Blazor Transpiler issue with named Tuples

[jontavakoli]

When Blazor attempts at transpiling the following lines of code into a RenderFragment it combines the tuple type and name which generates a type that does not exists.

[Parameter] public Action<(ApiBase Sender, TResponse Response)> WhenSuccessful { get; set; }

Looking at the “razor.g.cs” file you will find the following transpiled code which is incorrect. Interestingly enough this happens to all, but the last parameter of the tuple.

public static void CreateApi_1<TRequest, TResponse>(global::Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder, int seq, int __seq0, TRequest __arg0, int __seq1, global::System.Net.Http.HttpMethod __arg1, int __seq2, global::System.String __arg2, int __seq3, global::System.Action<(global::ZoyaOpticalEHR.Common.Controls.Apis.ApiBaseSender, TResponse Response)> __arg3, int __seq4, TResponse __arg4, int __seq5, global::Microsoft.AspNetCore.Components.EventCallback<TResponse> __arg5, int __seq6, global::Microsoft.AspNetCore.Components.RenderFragment __arg6)

Notice in the generated code it combines the type and the name of the tuple property.

Using .Net 5.0, and the latest stable version of Visual Studio 2019 (Version 16.8.3)

[ghost]

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[TanayParikh]

Here's another example of this issue: dotnet/aspnetcore#37209.

[Xyncgas]

I don't know if it's related to this, so before making a new issue, I am experience editor error on latest Visual Studio preview with tuple being the parameter of a component in blazor, I compile it, it works

[chsienki]

Can confirm this still repro's for me. @jjonescz Could you take a look? The repro in dotnet/aspnetcore#37209 is easy to reproduce it.