Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Match anonymous record's type inference with nominal records inference #759

gusty opened this issue Jun 23, 2019 · 0 comments


None yet
1 participant
Copy link

commented Jun 23, 2019

Title of Suggestion

I propose we use the same type of inference as for nominal records

The way it works now is that anonymous records inference occurs at a later stage.

Pros and Cons

The advantages of making this adjustment to F#: Currently because anonymous records are inferred at a later stage they are more prone to be type annotated than nominal records, which defeats the whole purpose of having anonymous records.

The disadvantages of making this adjustment to F#: Nominal records inference is considered a bit weird because when two records contain the same field names, the compiler takes the last one that was declared.

Extra information

Estimated cost: M

Related suggestions: dotnet/fsharp#6699

Affidavit (please submit!)

Please tick this by placing a cross in the box:

  • This is not a question (e.g. like one you might ask on stackoverflow) and I have searched stackoverflow for discussions of this issue
  • I have searched both open and closed suggestions on this site and believe this is not a duplicate
  • This is not something which has obviously "already been decided" in previous versions of F#. If you're questioning a fundamental design decision that has obviously already been taken (e.g. "Make F# untyped") then please don't submit it.

Please tick all that apply:

  • This is not a breaking change to the F# language design
  • I or my company would be willing to help implement and/or test this
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.