Support for F# anonymous records #2530
Description
Repro
namespace Perf open BenchmarkDotNet.Running open BenchmarkDotNet.Attributes module Main = type Test() = [<Benchmark>] member _.AnonymousRecord() = let array = Array.init 5 id array |> Array.countBy (fun n -> {| Field = n |}) [<EntryPoint>] let main args = printfn "Running benchmarks..." BenchmarkSwitcher.FromAssembly(typeof<Test>.Assembly).Run(args) |> ignore 0What happens
// Build Error: Standard output: Standard error: MSBuild version 17.10.0-preview-23619-02+5cf78584f for .NET C:\Program Files\dotnet\sdk\9.0.100-alpha.1.23620.14\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInference.targets(311,5): message NETSDK1057: You are using a preview version of .NET. See: https://aka.ms/dotnet-support-policy [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,37): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,37): error CS1003: Syntax error, '(' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,80): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,94): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,94): error CS1003: Syntax error, ',' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,95): error CS1003: Syntax error, ',' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,96): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,114): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,114): error CS1003: Syntax error, ',' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,115): error CS8124: Tuple must contain at least two elements. [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,116): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(186,116): error CS1026: ) expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,38): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,38): error CS1003: Syntax error, '(' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,81): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,95): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,95): error CS1003: Syntax error, ',' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,96): error CS1003: Syntax error, ',' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,97): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,115): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,115): error CS1003: Syntax error, ',' expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,116): error CS8124: Tuple must contain at least two elements. [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,117): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(188,117): error CS1026: ) expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(239,29): error CS1519: Invalid token '<<' in class, record, struct, or interface member declaration [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(239,72): error CS1519: Invalid token ',' in class, record, struct, or interface member declaration [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(239,86): error CS1519: Invalid token '>' in class, record, struct, or interface member declaration [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(239,88): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(318,28): error CS1519: Invalid token '<<' in class, record, struct, or interface member declaration [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(318,71): error CS1519: Invalid token ',' in class, record, struct, or interface member declaration [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(318,85): error CS1519: Invalid token '>' in class, record, struct, or interface member declaration [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(318,87): error CS1001: Identifier expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(326,40): error CS1026: ) expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(326,42): error CS1525: Invalid expression term '>' [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(326,83): error CS1002: ; expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(326,83): error CS1513: } expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(326,100): error CS1002: ; expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\1a71ca95-94eb-441e-9549-46a619937196.notcs(326,100): error CS1513: } expected [FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196\BenchmarkDotNet.Autogenerated.csproj] Build FAILED 38 Error(s) Time Elapsed 00:00:01.94 // BenchmarkDotNet has failed to build the auto-generated boilerplate code. // It can be found in FSharpConsoleApp\bin\Release\net8.0\1a71ca95-94eb-441e-9549-46a619937196 // Please follow the troubleshooting guide: https://benchmarkdotnet.org/articles/guides/troubleshooting.html What should happen
Well something more clear. It should either work or give a clear message. This might be related to the fact that anon records in F# are very generic under the hood and AFAIK BDN has problems with those.
Env
BenchmarkDotNet v0.13.12, Windows 11 (10.0.22621.3155/22H2/2022Update/SunValley2) 11th Gen Intel Core i7-1185G7 3.00GHz, 1 CPU, 8 logical and 4 physical cores .NET SDK 9.0.100-alpha.1.23620.14 [Host] : .NET 8.0.2 (8.0.224.6711), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI DEBUG