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Improve error message for: "The type 'int' does not support the operator 'DivideByInt'"

See original GitHub issue

This was originally opened on CodePlex by latkin

Today this happened to me:

Microsoft (R) F# Interactive version 12.0.20809.1
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> [|2;4;6;8|] |> Seq.average;; 

> [|2;4;6;8|] |> Seq.average;;
  ---------------^^^^^^^^^^^

stdin(1,16): error FS0001: The type 'int' does not support the operator 'DivideByInt'

I was surprised to discover that int does not support DivideByInt. Since many times I have successfully divided ints by other ints.

I think we should either:

Make all numeric types that are divisible by int support DivideByInt or
improve the error message so that it’s not quite so head scratching.

comments dsyme wrote Jun 3, 2014 at 6:02 AM +1 for a better error message

Issue Analytics

State:
Created 9 years ago
Comments:9 (7 by maintainers)

Top GitHub Comments

2reactions

pbachmanncommented, Jul 17, 2021

Thankfully, .NET has been integrated nicely and can substitute here …

let average = [2;4;6;8] |> System.Linq.Enumerable.Average

2reactions

KevinRansomcommented, Aug 22, 2016

@zpbappi , I’m going to close this the current error message and behaviour is at least explainable. Even if averaging a collection of ints seems like something the average API should actually be able to accomplish.

Kevin