Is there a F# target?

[ChristophSchmidpeter]

In th project file there is the option <DOptions>language=CSharp</DOptions>
Setting it to <DOptions>language=FSharp</DOptions>
results in the error:

The "RunAntlrTool" task returned false but did not log an error

Is it possible to set it to F# / to generate F# code with ANTLR? Or is the only option to create a separate C# project in which the code is generated?

[kaby76]

Sorry, there's no F# target for the standard Antlr4 tool. And, there isn't one either for the Antlr4cs tool and runtime, which is a rewrite of Antlr4 in C# by Sam Harwell.

But, I think you can place the code in a separate csproj and can then interop with F#. I would recommend you pull your .g4's into a directory, and download the Trash trgen dotnet tool (dotnet tool install -g trgen), then in a shell prompt trgen -s name-of-start-rule. It looks in your current directory containing the Antlr grammar, then will create a csproj you can call from F#. You should modify the generated parser driver code for what you need.

[lextm]

You can see how ANTLR generates the skeleton and targets different programming languages from https://github.com/antlr/antlr4/tree/4.13.1/tool/resources/org/antlr/v4/tool/templates/codegen

So if you want F# code to be generated for your ANTLR grammar file(s) you might contribute to the original ANTLR 4 repo the F# related files.