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@cartermp
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Addresses a super common beginner mistake.

image

The quick fix is also correct if the types are both Nullable, at least as of F# 5.

There are several other places where FS00043 can trigger, but this guards on the range of the error only being equal to ==, so it should be safe. A generalized fixer for FS00043 could be interesting, but the errors are rather wide ranging so that is out of scope for now.

@cartermp
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This is ready for review

@abelbraaksma
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Nice!
For Google and Github search to find this, it's FS0043 ;)

@TIHan
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TIHan commented Nov 17, 2020

What happens if you define val (==) and try to use it?

Edit: I see, you check for the error message.

@cartermp
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I'm a clever boy.

@cartermp cartermp added this to the 16.9 milestone Nov 17, 2020
@cartermp cartermp merged commit fb99e6d into dotnet:main Nov 17, 2020
@cartermp cartermp deleted the convert-to-single-equals branch November 17, 2020 23:41
nosami pushed a commit to xamarin/visualfsharp that referenced this pull request Feb 23, 2021
* Add ConvertToSingleEqualsEqualityExpression code fix

* Fix type
nosami pushed a commit to xamarin/visualfsharp that referenced this pull request Jan 26, 2022
* Add ConvertToSingleEqualsEqualityExpression code fix

* Fix type
nosami pushed a commit to xamarin/visualfsharp that referenced this pull request Jan 26, 2022
* Add ConvertToSingleEqualsEqualityExpression code fix

* Fix type
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4 participants