Comment is removed when using array index access syntax, without a leading dot

[benjamin-thomas]

Hello, I'm learning F# and was surprised when I realized my IDE removed my code comment.

I see there are a few related issues, but maybe this simple case could be a useful report?

I use the dot syntax as a workaround but it's not ideal since my IDE warns me about the dot being redundant.

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Issue created from fantomas-online

Code

open System.Collections.Generic

let inventory = Dictionary<string, int>()

inventory.Add("Apples", 1)
inventory.Add("Oranges", 2)
inventory.Add("Bananas", 3)

inventory["Oranges"] // raises an exception if not found
inventory.["Apples"] // raises an exception if not found

Result

open System.Collections.Generic

let inventory = Dictionary<string, int>()

inventory.Add("Apples", 1)
inventory.Add("Oranges", 2)
inventory.Add("Bananas", 3)

inventory["Oranges"]
inventory.["Apples"] // raises an exception if not found

Problem description

Please describe here the Fantomas problem you encountered.
Check out our Contribution Guidelines.

Extra information

• The formatted result breaks my code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.

Options

Fantomas main branch at 2022-11-04T13:17:40Z - 9f9d03b

Default Fantomas configuration

_{Did you know that you can ignore files when formatting from fantomas-tool or the FAKE targets by using a .fantomasignore file?}

[dawedawe]

Hey Benjamin,
thanks for raising this issue.

In general, we would ask you to use the documentation and try to solve this yourself.
But as you are just getting started with F#, that might be a bit much to ask.
Anyway, you're welcome to have a look at the proposed fix and follow along. Maybe you can learn something from it.

[benjamin-thomas]

Thanks for the fix!

Indeed it's a little early for me to dive in, I'll keep this in mind next time :)

Have a great day