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The F# compiler, F# core library, and F# editor tools

Build Status Help Wanted

You're invited to contribute to future releases of the F# compiler, core library, and tools. Development of this repository can be done on any OS supported by .NET.

You will also need .NET SDK installed from here, exact version can be found in the global.json file in the root of the repository.

Contributing

Quickstart on Windows

Build from the command line:

build.cmd

The build depends on an installation of Visual Studio. To build the compiler without this dependency use:

build.cmd -noVisualStudio

After it's finished, open either FSharp.sln or VisualFSharp.sln in your editor of choice. The latter solution is larger but includes the F# tools for Visual Studio and its associated infrastructure.

Quickstart on Linux or macOS

Build from the command line:

./build.sh

After it's finished, open FSharp.sln in your editor of choice.

Documentation for contributors

Documentation for F# community

No contribution is too small

Even if you find a single-character typo, we're happy to take the change! Although the codebase can feel daunting for beginners, we and other contributors are happy to help you along.

Per-build NuGet packages

7.0.40x series

FSharp.Compiler.Service 43.7.400-preview

<add key="fsharp-prerelease" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet7/nuget/v3/index.json" />

8.0.10x series

FSharp.Compiler.Service 43.8.100-preview

<add key="fsharp-prerelease" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet8/nuget/v3/index.json" />

NOTE: Official NuGet releases of FCS and FSharp.Core are synched with SDK releases (on purpose - we want to be in sync). Nightly packages release to Azure feeds on every successful insertion.

Branches

These are the branches in use:

F# language and core library evolution

Evolution of the F# language and core library follows a process spanning two additional repositories. The process is as follows:

  1. Use the F# language suggestions repo to search for ideas, vote on ones you like, submit new ideas, and discuss details with the F# community.
  2. Ideas that are "approved in principle" are eligible for a new RFC in the F# language design repo. This is where the technical specification and discussion of approved suggestions go.
  3. Implementations and testing of an RFC are submitted to this repository.

License

This project is subject to the MIT License. A copy of this license is in License.txt.

Code of Conduct

This project has adopted the Contributor Covenant code of conduct to clarify expected behavior in our community. You can read it at CODE_OF_CONDUCT.

Get In Touch

Members of the F# Software Foundation are invited to the FSSF Slack. You can find support from other contributors in the #compiler and #editor-support channels.

Additionally, you can use the #fsharp tag on Twitter if you have general F# questions, including about this repository. Chances are you'll get multiple responses.

About F#

If you're curious about F# itself, check out these links: