .NET module

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#289 3 comments 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
C#
Stars
783
Forks
80
PR merge metrics
No merged PRs in 30d

Description

Hello,
The next code fails nodejs module generation with an error.
The code:

    public class CollectionBase<T>
    {
        public CollectionBase()
        {
        }
        public void Add(T item) { }
    }

The error:

CSC : error NAPI1001: NotSupportedException : This method is not supported on signature types.   at System.Reflection.Sig natureType.GetConstructors(BindingFlags bindingAttr)   at Microsoft.JavaScript.NodeApi.Generator.SymbolExtensions.AsConst ructorInfo(IMethodSymbol methodSymbol)   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.ToArray()   at Microso ft.JavaScript.NodeApi.Generator.ModuleGenerator.ExportType(SourceBuilder& s, ITypeSymbol type, String exportName)   at Mi crosoft.JavaScript.NodeApi.Generator.ModuleGenerator.ExportModule(SourceBuilder& s, ITypeSymbol moduleType, IEnumerable`1  exportItems)   at Microsoft.JavaScript.NodeApi.Generator.ModuleGenerator.GenerateModuleInitializer(ISymbol moduleInitial izer, IEnumerable`1 exportItems)   at Microsoft.JavaScript.NodeApi.Generator.ModuleGenerator.Execute(GeneratorExecutionCo ntext context) [ConsoleApp1.csproj]                                                                                                                                   

Command:

dotnet clean
dotnet build-server shutdown
dotnet publish ConsoleApp1.csproj -r win-x64 -f net8.0 

Version: 0.7.8
AOT is enabled

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the failure with the provided generic CollectionBase and the dotnet publish command. Start with SymbolExtensions.AsConstructorInfo and ModuleGenerator.ExportType from the stack trace; done means generic types and methods can be exported to the generated Node.js module without the NAPI1001 exception.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp, node.js
Domain
api
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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